The Find-a-Spider Guide

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Molycria quadricauda

Fact Box
Molycria quadricauda
(Platnick and Baehr)
(or a related and very similar species: see notes below)
(formerly in the Prodidomidae)
Body length:
female: 3.5 mm
male: 3 mm
This species probably spends most of its time in leaf litter
Unknown but this species is probably harmless to humans
Molycria mcleani
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Underneath female
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Female from above
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Male from above
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Male side view

There is no question that this spider belongs in the Subfamily Prodidominae (which in 2018 was moved into the Family Gnaphosidae after originally being in a separate family) and is a Molycria species because it perfectly matches the descriptions provided by Platnick and Baehr in their 2006 paper. However, it is possible that the spider shown above is not Molycria quadricauda because there are at least two other described Molycria species in the region of Central NSW where this spider was found and they all are quite similar in appearance.

Distinguishing features of this spider are its long, slender legs that lack obvious hair or spines and its extremely long anterior lateral spinnerets which are attached about half way along the underside of the abdomen and lie in parallel. These spinnerets are said to be particularly useful for catching ants, on which the spider feeds exclusively.

Spider(s) with a very similar appearance: Some other prodidomid species.

Email Ron Atkinson for more information.    Last updated 21 December 2018.