Calapnita kubah , Bernhard A. Huber, 2017

Bernhard A. Huber, 2017, Revision and cladistic analysis of the Southeast Asian leaf-dwelling spider genus Calapnita Simon (Araneae, Pholcidae), Zootaxa 4219 (1), pp. 1-63: 15-17

publication ID 10.5281/zenodo.273086

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scientific name

Calapnita kubah

sp. nov.

Calapnita kubah  sp. nov. Figs 7–8View FIGURES 3 – 12, 33–44View FIGURES 33 – 37View FIGURES 38 – 44

Diagnosis. Males are easily distinguished from known congeners by morphology of male palps (heavily sclerotized appendix with three terminal tines; subdistally widened and sclerotized embolus; Figs 33View FIGURES 33 – 37, 39View FIGURES 38 – 44); females are difficult to separate from similar species ( C. deelemanae  , C. phasmoides  , C. subphyllicola  ), but seem to differ in their internal genitalia (pore plates not round; membranous ‘sac’ absent; Fig. 37View FIGURES 33 – 37).

Etymology. The species name is derived from the type locality; noun in apposition.

Material examined. Holotype. MALAYSIA-BORNEO: ♂, ZFMK ( Ar 15969), Sarawak, Kubah  National Park, along Main Trail (1.611°N, 110.191– 110.195°E), 160–200 m a.s.l., undersides of palm leaves, 13.vii.2014 (B.A. Huber, S.B. Huber).GoogleMaps 

Other material. MALAYSIA-BORNEO: 10♂ 9♀ 1 juv., ZFMK (Ar 15970–71), and 1♂ 1♀, SMK, same data as holotypeGoogleMaps  ; 5♀ in absolute ethanol, ZFMK (Bor 191), same dataGoogleMaps  . 2♂ 1♀, ZFMK ( Ar 15972), Sarawak, Kubah  National Park, near entrance to Waterfall Trail (1.606°N, 110.187°E), 300 m a.s.l., undersides of large palm leaves, 12.vii.2014 (B.A. Huber, S.B. Huber)GoogleMaps  ; 5♀ 3 juvs in absolute ethanol, ZFMK (Bor 222), same dataGoogleMaps  .

Description. Male (holotype)

MEASUREMENTS. Total body length 6.9, carapace width 1.1. Leg 1: 42.9 (10.1 + 0.5 + 10.3 + 20.0 + 2.0), tibia 2: 7.6, tibia 3: 4.5, tibia 4: 7.2; tibia 1 L/d: 98. Distance PME-PME 245 µm, diameter PME 115 µm, distance PME- ALE ~25 µm; no trace of AME.

COLOR. Prosoma mostly pale whitish, sternum with indistinct darker marks; legs pale ochre-yellow with dark brown patellae and tibia-metatarsus joints; abdomen monochromous pale ochre-gray.

BODY. Habitus as in Fig. 7View FIGURES 3 – 12; ocular area barely elevated ( Fig. 42View FIGURES 38 – 44), each triad on very low hump; carapace without median furrow; clypeus unmodified; sternum wider than long (0.70/0.64), unmodified.

CHELICERAE. As in Fig. 35View FIGURES 33 – 37, with pair of simple scaly apophyses ( Fig. 38View FIGURES 38 – 44) near lamellae and pair of indistinct lateral humps proximally; without modified hairs; without stridulatory ridges.

PALPS. As in Figs 33–34View FIGURES 33 – 37; coxa unmodified; trochanter with long retrolatero-ventral apophysis; femur without processes; procursus rather straight, long, with strong prolatero-ventral ‘knee’, with prolateral process at halflength continuing towards tip of procursus as transparent lamina; bulb with small membranous (but not wormshaped) proximal process; large appendix with three heavily sclerotized distal tines ( Fig. 39View FIGURES 38 – 44); long embolus arising from base of appendix, with distinctive sclerotized subdistal widening ( Fig. 39View FIGURES 38 – 44), with semitransparent tip.

LEGS. Without spines and curved hairs; few vertical hairs; retrolateral trichobothrium on tibia 1 at 2%; prolateral trichobothrium absent on tibia 1, present on other tibiae; tarsus 1 pseudosegments not visible in dissecting microscope.

Male (variation). Tibia 1 in 13 other males: 9.5–10.4 (mean 9.9).

Female. In general similar to male; eye triads slightly closer together (distance PME-PME 220 µm). Tibia 1 in 11 females: 7.6–9.2 (mean 8.4). Epigynum very simple, weakly sclerotized and folded ( Fig. 43View FIGURES 38 – 44), internal anterior arch visible through cuticle ( Fig. 36View FIGURES 33 – 37); with simple short posterior ‘knob’; internal genitalia as in Fig. 37View FIGURES 33 – 37.

Natural history. The spiders were only found on the undersides of palm leaves. At one site (“along Main Trail”), palms were common and spiders abundant; at the other site (“near entrance to Waterfall Trail”) palms were rare and so were spiders.

Distribution. Known from type locality in western Sarawak only ( Fig. 281View FIGURE 281).


Zoologisches Forschungsmuseum Alexander Koenig


Sarawak Museum