Orchestina cornuta, Henrard & Jocqué, 2012

Henrard, Arnaud & Jocqué, Rudy, 2012, 3284, Zootaxa 3284, pp. 1-104 : 35-40

Orchestina cornuta new species

Figures 138–170, 606

TYPE: Holotype Male : Cameroon, Faro Game Reserve, tropical savanna, canopy, 8.38583°, 12.83333°, Nov.10, 2006, R. Jocqué, K. Loosveldt, L. Baert and M. Alderweireldt ( MRAC 228902 PBI _ OON 8987 ).

ETYMOLOGY: The specific name refers to the shape of the male endites which are provided with a horn-shaped extension (cornus).

DIAGNOSIS: The male of O. cornuta is easily recognized by the endites with a horn-shaped extension and a prolateral row of flattened setae ( Figs. 153, 157), the strongly enlarged bulb and the labium with leaf-shaped setae ( Figs. 139, 158–159). The female can be recognized by the stout cylindrical AUS with apical expansions (Pr) and circular arrangement of the dorsolateral extensions (Ex) ( Figs. 149, 150).

MALE (PBI_OON_00008987). Total length 1.13. CEPHALOTHORAX: Carapace ( Figs. 138, 142) yellowish white, broadly oval in dorsal view (CW/CL ≈ 0.81), pars cephalica strongly elevated in lateral view, anteriorly narrowed to between 0.5 and 0.75 times its maximum width. Clypeus vertical in lateral view. Eyes ALE-PME touching, PME circular; PLE-PME separated by less than PME radius. Sternum ( Fig. 139) as long as wide, yellow, with pattern of tiny sepia spots forming central longitudinal band and vague intercoxal triangles along margin, anterior margin with semicircular depression in the middle half, posterior margin extending posteriorly beyond anterior edges of coxae IV as single extension; setae abundant, evenly scattered. Mouthparts: Chelicerae, endites and labium ( Figs. 139, 151–159) yellow. Chelicerae ( Figs. 151, 154–156) straight; setae with group of three strong, converging setae on distal part of each chelicera; paturon laminate groove absent. Labium ( Figs. 152, 153, 158, 159) triangular, same as sternum in sclerotization, anterior margin concave at middle, laterally with short and wide extension; medially with three setae in raised sockets; with group of four needle like subdistal setae, central area with two pairs of flattened, leaf shaped setae and with a single small flattened setae at middle. Endites ( Figs. 152, 153, 157): serrula absent, same as sternum in sclerotization, medially depressed and ridged along margin; anteromedian with one strong, tooth-like projection pointing forward; dorsal face with one small medial swelling. ABDOMEN ( Figs. 138, 142): ovoid; dorsum soft portions pale white, with gray netlike pattern. Book lung covers small, round, with dented texture. Pedicel unmodified, scutum absent, but abdomen not extending anterior of pedicel. Epigastric area ( Fig. 167) protruding, provided anteriorly with needle-like setae and centrally with group of short setae. Spinnerets: ALS with five spigots, PMS with one spigot, PLS with two spigots. LEGS: yellow; patella plus tibia I longer than carapace (TL/CL ≈ 1.33), tarsi bearing claws with proximal tooth divided itself in smaller teeth, tibia I proximally with two strong ventral spines ( Fig. 169); tarsus I superior claws ( Fig. 168) with eight teeth on lateral surface of proclaw, eight teeth on lateral surface of retroclaw. Tarsal organ ( Fig. 170) pear shaped; palpal tarsal organ piriform ( Figs. 165, 166) in transverse, slightly-oblique axis, with raised margin and knob-like excrescence in vicinity of narrow part. GENITALIA: Epigastric region ( Fig. 167) with sperm pore small, narrow, slit-like, situated in front of anterior spiracles. Palp ( Figs 144–146, 160–166); proximal segments yellow; femur with ventral depression near base; patella attached to tibia sub-basally; tibia ovoid in lateral view, more than twice as wide as femur; cymbium yellow, without distal patch of setae, rounded; bulb white, stout, tapering apically, piriform, as wide as tibia; embolus dark, of medium length, tube-shaped, at angle of about 135° with bulb, flattened and widened at extremity, with outer margin raised and folded inward.

