Research Article |
Corresponding author: Xin Xu ( xuxin_09@163.com ) Corresponding author: Daiqin Li ( dbslidq@nus.edu.sg ) Academic editor: Miquel A. Arnedo
© 2017 Xin Xu, Chen Xu, Fengxiang Liu, Zengtao Zhang, Daiqin Li.
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:
Xu X, Xu C, Liu F, Zhang Z, Li D (2017) Four new species of the trapdoor spider genus Conothele Thorell, 1878 from Mainland China and Laos (Araneae, Ctenizidae). ZooKeys 643: 63-74. https://doi.org/10.3897/zookeys.643.10543
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Here for the first time the presence of the trapdoor spider genus Conothele Thorell, 1878 (Araneae: Ctenizidae) is reported from mainland China and Laos. Four Conothele species collected from the regions are described as new to science, based on the female genital morphology: C. baiyunensis Xu, Xu & Liu, sp. n. (Guangdong Province), C. daxinensis Xu, Xu & Li, sp. n. (Guangxi Province), C. sidiechongensis Xu, Xu & Liu, sp. n. (Yunnan Province, China and Vietnam), C. yundingensis Xu, Xu & Li, sp. n. (Yunnan Province).
Araneae , China, Conothele , Ctenizidae , Laos, taxonomy
The family Ctenizidae belongs to the suborder Opisthothelae and the infraorder Mygalomorphae. Ctenizids are widely distributed, and mainly found across Asia (China, India, Japan, Laos, Myanmar, Sumatra, Thailand, Vietnam), the Americas (North and South America), the Mediterranean, South Africa and Australia (
Ctenizids were traditionally divided into two subfamilies based on morphological features, Ctenizinae and Ummidiinae (
The genus Conothele is represented by 20 species distributed in the Oriental and Australian regions. The taxonomic status of Conothele has been a matter of debate. The genus is closely related to Ummidia, from which it only differs by characters of uncertain generic significance (
In this study, four new Conothele species are diagnosed and described based on the morphology of female specimens collected from mainland China and Laos, where the genus had not been reported before. Although, ideally both male and female characters should be included in the description of new species, in trap-door spiders obtaining males is extremely difficult and indeed we were unable to obtain male Conothele specimens in this study. Direct collection by searching and digging burrows primarily results in either females or immature specimens. Males are short lived and leave the burrow immediately after the adult moult to search for females (
Specimens were examined under an Olympus SZX16 stereomicroscope, and photographed using an Olympus BX51 compound microscope. Genitalia were cleaned in boiling KOH for a few minutes to dissolve soft tissues. All the specimens were deposited at the Centre for Behavioural Ecology and Evolution (CBEE), College of Life Sciences, Hubei University, Wuhan, China. All measurements are in millimetres. Leg and palp measurements are given in the following order: total length (femur + patella + tibia + metatarsus + tarsus).
Abbreviations used are:
ALE anterior lateral eye
AME anterior median eye
PLE posterior lateral eye
PME posterior median eye
MOA median ocular area
PMS posterior median spinneret
PLS posterior lateral spinneret
Conothele malayana (Doleschall, 1859): 5, pl. 5, figure 8 (described female).
The genus Conothele can be distinguished from the genus Ummidia by their burrowing habits, the former constructs a short, parallel to the surface of ground, superficial burrow, whereas the latter digs a several centimeters long burrow in the soil (
Female (XUC-2014-062), Mt. Baiyun, Guangzhou City, Guangdong Province, China, 23.294°N, 113.484°E, 20 June 2014, collected by F.X. Liu, C. Xu and Z.T. Zhang. No male found.
‘Baiyun’ refers to the type locality of this species.
Female of C. baiyunensis sp. n. can be distinguished from other species of Conothele by the slightly globular lobes of spermathecae in the terminal part; stalks with sclerotized and inward-bent distal part; stalk terminal parts relatively short, simple and direct (Fig.
Total length, including chelicerae, 12.50; carapace 4.80 long, 4.40 wide; opisthosoma 6.70 long, 5.20 wide. Carapace black brown, glabrous, with a few slender setae on eye tubercle and its back (Fig.
Legs black brown, light-coloured ventrally, with long and short brown sparse setae, short thorn-like and normal spines. Tibia III with a saddle-like depression dorsally on the basal part (Fig.
Opisthosoma black, scattered with thick and slender black setae. Spinnerets brownish yellow, PMS one-segmented, 0.60 long, PMS-PMS 0.10; PLS three-segmented, 1.85 long, covered with brown spines, apical segment dome-shape (Fig.
Guangdong Province (Mt. Baiyun, Guangzhou), China.
