Research Article |
Corresponding author: Ji-Gang Jiang ( jjgangnanjing@163.com ) Academic editor: Louis Deharveng
© 2018 Ji-Gang Jiang, Wen-Bin Wang, Hu Xia.
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:
Jiang J-G, Wang W-B, Xia H (2018) Two new species of Lobellini from Tianmu Mountain, China (Collembola, Neanuridae). ZooKeys 726: 1-14. https://doi.org/10.3897/zookeys.726.11934
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Three species of the subfamily Neanurinae (Collembola: Neanuridae) are recorded from Tianmu Mountain, Zhejiang Province, east China. Two of them, Lobellina fusa sp. n. and Paralobella tianmuna sp. n., are new to science and described in this paper. Lobellina fusa sp. n. can be recognized by the presence of six teeth on mandible and the fusion of dorsointernal tubercles on the head. Paralobella tianmuna sp. n. is characterized by a mandible with seven teeth, the lateral tubercle of Abd. II–III respectively with 7 (6+s) chaetae. Crossodonthina bidentata Luo & Chen, 2009 is widely distributed in the mountain from 300 to 1500 m a.s.l.
Crossodonthina bidentata , Lobellina fusa sp. n., Paralobella tianmuna sp. n., Neanurinae , taxonomy
To date, on a worldwide scale, the tribe Lobellini consists of 17 genera (including two subgenera) and approximately 157 species mainly from South-East Asia and the Australian-Oceania region (
Tianmu Mountain, located in Lingan City, Zhejiang Province, east China, covers an area of 4300 hectares. The elevation of the highest peak of the mountain is more than 1500 meters. It belongs to the subtropical humid monsoon climate zone. The flora is a typical subtropical evergreen broad-leaved forest. One of the main targets of the Zhejiang Tianmu Mountain National Nature Reserve is the protection of rare and endangered plants, such as Ginkgo biloba, Cercidiphyllum japonicum, and Liriodendron chinensis. Till now, more than 4000 species (including 657 type species) of insects were reported from the mountain (
The terminology and layout of the tables used in this paper follow
General morphology:
Abd abdomen,
Ant antenna,
Cx coxa,
Fe femur,
Scx2 subcoxa 2,
Ti tibiotarsus,
Th thorax,
Tr trochanter,
VT ventral tube.
Groups of Chaetae:
Ag antegenital,
An anal,
Fu furcal,
Ve ventroexternal,
Vi ventrointernal,
Vl ventrolateral,
De dorsoexternal,
Di dorsointernal,
Dl dorsolateral,
L lateral,
Oc ocular,
So subocular.
Tubercles:
An antennal,
Fr frontal,
Cl clypeal,
Types of chaetae:
Ml long macrochaeta,
Mc short macrochaeta,
Mcc very short macrochaeta,
me mesochaeta,
mi microchaeta,
i microchaeta,
ms s-microchaeta,
s s-chaeta,
or organite of Ant. IV,
i small ordinary chaeta on Ant. IV,
mou thin cylindrical chaetae on Ant. IV (“soies mousses”),
x labial papilla x.
All specimens were collected with the aid of Tullgren funnels or aspirators, and preserved in 95% ethanol. They were cleared in Nesbitt’s fluid and mounted on slides in Hoyer’s medium. Preparations were dried for 7–10 days in oven at 55 °C, and then ringed with lacquer. The morphological characters were observed and figures were drawn using a phase contrast microscope Nikon 80i. Material is deposited in the Key Laboratory of Zoology, Hunan University of Arts and Science, Changde, Hunan Province, China.
Three males and two females, on the path from Qili Pavilion to Longfengjian, Tianmu Mountain, Zhejiang Province, China. Coordinates: 30°20'36"N, 119°26'17"E, 800–1050 m a.s.l., 26 July 2011, leg. Ji-Gang Jiang (collection number: J2011072601). Ten males and eight females, Zhonglie Temple, Tianmu Mountain, Zhejiang Province. Coordinates: 30°23'03"N, 119°26'20"E, 300–400 m a.s.l., 24 July 2011, leg. Ji-Gang Jiang (collection number: J2011072401). Four males and two females, in bamboo forest, Hengwu, Tianmu Mountain, Zhejiang Province. Coordinates: 30°19'01"N, 119°26'15"E, 400–500 m a.s.l., 27 July 2011, leg. Ji-Gang Jiang (collection number: J2011072703.