FEMALE (PBI_OON_0033868). As in male except as noted. Total length 1.34. CEPHALOTHORAX: Carapace ( Figs. 140, 143) yellow, broadly oval in dorsal view (CW/CL ≈ 0.78). Sternum ( Fig. 141) anterior margin unmodified Mouthparts: Labium anterior margin indented at middle. ABDOMEN ( Figs.140, 141, 143): without long posterior extension, rounded posteriorly. Spinnerets not examined. LEGS: patella plus tibia I nearly as long as carapace (TL/CL ≈ 1.06). GENITALIA( Figs. 147–150): Ventral view as seen through cuticle: anterior part with strongly sclerotized anvil-shaped structure (AUS), basally with narrow, faint transverse band slightly recurved in centre (Ex); both parts connected by two longitudinal, parallel, opaque, tubular structures (ARe?). Dorsal view: AUS small, cylindrical, anteriorly with two lateral knobs (Pr?), probably fused with ARe at base; ARe visible as two longitudinal, parallel, semitransparent, tubular structures; AUS + ARe surrounded by narrow hoop (Ex), interrupted anteriorly, with widened tips; posterior receptaculum absent.

MATERIAL EXAMINED: CAMEROON: Faro Game Reserve , tropical savanna, canopy, 8.38583°, 12.83333°, Nov. 25, 2005, R. Jocqué, K. Loosveldt, L. Baert and M. Alderweireldt, 1♂ paratype ( MRAC 228907 PBI _ OON 8988 ); as previous Apr. 22, 2007, 7♂ paratypes ( MRAC 228790 PBI _OON 16797); as previous, 1♀ paratype ( MRAC 228791 PBI _OON 16798); as previous, 7♂ paratypes ( MRAC 228790 PBI _OON 16797); as previous, Apr. 21, 2007, 1♀ paratype ( MRAC PBI _OON 33141) ; as previous, Apr. 22, 2007, 1♂ paratype ( MRAC PBI _OON 33142) ; as previous, July 21, 2007, 3♀ paratypes ( MRAC 228909 PBI _OON 33307); as previous, Apr. 26, 2007, 20♂ paratypes ( MRAC 228908 PBI _OON 33308); as previous, Apr. 22, 2007, 10♂ paratypes ( MRAC 228906 PBI _OON 33309); as previous, Apr. 28, 2007, 47♀ paratypes ( MRAC 228905 PBI _OON 33310); as previous, Apr. 26, 2007, 1♀ paratype ( MRAC 228903 PBI _OON 33311); as previous, Apr. 17, 2007, 1♀ paratype ( MRAC 228901 PBI _OON 33312); as previous, Apr. 28, 2007, 30♀ paratypes ( MRAC 228898 PBI _OON 33313); as previous, Apr. 27, 2007, 5♀ paratypes ( MRAC 228917 PBI _OON 33327); as previous, Apr. 27, 2007, 6♂ paratypes ( MRAC 228916 PBI _OON 33328); as previous, Apr. 28, 2007, 20♂ paratypes ( MRAC 228914 PBI _OON 33330); as previous, Apr. 21, 2007, 9♀ paratypes ( MRAC 228913 PBI _OON 33331); as previous, Apr. 21, 2007, 2♂ paratypes ( MRAC 228912 PBI _OON 33332); as previous, Apr. 22, 2007, 47♀ paratypes ( MRAC 228911 PBI _OON 33333); as previous, Apr. 27, 2007, 23♀ paratypess ( MRAC 228910 PBI _OON 33334); as previous, Apr. 28, 2007, 1♂ paratype ( MRAC 228900 PBI _OON 33867); as previous, Apr. 28, 2007, 1♀ paratype ( MRAC 228899 PBI _OON 33868); as previous, Apr. 28, 2007, 2♀ paratypes ( MRAC 228904 PBI _OON 33869); as previous, Apr. 23, 2007, 2♀ paratypes ( MRAC 228965 PBI _OON 33901) .

DISTRIBUTION: Only known from Faro Game Reserve in northern Cameroon ( Fig. 606).