Research Article |
Corresponding author: Bin Wang ( wangbin@cib.ac.cn ) Corresponding author: Jun Wu ( wujun@nies.org ) Academic editor: Annemarie Ohler
© 2020 Yanqing Wu, Shize Li, Wei Liu, Bin Wang, Jun Wu.
This is an open access article distributed under the terms of the Creative Commons Attribution License (CC BY 4.0), which permits unrestricted use, distribution, and reproduction in any medium, provided the original author and source are credited.
Citation:
Wu Y, Li S, Liu W, Wang B, Wu J (2020) Description of a new horned toad of Megophrys Kuhl & Van Hasselt, 1822 (Amphibia, Megophryidae) from Zhejiang Province, China. ZooKeys 1005: 73-102. https://doi.org/10.3897/zookeys.1005.58629
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A new species of the Asian horned toad genus Megophrys is described from Zhejiang Province, China, based on multiple data. Molecular phylogenetic analyses based on mitochondrial DNA indicated the new species as an independent clade deeply clustered into the Megophrys clade. The new species is identified from its congeners by a combination of the following characters: body size small (SVL 28.4–32.4 mm in males); vomerine teeth absent; tongue not notched behind; tympanum distinctly visible, oval; a small horn-like tubercle present at the edge of each upper eyelid; two metacarpal tubercles distinctly visible in hand; toes without webbing; heels overlapped when thighs are positioned at right angles to the body; tibiotarsal articulation reaching the level to middle of eye when leg stretched forward; an internal single subgular vocal sac in male; in breeding male, the nuptial pads present on the dorsal base of the first two fingers.
Molecular phylogenetic analyses, morphology, new species, taxonomy, toad
The Asian horned toad Megophrys Kuhl & Van Hasselt, 1822 (Anura: Megophryidae Bonaparte, 1850) is widely distributed in eastern and central China, throughout southeastern Asia, and extending to the islands of the Sunda Shelf and the Philippines (
Wuyi Mountain region, located in northern Fujian, southeastern Jiangxi and south Zhejiang provinces of China, is a biodiversity hotspot. In this region, four Megophrys species have been recorded, i.e., M. boettgeri (Boulenger, 1899), M. kuatunensis Pope, 1929, M. ombrophila Messenger & Dahn, 2019, and M. lishuiensis Wang, Liu & Jiang, 2017. However, many mountains in this region, especially in south Zhejiang Province, have been poorly investigated.
During field surveys in Qingyuan County, Zhejiang Province, China, we collected Megophrys specimens. Molecular phylogenetic analyses and morphological comparisons supported some of these specimens as an undescribed taxon that we describe herein as a new species.
A total of 15 specimens were sampled in this study: six adult males and one tadpole of the undescribed species and two adult males of M. boettgeri from Qingyuan County, Zhejiang Province, China, and one adult male of M. ombrophila and six adult males of M. kuatunensis from Wuyi Mountain, Fujian Province, China (Table
Information for samples used in molecular phylogenetic analyses in this study.
ID | Species | Voucher number | Locality | GenBank accession number | |
---|---|---|---|---|---|
16S | COI | ||||
1 | Megophrys baishanzuensis sp. nov. | CIBQY20200719001 | Baishanzu National Park, Qingyuan, Zhejiang, China | MW001150 | MT998291 |
2 | Megophrys baishanzuensis sp. nov. | CIBQY20200719002 | MW001151 | MT998292 | |
3 | Megophrys baishanzuensis sp. nov. | CIBQY20200719003 | MW001152 | MT998293 | |
4 | Megophrys baishanzuensis sp. nov. | CIBQY20200719004 | MW001153 | MT998294 | |
5 | Megophrys baishanzuensis sp. nov. | CIBQY20200719006 | MW001154 | MT998295 | |
6 | Megophrys baishanzuensis sp. nov. | CIBQY20200726001 | MW001155 | MT998296 | |
7 | Megophrys baishanzuensis sp. nov. | CIBQY20200726002 | MW001156 | MT998297 | |
8 | Megophrys kuatunensis | CIBWY18082407 | Wuyi Shan, Fujian, China | MW001157 | MT998298 |
9 | Megophrys kuatunensis | CIBWY18082408 | MW001158 | MT998299 | |
10 | Megophrys kuatunensis | SYS a001579 | KJ560376 | – | |
11 | Megophrys lini | SYS a002370 | Suichuan, Jiangxi, China | KJ560412 | – |
12 | Megophrys xiangnanensis | SYS a002874 | Yangming Shan, Hunan, China | MH406713 | MH406165 |
13 | Megophrys nanlingensis | SYS a001959 | Nanling Nature Reserve, Guangdong, China | MK524111 | MK524142 |
14 | Megophrys dongguanensis | SYS a001972 | Yinping Shan, Guangdong, China | MK524098 | MK524129 |
15 | Megophrys nankunensis | SYS a004498 | Nankun Shan, Guangdong, China | MK524108 | MK524139 |
16 | Megophrys cheni | SYS a001427 | Jinggang Shan, Jiangxi, China | KJ560391 | – |
17 | Megophrys wugongensis | SYS a002610 | Wugongshan Scenic Area, Jiangxi, China | MK524114 | MK524145 |
18 | Megophrys ombrophila | KRM18 | Wuyishan, Fujian, China | KX856404 | – |
19 | Megophrys ombrophila | CIBWY18082308 | MW001159 | MT998300 | |
20 | Megophrys obesa | SYS a002272 | Heishiding Nature Reserve, Guangdong, China | KJ579122 | – |
21 | Megophrys lishuiensis | WYF00169 | Lishui, zhejiang, China | KY021418 | – |