Eyes 2+2. Labrum truncate and chaetal formula as 2/5, 2. Mandible consisting of two basal teeth and three rami. Chaeta O of cephalic tubercle Fr present. Body macrochaeta acuminate and ciliate. Formula of dorsal sensilla on thorax and abdomen as 0, 2+ms, 2/1, 1, 1, 1, 1, 0. Unguis with one inner tooth and no lateral teeth. Unguiculus absent. Di tubercles on Abd. V fused on the axis.
Crossodonthina bidentata is widely distributed in the mountain from 300 to 1500 m, living in decayed leaves of woody plants as well as bamboo.
Holotype male on slide, on the path from Longfengjian to Fairy Peak, Tianmu Mountain, Zhejiang Province, China. Coordinates: 30°23'11"N, 119°26'07"E, 1100–1500 m a.s.l., 25 July 2011, leg. Ji-Gang Jiang (Housed in Hunan University of Arts and Science, J2011072501). Paratypes: three females and two males, same data as holotype (Housed in Hunan University of Arts and Science, J2011072501).
The species name refers to the fused Di tubercles on head.
Habitus typical of the genus Lobellina. Body dorsal tubercles well developed. Cephalic Di tubercles fused. Chaeta O of tubercle Fr present. 3+3 black eyes. Labrum chaetotaxy as 0/2, 2. Mandible with six teeth. Maxilla consisting of two crochet-like lamellae and two teeth. Chaetae formula of tubercle Di on Th. I–Abd. V as 1, 3, 3/2, 2, 2, 2, 3. S-chaetae and s-microchaeta formula on Th. I–Abd. V as 0, 2+ms, 2/1, 1, 1, 1, 1. Ventral tube with 4+4 chaetae, furcular vestige with 3 chaetae. Unguis with an inner tooth and without lateral tooth.
Body length 2.2–3.7 mm. Body color red while alive and white in alcohol.
Head: eyes 3+3, black (Fig.
Thoracic and abdominal tubercles and chaetotaxy shown in Figs
Appendages: Unguis with an inner tooth and without lateral tooth (Fig.
Under leaves in forest.
The taxon Lobellina was erected by Yosii in 1956 as a subgenus of the genus Lobella Börner, 1906. It was raised to generic status by
To date, 12 valid species are known in the genus Lobellina (
1 | Cephalic chaeta O present | 2 |
– | Cephalic chaeta O absent | 5 |
2 | Body macrochaetae smooth | 3 |
– | Body macrochaetae serrate | 4 |
3 | Maxilla with 2 separate lamella and 3 teeth | L. montana Deharveng & Weiner, 1984 (Korea) |
– | Maxilla with 2 fused lamella and 2 teeth | L. paraminuta Deharveng & Weiner, 1984 (Korea) |
4 | Body color yellow, mandible with 7 teeth, tubercle Oc with 2 chaetae, ventral tube with 5+5 chaetae, cephalic tubercle Di separate | L. nanjingensis Ma & Chen, 2008 (China) |
– | Body color red, mandible with 6 teeth, tubercle Oc with 3 chaetae, ventral tube with 4+4 chaetae, cephalic tubercle Di fused | L. fusa sp. n. |
5 | Body macrochaetae smooth | 6 |
– | Body macrochaetae serrate | 10 |
6 | Cephalic tubercle Oc with 3 chaetae | 7 |
– | Cephalic tubercle Oc with 2 chaetae | 8 |
7 | Abd. V with 2+2 dorsal tubercles | L. chosonica Deharveng & Weiner, 1984 (Korea) |
– | Abd. V with 3+3 dorsal tubercles | L. proxima Deharveng & Weiner, 1984 (Korea) |
8 | Tubercle Di on Abd. V with 2 chaetae | 9 |
– | Tubercle Di on Abd. V with 3 chaetae | L. minuta (Lee, 1980) (Korea) |
9 | Mandible with 3 teeth | L. ipohensis (Yosii, 1976) (Malaysia) |
– | Mandible with 8 teeth | L. musangensis (Yosii, 1976) (Malaysia) |
10 | Cephalic tubercle Oc with 2 chaetae | 11 |
– | Cephalic tubercle Oc with 3 chaetae | 12 |
11 | Abd. V with 2+2 dorsal tubercles | L. ionescui (Massoud & Gruia, 1974) (Cuba) |
– | Abd. V with 3+3 dorsal tubercles | L. perfusionides (Stach, 1965) (Vietnam) |
12 | Abd. V with 3+3 dorsal tubercles | L. kitazawai (Yosii, 1969) (Japan) |
– | Abd. V with 2+2 dorsal tubercles | L. roseola (Yosii, 1954) (Japan) |
Holotype, female, 3.0 mm. Chanyuan Temple, Tianmu Mountain, Zhejiang Province. Coordinates: 30°19'40"N, 119°26'15"E, ca. 390 m a.s.l., 30 July 2011, leg. Ji-Gang Jiang (Housed in Hunan University of Arts and Science, J2011073001). Paratypes: two males, three females and two juveniles, same data as holotype (Housed in Hunan University of Arts and Science, J2011073001); one female, Hengwu, Tianmu Mountain, Zhejiang Province. 30°19'41"N, 119°26'14"E, 400–500 m a.s.l., 27 July 2011, leg. Ji-Gang Jiang (Housed in Hunan University of Arts and Science, J2011072704).
