Clubiona lamellaris, Zhang & Yu & Zhong, 2018

Zhang, Jianshuang, Yu, Hao & Zhong, Yang, 2018, Two new species of the Clubiona corticalis - group from Guizhou Province, China (Araneae: Clubionidae), Zootaxa 4415 (2), pp. 393-400 : 396-399

Clubiona lamellaris sp. nov. ( Figs. 3–5 )

Type material. Holotype ♂ (MGEU-CLU-16-027) from Gaofeng Villiage , Siping Township, Yangxi Town (29°8'15.40"N, 107°34'12.14"E, 1790 m), Dashahe Nature Reserve, Guizhou Province, China, 4 July 2016, Cong Leng and Changjiang Li leg. ; Paratypes: 1 ♂, 3 ♀ (MGEU-CLU-16-028~031), same data as holotype

Etymology. The species epithet is taken from the Latin adjective “lamellae” and refers to the sheet-shaped subapical tooth of embolus.

Diagnosis. Males of Clubiona lamellaris sp. nov. resemble those of Clubiona applanata Liu, Yan, Griswold & Ubick, 2007 ( Liu et al., 2007: figs 1–5) in having similar RTA and VTA, strong embolus with a curved tip and enlarged bulb with S-shaped sperm duct, but differ by: (1) body almost pure white ( Figs 3D–E ) (predominantly yellow in C. applanata ); (2) embolus with subapical tooth ( Figs 4A–C ); (3) palpal patella and femur with apophyses ( Figs 4B–C ); (4) conductor with dagger-shaped tip extending to prolateral side of embolus ( Figs 4A–C ) (relatively short tip in C. applanata ); Females also resemble those of Clubiona applanata in having a subovate atrium but can be recognized by the atrium nearly peach-shaped ( Fig. 4D ) (upright oblate in C. applanata ), brim-shaped anterior atrial membrane ( Fig. 4D ) (thick membrane surrounding the atrium in C. applanata ); spermathecae subtriangular ( Fig. 4E ) (globular in C. applanata ).

Description. Male (holotype): Total length 3.51. prosoma 1.62 long, 1.22 wide; opisthosoma 1.93 long, 1.07 wide. Prosoma ( Fig. 3D ). Ovoid in dorsal view, ocular region distinctly narrowed, widest between coxae II and III; in profile highest just behind longitudinal fovea; integument smooth, clothed with short fine hairs. Carapace nearly pure white, without distinctive color pattern; fovea dark. Chelicerae white except brown fang, promarginal and retromarginal both with 4 teeth. Labium and endites white. Sternum oval, white. Eyes. AER slightly recurved, PER slightly wider than AER and procurved when seen from above. AME dark, other eyes light; with black rings. Eye sizes and interdistances: AME 0.05, ALE 0.10, PME 0.09, PLE 0.06. AME–AME 0.04, AME–ALE 0.04, PME–PME 0.13, PME–PLE 0.09, MOQL 0.22, MOQA 0.04, MOQP 0.31. Legs. White, without distinct color markings. Leg formula: IV, II, I, III; leg measurements: I 3.64 (1.03, 1.39, 0.69, 0.53), II 4.12 (1.23, 1.62, 0.71, 0.56), III 3.43 (1.15, 1.16, 0.82, 0.30), IV 5.02 (1.53, 1.62, 1.39, 0.48). Opisthosoma ( Fig. 3D ). Elongate-oval, white, with inconspicuous anterior tufts of hairs, dorsum with two pairs of inconspicuous muscular depressions; venter white. Palp ( Figs 3A–C , 4A–C ). Femur with short, thick retrolateral apophysis originating proximally; patella twice longer than tibia, with blunt, round apophysis; tibia short, with two apophyses, VTA short with blunt, partly membranous tip, RTA broad, flat and triangular; genital bulb elongated, sperm duct S-shaped in venter view; subtegulum visible prolaterally; embolus strong, with a beak-shaped tip and a sheet-shaped subapical tooth, the embolic base situated retrolateral on the tegulum and toward prolaterally but the curved tip point retrolaterally; conductor originating from retrolateral side of tegulum, with a membranous, daggershaped distal part.

Female (paratype: MGEU-CLU-16-029): Total length 5.31. prosoma 1.65 long, 1.25 wide; opisthosoma 3.51 long, 1.93 wide. General color darker than in male ( Fig. 3E ). Eye sizes and interdistances: AME 0.07, ALE 0.08, PME 0.08, PLE 0.06. AME–AME 0.03, AME–ALE 0.03, PME–PME 0.18, PME–PLE 0.12, MOQL 0.22, MOQA 0.20, MOQP 0.34. Leg formula: IV, II, I, III. Leg measurements: I 3.34 (0.97, 1.31, 0.63, 0.44), II 3.82 (1.16, 1.54; 0.64; 0.50), III 3.2 2 (0.94, 1.12, 0.73, 0.44), IV 4.84 (1.37, 1.63, 1.36, 0.48). Epigyne ( Figs 3F–G , 4D–E ). Epigynal plate slightly shorter than wide, margin not rebordered; atrium approximately peach-shaped, with brim-shaped membrane on anterior margin; copulatory openings small, located anteriorly on atrium. Copulatory ducts dark descending posteriorly to connect with spermathecae; spermathecae situated anteriorly, with subtriangular proximal part and tubular distal part; reniform bursae situated posteriorly, translucent, surface wrinkled and ribbed; fertilization ducts short, acicular.

Natural history. The holotype of C. lamellaris spec. nov. was obtained from foliage in bush close to a small stream in the center of the Dashahe Nature Reserve.

Distribution. Know only from the type locality, Dashahe Nature Reserve, Guizhou, China ( Fig. 5 ).

Figures

FIGURE 3. Clubiona lamellaris sp. nov.: A male left palp, ventral view; B same, prolateral view; Csame, retrolateral view; D male habitus, dorsalview; Efemale habitus,dorsalview;F epigyne,ventralview; Gsame,dorsalview.Scale bars:0.20mm (A–C,F–G); 2 mm (D–E).

FIGURES 4. Clubiona lamellaris sp. nov.: A male left palp, prolateral view; B same, ventral view; C same, retrolateral view; D epigyne, ventral view; E same, dorsal view. Abbreviatures: A, epigynal atrium; BS, bursa; C, conductor; CD, copulatory duct; CO, copulatory opening; E, embolus; FA, femoral apophysis; FD, fertilization duct; RTA, retrolateral tibial apophysis; PA, patellar apophysis;SP,spermatheca; ST, subapicaltooth of embolus;VTA, ventraltibial apophysis.Scale bars:0.20 mm (A–E).

FIGURE 5. Locality recordsof Clubiona bifurcata sp.nov. and C. lamellaris sp. nov.