Calapnita semengoh Huber, 2011

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 : 23

Calapnita semengoh Huber, 2011

Figs 19 , 72–80

Calapnita semengoh Huber, 2011: 55 , figs 45, 67–69, 189–193 (♂ ♀).

Diagnosis. Easily distinguished from closest known relatives ( C. bankirai , C. bidayuh , C. phyllicola ) by extremely elongated male pedipalps and female external genitalia (figs 189–190, 192 in Huber 2011); from C. phyllicola also by presence of split hair dorsally on procursus ( Figs 76–77 ); from C. bidayuh also by absence of spine-like process distally on procursus. From other species of phyllicola group (except C. bankirai , C. bidayuh , C. phyllicola ) by shape of appendix (widely curved with two ventral tines; fig. 189 in Huber 2011), by male palpal tarsal organ on cylindrical process of tarsus ( Fig. 73 ), by serrated edge of embolus ( Fig. 75 ), and by drop-shaped pore plates (fig. 193 in Huber 2011).

New material examined. MALAYSIA-BORNEO: 10♂ 10♀, ZFMK ( Ar 15999–16000), and 1♂ 1♀, SMK, Sarawak, Semengoh Arboretum (type locality), Masing Trail (1.397– 1.399°N, 110.317– 110.322°E), 60–80 m a.s.l., undersides of leaves, 17.vii.2014 (B.A. Huber) ; 4♂ 5♀ 2 juvs in absolute ethanol, ZFMK (Mal 228), same data .

Notes. The original description failed to mention the single split hair dorso-distally on the procursus ( Figs 76– 77 ). Tibia 1 in 11 males: 8.6–9.5 (mean 9.2); 11 females: 7.1–7.7 (mean 7.4).

Natural history. All newly examined specimens were collected at a single large patch of herbaceous plants with large leaves in a swampy area of the forest. During several hours of collecting, no further specimens were found in other parts of the forest. At least some males were apparently without any web, but most specimens had sheets of fine silk directly attached to leaf surface (visible only from the side and against the light).

Distribution. Known from type locality in western Sarawak only ( Fig. 282 ).

Figures

FIGURE 282. Known distribution of the Calapnita phyllicola group, part 2 (cf. Fig. 281). Note that all western specimens of C. phyllicola are assigned tentatively.

FIGURES 13 – 19. Live specimens, Calapnita phyllicola group. 13 – 15. C. phyllicola Deeleman-Reinhold, ♂♂ from Bako and Ulu Dong, ♀ with parasitized egg-sac from Gunung Liang. 16 – 17. C. bidayuh sp. nov., ♂♂ from Kapit. 18. C. bankirai sp. nov., ♂ (with mite; arrow) from Niah. 19. C. semengoh Huber, ♂ from Semengoh.

FIGURES 72 – 80. Calapnita semengoh Huber, SEM micrographs (ZFMK, Ar 15999 – 16000). 72. Male chelicerae, oblique frontal view. 73. Male palpal tarsal organ. 74. Basis of left bulb, prolateral view (arrow points at membranous process; asterisk marks unidentified structure). 75. Detail of embolus, showing serrated edge. 76. Tips of procursus and embolus (arrow points at sperm duct opening). 77. Split hair on procursus. 78. Male ALS. 79. Female prosoma, frontal view. 80. Epigynum, ventral view. b, genital bulb; e, embolus; p, procursus. Scale lines: 10 µm (73, 75, 77, 78), 50 µm (74), 100 µm (72, 76, 79, 80).