Belisana keyti Huber, 2005

Huber, Bernhard A., 2019, The pholcid spiders of Sri Lanka (Araneae: Pholcidae), Zootaxa 4550 (1), pp. 1-57 : 6-8

Belisana keyti Huber, 2005

Figs 4–5 , 23 , 27–28

Belisana keyti Huber, 2005: 112 , figs 53, 617–620 (♂ ♀, Sri Lanka). Diagnosis (amendments; see Huber 2005). Easily distinguished from most congeners by curvature of procursus (towards ventral; Huber 2005: fig. 618); from two Sri Lankan species with similar procursus ( B. badulla , B. benjamini ) by bulbal apophysis (much smaller in B. badulla ; absent in B. benjamini ; compare Figs 22–24 ). Females are difficult to distinguish externally from similar congeners; pockets apparently consistently wider apart than in B. badulla (260–270 µm versus 200–250 µm; compare Figs 25–28 ); internal genitalia with distinctive pore plates (lateral round part with long narrow elongation towards median; Fig. 28 ; similar only in B. badulla ); with distinctive pair of internal folds ( Fig. 28 ).

Description (amendments; see Huber 2005). Tibia 1 in four newly examined males: 3.6, 4.1, 4.3, 4.5; in 12 females: 3.0–3.4 (mean 3.2). Pair of abdominal marks poorly visible in ethanol preserved specimens.

New record. SRI LANKA: 1♂ 1♀, NMSL , 3♂ 11♀, ZFMK (Ar 20004) , and 2♀ in pure ethanol, ZFMK ( SL144 ), Central Province, Hakgala Forest (6.930°N, 80.814°E), 1790 m a.s.l., 14.iii.2017 (B.A. Huber) .

Distribution. Known from type locality only ( Fig. 220 ).

Figures

FIGURES 1–9. Belisana, live specimens. 1–3. B. minneriya sp. n., males and female with egg-sac from Minneriya. 4–5. B. keyti Huber, 2005, male and female with egg-sac from Hakgala. 6–7. B. gowindahela sp. n., male from Ethagala, female with egg-sac from Dematagala. 8–9. B. ratnapura Huber, 2005, male from Mapalena Ella, female with egg-sac from Viharekele.

FIGURES 17–24. 17–22. Belisana badulla sp. n. (ZFMK Ar 20002). 17–19. Left procursus, prolateral, dorsal, and retrolateral views. 20–21. Male chelicerae, frontal and lateral views. 22. Left genital bulb, prolateral view. 23–24. B. keyti Huber, 2005 (ZFMK Ar 20004) and B. benjamini Huber, 2005 (ZFMK Ar 20005), left genital bulbs, prolateral views (all genital bulbs at same scale). Abbreviations: ba, bulbal apophysis; e, embolus. Scale lines: 0.2 mm.

FIGURES 25–30. Cleared female genitalia in ventral and dorsal views, all at same scale. 25–26. Belisana badulla sp. n. (ZFMK Ar 20002). 27–28. B. keyti Huber, 2005 (ZFMK Ar 20004); arrows point at distinctive pair of internal folds. 29–30. B. benjamini Huber, 2005 (ZFMK Ar 20005); arrows point at median folds. Abbreviations: po, pocket; pp, pore plate. Scale line: 0.2 mm.

FIGURES 220–221. Known distribution of Belisana in Sri Lanka.