Trilacuna qingliangfeng Ma & Tong, 2024

Ma, Jimeng, Chen, Qiang & Tong, Yanfeng, 2024, Four new species of the genus Trilacuna Tong & Li, 2007 (Araneae, Oonopidae) from China, ZooKeys 1219, pp. 331-346 : 331-346

Trilacuna qingliangfeng Ma & Tong sp. nov.

Figs 3 , 4 , 5 , 6 A, B, D

Material examined.

Holotype: China • ♂ ( SYNU-1181 ); Anhui Province, Xuancheng City, Jixi County, Qingliangfeng National Nature Reserve, Zhanlingwan ; 30°5'53"N, 118°51'59"E; 8. VI. 2014; F. Zhang leg.

Paratypes: China • 2 ♂ 8 ♀ ( SYNU-1182 –1191); same data as holotype • 4 ♂ 6 ♀ ( SYNU-1207 –1216); same data as holotype; 28. VIII. 2014 • 1 ♂ 8 ♀ ( SYNU-1217 –1225); Qingliangfeng National Nature Reserve, Lantianao ; 30°8'2"N, 118°49'42"E; 29. V. 2014; F. Zhang leg. • 1 ♀ ( SYNU-1227 ); Qingliangfeng National Nature Reserve, Yezhutan ; 30°7'10"N, 118°51'10"E; 30. V. 2014; F. Zhang leg. • 1 ♂ 9 ♀ ( SYNU-1228 –1237); Qingliangfeng National Nature Reserve, Fuling Town, Yonglai Village ; 30°9'8"N, 118°51'3"E; 5. VI. 2013; Cha and Zhang leg. • 1 ♂ 4 ♀ ( SYNU-1202 –1206); Qingliangfeng National Nature Reserve, Fuling Town, Yonglai Village ; 30°9'8"N, 118°51'3"E; 3. VI. 2013; Cha and Zhang leg. • 2 ♂ 1 ♀ ( SYNU-1240 –1242); Qingliangfeng National Nature Reserve, Fuling Town, Yonglai Village, Qingliangfeng Protection Station ; 30°2'32"N, 118°50'27"E; 4. VI. 2013; Cha and Zhang leg. • 2 ♀ ( SYNU-1238 –1239); Qingliangfeng National Nature Reserve, Fuling Town, Yonglai Village, Huihanggudao ; 30°7'57"N, 118°48'17"E; 2. VII. 2013; Cha and Zhang leg. • 3 ♀ ( SYNU-1199 –1201); Qingliangfeng National Nature Reserve, Shexian County, Zhupu ; 29°50'51"N, 118°25'49"E; 6. VI. 2013; Cha and Zhang leg.

Other materials.

China • 1 ♂ 3 ♀ ( SYNU-536 ); Anhui Province, Huangshan City, Xiuning County, Qiyun Mountain ; 29°48'23"N, 118°2'24"E; 19. IV. 2011; Zongxu Li and Luyu Wang leg. • 1 ♂ 1 ♀ ( SYNU-537 ); same data as above • 2 ♀ ( SYNU-538 ); same data as above • 1 ♀ ( SYNU-1226 ); Anhui Province, Xiuning County, Lingnan Town, Dawu ; 29°25'22"N, 118°8'12"E; 4. VI. 2014; F. Zhang leg. • 7 ♀ ( SYNU-1192 –1198); Zhejiang Province, Tianmushan Mountain, Chanyuan Temple ; 30°13'50"N, 119°26'55"E; 10. VI. 2014; F. Zhang leg. • 1 ♂ ( SYNU-1243 ); Zhejiang, Tianmushan Mountain, Qianmutian ; 30°23'30"N, 119°26'54"E; 10. VI. 2014; F. Zhang leg.

Etymology.

The specific name is a noun in apposition taken from the type locality.

Diagnosis.

The new species is similar to Trilacuna wenfeng Tong & Li, 2021 , but can be distinguished by the slightly elevated epigastric region and a group of strong setae behind the level between posterior spiracles (Fig. 3 C, H ) vs strongly elevated, with a cluster of densely short setae in front of the level between posterior spiracles ( Wang et al. 2021: fig. 6 E, G, H), by the ridges on central area of sternum (Fig. 3 E ) vs lacking ( Wang et al. 2021: fig. 6 D), and by the small globular structure of endogyne (Fig. 6 B ) vs spiral-shaped ( Wang et al. 2021: fig. 5 D).

