Nephila clavipes

Palmgren, P., 1980, Some comments on the anatomy of spiders, Ann. Zool. Fennici 17, pp. 161-173 : 162

publication ID	Palmgren1980
DOI	https://doi.org/10.5281/zenodo.6282761
persistent identifier	https://treatment.plazi.org/id/8CDC748A-7BB0-1459-76D3-55DC097D2288
treatment provided by	Donat (2013-04-21 07:33:00, last updated 2023-11-29 16:57:01)
scientific name	Nephila clavipes
status

Treatment

Nephila clavipes View in CoL and maculata

The Nephila species (Figs. 5-9) have a very much stronger chelicerai m.antero-medialis verticalis than Azilia and thus resemble the Araneidae earlier dissected by me. N.clavipes has a cleft suspensor IV,. N.maculata a single one; this feature is apparently of little taxonomic value.

The anterior tergo-pedipalpal muscle [pa) is double-fanned in N. clavipes , but triple-fanned in.AT. maculata . The m. tergo-coxalis anterior profundus (c,, "anterior rotator") of the first leg arises in JV. clavipes as two broad portions; in N.maculata one of the portions is very narrow. None of the Nephila species has caecal pouches protruding between the tergo-coxal muscles. In JV clavipes the dorsal pouch is short. In JV. maculala it extends to the base of the chelicerae and sends a very narrow tube into them, a feature reminiscent of the Tetragnathidae . In this species the poison gland is short, while in JV. clavipes it extends to the dorsal apodeme. I have previously drawn attention to the apparent competition for space between the poison glands and the dorsal caecum.