22 | Megophrys xianjuensis | CIBXJ190505 | Xianju, zhejiang, China | MN563753 | MN563769 |
23 | Megophrys jinggangensis | KIZ07132 | Chashan Forest Farm, Jiangxi, China | KX811840 | KX812108 |
24 | Megophrys boettgeri | CIB20200718001 | Baishanzu National Park, Qingyuan, Zhejiang, China | MW001160 | MT998301 |
25 | Megophrys boettgeri | CIB20200718002 | Baishanzu National Park, Qingyuan, Zhejiang, China | MW001161 | MT998302 |
26 | Megophrys boettgeri | Tissue ID: YPXJK033 | Wuyi Shan, Fujian, China | KX811814 | KX812104 |
27 | Megophrys huangshanensis | KIZ022004 | Huang Shan, Anhui, China | KX811821 | KX812107 |
28 | Megophrys liboensis | GNUG:20160408003 | Libo, Guizhou, China | MF285262 | – |
29 | Megophrys mufumontana | SYS a006391 | Mufu Shan, Hunan, China | MK524105 | MK524136 |
30 | Megophrys wushanensis | KIZ045469 | Guangwu Shan, Sichuan, China | KX811838 | KX812094 |
31 | Megophrys baolongensis | KIZ019216 | Baolong, Chongqing, China | KX811813 | KX812093 |
32 | Megophrys tuberogranulata | Tissue ID: YPX10987 | Badagongshan Nature Reserve, Hunan, China | KX811823 | KX812095 |
33 | Megophrys yangmingensis | SYS a002877 | Yangming Shan, Hunan, China | MH406716 | MH406168 |
34 | Megophrys shimentaina | SYS a002077 | Shimentai Nature Reserve Guangdong, China | MH406655 | MH406092 |
35 | Megophrys jiulianensis | SYS a002107 | Jiulian Shan, Jiangxi, China | MK524099 | MK524130 |
36 | Megophrys shunhuangensis | HNNU16SH02 | Shunhuang Mountains, Hunan, China | MK836037 | – |
37 | Megophrys mirabilis | SYS a002192 | Huaping Nature Reserve, Guangxi, China | MH406669 | MH406109 |
38 | Megophrys leishanensis | CIBLS20171101001 | Leigong Shan, Guizhou, China | MK005310 | MK005306 |
39 | Megophrys omeimontis | KIZ025765 | Emei Shan, Sichuan, China | KX811884 | KX812136 |
40 | Megophrys angka | KIZ040591 | Kiew Mae Pan nature trail, Chiang Mai, Thailand | MN508052 | – |
41 | Megophrys binchuanensis | KIZ019441 | Jizu Shan, Yunnan, China | KX811849 | KX812112 |
42 | Megophrys palpebralespinosa | KIZ011603 | Pu Hu Nature Reserve, Thanh Hoa, Vietnam | KX811888 | KX812137 |
43 | Megophrys spinata | SYSa002227 | Leigong Shan, Guizhou, China | MH406676 | MH406116 |
44 | Megophrys sangzhiensis | SYSa004307 | Zhangjiajie, Hunan, China | MH406798 | MH406260 |
45 | Megophrys binlingensis | SYSa005313 | Wawu Shan, Sichuan, China | MH406892 | MH406354 |
46 | Megophrys wuliangshanensis | KIZ046812 | Huangcaoling, Yunnan, China | KX811881 | KX812129 |
47 | Megophrys daweimontis | KIZ048997 | Dawei Shan, Yunnan, China | KX811867 | KX812125 |
48 | Megophrys jingdongensis | KIZ-LC0805067 | Huanglianshan National Nature Reserve, Yunnan, China | KX811872 | KX812131 |
49 | Megophrys fansipanensis | VNMN 2018.01 | Lao Cai, Sa Pa, Vietnam | MH514886 | – |
50 | Megophrys hoanglienensis | VNMN 2018.02 | Lao Cai, Sa Pa, Vietnam | MH514889 | – |
51 | Megophrys minor | KIZ01939 | Qingcheng Shan, Sichuan, China | KX811896 | KX812145 |
52 | Megophrys jiangi | CIBKKS20180722006 | Kuankuosui Nature Reserve, Guizhou, China | MN107743 | MN107748 |
53 | Megophrys chishuiensis | CIBCS20190518031 | Chishui Nature Reserve, Guizhou, China | MN954707 | MN928958 |
54 | Megophrys brachykolos | ROM 16634 | Hong Kong, China | KX811897 | KX812150 |
55 | Megophrys acuta | SYS a001957 | Heishiding Nature Reserve, Guangdong, China | KJ579118 | – |
56 | Megophrys gerti | ITBCZ 1108 | Nui Chua National Park, Ninh Thuan, Vietnam | KX811917 | KX812161 |
57 | Megophrys elfina | ZMMU ABV-00454 | Bidoup Mountain, Lam Dong, Vietnam | KY425379 | – |
58 | Megophrys synoria | FMNH 262778 | O’Reang, Mondolkiri, Cambodia | KY022198 | – |
59 | Megophrys hansi | KIZ010360 | Phong Dien Nature Reserve, Thua Thien Hue, Vietnam | KX811913 | KX812155 |
60 | Megophrys microstoma | KIZ048799 | Xiaoqiaogou Nature Reserve, Yunnan, China | KX811914 | KX812156 |
61 | Megophrys pachyproctus | KIZ010978 | Beibeng, Xizang, China | KX811908 | KX812153 |
62 | Megophrys baluensis | ZMH A13125 | Gunung Kinabalu National Park, Kogopan Trail, Malaysia | KJ831310 | – |
63 | Megophrys stejnegeri | KU 314303 | Pasonanca Natural Park, Zamboanga, Philippines | KX811922 | KX812052 |
64 | Megophrys ligayae | ZMMU NAP-05015 | Palawan, Philippines | KX811919 | KX812051 |
65 | Megophrys kobayashii | UNIMAS 8148 | Gunung Kinabalu National Park, Sabah, Malaysia | KJ831313 | – |
66 | Megophrys nasuta | KIZ019419 | Malaysia | KX811921 | KX812054 |
67 | Megophrys edwardinae | FMNH 273694 | Bintulu, Sarawak, Malaysia | KX811918 | KX812050 |
68 | Megophrys aceras | KIZ025467 | Khao Nan National Park, Nakhon Si Thammarat, Thailand | KX811925 | KX812159 |
69 | Megophrys maosonensis | KIZ016045 | Xiaoqiaogou Nature Reserve, Yunnan, China | KX811780 | KX812080 |
70 | Megophrys mangshanensis | KIZ021786 | Nanling National Forest Park, Guangdong, China | KX811790 | KX812079 |
71 | Megophrys flavipunctata | SDBDU2009.297 | East Khasi Hills dist., Meghalaya | KY022307 | MH647536 |
72 | Megophrys glandulosa | KIZ048439 | Husa, Yunnan, China | KX811762 | KX812075 |
