Pholcus yuxi 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 : 249-252

Pholcus yuxi Yao & Li sp. nov.

FIGS 10–11

Type material. Holotype: MAlE, SHIMEN GORGE (23°58.405'N, 101°31.558'E, ElEVATION 1989 M), AIlAO MOUNTAIN SCENIC SPOT, GASA TOWN, XINPING COUNTY, YUXI, Yunnan, China, 30 MAY 2015, Z . CHEN AND Y. LI lEG. Paratypes: 2 MAlES AND 3 FEMAlES, SAME DATA AS HOlOTYPE .

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

Diagnosis. THIS SPECIES RESEMBlES P. qingyunensis YAO & LI, 2016 (SEE DONG et al. 2016B: 27, FIGS 19–20) WITH SIMIlAR MAlE CHElICERAE ( FIG. 11D ), UNCUS ( FIG. 11C ) AND EPIGYNUM ( FIG. 11A ) BUT CAN BE DISTINGUISHED BY THE SMAll, CURVED PROlATERAl APOPHYSIS SUBDISTAllY (ARROW 1 IN FIG. 10C ) AND THE STRONGlY SClEROTIZED RETROlATERAl APOPHYSIS DISTAllY (ARROW 2 IN FIG. 10C ) ON THE PROCURSUS, BY THE ABSENCE OF BRANCHES ON THE APPENDIX ( FIG. 11C ) AND BY THE NEARlY TRIANGUlAR PORE PlATES ( FIG. 11B ).

Description. Male (holotype): TOTAl lENGTH 4.86 (4.98 WITH ClYPEUS), CARAPACE 1.30 lONG, 1.68 WIDE, OPISTHOSOMA 3.56 lONG, 1.48 WIDE. LEG I: 40.99 (9.61 + 0.68 + 10.19 + 18.27 + 2.24), lEGS II–IV MISSING (SEE VARIATION); TIBIA I L/D: 68. DISTANCE PME-PME 0.30; DIAMETER PME 0.17; DISTANCE PME-ALE 0.04; DISTANCE AME- AME 0.07; DIAMETER AME 0.14. STERNUM WIDER THAN lONG (0.88/0.83). HABITUS AS IN FIGS 11E–F . CARAPACE YEllOWISH, WITH BROWN RADIATING MARKS AND BROWN BANDS MARGINAllY; OCUlAR AREA YEllOWISH, WITH BROWN MARKS ANTERIORlY; ClYPEUS AND STERNUM BROWN. LEG I YEllOWISH, BUT DARK BROWN ON PATEllAE, AND WHITISH ON PROXIMAl AND DISTAl PARTS OF FEMORA AND TIBIAE, FEMORA (SUBPROXIMAllY AND SUBDISTAllY) AND TIBIAE (SUBPROXIMAllY AND SUBDISTAllY) WITH DARKER RINGS. OPISTHOSOMA YEllOWISH, WITH SPOTS DORSAllY AND lATERAllY. OCUlAR AREA ElEVATED, WITHOUT EYE- STAlKS. THORACIC FURROW ABSENT. CHElICERAE MISSING, PARATYPE AS IN FIG. 11D , WITH A PAIR OF PROXIMO-lATERAl APOPHYSES, A PAIR OF DISTAl APOPHYSES, AND A PAIR OF FRONTAl APOPHYSES. PEDIPAlPS AS IN FIGS 10A–B ; TROCHANTER WITH A VENTRAl APOPHYSIS; FEMUR WITH A DISTINCT VENTRAl PROTUBERANCE; TIBIA WITH A PROJECTION PROlATERAllY; PROCURSUS SIMPlE PROXIMAllY BUT COMPlEX DISTAllY, WITH TWO PROlATERO-DORSAl SPINES (ARROWS IN FIG. 10D ); UNCUS WITH A SCAlY EDGE; APPENDIX SlIGHTlY CURVED; EMBOlUS WEAKlY SClEROTIZED. RETROlATERAl TRICHOBOTHRIUM OF TIBIA I AT 5% PROXIMAllY; lEG I WITH SHORT VERTICAl SETAE ON TIBIAE, METATARSI AND TARSI, WITHOUT SPINES AND CURVED SETAE; TARSUS I WITH 30 DISTINCT PSEUDOSEGMENTS.

Female: SIMIlAR TO MAlE, HABITUS AS IN FIGS 11G–H . TOTAl lENGTH 4.87 (5.06 WITH ClYPEUS), CARAPACE 1.40 lONG, 1.39 WIDE, OPISTHOSOMA 3.47 lONG, 2.03 WIDE; TIBIA I: 7.76; TIBIA I L/D: 52. 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 (1.03/ 0.91). OCUlAR AREA WITH BROWN MARKS MEDIAllY AND lATERAllY. EPIGYNUM ( FIG. 11A ) WITH A KNOB. VUlVA ( FIG. 11B ) WITH A SClEROTIZED ANTERIOR ARCH AND TWO NEARlY TRIANGUlAR PORE PlATES.

Variation: TIBIA I IN THE OTHER TWO MAlE PARATYPES: 10.06, 12.30. TIBIA I IN THE OTHER TWO FEMAlE PARATYPES: 8.01, 8.33.

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

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

Figures

FIGURE 10. Pholcus yuxi Yao & Li sp. nov., holotype male. A–B. Pedipalp (A. Prolateral view; B. Retrolateral view); C–D. Distal part of procursus (C. Prolateral view, arrow 1 points at curved prolateral apophysis, arrow 2 points at sclerotized retrolateral apophysis; D. Dorsal view, arrows point at two dorsal spines). a = appendix, b = bulb, e = embolus, pr = procursus, u = uncus.Scale bars: 0.20 (A–B), 0.05 (C–D).

FIGURE11. Pholcus yuxi Yao& Li sp. nov., holotype male (C, E–F), paratype male (D) 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.