Description.

Male (Holotype). Body: yellow, legs lighter; habitus as in Fig. 3 A – C ; body length 1.63. Carapace: 0.78 long, 0.63 wide; sides granulate, lateral margin rebordered (Fig. 3 D ). Eyes: nearly equal sized; posterior eye row recurved from above, procurved from front; ALE separated from edge of carapace by 1.3 diameters (Fig. 3 D, G ). Mouthparts: chelicerae straight; labium rectangular, anterior margin deeply incised; endites slender, distally branched (Figs 3 E , 6 D ). Sternum: surface finely smooth, with several ridges on central area (Fig. 3 E ). Abdomen: 0.91 long, 0.57 wide; booklung covers ovoid, surface smooth; sperm pore situated at level of anterior spiracles; apodemes present, posterior spiracles not connected by groove; epigastric region slightly elevated, with a group of strong setae (Fig. 3 C, H ). Leg spination: legs I-II: tibia: v 2-2 - 2 - 2 - 0, metatarsus: v 2-2 - 0. Palp: orange; 0.55 long (0.18, 0.11, 0.10, 0.16); femur elongated (width / length = 0.57); bulb kidney-shaped, basally strongly bulged; embolus system with ear-shaped projection (bep) at base, with a lateral curved branch (lcb) and narrow medial branch (mb) (Fig. 4 A – L ).

Female (paratype, SYNU-1184 ). As in male except as noted. Body: habitus as in Fig. 5 A – C ; body length 1.98. Carapace: 0.82 long, 0.66 wide. Mouthparts: endites unmodified. Sternum: without ridges on central area (Fig. 5 E ). Abdomen: 1.24 long, 0.71 wide. Epigastric area: with recurved, strongly sclerotized arches (sar) (Figs 5 H , 6 A ). Endogyne: with narrow, transversally elongated sclerite (tsc); with an anterior T-shaped sclerite (as) and a posterior small globular structure (glo) (Fig. 6 B ).

Distribution.

Known only from the type locality (Fig. 11 ).

Figures

Figure 3. Trilacuna qingliangfeng sp. nov., male holotype A – C habitus in dorsal, ventral and lateral views D – G prosoma in dorsal, ventral, lateral and anterior views, arrow shows the small ridges H abdomen, ventral view, arrow shows the clustered setae. Scale bars: 0.4 mm (A – H).

Figure 4. Trilacuna qingliangfeng sp. nov., left male palp, A – F (light) and G – L (SEM) A, G prolateral view B, H dorsal view C, I retrolateral view D, J distal part of palpal bulb, prolateral view E, K distal part of palpal bulb, dorsal view F, L distal part of palpal bulb, retrolateral view. Abbreviations: bep = basal ear-shaped projection; mb = medial branch; lcb = lateral curved branch. Scale bars: 0.1 mm (A – C, G – I); 0.05 mm (D – F, J – L).

Figure 5. Trilacuna qingliangfeng sp. nov., female paratype A – C habitus in dorsal, ventral, and lateral views D – G prosoma in dorsal, ventral, lateral and anterior views H abdomen in ventral view. Scale bars: 0.4 mm (A – H).

Figure 6. Trilacuna qingliangfeng sp. nov., female paratype (A, B), Trilacuna guangwu sp. nov., male holotype (C), Trilacuna qingliangfeng sp. nov., male holotype (D), Trilacuna taoyuanyu sp. nov., male holotype (E), Trilacuna yunmeng sp. nov., male holotype (F) A, B copulatory organ in ventral and dorsal views C – F endites in ventral view. Abbreviations: ap = apodemes; as = anterior sclerite; glo = globular structure; mr = membranous region; psp = posterior spiracle; sar = sclerotized, recurved arches; sdb = slightly curved distal branch; tsc = transverse bars. Scale bars: 0.4 mm (A, B); 0.2 mm (C – F).

Figure 11. Distribution records of four new species from China. 1 = Trilacuna guangwu sp. nov.; 2 = Trilacuna qingliangfeng sp. nov.; 3 = Trilacuna taoyuanyu sp. nov.; 4 = Trilacuna yunmeng sp. nov.