73 | Megophrys medogensis | KIZ06621 | Beibeng, Xizang, China | KX811767 | KX812082 |
74 | Megophrys periosa | BNHS 6061 | West Kameng dist., Arunachal Pradesh, IN | KY022309 | MH647528 |
75 | Megophrys himalayana | SDBDU2009.75 | East Siang dist., Arunachal Pradesh, IN | KY022311 | – |
76 | Megophrys sanu | K5198/ZSI11393 | – | KX894679 | – |
77 | Megophrys zhangi | KIZ014278 | Zhangmu, Xizang, China | KX811765 | KX812084 |
78 | Megophrys katabhako | ZSIA11799 | – | KX894669 | – |
79 | Megophrys major | SYSa002961 | Zhushihe, Yunnan, China | MH406728 | MH406180 |
80 | Megophrys oreocrypta | BNHS 6046 | West Garo Hills dist., Meghalaya | KY022306 | – |
81 | Megophrys auralensis | NCSM 79599 | Aural, Kampong Speu, Cambodia | KX811807 | – |
82 | Megophrys parva | SYSa003042 | Zhushihe, Yunnan, China | MH406737 | MH406189 |
83 | Megophrys dringi | UNIMAS 8943 | Gunung Mulu National Park, Sarawak, Malaysia | KJ831317 | – |
84 | Megophrys nankiangensis |
|
Nanjiang, Sichuan, China | KX811900 | – |
85 | Megophrys wawuensis | KIZ025799 | Wawu Shan, Sichuan, China | KX811902 | KX812062 |
86 | Megophrys gigantica | SYSa003933 | Wuliang shan, Yunnan, China | MH406775 | MH406235 |
87 | Megophrys shapingensis | KIZ014512 | Liziping Nature Reserve, Sichuan, China | KX811904 | KX812060 |
88 | Megophrys feae | KIZ046706 | Huangcaoling, Yunnan, China | KX811810 | KX812056 |
89 | Megophrys chuannanensis | CIB20050081 | Hejiang, Sichuan, China | KM504261 | – |
90 | Megophrys carinense | Tissue ID: YPX20455 | Dayao Shan, Guangxi, China | KX811811 | KX812057 |
91 | Megophrys popei | SYS a000589 | Naling Nature Reserve, Guangdong, China | KM504251 | – |
92 | Megophrys intermedia | ZFMK 87596 | U Bo, Phong Nha-Ke Bang NP, Vietnam | HQ588950 | – |
93 | Megophrys Montana | LSUMZ 81916 | Sukabumi, Java, Indonesia | KX811927 | KX812163 |
94 | Megophrys lancip | MZB: Amp:22233 | – | KY679891 | – |
95 | Leptobrachium boringii | Tissue ID: YPX37539 | Emei Shan, Sichuan, China | KX811930 | KX812164 |
96 | Leptobrachella oshanensis | KIZ025778 | Emei Shan, Sichuan, China | KX811928 | KX812166 |
Sampling localities of Megophrys baishanzuensis sp. nov. and its relatives 1 Baishanzu National Park, Qingyuan County, Zhejiang Province, China, inhabited by Megophrys baishanzuensis sp. nov. and M. boettgeri 2 Wuyi Mountain, Wuyishan City, Fujian Province, China, inhabited by M. boettgeri, M. kuatunensis, and M. ombrophila.
Six adult males and one tadpole of the undescribed species, two M. kuatunensis, one M. ombrophila, and two M. boettgeri were included in the molecular analyses (Table
For molecular analyses, the available sequences for congeners of Megophrys were downloaded from GenBank (Table
Six adult males and one tadpole of the undescribed species were measured (Table
ED eye diameter (distance from the anterior corner to the posterior corner of the eye);
FIL first finger length (distance from base to tip of finger I);
FIIL second finger length (distance from base to tip of finger II);
FIIIL third finger length (distance from base to tip of finger III);
FIVL fourth finger length (distance from base to tip of finger IV);
FL foot length (distance from tarsus to the tip of fourth toe);
HDL head length (distance from the tip of the snout to the articulation of jaw);
HDW maximum head width (greatest width between the left and right articulations of jaw);
HAL hand length (distance from tip of third digit to proximal edge of inner palmar tubercle);
IND internasal distance (minimum distance between the inner margins of the external nares);
IOD interorbital distance (minimum distance between the inner edges of the upper eyelids);
LAL length of lower arm and hand (distance from the elbow to the distal end of the Finger IV);
LW lower arm width (maximum width of the lower arm);
SNT distance between the nasal the posterior edge of the vent;
SVL snout-vent length (distance from the tip of the snout to the posterior edge of the vent);
SL snout length (distance from the tip of the snout to the anterior corner of the eye);
TFL length of foot and tarsus (distance from the tibiotarsal articulation to the distal end of the Toe IV);
THL thigh length (distance from vent to knee);
TL tibia length (distance from knee to tarsus);
TW maximal tibia width;
TYD maximal tympanum diameter;
UEW upper eyelid width (greatest width of the upper eyelid margins measured perpendicular to the anterior-posterior axis).
For the single tadpole of the undescribed species, eleven morphometric characters were measured:
BH maximum body height;
BW maximum body width;
IOS interocular distance (minimum distance between eye);
MW mouth width (distance between two corners of mouth);
SL snout length (distance from the tip of the snout to the anterior corner of the eye);
SS snout to spiraculum (distance from spiraculum to the tip of the snout);
SVL snout-vent length;
TAH tail height (maximum height between upper and lower edges of tail);
TAL tail length (distance from base of vent to the tip of tail);
TBW maximum width of tail base;
TOL total length (distance from the tip of the snout to the tip of tail).
