Pholcus puranappui, Huber, 2019

Huber, Bernhard A., 2019, The pholcid spiders of Sri Lanka (Araneae: Pholcidae), Zootaxa 4550 (1), pp. 1-57 : 18

Pholcus puranappui sp. n.

Figures 51 , 59–61 , 69–70 , 79–81 , 87 , 91

Pholcus SL63: Eberle et al. 2018 (molecular data); Huber et al. 2018: fig. 12.

Diagnosis. Males are easily distinguished from other species in ceylonicus group by shape of genital bulb ( Figs 79– 81 ): distinctive main bulbal process (‘appendix’), i.e. large sclerotized process without retrolateral membrane and retrolateral conical projection (in contrast to P. ceylonicus ), wider in dorsal view than in P. metta ; without prolateral process (in contrast to P. uva ); distinguished from P. uva also by shape of procursus ( Figs 69–70 ; narrower and with subdistal dorsal process). Females are distinguished from P. ceylonicus and P. uva by larger posterior excavation of pre-epigynal plate ( Fig. 87 ); from P. metta by wider pre-epigynal plate (compare Figs 86 and 87 ).

Etymology. Named for Weerahennadige Francisco Fernando alias Puran Appu, member of the Matale Rebellion. He was executed by a firing squad on August 8, 1848.

Type material. SRI LANKA: ♂ holotype, ZFMK (Ar 20050), Sabaragamuwa Province, above Dematagala (6.451°N, 80.751°E), 160 m a.s.l., 16.iii.2017 (B.A. Huber) .

Other material examined. SRI LANKA: 4♂ 3♀, ZFMK (Ar 20051), and 1 juv. in pure ethanol, ZFMK ( SL149 ), same data as holotype . 1♂ 4♀, ZFMK (Ar 20052), and 1♀ 1 juv. in pure ethanol, ZFMK ( SL137 ), Uva Province, near Okkampitiya (6.728°N, 81.336°E), 190 m a.s.l., 13.iii.2017 (B.A. Huber) . 6♂ 1♀, ZFMK (Ar 20053), and 1♂ in pure ethanol, ZFMK ( SL148 ), Uva Province, near Weli Oya Bridge (6.769°N, 80.846°E), 830 m a.s.l., 15.iii.2017 (B.A. Huber) . 2♀ 3 juvs, ZMUT ( AA 3516–17 ), Ratnapura District, Belihul Oya [6°41’N, 80°46’E], on walls, 18.i.1969 (P. Lehtinen) . 1♀, ZMUT ( AA 3518 ), Moneragala District, Diyaluma Falls [6°44’N, 81°02’E], in litter, 19.xi.1972 (P. Lehtinen) .

Description. Male (holotype). MEASUREMENTS. Total body length 6.2, carapace width 1.8. Distance PME- PME 280 µm, diameter PME 140 µm, distance PME-ALE 40 µm, distance AME-AME 40 µm, diameter AME 90 µm. Sternum width/length: 1.1/0.8. Leg 1: 55.0 (13.5 + 0.8 + 13.6 + 23.9 + 3.2), tibia 2: 9.3, tibia 3: 6.4, tibia 4: 8.4; tibia 1 L/d: 72. Femora 1–4 width (at half length): 0.22, 0.22, 0.21, 0.22.

COLOR (in ethanol). Carapace ochre-yellow with large dark brown posterior mark, ocular area also brown, clypeus not darkened; sternum ochre-yellow with large triangular brown median mark; legs ochre to light brown, with indistinct darker rings subdistally on femora and tibiae, tips of femora and tibiae whitish; abdomen ochregray, with series of cuticular dorsal marks, brown area in front of gonopore and pair of smaller dark marks lateral of gonopore, indistinct wide median band between gonopore and spinnerets.

BODY. Habitus as in Fig. 51 ; ocular area slightly raised, each triad on low hump; carapace without median furrow; clypeus and sternum unmodified.

CHELICERAE. As in P. ceylonicus (cf. Huber & Benjamin 2005: fig. 2d), with pair of distal apophyses close to laminae, each with two modified hairs, and pair of small proximal lateral apophyses.

