Belisana tarang Zhu & Li 2021
- Dataset
- Six new species of the spider genus Belisana (Araneae: Pholcidae) from Southeast Asia
- Rank
- SPECIES
- Published in
- Zhu, Wenhui, Li, Shuqiang (2021): Six new species of the spider genus Belisana (Araneae: Pholcidae) from Southeast Asia. Zootaxa 4963 (1): 115-137, DOI: 10.11646/zootaxa.4963.1.5
Classification
- kingdom
- Animalia
- phylum
- Arthropoda
- class
- Arachnida
- order
- Araneae
- family
- Pholcidae
- genus
- Belisana
- species
- Belisana tarang
description
Description. Male (holotype, IZCAS Ar 41916): Total length 1.46 (1.54 with clypeus), carapace 0.63 long, 0.63 wide, opisthosoma 0.91 long, 0.69 wide. Leg I missing (see variation), leg II: 7.45 (2.03 + 0.25 + 1.88 + 2.63 + 0.66), leg III: 3.23 (0.88 + 0.13 + 0.88 + 1.09 + 0.25), leg IV: 5.07 (1.47 + 0.19 + 1.19 + 1.63 + 0.59). Distance PME-PME 0.06, diameter PME 0.08, distance PME-ALE 0.08, AME absent. Habitus as in Figs 12 E – F. Carapace pale, with yellow median marks. Ocular area not elevated. Clypeus unmodified. Chelicerae (Figs. 12 C, 15 F) with pair of small proximo-lateral apophyses and pair of long, curved distal apophyses, each with sclerotized and pointed tip (distance between tips of distal apophyses: 0.23). Sternum pale, approximately as wide as long (0.38). Thoracic furrow absent. Legs pale, without darker rings. Opisthosoma pale, without spots. Palps as in Figs 11 A – B; coxa unmodified; trochanter with short retrolatero-ventral apophysis; femur with small proximo-dorsal apophysis (arrow in Fig. 11 B); procursus (Figs 11 A – D, 13 K – L) curved (arrow in Fig. 11 A), complex distally, with large, nearly triangular subdisto-prolateral sclerite (arrow 1 in Figs 11 C, 13 K), small subdisto-dorsal sclerite (arrow 2 in Figs 11 C, 13 K), large distal membranous process (arrow in Figs 11 D, 13 L) and triangular retrolateral membranous flap (arrow f in Figs 11 D, 13 L); bulb (Fig. 12 D) with short, hooked apophysis and simple embolus. Legs with short vertical setae on metatarsi, without spines and curved setae. Female (IZCAS Ar 41918): Similar to male, habitus as in Figs 12 G – H. Total length 1.39 (1.47 with clypeus), carapace 0.47 long, 0.47 wide, opisthosoma 1.00 long, 0.94 wide. Tibia I: 1.75; tibia I L / d: 29. Distance PME-PME 0.07, diameter PME 0.06, distance PME-ALE 0.07, AME absent. Sternum slightly wider than long (0.38 / 0.34). External female genitalia (Figs 12 A, 14 I) simple and flat, with pair of frontal “ epigynal ” pockets (arrow ep in Figs 12 A – B, 14 I – J), 0.34 apart. Vulva (Figs 12 B, 14 J) with W-shaped anterior arch and pair of long, narrow pore plates (arrow pp in Figs 12 B, 14 J), without serrated sclerites. Variation: In male paratype (IZCAS Ar 41917): Leg I: 10.57 (2.66 + 0.28 + 2.72 + 3.75 + 1.16); tibia I L / d: 45. Retrolateral trichobothria of tibia Iat 7 % proximally; tarsus Iwith 16 distinct pseudopodomeres. Natural history. The species was found in leaf litter and collected by small plot direct searching.
description
Figs 11 – 12, 13 K – L, 14 I – J, 15 F
diagnosis
Diagnosis. This species resembles B. sandakan Huber, 2005 (see Huber 2005: 59, figs 360 – 375) with the same shape of the bulbal apophyses (Fig. 12 D), but males can be distinguished by the presence of a nearly triangular subdisto-prolateral sclerite (arrow 1 in Figs 11 C, 13 K) and triangular retrolateral membranous flap (arrow f in Figs 11 D, 13 L) on the procursus (Figs 11 A – D, 13 K – L), and by having the cheliceral distal apophyses directed laterally (arrow da in Figs. 12 C, 15 F; distal apophyses directed downward in B. sandakan). Females can be distinguished by having the frontal “ epigynal ” pockets laterally on a sclerotized plate (arrow ep in Figs 12 A – B, 14 I – J) and a long vulval anterior arch, 2 / 3 of the vulva length (Figs 12 B, 14 J) (vs. short vulval anterior arch, 1 / 2 of the vulva length). It can also distinguished by a longer total body length (total body length <1.4, “ tiny ” size in B. sandakan, Huber 2005: 3).
distribution
Distribution. Indonesia (Sumatra, type locality only; Fig. 16).
etymology
Etymology. The specific name refers to the type locality and is a noun in apposition.
materials_examined
Type material. Holotype: Male (IZCAS Ar 41916), near entrance of Tarang Cave (0 ° 12 ’ 39.18 ” N, 100 ° 24 ’ 58.62 ” E, elevation 877 m), Bukittinggi, West Sumatra, Sumatra, Indonesia, 13 May 2014, Z. Yao leg. Paratypes: 1 male (IZCAS Ar 41917) and 2 females (IZCAS Ar 41918 – 41919), same data as holotype.
Name
- Homonyms
- Belisana tarang Zhu & Li 2021