To reduce the impact of allometry, the correct value from the ratio of each character to SVL was calculated, and then was log-transformed for the following morphometric analyses. Mann-Whitney U tests were conducted to test the significance of differences on morphometric characters between the undescribed species and M. kuatunensis. The significance level was set at 0.05. Furthermore, principal component analyses (PCA) were conducted to highlight whether the different species were separated in morphometric space.
The new species was also compared with all other Megophrys species on morphology. Comparative data were obtained for related species as described in literature (Table
References for morphological characters for congeners of the genus Megophrys.
Species | Literature obtained |
---|---|
M. aceras Boulenger, 1903 |
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M. acuta Wang, Li & Jin, 2014 |
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M. ancrae Mahony, Teeling & Biju, 2013 |
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M. angka Wu, Suwannapoom, Poyarkov, Chen, Pawangkhanant, Xu, Jin, Murphy & Che, 2019 |
|
M. auralensis Ohler, Swan & Daltry, 2002 |
|
M. awuh Mahony, Kamei, Teeling, & Biju, 2020 | Mahony et al. 2020 |
M. baluensis (Boulenger, 1899) |
|
M. baolongensis Ye, Fei & Xie, 2007 |
|
M. binchuanensis Ye & Fei, 1995 |
|
M. binlingensis Jiang, Fei & Ye, 2009 |
|
M. boettgerii (Boulenger, 1899) |
|
M. brachykolos Inger & Romer, 1961 |
|
M. carinense (Boulenger, 1889) |
|
M. caobangensis Nguyen, Pham, Nguyen, Luong, & Ziegler, 2020 |
|
M. caudoprocta Shen, 1994 |
|
M. cheni (Wang & Liu, 2014) |
|
M. chishuiensis Xu, Li, Liu, Wei & Wang, 2020 |
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M. chuannanensis (Fei, Ye & Huang, 2001) |
|
M. damrei Mahony, 2011 |
|
M. daweimontis Rao & Yang, 1997 |
|
M. dongguanensis Wang & Wang, 2019 |
|
M. dringi Inger, Stuebing & Tan, 1995 |
|
M. dzukou Mahony, Kamei, Teeling & Biju, 2020 | Mahony et al. 2020 |
M. edwardinae Inger, 1989 |
|
M. elfina Poyarkov, Duong, Orlov, Gogoleva, Vassilieva, Nguyen, Nguyen, Nguyen, Che & Mahony, 2017 |
|
M. fansipanensis Tapley, Cutajar, Mahony, Nguyen, Dau, Luong, Le, Nguyen, Nguyen, Portway, Luong & Rowley, 2018 |
|
M. feae Boulenger, 1887 |
|
M. feii Yang, Wang & Wang, 2018 |
|
M. flavipunctata Mahony, Kamei, Teeling & Biju, 2018 |
|
M. gerti (Ohler, 2003) |
|
M. gigantica Liu, Hu & Yang, 1960 |
|
M. glandulosa Fei, Ye & Huang, 1990 |
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M. hansi (Ohler, 2003) |
|
M. himalayana Mahony, Kamei, Teeling & Biju, 2018 |
|
M. hoanglienensis Tapley, Cutajar, Mahony, Nguyen, Dau, Luong, Le, Nguyen, Nguyen, Portway, Luong & Rowley, 2018 |
|
M. huangshanensis Fei & Ye, 2005 |
|
M. insularis (Wang, Liu, Lyu, Zeng & Wang, 2017) |
|
M. intermedia Smith, 1921 |
|
M. jiangi Liu, Li, Wei, Xu, Cheng, Wang & Wu, 2020 |
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M. jingdongensis Fei & Ye, 1983 |
|
M. jinggangensis (Wang, 2012) |
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M. jiulianensis Wang, Zeng, Lyu & Wang, 2019 |
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M. kalimantanensis Munir, Hamidy, Matsui, Iskandar, Sidik & Shimada, 2019 |
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M. kobayashii Malkmus & Matsui, 1997 |
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M. koui Mahony, Foley, Biju & Teeling, 2017 |
|
M. kuatunensis Pope, 1929 |
|
M. lancip Munir, Hamidy, Farajallah & Smith, 2018 |
|
M. leishanensis Li, Xu, Liu, Jiang, Wei & Wang, 2018 | Li et al. 2018 |
M. lekaguli Stuart, Chuaynkern, Chan-ard & Inger, 2006 |
|
M. liboensis (Zhang, Li, Xiao, Li, Pan, Wang, Zhang & Zhou, 2017) |
|
M. ligayae Taylor, 1920 |
|
M. lini (Wang & Yang, 2014) |
|
M. lishuiensis (Wang, Liu & Jiang, 2017) |
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M. longipes Boulenger, 1886 |
|
M. major Boulenger, 1908 |
|
M. mangshanensis Fei & Ye, 1990 |
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M. maosonensis Bourret, 1937 |
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M. medogensis Fei, Ye & Huang, 1983 |
|
M. megacephala Mahony, Sengupta, Kamei & Biju, 2011 |
|
M. microstoma (Boulenger, 1903) |
|
M. minor Stejneger, 1926 |
|
M. mirabilis Lyu, Wang & Zhao |
|
M. montana Kuhl & Van Hasselt, 1822 | |
M. monticola (Günther, 1864) |
|
M. mufumontana Wang, Lyu & Wang, 2019 |
|
M. nankiangensis Liu & Hu, 1966 | |
M. nankunensis Wang, Zeng &. Wang, 2019 |
|
M. nanlingensis Lyu, Wang, Liu & Wang, 2019 |
|
M. nasuta (Schlegel, 1858) |
|
M. numhbumaeng Mahony, Kamei, Teeling, & Biju, 2020 | Mahony et al. 2020 |
M. obesa Wang, Li & Zhao, 2014 |
