Clubiona menglun Yu & Li, 2021

Zhang, Jianshuang, Yu, Hao & Li, Shuqiang, 2021, Taxonomic studies on the sac spider genus Clubiona (Araneae, Clubionidae) from Xishuangbanna Rainforest, China, ZooKeys 1034, pp. 1-163 : 1

Clubiona menglun Yu & Li sp. nov. Figs 49 , 78B , 86B , 94B

Holotype.

♀ (IZCAS-Ar 34762), China: Yunnan Province: Xishuangbanna: Mengla County: Menglun Town: XTBG, secondary tropical seasonal moist forest, 22°54.390'N, 101°16.811'E, ca. 612 m, 10.VIII.2007, G. Zheng leg. Other material examined. 1♀ (YHCLU0097), Jinghong City: Menga Town: Wengnan Village: secondary forest, 22°4.997'N, 100°22.223'E, ca. 1137 m, 25.VII.2012, Q.Y. Zhao and Z.G. Chen leg.

Etymology.

The species name is derived from the name of the type locality; noun in apposition.

Diagnosis.

Females of C. menglun sp. nov. resemble those of C. cheni (Figs 78A , 86A , 94A ) by having a similar general shape of the vulva but can be separated from them by the close spermathecae (vs. separated by ca. 0.5 diameter) (cf. Fig. 94B and 94A ) and by the globular bursae (vs. ellipsoidal) (cf. Fig. 94B and 94A ).

Description.

Female. Holotype (Fig. 49F, G ): Total length 2.99; carapace 1.07 long, 0.82 wide; opisthosoma 1.83 long, 1.07 wide. Carapace orange, slightly darker in front, without distinct pattern, fovea almost indistinguishable; ocular region slightly narrowed, cervical groove indistinct; tegument smooth, clothed with numerous short, fine setae. Eyes: in dorsal view, both anterior and posterior eye rows recurved, PER slightly wider than AER. Eye sizes and interdistances: AME 0.06, ALE 0.03, PME 0.07, PLE 0.05, AME-AME 0.04, AME-ALE 0.04, PME-PME 0.20, PME-PLE 0.04, MOQL 0.13, MOQA 0.12, MOQP 0.31. Chelicerae robust and brownish red, with conspicuous condyle, three promarginal and two retromarginal teeth. Sternum pale yellow, 0.67 long, 0.42 wide. Labium and endites coloured as chelicerae. Legs light yellowish white, without distinct markings. Leg measurements: I 1.77 (0.52, 0.70, 0.34, 0.21), II 2.02 (0.56, 0.86, 0.38, 0.22), III 1.50 (0.48, 0.53, 0.32, 0.17), IV 2.03 (0.60, 0.74, 0.46, 0.23). Abdomen oval, cream coloured, slightly darker dorsally, without pattern.

Epigyne (Figs 49A-E , 78B , 86B , 94B ). Epigynal plate slightly longer than wide, vulva clearly visible through the tegument. Copulatory openings distinct, close together, located close to posterior margin of epigynal plate. Hyaline copulatory ducts long and slender, almost parallel, ascending dorsally, then ascending obliquely, finally entering the connecting piece between the spermathecae and bursae. Both spermathecae and bursae globular and smooth, the former anteriad and smaller than the latter. Spermathecae close together, and bursae separated by one diameter. Fertilisation ducts acicular, relatively long, more than half spermathecae diameter, on dorsal surfaces of spermathecae.

Male. Unknown.

Comments.

Only two Clubiona trivialis group species are known from males (Table 6 ): C. transbaicalica from South Siberia and C. huaban from Guizhou in China. We cannot rule out the possibility that C. transbaicalica is conspecific to C. menglun sp. nov. However, the probability is very small because of: (1) the long distance between the two type localities (Xishuangbanna is 3500 Km from the Selenga Distr.); (2) their different sizes ( C. menglun sp. nov. is less than 3 mm, C. transbaicalica is 5.3-6.1 mm). C. menglun sp. nov. and C. huaban are considered separate species due to their different sizes ( C. menglun sp. nov. with 3 mm vs. C. huaban with 4.7 mm; different colours (carapace orange, cream-coloured abdomen without pattern in C. menglun sp. nov. (vs. carapace light brown, yellowish brown abdomen marked with numerous brown spots in C. huaban ).

Distribution.

Known only from the type locality, Xishuangbanna, Yunnan, China.

Figures

Figure 49. Holotype female of Clubiona menglun sp. nov. epigyne (A-E) and habitus (F, G) A intact, ventral view B cleared, ventral view C cleared, ventral view D cleared, dorsal view E cleared, dorsal view F dorsal view G ventral view. Abbreviations: BS = bursa; CD = copulatory duct; CO = copulatory opening; FD = fertilisation duct; SP = spermatheca. Scale bars: 0.1 mm (equal for A-E); 1 mm (equal for F, G).

Figure 78. Clubiona spp. of the C. trivialis group (A-D) and the C. filicata group (E, F), epigyne, intact, ventral view A C. cheni B C. menglun sp. nov., holotype C C. subasrevida D C. subquebecana E C. banna sp. nov., paratype F C. melanosticta. Abbreviations: A = atrium; CO = copulatory opening. Scale bars: 0.1 mm.

Figure 86. Clubiona spp. of the C. trivialis group (A-D) and the C. filicata group (E, F), epigyne, cleared, ventral view A C. cheni B C. menglun sp. nov., holotype C C. subasrevida D C. subquebecana E C. banna sp. nov., paratype F C. melanosticta. Abbreviations: A = atrium; CO = copulatory opening. Scale bars: 0.1 mm.

Figure 94. Clubiona spp. of the C. trivialis group (A-D) and the C. filicata group (E, F), vulva, cleared, dorsal view A C. cheni B C. menglun sp. nov., holotype C C. subasrevida D C. subquebecana E C. banna sp. nov., paratype F C. melanosticta. Abbreviations: BS = bursa; CD = copulatory duct; FD = fertilisation duct; SB = spermathecal base; SH = spermathecal head; SP = spermatheca; SS = spermathecal stalk. Scale bars: 0.1 mm.