Amauropelma yunnan Yao & Li, 2022

Chu, Chang, Lu, Ying, Yao, Zhiyuan & Li, Shuqiang, 2022, A survey of ctenid spiders (Araneae, Ctenidae) from Xishuangbanna Tropical Botanical Garden, Yunnan, China, Biodiversity Data Journal 10, pp. 87597-87597 : 87597

Amauropelma yunnan Yao & Li sp. n.

Materials

Type status: Holotype. Occurrence: recordedBy: Guo Zheng ; individualCount: 1; sex: male; lifeStage: adult; Taxon : order: Araneae ; family: Ctenidae ; genus: Amauropelma ; Location : country: China; stateProvince: Yunnan; municipality: Xishuangbanna ; locality: Mengla County ; verbatimLocality: Menglun Town , Xishuangbanna Tropical Botanical Garden , Paramichelia baillonii plantation (about 20 yr.); verbatimElevation: 608 ± 11 m a.s.l.; verbatimLatitude: 21°54.200'N; verbatimLongitude: 101°16.923'E; Event: samplingProtocol: pitfall traps; year: 2007; month: 3; day: 1-15; Record Level: institutionCode: IZCAS-Ar 43141 Type status: Paratype. Occurrence: recordedBy: Guo Zheng ; individualCount: 1; sex: male; lifeStage: adult; Taxon : order: Araneae ; family: Ctenidae ; genus: Amauropelma ; Location : country: China; stateProvince: Yunnan; municipality: Xishuangbanna ; locality: Mengla County ; verbatimLocality: Menglun Town , Xishuangbanna Tropical Botanical Garden , Rubber plantation (about 20 yr.); verbatimElevation: 586 ± 9 m a.s.l.; verbatimLatitude: 21°54.498'N; verbatimLongitude: 101°16.326'E; Event: samplingProtocol: pitfall traps; year: 2007; month: 2; day: 16-28; Record Level: institutionCode: IZCAS-Ar 43142 Type status: Paratype. Occurrence: recordedBy: Guo Zheng ; individualCount: 1; sex: male; lifeStage: adult; Taxon : order: Araneae ; family: Ctenidae ; genus: Amauropelma ; Location : country: China; stateProvince: Yunnan; municipality: Xishuangbanna ; locality: Mengla County ; verbatimLocality: Menglun Town , Xishuangbanna Tropical Botanical Garden , Rubber plantation (about 20 yr.); verbatimElevation: 586 ± 9 m a.s.l.; verbatimLatitude: 21°54.498'N; verbatimLongitude: 101°16.326'E; Event: samplingProtocol: pitfall traps; year: 2007; month: 3; day: 1-15; Record Level: institutionCode: IZCAS-Ar 43143 Type status: Paratype. Occurrence: recordedBy: Guo Zheng ; individualCount: 1; sex: female; lifeStage: adult; Taxon : order: Araneae ; family: Ctenidae ; genus: Amauropelma ; Location : country: China; stateProvince: Yunnan; municipality: Xishuangbanna ; locality: Mengla County ; verbatimLocality: Menglun Town , Xishuangbanna Tropical Botanical Garden , Rubber-Tea plantation (about 20 yr.); verbatimElevation: 569 ± 11 m a.s.l.; verbatimLatitude: 21°54.463'N; verbatimLongitude: 101°15.978'E; Event: samplingProtocol: pitfall traps; year: 2007; month: 3; day: 16-31; Record Level: institutionCode: IZCAS-Ar 43144 Type status: Paratype. Occurrence: recordedBy: Guo Zheng ; individualCount: 1; sex: female; lifeStage: adult; Taxon : order: Araneae ; family: Ctenidae ; genus: Amauropelma ; Location : country: China; stateProvince: Yunnan; municipality: Xishuangbanna ; locality: Mengla County ; verbatimLocality: Menglun Town , Xishuangbanna Tropical Botanical Garden , Paramichelia baillonii plantation (about 20 yr.); verbatimElevation: 556 ± 11 m a.s.l.; verbatimLatitude: 21°54.772'N; verbatimLongitude: 101°16.043'E; Event: samplingProtocol: pitfall traps; year: 2007; month: 4; day: 16-30; Record Level: institutionCode: IZCAS-Ar 43145 Type status: Paratype. Occurrence: recordedBy: Guo Zheng ; individualCount: 1; sex: female; lifeStage: adult; Taxon : order: Araneae ; family: Ctenidae ; genus: Amauropelma ; Location : country: China; stateProvince: Yunnan; municipality: Xishuangbanna ; locality: Mengla County ; verbatimLocality: Menglun Town , Xishuangbanna Tropical Botanical Garden , Rubber-Tea plantation (about 20 yr.); verbatimElevation: 561 ± 9 m a.s.l.; verbatimLatitude: 21°55.551'N; verbatimLongitude: 101°16.923'E; Event: samplingProtocol: pitfall traps; year: 2007; month: 4; day: 16-30; Record Level: institutionCode: IZCAS-Ar 43146

