Belisana bachma 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 bachma
description
Description. Male (holotype, IZCAS Ar 41901): Total length 2.01 (2.16 with clypeus), carapace 0.98 long, 0.65 wide, opisthosoma 1.18 long, 0.80 wide. Leg I: 16.89 (4.55 + 0.19 + 4.42 + 6.67 + 1.15), leg II: 11.08 (3.21 + 0.18 + 2.75 + 4.17 + 0.77), leg III: 7.40 (2.24 + 0.16 + 1.86 + 2.56 + 0.58), leg IV: 10.61 (3.14 + 0.17 + 2.69 + 3.97 + 0.64); tibia I L / d: 55. Distance PME-PME 0.17, diameter PME 0.08, distance PME-ALE 0.11, AME absent. Habitus as in Figs 2 E – F. Carapace pale, with brown lateral margins. Ocular area with indistinct dark marks and not elevated. Clypeus brown, with frontal apophysis (arrow in Fig. 2 E) and pair of small ventral apophyses (arrow in Fig. 2 C). Chelicerae (Figs. 2 C, 15 A) 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: 0.38). Sternum pale, approximately as wide as long (0.50). Thoracic furrow absent. Legs pale. Opisthosoma pale, with indistinct large spots. Palp as in Figs 1 A – B; coxa unmodified; trochanter with short ventral apophysis with small retrolateral apophysis (arrow 1 in Fig. 1 B); femur with small proximo-dorsal apophysis (arrow 2 in Fig. 1 B); procursus (Figs 1 A – D, 13 A – B) simple proximally but complex distally, strongly protruding subdisto-dorsally (arrow in Fig. 1 A), with bifid disto-prolateral spine (arrow 1 in Figs 1 C, 13 A), large, curved subdisto-prolateral sclerite (arrow 2 in Figs 1 C, 13 A), disto-retrolateral membranous lamella (arrow in Figs 1 D, 13 B) and tongue-shaped retrolateral flap (arrow f in Figs 1 D, 13 B); bulb (Fig. 2 D) with hooked apophysis and simple embolus. Retrolateral trichobothria of tibia Iat 6 % proximally; legs with short, vertical setae on metatarsi, without spines or curved setae; tarsus Iwith 11 distinct pseudopodomeres. Female (IZCAS Ar 41903): Similar to male, habitus as in Figs 2 G – H. Total length 2.19 (2.32 with clypeus), carapace 0.75 long, 0.63 wide, opisthosoma 1.16 long, 0.81 wide. Tibia I: 3.70; tibia I L / d: 46. Distance PME-PME 0.13, diameter PME 0.08, distance PME-ALE 0.09, AME absent. Sternum approximately as wide as long (0.56). Ocular area without marks. External female genitalia (Figs 2 A, 14 A) simple and flat, with pair of frontal “ epigynal ” pockets (arrow ep in Figs 2 A – B, 14 A – B), 0.48 apart. Vulva (Figs 2 B, 14 B) with W-shaped anterior arch (median ridge strongly protruding, arrow in Figs 2 B, 14 B) and pair of large, nearly trapezoidal pore plates (arrow pp in Figs 2 B, 16 B), without serrated sclerites. Variation: Tibia Iin another male (IZCAS Ar 41902): 4.47. Natural history. The species was found in leaf litter and collected by small plot direct searching.
description
Figs 1 – 2, 13 A – B, 14 A – B, 15 A
diagnosis
Diagnosis. This species resembles B. babensis Yao, Pham & Li, 2015 (see Yao et al. 2015: 5, figs 1 – 3) with the elongated bulbal apophyses (Fig. 2 D) and vulval anterior arch of a similar dark internal shade (Figs 2 B, 14 B), but males can be distinguished by the presence of a strongly conical subdisto-dorsally protruding (arrow in Fig. 1 A) and bifid disto-prolateral spine (arrow 1 in Figs 1 C, 13 A) on the procursus, by the presence of a frontal apophysis (arrow in Fig. 2 E) and a pair of small ventral apophyses (arrow in Fig. 2 C) on the clypeus, and the cheliceral distal apophyses are directed laterally (arrow da in Figs. 2 C, 15 A; distal apophyses directed anteriorly in B. babensis). Females can be distinguished by having frontal “ epigynal ” pockets laterally on a sclerotized plate (arrow ep in Figs 2 A – B, 14 A – B) and the vulval pore plates are approximately as wide as long (arrow pp in Figs 2 B, 14 B).
distribution
Distribution. Vietnam (Thua Thien Hue, 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 41901), Bach Ma National Park (16 ° 13 ’ 45.78 ” N, 107 ° 50 ’ 53.46 ” E, elevation 371 m), Thua Thien Hue, Vietnam, 27 August 2015, D. S. Pham leg. Paratypes: 1 male (IZCAS Ar 41902) and 1 female (IZCAS Ar 41903), same data as holotype.
Name
- Homonyms
- Belisana bachma Zhu & Li 2021