3284 Author Henrard, Arnaud Author Jocqué, Rudy text Zootaxa 2012 2012-04-30 3284 1 104 journal article 1175­5334 Orchestina acaciae new species Figures 1–37 , 606 TYPE: Male holotype : Tanzania , Mkomazi Game Reserve , -3.88333°, 37.88333°, 31 Dec.1995 , canopy fogging of Acacia nilotica in tropical savanna, McGavin G.C. , deposited in OUMNH ( PBI _OON 33858) . ETYMOLOGY: Most of the specimens have been collected from Acacia trees, hence the species name. DIAGNOSIS: Males of O. acaciae can be recognized by the anteriorly directed projection of the endites ( Figs. 2, 3 , 17–20 ), the bulb with a conspicuous retrolateral swelling and a broad embolus whose tip is grooved and has a small triangular tooth ( Figs. 32–34 ). Females can be recognized by the combination of abdomen with short trunkshaped posterior elongation ( Fig. 7 ), anterior receptaculum with lateral expansions ( Fig. 36 ) and AUS club shaped with recurved terminal projections (Pr) ( Fig. 8–11 ). MALE (PBI_OON 33858, Figs. 1–5 , 17–34 ). Total length 0.92. CEPHALOTHORAX: Carapace yellow, elongate oval in dorsal view (CW/CL ≈ 0.68), pars cephalica domed in lateral view, anteriorly narrowed to between 0.5 and 0.75 times its maximum width. Clypeus sloping forward in lateral view. Eyes ALE-PME touching, PME circular; PLE-PME separated by less than PME radius. Sternum longer than wide, pale yellow, uniform, posterior margin extending posteriorly beyond anterior edges of coxae IV as single extension; setae abundant, evenly scattered. Mouthparts: Chelicerae, endites and labium pale orange. Chelicerae straight; retromargin with one tooth and some denticles ( Fig. 24 ). Labium elongated hexagon, anterior margin pointed at middle, same as sternum in sclerotization; with 6 or more setae on anterior margin, anteriorly with three subdistal setae, medially with one pair of setae, posteriorly with one seta ( Fig. 18–20 ). Endites serrula present in single row, same as sternum in sclerotization, anterior part bifid, one prong with sclerotized tip, other one provided with flattened, pectinate setae; sclerotized tip with strong, hook like projection pointing forward ( Fig. 2–3 , 18 ); posterior part provided with diagonal furrow ( Fig. 17– 20 )). ABDOMEN: ovoid; dorsum soft portions pale white, with dark posterior end. Spinnerets ( Fig. 26–28 ): ALS with four spigots, PMS with one spigot, PLS with two spigots. LEGS: white. patella plus tibia I shorter than carapace (TL/CL ≈ 0,76). GENITALIA ( Figs. 3 , 12–16 , 29–34 ): Palp patella attached to tibia basally; tibia one to two times as wide as femur; cymbium yellow, without distal patch of setae; bulb yellow, stout, tapering apically, with retrolateral side strongly protruding; embolus dark, short, cylindrical at base, flattened at extremity, distally with shallow, ventral groove, ending in well developed triangular tooth at edge of distal, slightly concave, platform. FIGURES 1–11. Orchestina acaciae , new species . 1. Male (Ht, PBI_OON 00033858), habitus, dorsal view. 2. Male (Pt, PBI_OON 00033857), ventral view. 3. Male (Ht, PBI_OON 00033858), mouthparts and palps, ventral view. 4. Male (Pt, PBI_OON 00033857), habitus, lateral view. 5. Same, frontal view. 6. Female (Pt, PBI_OON 00033861), habitus, dorsal view. 7. Female (Pt, PBI_OON 00033859), lateral view. 8. Female (PBI_OON 00033859) genital area, ventral view. 9. Female (Pt, PBI_OON 00033875) genitalia, ventral view. 10–11. Female (Pt, PBI_OON 00033859) genitalia, dorsal view. ARe: anterior receptaculum; AUS: anterior uterine sclerite; Pp: posterior plate; Po: pocket; Pr: lateral protrusion. FEMALE (PBI_OON_0033861, Figs. 6–11 , 35–37 ). As in male except as noted. Total length 1.25. CEPHA- LOTHORAX: Sternum yellow, anterior margin unmodified. Mouthparts: Chelicerae, endites and labium yellow. Labium anterior margin indented at middle. ABDOMEN: with short posterior extension; dorsum soft portions yellow. Spinnerets: PMS with two spigot, PLS with