Description

Male (IZCAS-Ar 43141): PL 2.4, PW 2.1, AW 0.8, OL 2.3, OW 1.5. Eye diameters and interdistances: AME 0.05, ALE 0.07, PME 0.06, PLE 0.04, AME-AME 0.04, AME-ALE 0.05, PME-PME 0.08, PME-PLE 0.12, AME-PME 0.07, ALE-PLE 0.06, clypeus AME 0.04, clypeus ALE 0.06. Palp and leg measurements: palp 2.7 (0.8, 0.4, 0.4, -, 1.1), I 6.4 (1.6, 0.9, 1.8, 1.3, 0.8), II 5.3 (1.5, 0.8, 1.2, 1.1, 0.7), III 5.0 (1.4, 0.8, 1.0, 1.1, 0.7), IV 7.2 (1.7, 0.9, 1.7, 1.9, 1.0). Leg formula 4123. Spination of palp and legs: palp 130, 000, 1010; femora I p012, d122, II p012, d111, r011, III p012, d111, r012, IV p002, d111, r112; patellae I-II 000, III-IV 001; tibiae I p010, r010, v22222, II p010, r010, v22222, III p111, d111, r111, v222, IV p111, d111, r111, v222; metatarsi I p010, r010, v222, II p010, r010, v222, III p112, d010, r112, v222, IV p112, d010, r122, v322. Chelicerae with 3 promarginal, 4 + 1 retromarginal teeth, without denticles. Retromargin of chelicerae close to fang base with 1 bristle. Tarsi and metatarsi without scopula. Claw tufts arising separately, but intermingled distally. Leg claws I with 3(2) and II with 3(1) secondary teeth. Position of tarsal organ: I 0.66, II 0.54, III 0.49, IV 0.75.

Palp (Fig. 2 A-C). Patella with distinct retrolateral apophysis. RTA protruding at an almost right angle from tibia in ventral view, with two short apices, both dorso-distal. Cymbium tip slightly conical, prolatero-proximally with distinct extension. Embolus arising in a 6.30- o’clock-position from tegulum, with a distinct membranous seam. Conductor arising in a 12- o’clock-position from tegulum, bending retrolaterally. Tegular apophysis situated subcentrally on tegulum, moderately excavated at its dorsal side.

Colour (Fig. 3 C and D). Yellowish-brown. Dorsal prosoma with eyes marked with black rings, faint radial markings, appearing as indistinct longitudinal bands, narrow dark margin indistinct, fovea distinct, reddish-brown. Chelicerae same colour as dorsal prosoma. Sternum, labium, gnathocoxae, ventral coxae yellowish-brown without pattern. Legs yellowish-brown. Dorsal and lateral opisthosoma yellowish with patches. Ventral opisthosoma yellowish without pattern, except for around spinnerets.

