Cheiracanthium torsivum

Cheiracanthium torsivum, commonly known in Mandarin Chinese as "旋距紅螯蛛" or Twisted spur red chelate spider, is a species of yellow sac spider endemic to Taiwan. ^[1]

Cheiracanthium torsivum
Scientific classification
Domain:	Eukaryota
Kingdom:	Animalia
Phylum:	Arthropoda
Subphylum:	Chelicerata
Class:	Arachnida
Order:	Araneae
Infraorder:	Araneomorphae
Family:	Cheiracanthiidae
Genus:	Cheiracanthium
Species:	C. torsivum
Binomial name
Cheiracanthium torsivum Chen et Huang, 2012

Description

C. torsivum have a yellowish-brown carapace and yellow abdomen. ^[1] Their abdomen has a pale grayish brown cardiac pattern. They are distinguished from similar species by the shape of the male's pedipalps; the palpal bulb sports a spiniform apophysis and distally-intorted cymbial spur. Females are distinguished from those of other species by dark, globular markings that can be seen through the tegument of the epigynum.

Distribution

C. torsivum is found in northern and southeastern Taiwan at elevations between 500m and 1800m.^[1]

Etymology

"Torsivum," from the species name Cheiracanthium torsivum, means "spiral-twisted" and refers to the spiriform cymbial spur on the male's pedipalp.^[1]