East African pholcid spiders: an overview, with descriptions of eight new species (Araneae, Pholcidae) Author Bernhard A. Huber Author Charles M. Warui text European Journal of Taxonomy 2012 2012-11-26 29 29 1 44 journal article 32671 10.5852/ejt.2012.29 3de0a260-04a8-4d36-9384-5cff3934095e 1406636 28503B8D-9B2C-484D-A7A2-B44D4DC04F6D Buitinga batwa sp. nov. urn:lsid:zoobank.org:act:C456910B-9E7B-4872-830B-87F240C313E3 Figs 13 , 36-39 , 81-86 Buitinga Uga 61: Dimitrov, Astrin & Huber 2012 (DNA sequence data). Diagnosis Easily distinguished from known congeners by extremely long male cheliceral apophyses ( Figs 83, 84 ); from similar B. buhoma Huber, 2003 also by wider epigynal scape and median pocket in internal female genitalia ( Figs 65 , 85 ), and by details of male palp (shape of bulbal apophysis, two small projections on bulb apart from apophysis and embolus, shapes of distal structures of procursus; Figs 81, 82 ). Etymology The species is named after the Batwa pygmies of south-western Uganda; noun in apposition. Type material Holotype ♂ , in ZFMK ( Ar 8743 ) . Paratypes 3 ♂♂ , 4 ♀♀ , in ZFMK ( Ar 8744 ) . Type locality UGANDA , Kisoro District , Mgahinga Gorilla N.P. , gorge ( 1°22.9’S , 29°35.8-36.0’E), 2900-3000 m a.s.l., 25 Nov. 2010 ( B.A. Huber ). Other material examined UGANDA : Western Region : 1 ♂ , 2 ♀♀ , 1 juv. in pure ethanol, in ZFMK ( Uga 147 ), Kisoro District, Mgahinga Gorilla N.P. , gorge , same data as types above ; 2 ♂♂ , 1 ♀ , in ZFMK ( Ar 8745 ), Mgahinga Gorilla N.P. , bamboo forest (~1°22.0-22.3’S, 29°36.3-36.9’E), 2500-2600 m a.s.l., 25 Nov. 2010 ( B.A. Huber ) ; 2 ♂♂ , 1 juv. in pure ethanol, in ZFMK ( Uga 150 ), same data ; 3 ♂♂ , in ZFMK ( Ar 8746 ), Kisoro District , between Nyakabande and Muko , roadside forest ( 1°15.2’S , 29°47.6’E ), 2260 m a.s.l., 26 Nov. 2010 ( B.A. Huber ) . Description Male ( holotype ) MEASUREMENTS. Total body length 2.7, carapace width 1.0. Leg 1: 19.5 (4.6 + 0.4 + 4.8 + 7.3 + 2.4), tibia 2: 2.8, tibia 3: 2.2, tibia 4: 2.9; tibia 1 L/d: 54. Distance PME-PME 185 µm, diameter PME 115 µm, distance PME-ALE 45 µm, no AME. COLOR. Carapace pale ochre-yellow with black lateral marks, ocular area and clypeus dark brown to black, sternum black with slightly lighter mark behind labium; legs ochre-yellow, darker rings on femora (subdistally) and tibiae (proximally and subdistally); abdomen pale grey with distinctive black pattern. BODY. Habitus as in Figs 36-38 ; ocular area slightly elevated; only frontally shallow thoracic furrow; clypeus unmodified. Chelicerae as in Figs 83 and 84 , with proximal lateral apophyses, pair of extremely long frontal apophyses, each provided with several strong claw-shaped hairs proximo-dorsally and about four modified hairs distally; without further pair of frontal apophyses near laminae. Sternum wider than long (0.70/0.57), unmodified. PALPS. In general very similar B. buhoma Huber, 2003 (cf. figs 113 and 114 in Huber 2003a ) but coxa with prominent ventral apophysis distally and tibia slightly longer; bulb with four projections: weakly sclerotized embolus, hooked apophysis with subdistal sclerotized ridge, small projection at basis of apophysis (arrow in Fig. 82 ), and pointed cone-shaped process (arrow in Fig. 81 ); procursus with large cushion-like structure retrolaterally, prolateral hinged process, complex distally. LEGS. Without spines and curved hairs, few vertical hairs; retrolateral trichobothrium on tibia 1 at 10%; prolateral trichobothrium absent on tibia 1, present on other tibiae; tarsus 1 with ~30 pseudosegments. Figs 81-86. Buitinga batwa sp. nov. 81-82. Left ♂ procursus and bulb, prolateral and retrolateral views. 83-84. ♂ chelicerae, fronto-dorsal and lateral views. 85-86. ♀ genitalia, ventral and cleared dorsal views (arrow points at distinctive internal pocket). b: genital bulb; ba: bulbal apophysis; e: embolus; pr: procursus. Scale lines: 0.3 mm (83-84), 0.5 mm (81-82, 85-86). VARIATION. Tibia 1 in 9 other males: 4.4-5.2 (mean 4.7). Female In general similar to male but triads closer together (distance PME-PME 150 µm). Tibia 1 in 5 females : 3.5-3.9 (mean 3.75). Epigynum a simple plate with wide straight scape in anterior position ( Figs 64 , 85 ), with distinctive internal sclerotized pocket (arrow in Fig. 86 ) and large pore plates ( Figs 65 , 86 ). Distribution Known from southwestern Uganda only ( Fig. 18 ).