The new species is named after the type locality, Tianmu Mountain.
Habitus typical of the genus Paralobella. Dorsal tubercles round or oval and well developed. 3+3 unpigmented eyes. Labrum round, chaetotaxy as 0/ 2, 2. Mandible with seven teeth. Maxilla nearly styliform, apex with two hook-like teeth. Cephalic tubercle Fr with chaeta O. Tubercle An with four chaetae, chaetae C and D free from the tubercle. Tubercle Oc with three chaetae. Cephalic tubercle Di, De, Dl respectively with 1, 3, 4 chaetae. Tubercle De of Th. II-III each with four (3+s) chaetae. Unguis with an inner tooth, and without lateral tooth. VT with 4+4 chaetae. Furcular vestige with three chaetae and no microchaetae.
Body length: male 2.0–2.5 mm; female 2.1–3.5 mm. Body entirely red while alive and white in alcohol.
Head: Eyes 3+3 without pigment (Fig.
Body tubercles round or oval (Fig.
Appendages: Unguis with an inner tooth, and without lateral tooth (fig. 15). VT with 4+4 chaetae. Furcular vestige with three chaetae and no microchaetae.
At present, 12 species belong to the genus Paralobella, all from Asia (
1 | Chaeta O of tubercle Fr absent | 2 |
– | Chaeta O of tubercle Fr present | 6 |
2 | Tubercle Dl of Th. II–III with 5 (4+s) chaetae (besides of ms) | P. erawan (Thailand) |
– | Tubercle Dl of Th. II–III with 4 (3+s) chaetae (besides of ms) | 3 |
3 | Tubercle Di of Th. II–III only with 1 chaeta, tubercle Oc on head only with Ocm chaeta | P. selangorica (Malaysia) |
– | Tubercle Di of Th. II–III with 2–3 chaetae, tubercle Oc on head with 2–3 chaetae | 4 |
4 | Tubercle Di of Th. II–III with 2 chaetae | P. penangensis (Malaysia) |
– | Tubercle Di of Th. II–III with 3 chaetae | 5 |
5 | Abd. I–III: tubercle De with 5 (4+s) chaetae, tubercle Dl with 3 chaetae; mandible complicated, totally with 16 teeth in two rows | P. apsala (Thailand) |
– | Abd. I–III: tubercle De with 4 (3+s) chaetae, tubercle Dl with 2 chaetae; mandible relatively simple, with 5 or 6 teeth in one row | P. kinabaluensis (Malaysia) |
6 | Tubercle De of Th. II–III with 4 (s+3) chaetae, VT with 3+3 chaetae | P. sabahna (Malaysia) |
– | Tubercle De of Th. II–III with 5 (s+4) chaetae, VT with 4(5)+4(5) chaetae | 7 |
7 | Tubercle Di, De, DL of Th. I respectively with 2, 2, 1 chaetae | 8 |
– | Tubercle Di, De, DL of Th. I respectively with 1, 2, 1 chaetae | 9 |
8 | Tubercle Dl of Th. II–III with 4 (3+s) chaetae, tubercle Dl of Abd. IV with 6 (5+s) chaetae | P. khaochongensis (Thailand) |
– | Tubercle Dl of Th. II–III with 5 (4+s) chaetae, tubercle Dl of Abd. IV with 3 (2+s) chaetae | P. paraperfusa (Philippines) |
9 | Tubercle De and Dl of Abd. V fused, body tricolour | P. orousseti (Philippines) |
– | Tubercle De and Dl of Abd. V separate, body red color | 10 |
10 | Mandible with 20 teeth | P. palustris (China) |
– | Mandible with less than 8 teeth | 11 |
11 | Mandible with 6 teeth, tubercle L of Abd. II-III with 6 (5+s) chaetae | P. breviseta (China) |
– | Mandible with 7 teeth, tubercle L of Abd. II-III with 4 (3+s) or 7 (6+s) chaetae | 12 |
12 | Tubercle Di of Th. II–III with 2 chaetae, tubercle L of Abd. II-III with 4 (3+s) chaetae, mandibular basal tooth much larger than the second tooth | P. perfusa (Indochina) |
– | Tubercle Di of Th. II–III with 3 chaetae, tubercle L of Abd. II-III with 7 (6+s) chaetae, mandibular basal tooth slightly larger than the second one | P. tianmuna sp. n. |
The project was supported by the Construct Program of the Key Discipline in Hunan Province (Zoology); the Zoology Key Laboratory of Hunan Higher Education, Hunan University of Arts and Science; the Open Fund Project of Innovation Platform for University of Hunan Province (No. 14k065); the Natural Science Fund of Hunan Province (No. 2016JJ2091) and the Science Research Fund of Hunan University of Arts and Science (13ZD05). Sincere thanks are owed to Louis Deharveng (MNHN, Paris) and the two reviewers for their kind help and constructive suggestions.