|
M. ombrophila Messenger & Dahn, 2019 |
|
M. omeimontis Liu, 1950 |
|
M. oreocrypta Mahony, Kamei, Teeling & Biju, 2018 |
|
M. oropedion Mahony, Teeling & Biju, 2013 |
|
M. orientalis Li, Lyu, Wang & Wang, 2020 |
|
M. pachyproctus Huang, 1981 |
|
M. palpebralespinosa Bourret, 1937 |
|
M. parallela Inger & Iskandar, 2005 |
|
M. parva (Boulenger, 1893) |
|
M. periosa Mahony, Kamei, Teeling & Biju, 2018 |
|
M. popei (Zhao, Yang, Chen, Chen & Wang, 2014) |
|
M. robusta Boulenger, 1908 |
|
M. rubrimera Tapley, Cutajar, Mahony, Chung, Dau, Nguyen, Luong & Rowley, 2017 |
|
M. sangzhiensis Jiang, Ye & Fei, 2008 |
|
M. serchhipii (Mathew & Sen, 2007) |
|
M. shapingensis Liu, 1950 |
|
M. shimentaina Lyu, Liu & Wang |
|
M. shuichengensis Tian & Sun, 1995 |
|
M. shunhuangensis Wang, Deng, Liu, Wu & Liu, 2019 |
|
M. spinata Liu & Hu, 1973 |
|
M. stejnegeri Taylor, 1920 |
|
M. synoria (Stuart, Sok & Neang, 2006) |
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M. takensis Mahony, 2011 |
|
M. tuberogranulata Shen, Mo & Li, 2010 | Mo et al. 2012 |
M. vegrandis Mahony, Teeling, Biju, 2013 |
|
M. wawuensis Fei, Jiang & Zheng, 2001 |
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M. wugongensis Wang, Lyu & Wang, 2019 |
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M. wuliangshanensis Ye & Fei, 1995 |
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M. wushanensis Ye & Fei, 1995 |
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M. xianjuensis Wang, Wu, Peng, Shi, Lu & Wu, 2020 |
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M. xiangnanensis Lyu, Zeng & Wang |
|
M. yangmingensis Lyu, Zeng & Wang |
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M. zhangi Ye & Fei, 1992 |
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M. zunhebotoensis (Mathew & Sen, 2007) |
|
The advertisement calls of the undescribed species were recorded from the holotype specimen CIBQY20200726001 in the field on 26 July 2020 from Qingyuan County, Zhejiang Province, China. When registrating the male in the stream the ambient air temperature was 21.5 °C and there was air humidity of 87%. For comparisons, the advertisement calls of M. kuatunensis from Wuyi Mountain, Fujian Province, China were recorded from the specimens CIBWY18082410, CIBWY18082411 and CIBWY18082412 at an ambient air temperature of 22.0 °C and air humidity of 88% on 24 August 2018. SONY PCM-D50 digital sound recorder was used to record within 20 cm of the calling individual. The sound files in wave format were resampled at 48 kHz with sampling depth 24 bits. The sonograms and waveforms were generated by WaveSurfer software (
Aligned sequence matrix of 16S+COI contains 1104 bp. ML and BI trees of the mitochondrial DNA dataset presented almost consistent topology, and as well, though relationships of many clades were unresolved (Fig.
Genetic distances based on 16S and COI genes with uncorrected p-distance model between the samples of the undescribed species were all below 0.2%. The genetic distance between the undescribed species and its closest related species M. kuatunensis were 2.1% and 8.1% on 16S and COI respectively, which was higher or at the same level with those among many pairs of sister species, for example, 1.7% and 3.8% on 16S and COI respectively between M. spinata and M. sangzhiensis (Suppl. materials
In PCA for male group, the total variation of the first two principal components was 47.5%. On the two-dimensional plots of PC1 vs. PC2, the undescribed species was almost separated from M. kuatunensis (Fig.
Morphometric comparisons between the adult specimens of Megophrys baishanzuensis sp. nov. and M. kuatunensis. Units given in mm. See abbreviations for the morphological characters in Materials and methods section. P-value resulted from Mann-Whitney U test. Significant level at 0.05.
Character | Megophrys baishanzuensis sp. nov. | M. kuatunensis | Mann-Whitney U value | P-value | ||
---|---|---|---|---|---|---|
Male (N = 6) | Male (N = 6) | |||||
Ranging | Mean ± SD | Ranging | Mean ± SD | |||
SVL | 28.4–32.4 | 30.5 ± 1.8 | 28.4–32.4 | 30.5 ± 1.8 | 13.000 | 0.423 |
HDL | 8.0–9.1 | 8.6 ± 0.4 | 8.0–9.1 | 8.6 ± 0.4 | 6.000 | 0.055 |
HDW | 9.3–10.5 | 10.2 ± 0.4 | 9.3–10.5 | 10.2 ± 0.4 | 8.000 | 0.109 |
SL | 3.4–4.1 | 3.8 ± 0.3 | 3.4–4.1 | 3.8 ± 0.3 | 16.000 | 0.749 |
SNT | 1.5–2.6 | 2.0 ± 0.4 | 1.5–2.6 | 2.0 ± 0.4 | 18.000 | 1.000 |
IND | 3.1–3.7 | 3.4 ± 0.3 | 3.1–3.7 | 3.48 ± 0.3 | 16.000 | 0.749 |
IOD | 2.8–3.3 | 3.0 ± 0.2 | 2.8–3.3 | 3.08 ± 0.2 | 6.000 | 0.055 |
UEW | 2.3–3.0 | 2.6 ± 0.2 | 2.3–3.0 | 2.6 ± 0.2 | 2.000 | 0.010 |
ED | 3.7–4.0 | 3.8 ± 0.1 | 3.7–4.0 | 3.8 ± 0.1 | 15.000 | 0.631 |