PALPS. As in Figs 59–61 ; coxa unmodified; trochanter with strong retrolateral apophysis with large modified hair at its tip and rounded subdistal process prolaterally; femur large, with distinct dorsal process and two small ventral processes; procursus simple compared to most congeners ( Figs 69–70 ), with dorsal and prolateral processes distally; genital bulb as in Figs 79–81 , partly whitish, partly sclerotized and brown, with three processes: conical membranous process (putative embolus), small sclerotized process close to proximal bulbal sclerite, and large mostly sclerotized main bulbal process (‘appendix’).

LEGS. Without spines and curved hairs, few vertical hairs; retrolateral trichobothrium on tibia 1 at 5%; prolateral trichobothrium absent on tibia 1; tarsus 1 with many pseudosegments but only distally ~10 distinct.

Male (variation). Tibia 1 in 10 other males: 10.0–12.4 (mean 11.3). Males from Okkampitiya with main bulbal process slightly wider in dorsal view, with slightly larger dark mark on carapace, and mark on sternum larger and star-shaped rather than triangular.

Female. In general similar to male; tibia 1 in 11 females: 9.2–12.4 (mean 10.7). Epigynum as in Fig. 87 ; with large sclerotized area (pre-epigynal plate) in front of small epigynal plate; the latter in circular excavation of preepigynal plate and provided with finger-shaped median process (‘knob’); width of circular excavation: 0.17–0.22. Internal genitalia as in Fig. 91 , with pair of oval pore plates.

Natural history. This species was found in similar microhabitats and webs as P. ceylonicus , but never in high densities.

Distribution. Known from several localities in southern Sri Lanka ( Fig. 223 ).

Figures

FIGURES 47–52. Pholcus, live specimens and habitat photo. 47–50. P. ceylonicus O. Pickard-Cambridge, 1869, male from Mitirigala, rock cleft at Ethagala Mountain, containing ~1000 large specimens of P. ceylonicus; female with egg-sac from Kitulgala, and male from Gowindahela. 51. P. puranappui sp. n., male from Dematagala. 52. P. uva sp. n., male from Inginiyagala.

FIGURES 59–64. Left male palps in prolateral, dorsal, and retrolateral views. 59–61. Pholcus puranappui sp. n. (from Dematagala, ZFMK Ar 20051). 62–64. P. uva sp. n. (from Inginiyagala, ZFMK Ar 20055). Scale lines: 0.5 mm.

FIGURES 65–72. Left procursi in retrolateral (upper row) and dorsal views. 65–66. Pholcus ceylonicus O. Pickard- Cambridge, 1869 (from Kandy, ZFMK Ar 20039). 67–68. P. metta sp. n. (from Dimbulagala, ZFMK Ar 20049); arrows point at subdistal dorsal process, asterisks mark prolateral processes. 69–70. Pholcus puranappui sp. n. (from Dematagala, ZFMK Ar 20051). 71–72. P. uva sp. n. (from Inginiyagala, ZFMK Ar 20055). At different scales.

FIGURES 79–84. Left genital bulbs in prolateral, dorsal, and retrolateral views. 79–81. Pholcus puranappui sp. n. (from Dematagala, ZFMK Ar 20051). 82–84. P. uva sp. n. (from Inginiyagala, ZFMK Ar 20055); arrows point at distinctive prolateral and retrolateral projections. Scale lines: 0.5 mm.

FIGURES 85–88. Epigyna in ventral views, all at same scale. 85. Pholcus ceylonicus O. Pickard-Cambridge, 1869 (from Kandy, ZFMK Ar 20039). 86. P. metta sp. n. (from Dimbulagala, ZFMK Ar 20049). 87. Pholcus puranappui sp. n. (from Dematagala, ZFMK Ar 20051). 88. P. uva sp. n. (from Inginiyagala, ZFMK Ar 20055). Abbreviations: ep, epigynal plate; k, ‘knob’ (median epigynal process); pep, pre-epigynal plate. Scale line: 0.5 mm.

FIGURES 89–92. Cleared female genitalia, dorsal views, all at same scale. 89. Pholcus ceylonicus O. Pickard-Cambridge, 1869 (from Kandy, ZFMK Ar 20039). 90. P. metta sp. n. (from Dimbulagala, ZFMK Ar 20049). 91. Pholcus puranappui sp. n. (from Dematagala, ZFMK Ar 20051). 92. P. uva sp. n. (from Inginiyagala, ZFMK Ar 20055). Scale line: 0.5 mm.

FIGURES 222–223. Known distributions of Leptopholcus (222) and of the Pholcus ceylonicus species group (223) in Sri Lanka.