Tubercle | Number and type of chaeta | Names of chaeta |
---|---|---|
Cl | 2 Ml | F |
2 Mcc | G | |
An | 2 Ml2 mi | B, EC, D |
Fr | 2 Ml1 mc | AO |
Oc | 2 Ml1 mi | Oca, OcmOcp |
Di+Di | 1+1 Ml | Di1 |
De | 1 Ml+1 Mc1 mi | De1, De2De3 |
Dl | 2 Ml3 mi | Dl1, Dl5Dl2, Dl3, Dl6 |
L | 1 Ml1 Mc | L1Dl4 |
So | 2 Ml+6 me5 me | uncertain |
Terga | Legs | ||||||||
Di | De | Dl | L | Scx2 | Cx | Tr | Fe | T | |
Th.I | 1 | 2 | 1 | – | 0 | 3 | 6 | 12 | 19 |
Th.II | 3 | 4+s | 3+s+ms | 3 | 2 | 6 | 7 | 9 | 19 |
Th.III | 3 | 4+s | 3+s | 3 | 2 | 8 | 6 | 10 | 18 |
Terga | sterna | ||||||||
Abd. I | 2 | 3+ s | 2 | 4 | VT | 4 | |||
Abd. II | 2 | 3+ s | 2 | 5 | Ve | 2(4) | Vl | – | |
Abd. III | 2 | 3+ s | 2 | 5 | Ve | 3 | Fu | 3 | |
Abd. IV | 2 | 2+ s | 3 | 7 | Ve | 7 | Vl | 5 | |
Abd. V | 3 | s | 4 | Ag | 3 | Vl | 1 | ||
Abd. VI | 7 | Ve | 14 | Ve | 5 |
Tubercle | Number and type of chaeta | Names of chaeta |
---|---|---|
Cl | 2 Mc | F |
2 Mcc | G | |
An | 1 Mc | B |
1 Mcc | E | |
2 me | C, D | |
Fr | 2 Mc | A |
1 Mcc | O | |
Oc | 1Ml | Ocm |
2 me | Oca, Ocp | |
Di | 1 Ml | Di1 |
De | 1 Ml | De1 |
2 me | De2, De3 | |
Dl | 1 Mc | Dl1, |
3 me | Dl3,Dl5, Dl6 | |
L | 2 Mc | L1, L4 |
1 me | L3 | |
So | 2 Mc | uncertain |
8 me |
Terga | Legs | |||||||||
---|---|---|---|---|---|---|---|---|---|---|
Di | De | Dl | L | Scx2 | Cx | Tr | Fe | T | ||
Th.I | 1 | 2 | 1 | – | 0 | 3 | 6 | 13 | 19 | |
Th.II | 3 | 4+s | 4+s+ms | 3 | 2 | 7 | 6 | 12 | 19 | |
Th.III | 3 | 4+s | 4+s | 3 | 2 | 8 | 6 | 11 | 18 | |
Terga | sterna | |||||||||
Abd. I | 2 | 3+ s | 2 | 6+s | VT | 4 | ||||
Abd. II | 2 | 3+ s | 2 | 6+s | Ve | 4 | Vl | – | ||
Abd. III | 2 | 3+ s | 2 | 6+s | Ve | 4 | Fu | 3 | ||
Abd. IV | 2 | 2+ s | 3 | 7+s | Ve | 7(8) | Vl | 5 | ||
Abd. V | 3 | s | 4 | Ag | 3 | Vl | 2 | |||
Abd. VI | 7 | Ve | 14 | Ve | 6 |