Coremiocnemis kotacana, West & Nunn, 2010

West, Rick C. & Nunn, Steven C., 2010, 2443, Zootaxa 2443, pp. 1-64 : 46-50

Coremiocnemis kotacana sp. nov.

( Figs 152–172, 217)

Types: female holotype, S83759 , Ketambe Research Station (3º 41´N, 97º 39´E), Gunung Leuser National Park , Aceh Teneggara, Sumatra, col. S. Djojosudharmo, 9 Aug. 1986, QM – examined .

Etymology: A feminine Latin adjective based upon the name of the town of Kotacane, Aceh Teneggara, Sumatra, near where the specimen was collected.

Diagnosis: Differs from all other Coremiocnemis species in the elongated form of the cheliceral pegs (prolateral) and spines (retrolateral), the thickness of the anterior legs (most incrassate in group) and the eye sizes (ALE & PLE largest).

Description: Female holotype QM S83759 ( Figs 152, 153) with body length: 55.95.

Color (in alcohol): Uniformly pale yellow brown, with slightly darker abdomen. All setation is pallid.

Carapace ( Fig. 154): length 19.85, width 16.76 (width across anterior edge 10.75). Fovea 3.75 wide, procurved, deep, almost as wide as OT ( Fig. 155).

Eyes ( Fig. 155): OT; length 2.75, width 3.84. Anterior row transverse, posterior row slightly recurved. Eyes: ALE=PLE, AME, PME.

Chelicerae (left, Figs 168–172): length 12.12, width at base of each lobe 5.15 (bases widest point, dorsally). Ectal lyrate region a series of strikers (>80) in>7 horizontal rows ( Fig.169). Longest strikers on lowest rows. Each striker needleform, longest with filiform ends. Teeth, 12,>90 basomesals. Intercheliceral pegs>8 larger (2 very long),>40 smaller in tight cluster on basodorsal surface ( Fig. 172), pegs elongated. Retrolateral and basomedially with small cluster of short strong spines (>7 large,>20 small), point distad ( Fig. 170).

Maxillae ( Figs 156, 167): prolaterally plano-convex, anterior lobe well pronounced, many cuspules (> 200) on inner basoventral surface. Lyra ( Fig. 167): large number of bacilliform rods (>280) in dense, ovoid patch on prolateral maxillary surface, lowest row with>40 bacillae, longest rods medially in lowest rows. Rods paddle-shaped with medium to long shafts, largest with distal blades. At widest point, lyrate patch>10 rows deep, smallest rods dorsally. Posterior end of patch truncate, anterior end slightly pointed distad/ rounded. Dorsal to suture>40 small spines on anterior margin of maxillae, rows unordered.

Labium ( Fig. 157): length 3.05, width 4.07. Many small cuspules (>550) along anterior 1/3 surface.

Sternum ( Fig. 156): length 9.45, width 8.33. Slightly wider posteriorly than anteriorly, with thin even cover of short setae, interspersed with longer darker setae. No spines on edges of sternum. Posteriorly between left–right cox. IV, sternal border slightly acuminate, lateral sternal points slightly acuminate. On endocuticle between coxae III and IV, with small sparse pallid studs, thin hairlike setae emerge from them ( Figs 158, 159). Sternal sigilla: 3 pairs (not including labio-sternal sigilla), posterior medium size, ovoid morphology, 2.5 lengths apart, 1.0–1.5 of their length from sternal margin. Median pair 1/3 size of posterior, similar form, 0.5–0.8 of their length from sternal margin. Anterior pair somewhat obscured, border sternal margin. Labio-sternal sigilla larger than PSS.

Leg setation ( Figs 162–166): All segments distally with band of short blunt setae. IV with distinctly longer setae on all segments, most noticeable on tib., met. IV, giving “bottlebrush” appearance. Retrolaterally on met., tar. IV, longer setae with distinct recurvature.