three spigots. GENITALIA ( Figs. 8–11 , 35–37 ): Shape: fairly complex, exterior with small circular sclerotized depressions (Po) near posterior margin on each side of central longitudinal dark area (AUS), latter with one recurved arc shape anteriorly (Pr); ARe, when visible, oval, with anterior margin under Pr more or less parallel with posterior margin of Pr ( Fig. 9 ). Internally, anterior uterine sclerite (AUS) long and broad, tongue-shaped, with recurved lateral protrusions (Pr) originating from its distoventral surface; anterior receptaculum (ARe) egg-shaped, laterally expanded, attached to mid-ventral surface of AUS ( Figs. 9 , 36, 37 ); posterior plate (Pp) bowl-shaped ( Fig. 9, 10 , 35 ), covers dorsal surfaces of ARe and most of AUS; posterior receptaculum absent. FIGURES 12–16. Orchestina acaciae , new species , male palp (Pt, PBI_OON 00033857). 12. Retrolateral view; 13. Prolateral view. 14. Anterior view; 15. Posterior view. 16. Dorsal view. MATERIAL EXAMINED: TANZANIA : Mkomazi Game Reserve , tropical savanna, canopy, -3.88333°, 37.88333°, Apr. 15, 1995 , McGavin G.C. , 1♂ ( MRAC 228783 , PBI _OON 16799); as previous, 1♀ paratype ( MRAC PBI _OON 16801) ; as previous, Dec. 31, 1995 , 1♀ ( MRAC 228787 , PBI _OON 16800) ; as previous, Dec. 30, 1995 , 1♂ paratype ( MRAC , PBI _OON 33146) ; as previous, Dec. 30, 1995 , 1♀ paratype ( OUMNH , PBI _OON 33422) ; as previous, Apr. 12, 1995 , 1♂ paratype ( OUMNH , PBI _OON 33662) ; as previous, Dec. 30, 1995 , 1♂ paratype ( OUMNH , PBI _OON 33663) ; as previous, Aug. 10, 1994 , 1♂ paratype ( OUMNH PBI _OON 33658) ; as previous, Sept. 01, 1997 , 1♂ paratype ( OUMNH PBI _OON 33659) ; as previous, Apr. 07, 1995 , 1♂ paratype ( OUMNH PBI _OON 33660) ; as previous, Jan. 02, 1996 , 1♂ paratype ( OUMNH PBI _OON 33661) ; as previous, Apr. 13, 1995 , 1♀ paratype ( MRAC , PBI _OON 33664) ; as previous, Jan. 06, 1996 , 1♂ paratype ( OUMNH , PBI _OON 33665) ; as previous, Dec. 30, 1995 , 1♂ paratype ( OUMNH , PBI _OON 33668) ; as previous, Apr. 12, 1995 , 1♂ paratype ( MRAC , PBI _OON 33856) ; as previous, Jan. 06, 1996 , 1♂ paratype ( OUMNH , PBI _OON 33857) ; as previous, Dec. 31, 1995 , 1♀ paratype ( OUMNH PBI _OON 33859) ; as previous, Jan. 02, 1996 , 1♀ paratype ( OUMNH , PBI _OON 33860) ; as previous, Jan. 06, 1996 , 1♀ paratype ( OUMNH , PBI _OON 33861) ; as previous, Dec. 30, 1995 , 1♀ paratype ( MRAC , PBI _OON 33900) ; as previous, Feb. 01, 1996 , 1♀ paratype ( MRAC PBI _OON 33874) ; as previous, Feb. 01, 1996 , 1♀ paratype ( MRAC PBI _OON 33875) . FIGURES 17–28. Orchestina acaciae , new species . 17. Male (Pt, PBI_OON 00033856), prosoma, ventral view. 18. Male (Pt, PBI_OON 00033146), mouthparts, ventral view. 19. Male (Pt, PBI_OON 00033146), endites and chelicerae, ventrolateral view. 20. Male (Pt, PBI_OON 00033146), mouthparts, ventrolateral view. 21. Male (Pt, PBI_OON 00033856), pedicel, ventral view. 22. Male (Pt, PBI_OON 00033856), trichobothrium, tibia I, dorsal view. 23. Male (Pt, PBI_OON 00033856), trichobothrium, metatarsus I, dorsal view. 24. Male (Pt, PBI_OON 00033146), chelicerae, ventrolateral view. 25. Male (Pt, PBI_OON 00033856), anterior view. 26. Female (Pt, PBI_OON 00033664), left spinnerets, ventral view. 27. Female (Pt, PBI_OON 00033664), ALS, ventral view. 28. Female (Pt, PBI_OON 00033664), PLS, ventral view. FIGURES 29–37. Orchestina acaciae , new species , genitalia. 29. Male (Pt, PBI_OON 00033856) palp, retrolateral view. 30. Same, anterior view. 31. Same, tarsal organ on cymbium. 32. Embolus, distal tip, anterior view; arrow showing triangular tooth in distal groove; 33. Same, Retrolateral view. 34. Same, ventral view. 35. Female (Pt, PBI_OON 00033350) genitalia, dorsal view. 36. Same, dorsal plate removed. 37. Same, lateral view. ARe: anterior receptaculum; AUS: anterior uterine sclerite; Pp: posterior plate; Pr: lateral protrusion. DISTRIBUTION: Known only from the Mkomazi Game Reserve in northern Tanzania ( Fig. 606 ).