TYD | 1.5–2.1 | 1.8 ± 0.2 | 1.5–2.1 | 1.8 ± 0.2 | 16.000 | 0.749 |
LAL | 13.4–14.6 | 14.1 ± 0.5 | 13.4–14.6 | 14.2 ± 0.5 | 9.000 | 0.150 |
HAL | 6.6–7.9 | 7.1 ± 0.5 | 6.6–7.9 | 7.1 ± 0.5 | 6.000 | 0.055 |
LW | 2.2–2.7 | 2.4 ± 0.2 | 2.2–2.7 | 2.4 ± 0.2 | 10.000 | 0.200 |
FIL | 2.2–2.8 | 2.5 ± 0.2 | 2.2–2.8 | 2.5 ± 0.2 | 17.000 | 0.873 |
FIIL | 2.4–3.0 | 2.7 ± 0.2 | 2.4–3.0 | 2.7 ± 0.2 | 12.000 | 0.200 |
FIIIL | 4.3–5.1 | 4.6 ± 0.3 | 4.3–5.1 | 4.6 ± 0.3 | 10.000 | 0.200 |
FIVL | 2.6–3.6 | 3.0 ± 0.4 | 2.6–3.6 | 3.0 ± 0.4 | 15.000 | 0.631 |
THL | 12.2–13.5 | 12.9 ± 0.5 | 12.2–13.5 | 12.9 ± 0.5 | 10.000 | 0.200 |
TL | 12.8–14.9 | 13.9 ± 0.9 | 12.8–14.9 | 13.9 ± 0.9 | 13.000 | 0.423 |
TW | 2.7–4.2 | 3.3 ± 0.5 | 2.7–4.2 | 3.3 ± 0.5 | 13.000 | 0.423 |
TFL | 17.8–20.4 | 19.4 ± 1.0 | 17.8–20.4 | 19.4 ± 1.0 | 1.000 | 0.006 |
FL | 11.2–12.3 | 11.8 ± 0.4 | 11.2–12.3 | 11.8 ± 0.4 | 13.000 | 0.423 |
There were two differences in sonograms and waveforms of calls between the undescribed species and M. kuatunensis (Fig.
Comparisons of characteristics of advertisement calls of Megophrys baishanzuensis sp. nov. and M. kuatunensis.
Call character | Megophrys baishanzuensis sp. nov. | M. kuatunensis | ||
CIBQY20200726001 | CIBWY2018082410 | CIBWY2018082412 | WY2018082411 | |
Number of call groups measured | 11 | 30 | 30 | 20 |
Number of notes measured | 22 | 30 | 30 | 40 |
Call duration (ms) | 151.0–170.0 (162.4 ± 5.7) | 131.0–163.0 (147.2 ± 7.1) | 131.0–163.0 (147.2 ± 7.1) | 130.0–159.0 (120.9 ± 5.9) |
Call repetition rate (calls/s) | 0.79 | 1.18 | 1.13 | 1.3 |
Intercall interval (ms) | 682.0–1869.0 (936.8 ±349.0) | 404–1548.0 (687.3 ± 206.8) | 404–1548.0 (687.3 ± 206.8) | 350.0–733.0 (458.4 ± 87.1) |
Pulses/call | 23.0–30.0 (26.0 ± 2.4) | 25.0–36.0 (30.0 ± 2.3) | 25.0–36.0 (30.0 ± 2.3) | 32.0–40.4 (35.7 ± 2.3) |
Dominant frequency (kHz) | 3.19–3.38 (3.36 ± 0.06) | 3.38–3.75 (3.46 ± 0.16) | 3.38–3.75 (3.46 ± 0.16) | 3.38–3.38 (3.38±0.01) |
Pulse duration (ms) | 3.0–6.0 (4.9 ± 0.6) | 3.0–6.0 (4.4 ± 0.7) | 3.0–6.0 (4.4 ± 0.7) | 3.0–6.0 (4.5 ± 0.6) |
Visualization of advertisement calls of Megophrys baishanzuensis sp. nov. and M. kuatunensis A–C waveform showing 10 seconds, waveform showing 0.2 seconds and sonogram showing 0.2 seconds of CIBQY20200726001 of Megophrys baishanzuensis sp. nov. D–F waveform showing 10 seconds, waveform showing 0.2 seconds and sonogram showing 0.2seconds of CIBWY18082410 of M. kuatunensis.
Based on the molecular phylogenetic analyses, morphological comparisons (Supp. material 4), and bioacoustics differences, the specimens from Qiangyuan County, Zhejiang Province, China represent a new species which is described as follows.
CIBQY20200726001 (Figs
Five adult males collected from the same place as holotype collected by Bin Wang. CIBQY20200719001-CIBQY20200719004 collected on 19 July 2020 by Bin Wang, and CIBQY20200726002 collected by Zhonghao Luo on 26 July 2020.
One tadpole (CIBQY20200719005; Fig.
Megophrys baishanzuensis sp. nov. is assigned to the genus Megophrys based on molecular phylogenetic analyses and the following generic diagnostic characters: snout shield-like; projecting beyond the lower jaw; canthus rostralis distinct; chest glands small and round, closer to the axilla than to midventral line; femoral glands on rear part of thigh; vertical pupils (
Megophrys baishanzuensis sp. nov. could be distinguished from its congeners by a combination of the following morphological characters: body size small (SVL 28.4–32.4 mm in males); vomerine teeth absent; tongue not notched behind; tympanum distinctly visible, oval; a small horn-like tubercle at the edge of each upper eyelid; two metacarpal tubercles distinctly visible in hand; toes without webbing; heels overlapping when thighs are positioned at right angles to the body; tibiotarsal articulation reaching the level to the middle of eye when leg stretched forward.
(Figs
Forelimbs slender, the length of lower arm and hand 47.0% of SVL; fingers slender, relative finger lengths: I < II < IV < III; tips of digits globular, without lateral fringes; subarticular tubercle distinct at the base of each finger; two metacarpal tubercles, prominent, oval-shaped, the inner one bigger than the outer one.
Hindlimbs slender, tibia length 46.5% times of SVL; heels overlapping when thighs are positioned at right angles to the body, tibiotarsal articulation reaching the middle of eye when leg stretched forward; tibia length longer than thigh length; relative toe lengths I < II < V < III < IV; tips of toes round, slightly dilated; subarticular tubercles absent on each toes; toes without webbing but with narrow lateral fringe; inner metatarsal tubercle oval-shaped; outer metatarsal tubercle absent.