Legs ( Figs 162–166): formula; length IV, I, II, III; width I, III, IV, II. Leg RF ~78.26. Leg lengths (fem., pat., tib., met., tar., total): palp: 11.16, 8.18, 8.00, 0.00, 7.35, 34.69. I: 14.66, 9.23, 11.35, 10.00, 6.25, 51.49. II: 12.46, 8.15, 9.16, 9.10, 5.87, 44.74. III: 10.95, 7.96, 8.00, 9.10, 5.95, 41.96. IV: 16.78, 8.95, 14.58, 17.85, 7.63, 65.79. Leg mid-widths (fem., pat., tib., met., tar., total.): palp: 3.27, 3,35, 3.37, 0.00, 3.05, 13.04. I: 3.68, 3.95, 3.42, 3.45, 3.01, 17.51. II: 3.67, 3.65, 3.12, 2.93, 2.75, 16.12. III: 4.07, 4.13, 3.47, 2.76, 2.76, 17.19. IV: 3.78, 4.23, 3.00, 2.8 5, 2.75, 16.61. Tar. IV almost uniform, no visible suture, but with pallid transverse region ( Figs 62, 64).

Scopula: Met. and tar. I–III undivided, met. and tar. IV divided. Met. I, II: entire, III: 4/5, IV: 1/2 prolateral side of division, 4/5 retrolaterally ( Fig. 163).

Coxae: some small black thorns prolatero-dorsally, no thorns retrolaterally on I–IV. Coxae easily seen dorsally. I longest, about 1.2 times length of II. IV widest, just longer than III, basally rectangular with defined corners. With small ventral thorns prolaterally on III–IV (small setae only on I–II). I–III ventrally with many long thick blunt setae proximally, pallid. No short black setae. IV with mixture of long thick blunt setae entirely with mix of longer setae most concentrated along retrolateral ledge (setae wavy), pallid intermixed with shorter thin pallid setae. Ventral I–IV gently sloping anteriorly. Retrolateral setation: I–III with median narrow light brush, IV entirely pallid. I–IV retrolaterally with ventral ledge. Ventral measurements for coxae: palp–length 9.63, width 5.35; I–9.35, 4.12; II–8.05, 4.56; III–8.16, 4.95; IV–8.26, 4.95. Trochantera: palp– length 3.27, width 3.65; I–3.86, 4.26; II–3.85, 3.85; III–3.27, 4.56; IV–3.72, 4.75.

Trichobothria: on all tarsi basal filiform field slightly wider than clavate field, merges evenly. Clavates on tar. I in distal 2/3, long filiforms only in basal 1/2, shorter filiforms intermixed with clavates distally. Clavate extent on II–IV cf. I, in distal 2/3. Shorter filiforms for length. Short epitrichobothrial field on I shorter than clavates, increasing in length proximally.

Tarsal organ not evident on legs I–IV under stereoscope (up to 64X).

Spines: met. I with 1 DV, met. II with 1 DV, 1 DPV, 1 DRV, met. III with 1 DV, 1 DPV, 1 DRV, 1 DD and met. IV with 2 DV, 1 DPV, 1 DRV, 1 DD, 1 DPL.

Claws: paired claws on all legs and palpal claw unarmed. Reduced third claw on leg IV.

Abdomen ( Fig. 161): ovular, elongated, yellow brown color (in alcohol), covered with mat of very fine short dark setae with sparse cover of longer pale yellowish setae. Longer hairs more concentrated ventrally toward spinnerets, point distad. Strongly darker anterior to booklung–epigynum areas.

Genitalia ( Fig. 160): epigastric fold 4.68. Spermathecae paired, not fused (base of each main lobe at 0.67 width, 1.5 of their lengths apart), bi-Iobular apically (medial lobes 1.72 length, laterals 1.70), each lobe dividing at 0.3 of total length proximally, with strong apical rounded appendages (apically swollen), heavily sclerotized cf. slightly weaker sclerotized shafts. Epigastric fold extends for ca. 2/3 length of medial spermathecal lobes.

Spinnerets: PMS: length 2.74, width (medially) 1.52. PLS: section lengths; basal 4.00, medial 3.15, apical 4.32. PLS section widths (medially); basal 2.10, medial 1.83, apical 1.65.

Distribution and natural history: C. kotacana is known only from the montane tropical rainforest that surround the Ketambe Research Station, Gunung Leuser National Park, Aceh Teneggara, Sumatra. Nothing is known about the natural history of this spider. The male is unknown.

Remarks: In 1986, the holotype of Coremiocnemis kotacana sp.nov. was collected from the Ketambe Research Station by the late primatologist and naturalist Dr Suharto Djojosudharmo, at Gunung Leuser National Park, Aceh Teneggara, Sumatra and subsequently sent to R. West as a possible " Selenocosmia sp. ".