Pholcus yongshun Yao & Li, 2018

Zhu, Keli, Yao, Zhiyuan, Bai, Xiujuan & Li, Shuqiang, 2018, Five new species of the spider genus Pholcus Walckenaer, 1805 (Araneae: Pholcidae) from China and Thailand, Zootaxa 4377 (2), pp. 235-253 : 246-249

Pholcus yongshun Yao & Li sp. nov.

FIGS 8–9

Type material. Holotype: MAlE, TUDI TEMPlE (28°54.498’N, 109°10.332’E, ElEVATION 559 M), XIAOXI TOWN, YONGSHUN COUNTY, Hunan, China, 12 JANUARY 2016, Z. CHEN AND J. WANG lEG . Paratype: 1 FEMAlE, SAME DATA AS HOlOTYPE .

Etymology. THE SPECIFIC NAME REFERS TO THE TYPE lOCAlITY, AND IS A NOUN IN APPOSITION.

Diagnosis. THIS SPECIES RESEMBlES P. gonggarensis YAO & LI, 2016 (SEE DONG et al. 2016B: 19, FIGS 13–14, 27C–D) WITH SIMIlAR MAlE CHElICERAE ( FIG. 9D ), BUlBAl APOPHYSES ( FIG. 9C ) AND EPIGYNUM ( FIG. 9A ) BUT CAN BE DISTINGUISHED BY THE SHORT RETROlATERO-VENTRAl APOPHYSIS ON THE MAlE PEDIPAlPAl TROCHANTER ( FIGS 8A–B ), BY THE NARROW, MEMBRANOUS PROlATERAl PROCESS DISTAllY ON THE PROCURSUS (ARROW 2 IN FIG. 8C ) AND BY THE NEARlY TRIANGUlAR PORE PlATES ( FIG. 9B ).

Description. Male (holotype): TOTAl lENGTH 4.95 (5.19 WITH ClYPEUS), CARAPACE 1.38 lONG, 1.60 WIDE, OPISTHOSOMA 3.57 lONG, 1.74 WIDE. LEG I: 43.95 (10.32 + 0.67 + 10.16 + 20.38 + 2.42), lEG II: 27.54 (7.69 + 0.65 + 6.63 + 10.95 + 1.62), lEG III: 19.68 (5.77 + 0.6 + 4.58 + 7.53 + 1.20), lEG IV: 26.21 (7.60 + 0.61 + 6.18 + 10.32 + 1.50); TIBIA I L/D: 74. DISTANCE PME-PME 0.25; DIAMETER PME 0.15; DISTANCE PME-ALE 0.04; DISTANCE AME- AME 0.05; DIAMETER AME 0.10. STERNUM WIDER THAN lONG (1.06/0.97). HABITUS AS IN FIGS 9E–F . CARAPACE YEllOWISH, WITH BROWN RADIATING MARKS; OCUlAR AREA YEllOWISH, WITH BROWN MARKS MEDIAllY AND lATERAllY; ClYPEUS AND STERNUM BROWN. LEGS YEllOWISH, BUT DARK BROWN ON PATEllAE AND PROXIMAl PARTS OF TIBIAE, AND WHITISH ON PROXIMAl PARTS OF FEMORA AND DISTAl PARTS OF FEMORA AND TIBIAE, FEMORA (SUBDISTAllY) AND TIBIAE (SUBDISTAllY) WITH DARKER RINGS. OPISTHOSOMA YEllOWISH, WITH SPOTS DORSAllY AND lATERAllY. OCUlAR AREA ElEVATED, WITHOUT EYE-STAlKS. THORACIC FURROW ABSENT. CHElICERAE AS IN FIG. 9D , WITH A PAIR OF PROXIMO-lATERAl APOPHYSES, A PAIR OF DISTAl APOPHYSES, AND A PAIR OF FRONTAl APOPHYSES. PEDIPAlPS AS IN FIGS 8A–B ; TROCHANTER WITH A SHORT RETROlATERO-VENTRAl APOPHYSIS; FEMUR WITH A SMAll DORSAl APOPHYSIS PROXIMAllY (ARROW IN FIG. 8B ) AND A DISTINCT VENTRAl PROTUBERANCE; TIBIA WITH A PROJECTION VENTRAllY; PROCURSUS SIMPlE PROXIMAllY BUT COMPlEX DISTAllY, WITH THREE PROlATERO-DORSAl SPINES (ONE SPINE SEEN IN FIG. 8C ); UNCUS WITH A SCAlY EDGE; APPENDIX HOOKED, WITH A BRANCH MEDIAllY; EMBOlUS WEAKlY SClEROTIZED, WITH SOME TRANSPARENT PROJECTIONS DISTAllY. RETROlATERAl TRICHOBOTHRIUM OF TIBIA I AT 6% PROXIMAllY; lEGS WITH SHORT VERTICAl SETAE ON TIBIAE, METATARSI AND TARSI, WITHOUT SPINES AND CURVED SETAE; TARSUS I WITH 31 DISTINCT PSEUDOSEGMENTS.

