Orchestina acaciae, Henrard & Jocqué, 2012

Henrard, Arnaud & Jocqué, Rudy, 2012, 3284, Zootaxa 3284, pp. 1-104 : 16-20

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.

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.

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) .

DISTRIBUTION: Known only from the Mkomazi Game Reserve in northern Tanzania ( Fig. 606).