Dorsal skin rough, several large warts scattered on flanks; a small horn-like tubercle at the edge of each upper eyelid; tubercles on the dorsum forming a X-shaped ridge, two dorsolateral parallel ridges on either side of the X-shaped ridges; an inverted triangular brown speckle between two upper eyelidsseveral tubercles scattered on dorsal, flanks and dorsal surface of thighs and tibias; supratympanic fold distinct.
Numerous granules scattered on ventrum; pectoral and femoral glands distinct; numerous white granules on outer thighs.
Coloration of holotype in life.
(Fig.
Photos of the holotype specimen CIBQY20200726001 of Megophrys baishanzuensis sp. nov. and topotype specimen of M. kuatunensis A, B, E, G, H dorsal view of body, ventral view of body, lateral view of head, ventral view of hand, and ventral view of foot of CIBQY20200726001, respectively C, D, F, I, J dorsal view of body, ventral view of body, lateral view of head, ventral view of hand, and ventral view of foot of CIBWY18082413, respectively. Red arrow points to tympanum.
Coloration of holotype in preservation.
(Fig.
Variation.
Fig.
Tadpole description.
Fig.
Advertisement call.
Fig.
Amplitude modulation within note was apparent, beginning with moderately high energy pulses, increasing to the maximum by approximately quarter, and then decreasing towards the end. The average dominant frequency was 3.36 ± 0.06 (3.19–3.38 kHz).
Secondary sexual characters. A single subgular vocal sac present in male. In breeding season, nuptial pads are present on the dorsal base of the first two fingers in males.
Supp. material 4. By having small body size, Megophrys baishanzuensis sp. nov. differs from M. ancrae, M. auralensis, M. awuh, M. baluensis, M. baolongensis, M. binlingensis, M. boettgeri, M. caobangensis, M. carinense, M. caudoprocta, M. chishuiensis, M. chuannanensis, M. damrei, M. daweimontis, M. dzukou, M. edwardinae, M. feae, M. flavipunctata, M. gigantica, M. glandulosa, M. hansi, M. himalayana, M. hoanglienensis, M. huangshanensis, M. insularis, M. jiangi, M. jingdongensis, M. jinggangensis, M. kalimantanensis, M. kobayashii, M. lancip, M. lekaguli, M. liboensis, M. ligayae, M. lini, M. longipes, M. major, M. mangshanensis, M. medogensis, M. megacephala, M. mirabilis, M. montana, M. monticola, M. nasuta, M. obesa, M. omeimontis, M. orientalis, M. pachyproctus, M. palpebralespinosa, M. parallela, M. parva, M. periosa, M. platyparietus, M. popei, M. sangzhiensis, M. serchhipii, M. shapingensis, M. shuichengensis, M. spinata, M. takensis M. wawuensis, and M. xiangnanensis (maximum SVL < 33.0 mm in the new species vs. minimum SVL > 34.0 mm in the latter).
By vomerine teeth absent, Megophrys baishanzuensis sp. nov. differs from M. ancrae, M. baluensis, M. carinense, M. caudoprocta, M. chuannanensis, M. damrei, M. daweimontis, M. dongguanensis, M. dzukou, M. fansipanensis, M. feae, M. flavipunctata, M. glandulosa, M. himalayana, M. hoanglienensis, M. insularis, M. intermedia, M. jingdongensis, M. jinggangensis, M. jiulianensis, M. kalimantanensis, M. kobayashii, M. lancip, M. lekaguli, M. liboensis, M. ligayae, M. longipes, M. mangshanensis, M. maosonensis, M. medogensis, M. megacephala, M. montana, M. nankunensis, M. nanlingensis, M. nasuta, M. numhbumaeng, M. omeimontis, M. oreocrypta, M. orientalis, M. oropedion, M. pachyproctus, M. palpebralespinosa, M. parallela, M. parva, M. periosa, M. platyparietus, M. popei, M. robusta, M. rubrimera, M. serchhipii, M. shimentaina, M. stejnegeri, M. takensis, M. zhangi, and M. zunhebotoensis (vs. present in the latter).
By a small horn-like tubercle present at the edge of each upper eyelid, Megophrys baishanzuensis sp. nov. differs from M. aceras, M. acuta, M. carinense, M. caudoprocta, M. chuannanensis, M. feae, M. gerti, M. hansi, M. intermedia, M. intermedia, M. jinggangensis, M. kalimantanensis, M. koui, M. lancip, M. liboensis, M. microstoma, M. montana, M. nasuta, M. orientalis, M. palpebralespinosa, M. platyparietus, M. popei, M. shuichengensis, M. stejnegeri, and M. synoria (vs. having a prominent and elongated tubercle in the latter).
By tongue not notched behind, Megophrys baishanzuensis sp. nov. differs from M. ancrae, M. baolongensis, M. binlingensis, M. boettgeri, M. carinense, M. cheni, M. chuannanensis, M. damrei, M. dringi, M. dzukou, M. fansipanensis,M. feae, M. feii, M. flavipunctata, M. gerti, M. glandulosa, M. hoanglienensis, M. huangshanensis, M. insularis, M. jiulianensis. M. jingdongensis, M. kalimantanensis, M. kuatunensis, M. liboensis, M. mangshanensis, M. maosonensis, M. medogensis, M. minor, M. nankiangensis, M. nanlingensis, M. numhbumaeng, M. omeimontis, M. oropedion, M. pachyproctus, M. parallela, M. popei, M. robusta, M. sangzhiensis, M. shapingensis, M. shuichengensis, M. spinata, M. vegrandis, M. wawuensis, M. zhangi, and M. zunhebotoensis (vs. notched behind in the latter).