Female: SIMIlAR TO MAlE, HABITUS AS IN FIGS 9G–H . TOTAl lENGTH 4.74 (4.93 WITH ClYPEUS), CARAPACE 1.25 lONG, 1.48 WIDE, OPISTHOSOMA 3.49 lONG, 1.60 WIDE; TIBIA I: 6.79; TIBIA I L/D: 54. DISTANCE PME-PME 0.20; DIAMETER PME 0.16; DISTANCE PME-ALE 0.05; DISTANCE AME-AME 0.06; DIAMETER AME 0.09. STERNUM WIDER THAN lONG (0.96/ 0.88). EPIGYNUM ( FIG. 9A ) WITH A KNOB. VUlVA ( FIG. 9B ) WITH A SClEROTIZED ANTERIOR ARCH AND TWO NEARlY TRIANGUlAR PORE PlATES.

Variation: RIGHT PROCURSUS IN HOlOTYPE WITH TWO PROlATERO-DORSAl SPINES.

Distribution. CHINA (HUNAN, TYPE lOCAlITY; FIG. 12 ).

Natural history. THE SPECIES WAS FOUND ON THE ROCK WAllS.

Figures

FIGURE 8. Pholcus yongshun Yao & Li sp. nov., holotype male. A–B. Pedipalp (A. Prolateral view; B. Retrolateral view, arrow points at dorsal apophysis on femur proximally); C–D. Distal part of procursus (C. Prolateral view, arrow 1 points at prolatero-dorsal spine, arrow 2 points at prolateral process; D. Dorsal view). a = appendix, b = bulb, e = embolus, pr = procursus, u = uncus.Scale bars: 0.20 (A–B), 0.05 (C–D).

FIGURE 9. Pholcus yongshun Yao & Li sp. nov., holotype male (C–F) and paratype female (A–B, G–H). A. Epigynum, ventral view; B. Vulva, dorsal view; C. Bulbal apophyses, prolateral view; D. Chelicerae, frontal view; E–H. Habitus (E, G. Dorsal view; F. Lateral view; H. Ventral view). a = appendix, da = distal apophysis, e = embolus, fa = frontal apophysis, pa = proximo-lateral apophysis, pp = pore plate, u = uncus.Scale bars: 0.10 (A–C), 0.20 (D), 1.00 (E–H).

FIGURE12. Distribution records of new Pholcusspecies from China and Thailand.1. P.sakaewYao & Li sp. nov. from the P. bidentatus species-group; 2. P.umphang Yao & Li sp. nov. from the P. halabala species-group; 3. P. ningan Yao & Li sp. nov. from the P. phungiformes species-group; 4. P. yongshun Yao & Li sp. nov. and 5. P. yuxi Yao & Li sp. nov. from the P. yichengicusspecies-group.