Kalimagone rotunda, Tanasevitch, 2017

Tanasevitch, Andrei V., 2017, New genera and new species of the family Linyphiidae from Borneo, Sumatra and Java (Arachnida, Araneae), Revue suisse de Zoologie 124 (1), pp. 141-155 : 146-148

Kalimagone rotunda sp. nov.

Figs 27-30 , 42-45

Holotype: Male; Borneo, East Malaysia, Sabah, Tambunan District, Crocker Range, W slope , ca 1600 m a.s.l., 51-52 km from road Kota Kinabalu to Tambunan , rainforest with Lithocarpus , Castanopsis and tree ferns, plant debris in wet ravine and at forest edge, sifting; 18.V.1987; leg. D. Burckhardt & I. Löbl [# 30a ].

Paratypes: 5 females; collected together with the holotype.

Etymology: The specific name is a Latin adjective meaning “rounded”, referring the shape of the distal part of the distal suprategular apophysis.

Diagnosis: The species is characterized by the peculiar shape of the palpal tibia and the rounded distal part of the distal suprategular apophysis in the male, as well as by the bean-shaped receptacles in the female.

Description: Male (paratype). Total length 1.77, habitus as shown in Fig. 27 . Carapace unmodified, 0.80 long, 0.65 wide, pale brown, with indistinct, grey, radial stripes and darker margin; sulci absent. Chelicerae long 0.35. Legs yellow. Leg I 3.61 long (0.95+0.25+0.93+0.85+0.63), leg IV 3.39 long (0.90+0.23+0.85+0.88+0.53). Chaetotaxy 2.2.1.1, length of spines about 1.5-2 diameters of segment. TmI 0.59. All metatarsi with a trichobothrium. Palp ( Figs 42-44 ): Tibia conically elongated. Paracymbium L-shaped. Tegulum small, narrow, pale. Distal suprategular apophysis flat, long and wide, with a clawshaped median apophysis (MA in Fig. 43 ). Distal part of distal suprategular apophysis rounded, expanded, carrying tiny denticles, bent apically. Radix small, flat, embolus relatively long and narrow. Abdomen 1.05 long, 0.70 wide, dorsal pattern as shown in Fig. 27 .

Female. Total length 1.93, habitus as shown in Fig. 28 . Carapace unmodified, 0.78 long, 0.70 wide. Chelicerae 0.35 long. Leg I 3.19 long (0.88+0.25+0.80+0.73+0.53), leg IV 3.04 long (0.88+0.23+00.80+0.70+0.43). Chaetotaxy 2.2.1.1, length of spines about 2-2.5 diameters of segment. TmI 0.59. Abdomen 1.25 long, 0.78 wide, dorsal and ventral pattern as shown in Figs 28 and 29 , respectively. Epigyne ( Figs 29-30 , 45 ): median plate with parallel or slightly posteriorly convergent edges, receptacles bean-shaped. Body and leg coloration as in male.

Taxonomic remarks: The species is very similar to K. cuspidata , but can easily be distinguished by the rounded, serrate distal part of the distal suprategular apophysis in the male, as well as by the shape of the median plate of the epigyne and the bean-shaped receptacles in the female.

Distribution: Known only from the type locality in the northeast of Borneo Island.

Figures

Figs 22 - 34. Photographs of Kalimagone cuspidata sp. nov., male and female paratypes from Mt Kinabalu (22 - 26), of K. rotunda sp. nov., male holotype and female paratype (27 - 30), and of Oedothorax bifoveatus sp. nov., male and female paratypes from Cibodas Botanical Garden (31 - 34). (22 - 23, 27) Male habitus. (31) Male cephalothorax, lateral view. (24, 28, 32) Female habitus. (25, 29, 33) Female abdomen, ventral view. (26, 30, 34) Epigyne, ventral view.

Figs 35 - 45. Kalimagone cuspidata sp. nov., male and female paratypes from Mt Kinabalu (35 - 41), and Kalimagone rotunda sp. nov., male holotype and female paratype (42 - 45). (35, 42) Right palp, retrolateral view. (36, 43) Right palp, prolateral view. (37) Palpal tibia and paracymbium, retrolateral view. (38, 44) Palpal tibia, dorsal view. (39 - 40) Distal suprategular apophysis and embolic division, different aspects. (41, 45) Epigyne, ventral view.