The Find-a-Spider Guide

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Phoroncidia rotunda

Fact Box
Phoroncidia rotunda
as suggested by Robert Raven
and other arachnologists and as listed in the World Spider Catalog
Body length:
female: perhaps 3 mm
male: 1 mm
Phoroncidia species are said to catch insects during the evenings by waiting at the end of a single thread of sticky silk, but during the day they sit motionless on twigs
This spider is far too small to cause illness in humans
Phoroncidia rotunda
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Male, side view
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Underneath male
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The same species?
Click to enlarge
The same species?

This spider has the overarching, sometimes turret-like head region that is a characteristic of Phoroncidia species (see Agnarsson's paper) but is particularly noteworthy on males. The uniformly maroon-coloured upper surfaces of the species shown on this page distinguish it from other Phoroncidia species.

Spider(s) with a very similar appearance: The members of a number of other spider families, including the Anapidae, Micropholcommatidae (now incorporated into the Family Anapidae), Mysmenidae, Symphytognathidae and Tetrablemmidae, contain spiders that are very small and somewhat similar to this spider in overall appearance. However, all of these species are so small that they can be distinguished only with the aid of a stereo microscope.

Email Ron Atkinson for more information.    Last updated 15 July 2017.