Eridantes
Crosby & Bishop, 1933
dwarf spiders
Species Guides
1Eridantes is a of dwarf spiders ( Linyphiidae, Erigoninae) established by Crosby & Bishop in 1933. The genus contains three described : E. diodontos, E. erigonoides, and E. utibilis. It is distinguished from similar genera by two proposed synapomorphies: the mesal (rather than ectal) position of the paracymbium, and the broadly divided and of the largely membranous radix. Species-level identification relies on detailed morphological characters including cephalic lobe height, prosomal pit position, male palpal tibia form, and the convolution of the m-shaped carinae of the female .
Pronunciation
How to pronounce Eridantes: /ˌɛrɪˈdæntiːz/
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Identification
-level identification requires examination of male genitalia: the paracymbium is positioned mesally rather than ectally, and the radix has broadly divided and with largely membranous structure. identification uses cephalic lobe height, prosomal pit position, and male palpal tibia form. Females are distinguished by the convolution pattern of the m-shaped carinae of the . These characters require microscopic examination and comparison with or detailed illustrations.
Distribution
North America. E. diodontos is known from Arizona, United States, and San Luis Potosí, Mexico. The broader geographic range of the and other is not detailed in available sources.
Similar Taxa
- Other Erigoninae generaDistinguished by the mesal position of the paracymbium and the broadly divided and of the membranous radix—features proposed as synapomorphies unique to Eridantes.
More Details
Taxonomic history
The was established in 1933 and has received limited taxonomic attention. A 2013 revision described E. diodontos as a new and provided a revised based on examination of the type species E. erigonoides and the new species.