Female (IZCAS-Ar 43144): PL 2.4, PW 1.8, AW 1.0, OL 2.5, OW 1.6. Eye diameters and interdistances: AME 0.06, ALE 0.11, PME 0.06, PLE 0.05, AME-AME 0.06, AME-ALE 0.07, PME-PME 0.10, PME-PLE 0.17, AME-PME 0.06, ALE-PLE 0.09, clypeus AME 0.04, clypeus ALE 0.08. Palp and leg measurements: palp 2.4 (0.8, 0.4, 0.5, -, 0.7), I 6.0 (1.7, 0.9, 1.5, 1.2, 0.7), II 5.6 (1.5, 0.9, 1.3, 1.2, 0.7), III 5.0 (1.4, 0.7, 1.1, 1.1, 0.7), IV 7.8 (2.0, 0.9, 1.8, 2.0, 1.1). Leg formula 4123. Spination of palp and legs: palp 130, 100, 221, 322; femora I p010, d111, II p111, d133, III p011, d111, r011, IV p001, d212, r001; patellae I-II 000, III-IV 100; tibiae I-II v22222, III p11, d111, r11, v222, IV p111, d111, r111, v322; metatarsi I-II v222, III p112, d010, r112, v222, IV p112, d010, r112, v222. Chelicerae with 3 promarginal, 4 retromarginal teeth, without denticle. Retromargin of chelicerae close to fang base with 1 bristle. Tarsi and metatarsi without scopula. Claw tufts arising separately, but intermingled distally. Palpal claw with 4 secondary teeth, leg claws I with 3, II with 2 and IV with 1 secondary teeth. Position of tarsal organ: I 0.58, II 0.54, III 0.50, IV 0.76.

Copulatory organ (Fig. 3 A and B). Epigynal field with two slit sense organs anterior to epigynal plate. Epigynal plate width/length: 9.6/4.9, 9.8/4.7; anterior width/posterior width: 9.6/3.1, 9.8/3.4; posterior part with distinct concave lateral margins. Distal part of lateral teeth posteriorad. Internal duct system with round spermathecae fully visible, separated from each other by more than their diameter; fertilisation ducts laminar, mediad.

Colour (Fig. 3 E and F). As in male, except for: chelicerae reddish-brown. Dorsal, lateral and ventral opisthosoma yellowish without pattern.

Variation: Males (IZCAS-Ar 43142, Ar 43143): PL 2.4-2.7, OL 2.3-2.7. Females (IZCAS-Ar 43145, Ar 43146): PL 1.9-2.2, OL 2.3-2.4.

Diagnosis

Small Ctenidae (total length male 4.7-5.4, female 4.2-4.9). The species resembles A. staschi Jäger, 2012 (see Jäger 2012: figs. 187-192) by having similar male tegular apophysis, tegulum and RTA (Fig. 2 A-C), but can be easily distinguished by the embolus arising in a 6.30- o’clock-position from tegulum (Fig. 2 B; 9- o’clock-position in A. staschi ), by the conductor arising in a 12- o’clock-position from tegulum (Fig. 2 B; 1 to 1.30- o’clock-position in A. staschi ), by the tegulum with sclerotised, triangular distal apophysis (Fig. 2 B; absent in A. staschi ) and by the patella of palp with distinct retrolateral apophysis (Fig. 2 B; without distinct apophysis, retrolateral side slightly swollen in A. staschi ).

Etymology

The specific name refers to the type locality and is a noun in apposition.

Distribution

China (Yunnan, type locality; Fig. 1 ).

Figures

Figure 1. Distribution records of new and newly-recorded ctenid species from Xishuangbanna Tropical Botanical Garden in Yunnan Province, China. 1. Amauropelma yunnan sp. nov.; 2. Ctenus banna sp. nov.; 3. C. robustus Thorell, 1897; 4. C. yulin sp. nov.

Figure 2. Amauropelma yunnan sp. nov., holotype male. A Palp, prolateral view; B Palp, ventral view; C Palp, retrolateral view. C = conductor, E = embolus, PCB = prolateral cymbial bulge, RPA = retrolateral patellar apophysis, RTA = retrolateral tibial apophysis, TA = tegular apophysis. Scale bar: 0.20 mm (A-C).

Figure 3. Amauropelma yunnan sp. nov. A Paratype female, epigyne, ventral view; B Paratype female, vulva, dorsal view; C Holotype male, habitus, dorsal view; D Holotype male, habitus, ventral view; E Paratype female, habitus, dorsal view; F Paratype female, habitus, ventral view. ET = epigynal teeth, FD = fertilisation duct, IF = internal fold, SP = spermathecae, SS = slit sensillum. Scale bars: 0.20 mm (A, B), 1.00 mm (C-F).