By toes with narrow lateral fringes, Megophrys baishanzuensis sp. nov. differs from M. angka, M. baolongensis, M. brachykolos, M. caobangensis, M. chishuiensis, M. damrei, M. daweimontis, M. dongguanensis, M. fansipanensis, M. feae, M. himalayana, M. hoanglienensis, M. huangshanensis, M. insularis, M. jiangi, M. jiulianensis, M. kalimantanensis, M. koui, M. leishanensis, M. lekaguli, M. lishuiensis, M. major, M. mangshanensis, M. medogensis, M. megacephala, M. microstoma, M. minor, M. nankunensis, M. obesa, M. ombrophila, M. oreocrypta, M. oropedion, M. pachyproctus, M. parva, M. periosa, M. shunhuangensis, M. takensis, M. tuberogranulata, M. wawuensis, M. wugongensis, M. wuliangshanensis and M. xianjuensis (vs. lacking in the latter); and differs from M. binchuanensis, M. boettgeri, M. carinense, M. cheni, M. chuannanensis, M. dringi, M. feii, M. gigantica, M. glandulosa, M. intermedia, M. jingdongensis, M. liboensis, M. lini, M. orientalis, M. palpebralespinosa, M. platyparietus, M. shapingensis, M. shuichengensis, M. spinata, and M. xiangnanensis (vs. with wide lateral fringes in the latter).
By toes without webbing, Megophrys baishanzuensis sp. nov. differs from M. brachykolos, M. carinense, M. flavipunctata, M. jingdongensis, M. jinggangensis, M. lini, M. major, M. palpebralespinosa, M. popei, M. shuichengensis, and M. spinata (vs. at least one-fourth webbed in the latter).
By heels overlapping when thighs are positioned at right angles to the body, Megophrys baishanzuensis sp. nov. differs from M. actuta, M. brachykolos, M. dongguanensis, M. huangshanensis, M. kuatunensis, M. nankunensis, M. obesa, M. ombrophila, M. wushanensis, and M. wugongensis (vs. just meeting or not meeting in the latter).
By tibiotarsal articulation reaching to the level to the middle of eye when leg stretched forward, Megophrys baishanzuensis sp. nov. differs from M. daweimontis, M. glandulosa, M. lini, M. major, M. medogensis, M. obesa, M. sangzhiensis, and M. yangmingensis (vs. reaching the anterior corner of the eye or beyond eye or nostril and tip of snout in the latter); differs from M. mufumontana (vs. reaching tympanum in males and to the eye in females in the latter); and differs from M. chishuiensis (vs. reaching the level between tympanum and eye in the latter).
By having an internal single subgular vocal sac in male, Megophrys baishanzuensis sp. nov. differs from M. caudoprocta, M. shapingensis, and M. shuichengensis (vs. vocal sac absent in the latter).
The congeners M. boettgeri, M. lishuiensis, M. ombrophila, and M. xianjuensis all occur in Wuyi Mountains, Fujian Province and/or Zhejiang Province, China, and probably have sympatric distribution with Megophrys baishanzuensis sp. nov. (
Megophrys baishanzuensis sp. nov. is phylogenetically closest to M. kuatunensis. Megophrys baishanzuensis sp. nov. could be identified from M. kuatunensis distinctly by tibiotarsal articulation reaching the middle of eye when leg stretched forward (vs. reaching the range from tympanum to eye), heels overlapping when thighs are positioned at right angles to the body (vs. not meeting), tongue not notched behind (vs. notched feebly), the supratympanic fold more expanded in dorsal view and tympanum protruding (vs. concave), and having significantly lower ratios of UEW and TFL to SVL in males (all p-values < 0.05; Table
Megophrys baishanzuensis sp. nov. is known from the type locality, Baishanzu National Park, Qingyuan County Zhejiang Province, China, at elevations between 1400–1600 m. The individuals of the new species were frequently found in the stream surrounded by evergreen broadleaved forests (Fig.
The specific name baishanzuensis refers to the distribution of this species, Baishanzu National Park, Qingyuan County, Zhejiang Province, China. We propose the common name “Baishanzu horned toad” (English) and Bai Shan Zu Jiao Chan (百山祖角蟾, Chinese).
Although Megophrys baishanzuensis sp. nov. superficially resembles M. kuatunensis, molecular phylogenetic analyses, detailed morphological comparisons and call datas all proposed the distinct differences between them. Moreover, the breeding seasons of them are different. According to our surveys, the breeding season of M. kuatunensis is in April to May in Wuyi Mountain, Fujian Province, China. But in this season, we did not find any individual of Megophrys baishanzuensis sp. nov. in Qingyuan County, Zhejiang Province, China. And, the breeding season of the new species should be later than June because in June, we only listened to the calls of one male in the type locality (< 10 °C), and, in late July, the males of the species started to call when the temperature was just higher than 18 °C (but we did not find any female individual and egg of it). Different call characteristics and breeding ecology most probably promoted separation of the two species.
During our several and extensive surveys, we only found fewer than 15 adult males of Megophrys baishanzuensis sp. nov., only in a small stream near the top of the mountain in Baishanzu National Park, Zhejiang Province, China, and even then, we did not find any female, and only found four tadpoles of this species. Obviously, the population of the new species is very endemic and small. Fortunately, this population is in a preserved area in Baishanzu National Park. Of course, we still should make a reinforced plan to preserve this area for this toad species.
We thank Zhonghao Luo, Yang Li and Shengchao Shi for their help with collecting samples and data. This work was supported by the Biodiversity Survey Project of Lishui, Zhejiang Province and the Project supported by the Biodiversity investigation, Observation and Assessment Program (2019–2023) of Ministry of Ecology and Environment of China.
Table S1
Data type: morphological measurements
Explanation note: Measurements of the adult specimens of Megophrys baishanzuensis sp. nov. and M. kuatunensis. Units given in mm. See abbreviations for the morphological characters in Materials and methods section.
Table S2
Data type: genetic distance
Explanation note: Uncorrected p-distances between the Megophrys species on the 16S gene.
Table S3
Data type: genetic distance
Explanation note: Uncorrected p-distances between the Megophrys species on the COI gene.
Table S4
Data type: morphological comparisons
Explanation note: Diagnostic characters separating Megophrys baishanzuensis sp. nov. from other species of Megophrys.