Clubiona cylindriformis, Dankittipakul & Singtripop, 2014

Dankittipakul, Pakawin & Singtripop, Tippawan, 2014, A new species-group of Clubiona Latreille, 1804 and descriptions of four new species from Borneo (Araneae, Clubionidae), Journal of Natural History (J. Nat. Hist.) 48 (31 - 32), pp. 1923-1936 : 1933-1935

Clubiona cylindriformis sp. nov.

( Figures 1B , 5A–C )

Diagnosis

Males of C. cylindriformis sp. nov. closely resemble those of C. cultrata sp. nov. in having the petal-shaped RTA; the cylindrical base of embolus freely emerging from the tegulum (cone-shaped in C. cultrata sp. nov.); the embolus being shorter and more slender (embolus blade-shaped and more elongate in C. cultrata sp. nov.). Males of both species possess a conspicuous, conical tubercle situated on the dorsal side of cymbium ( Figure 5C,E,F ).

Type material

Holotype. ♂, Malaysia, Borneo , Sarawak State , Serian District , Penrissen Road 12 miles (19 km) of Kuching , Sernonkok Wildlife Rehabilitation Centre : Nursery Centre of the Forest Department, 20–50 m, 8 December 1987, C. Lionhard leg. (MHNG, Sar-87/62).

Etymology

The specific epithet is a derived combination of Greek and Latin words (Gk. κυΛΙΝδΡΟϛ = cylindrus = cylindrical), referring to the shape of the embolic base.

Description

Male (holotype). Total length 5.8; prosoma 3.4 long, 3.0 wide; opisthosoma 3.2 long, 1.4 wide. Prosoma ovoid, convex, in profile highest mid-distance between PME and longitudinal fovea; integument smooth, devoid of hairs; carapace yellowish brown; chelicerae brown, with three promarginal and three smaller retromarginal teeth; labium and gnathocoxae pale brown; sternum pale yellow. Eye sizes and interdistances: AME 0.10, ALE 0.10, PME 0.20, PLE 0.18, AME–AME 0.10, AME–ALE 0.10, PME–PME 0.40, PME–PLE 0.32; MOQ: 0.30 long, 0.32 anterior width, 0.66 posterior width. Legs uniform pale yellow; scopulae on tarsi and metatarsi I–II distinct, in III–IV sparse. Leg formula 4213. Leg measurements: leg I 5.2 (1.6, 0.8, 1.2, 1.0, 0.6); leg II 6.8 (2.2, 0.8, 2.0, 1.2, 0.6); leg III 6.4 (1.6, 1.4, 1.4, 1.4, 0.6); leg IV 8.4 (2.4, 0.8, 2.2, 2.0, 1.0). Opisthosoma cylindrical, pale, without colour marking; dorsal scutum absent; one pair of muscle apodemes located mid-dorsally.

Palp ( Figures 1B , 5A–C ). Palpal tibia compressed on both sides, with heavily sclerotized, triangular VTA; RTA heavily sclerotized, petal-shaped in ventral view, rectangular in retrolateral view; cymbium with apicodorsal depression, basoretrolaterally with triangular tubercle, apex blunt; tegulum oblong, apical portion weakly sclerotized; conductor broad lamina, beak-shaped in ventral view, originating apico-retrolaterally; sperm duct U-shaped, elongate; embolic base cylindrical, situated apico-prolaterally, gradually tapering towards apex; embolus spiniform, apex sharply point, directed anteriad.

Female. Unknown.

Natural history

Type specimen of C. cylindriformis sp. nov. was collected by beating shrubs and lower vegetation in lowland forest.

Distribution

Known only from the type locality (Kuching, Borneo).

Figures

Figure 1. Male palp, ventral view (A–E), prolateral view (F), dorsal view (G). Clubiona apiculata sp. nov. (A,F,G). Clubiona cylindriformis sp. nov. (B). Clubiona cultrata sp. nov. (C). Clubiona conica sp. nov. (D). Clubiona cf. hystrix (E).

Figure 5. Clubiona cylindriformis sp. nov.; male holotype (A–C). Clubiona cultrata sp. nov.; male holotype (D–F). Male palp: (A,D) ventral view; (B,E) prolateral view; (C,F) retrolateral view. Scale bars: 0.1 mm.