Female (XUC-2014-002+), Minghua Village, Daxin Town, Chongzuo City, Guangxi Province, China, 23.320°N, 107.728°E, 22 December 2014, collected by D. Li, F.X. Liu and X. Xu. No male found.
‘Daxin’ refers to the type locality of this species.
Female of C. daxinensis sp. n. differs from other species of Conothele by the spermathecae with face to face, bowl-shape lobes (Fig.
Total length, including chelicerae, 10.40; carapace 4.00 long, 4.60 wide; opisthosoma 5.60 long, 4.90 wide. Carapace light brown, glabrous, with 3 slender setae on eye tubercle and 4 on its back (Fig.
Legs light brown, light-colored ventrally, with long and short brown sparse setae. All tarsi with tadpole-shaped trichobothrial hairs besides the normal ones. Basal part of tibia III with a saddle-like depression dorsally (Fig.
Opisthosoma black, scattered with thick and slender black setae. Spinnerets brownish, PMS one-segmented, 0.50 long, PMS-PMS 0.20; PLS three-segmented, 0.60 long, thicker and shorter (Fig.
Guangxi Province (Chongzuo), China.
Female (C-YN-005), Sidiechong, Mojiang County, Yunnan Province, China, 23.420°N, 101.676°E, 5 August 2013, collected by D. Li, F.X. Liu and X. Xu.
One female (C-YN-003) collected at Baka Village, Menglun Town, Mengla City, Xishuangbanna, Yunnan Province, China, 21.968°N, 101.210°E, 13 July 2013, collected by F.X. Liu and X. Xu. One female (C-Laos-001), Oudomxay Province, Laos PDR, 27 July 2013, collected by D. Li, F.X. Liu and X. Xu. No male found.
‘Sidiechong’ refers to the type locality of the holotype specimen of this species.
Female genitalia of C. sidiechongensis sp. n. resembles to C. taiwanensis (Tso, Haupt & Zhu, 2003), but can be distinguished from the latter by more or less upwards oriented bowl-shape lobes and stalk bent in zigzag pattern distally (Fig.
Total length, including chelicerae 25.50; carapace 9.00 long, 9.30 wide; opisthosoma 13.50 long, 10.80 wide. Carapace black brown, black on its margin; with 4 slender setae on eye tubercle and 5 on its back. Caput arched. Fovea deep, strongly procurved and U-shaped (Fig.
Legs black brown, light-coloured ventrally, with long and short brown sparse setae. All tarsi with tadpole-shaped trichobothrial hairs besides the normal ones. Tibia III with a saddle-like depression dorsally (Fig.
Opisthosoma black, scattered with thick and slender black setae. Spinnerets brownish, PMS one-segmented, 1.20 long, PMS-PMS 0.10; PLS three-segmented, 2.50 long, thicker, covered with brown spines, apical segment dome-shape (Fig.
Yunnan Province (Mojiang, Mengla), China; Oudomxay Province, Laos.
Female (XUC-2014-001+), Mt. Yunding, Tengchong City, Yunnan Province, China, 25.805°N, 98.800°E, 16 December 2014, collected by D. Li, F.X. Liu and X. Xu. No male found.
‘Yunding’ refers to the type locality of this species.
Female of C. yundingensis sp. n. can be distinguished from C. daxinensis sp. n. by the slightly upwards and globular lobes terminally (Fig.
Total length, including chelicerae 18.30; carapace 7.00 long, 6.80 wide; opisthosoma 9.10 long, 7.90 wide. Carapace black brown, black on its margin; with 9 slender setae on eye tubercle and 3 on its back (Fig.
Legs black brown, light-coloured ventrally, with long and short brown sparse setae. All tarsi with tadpole-shaped trichobothrial hairs besides the normal ones. Tibia III with a saddle-like depression dorsally (Fig.
Opisthosoma black, scattered with thick and slender black setae. Spinnerets brownish, PMS one-segmented, 0.40 long, PMS-PMS 0.15; PLS three-segmented, 2.00 long, thicker, covered with brown spines, apical segment dome-shape (Fig.
Yunnan Province (Mt. Yunding, Tengchong), China.
This study was supported by the grants from the National Natural Sciences Foundation of China (NSFC) (31601850; 31272324) and the Singapore Ministry of Education AcRF Tier 1 grant (R-154-000-638-112). We thank Danielle Klomp, Yixin Li, Hirotsugu Ono and Vera Opatova for their helpful suggestions to improve the manuscript, and also thank the staff of the Centre for Behavioural Ecology and Evolution (CBEE, Hubei University) for all their help and support throughout this study.