Orchestina kasuku, Henrard & Jocqué, 2012

Henrard, Arnaud & Jocqué, Rudy, 2012, 3284, Zootaxa 3284, pp. 1-104 : 64-66

Orchestina kasuku new species

Figures 378–416, 606

TYPE: Holotype Male : Democratic Republic of the Congo, Mbangi, Old secondary forest, canopy, 2.11666°, 21.73333°, June 26, 2009, D. Debakker ( MRAC 228649 PBI _OON 33878).

ETYMOLOGY: The species name ‘kasuku’ (Swahili for parrot) is a noun in apposition and refers to the infraocular swelling in the male. It also refers to the father of the first author René Henrard, alias ‘Kasuku’.

DIAGNOSIS: The male of O. kasuku is recognized by the combination of a huge, inflated palpal tibia, the pearshaped bulbus ( Figs. 385–386), the eyes in loose arrangement ( Figs. 378, 391), the infra-ocular swelling ( Figs. 381, 390, 391) and the long ribbon-like modified setae on the labium ( Fig. 381, 395, 396). The female is recognized by the straight, narrow AUS flanked by a pair of rebordered shallow pockets ( Fig. 388).

MALE (PBI_OON_0033878). Total length 1.10. CEPHALOTHORAX: Carapace ( Figs. 378, 380, 381, 389) yellow-brown, broadly oval in dorsal view (CW/CL ≈ 0.88), pars cephalica domed in lateral view, anteriorly narrowed to between 0.5 and 0.75 times its maximum width. Clypeus very high, ALE separated from edge of carapace by more than two times their diameter, vertical in lateral view; in front of PME with semicircular, beak shaped plate with few pores ( Figs. 381, 390, 391). Eyes ALE-PME separated by less than ALE radius, PME circular; PLE- PME separated by PME radius to PME diameter. Sternum longer than wide, yellowish white, anterior margin unmodified, posterior margin extending posteriorly beyond anterior edges of coxae IV as single extension, sternum with pattern of tiny sepia spots forming central longitudinal band and vague intercoxal triangles along margin; setae abundant, evenly scattered. Mouthparts: Chelicerae, endites and labium yellow. Chelicerae ( Fig. 397) straight; retromargin without teeth. Labium ( Figs. 392–396) piriform, anterior margin indented at middle, same as sternum in sclerotization, color pattern of tiny sepia spots forming two oval, adjacent areas near posterior margin; with 6 or more setae ( Figs. 395, 396) on anterior margin, subdistal region provided anteriorly with group of five needle like setae, medially with one pair of large symmetric flattened setae in the centre, followed posteriorly by one pair of large asymmetric flattened setae, positioned in a slightly oblique longitudinal row. Endites serrula absent, anteromedian tip unmodified, same as sternum in sclerotization. ABDOMEN: globular; dorsum soft portions pale white, with gray netlike pattern. Book lung covers small, round, dented. Pedicel ( Fig. 404) scutum absent, but abdomen extending anteriad of pedicel. Spinnerets: ALS ( Fig. 407) with four spigots, PMS ( Fig. 408) with one spigot, PLS ( Fig. 408) with two spigots. LEGS: yellow; patella plus tibia I near as long as carapace (TL/ CL ≈ 1,00), metatarsi ( Fig. 409) apical part provided with group of small modified, broom shaped setae on prolateral side of leg I, II and III; tarsi bearing claws ( Figs. 405, 406) with proximal tooth divided itself in three smaller teeth. Tarsus I superior claws with seven teeth on lateral surface of proclaw, seven teeth on lateral surface of retroclaw; tarsus IV superior claws with seven teeth on lateral surface of proclaw, seven teeth on lateral surface of retroclaw. Tarsal organ ( Figs. 400, 402, 403) pear shaped; palpal tarsal organ ( Fig. 413) piriform, with three sensilla, in its retrolateral vicinity with conical outgrowth. Leg spines absent. GENITALIA: Epigastric region ( Figs. 398, 399) with sperm pore small, narrow, slit-like, situated at level of anterior spiracles, unmodified. Palp ( Figs. 385, 386, 410–413) proximal segments yellow; patella attached to tibia sub-basally; tibia reniform, two to three times as wide as femur; cymbium pale orange; bulb pale orange, stout, pear shaped; embolus dark, long, needle-like, at almost right angle with long axis of bulbus.

FEMALE (PBI_OON_0033881). As in male except as noted. Total length 1.20. CEPHALOTHORAX: Carapace ( Figs. 382–383) ovoid in dorsal view (CW/CL ≈ 0.77), pars cephalica strongly elevated in lateral view. Clypeus sloping forward in lateral view. Eyes ALE-PME touching. Endites serrula present in single row. ABDO- MEN: without long posterior extension, rounded posteriorly. Spinnerets: PMS with two spigots, PLS with three spigots. LEGS: patella plus tibia I near as long as carapace (TL/CL ≈ 0,92). GENITALIA ( Figs 387, 388, 414– 416): Ventral view with straight, tube shaped structure (AUS) visible through cuticle, darkest anteriorly, forming small spot; with two paramedian pockets. Dorsal view with AUS straight and narrow, probably folded over apically, with pair of Pr; ARe not visible in our preparations but probably fused with AUS anteriorly; posterior receptaculum absent.

MATERIAL EXAMINED: DEMOCRATIC REPUBLIC OF THE CONGO: Equateur: Mbangi , Old secondary forest, canopy, 2.11666°, 21.73333°, June 23, 2009, De Bakker D. & Juakaly J.-L., 1♀ paratype ( MRAC PBI _OON 33140) ; as previous, 1♂ paratype ( MRAC 228650 PBI _OON 33879); as previous, 1♂ paratype ( MRAC 228646 PBI _OON 33880);as previous 1♀ paratype ( MRAC 228651 PBI _OON 33883); as previous, 1♀ paratype ( MRAC 228647 PBI _OON 33903); as previous, 3♀ paratypes ( MRAC 228652 PBI _OON 33904); as previous, 2♂ paratypes ( MRAC 228653 PBI _OON 33905); as previous, 1♀ paratype ( MRAC 228654 PBI _OON 33906); as previous, 4♀ paratypes ( MRAC 228655 PBI _OON 33907); as previous, 2♂ paratypes ( MRAC 228656 PBI _OON 33908); as previous, 1♂ paratype ( MRAC 228658 PBI _OON 33964); as previous, 1♀ paratype ( MRAC 228657 PBI _OON 33978); as previous, June 25, 2009, 1♀ paratype ( MRAC 228645 PBI _OON 33881); as previous, 1♀ paratype ( MRAC 228648 PBI _OON 33882) .

DISTRIBUTION: Known only from the type locality: Mbangi in DR Congo ( Fig. 606).