[Title Page] [List of Genera] Comparison of Drawings] [Regional Keys to Genera] [Descriptions of New Taxa] [Geographical Distribution] [Color Photographs] See also Catalogue of Salticidae [ Title page] List of Genera - names beginning with: A BC DEFG HIJKL MN OPQ RS TUVWXYZ References: Authors beginning with: A BC DEFG HIJKL MN OPQ RS TUVWXYZ [See also Catalogue: Neobrettus]

Salticidae: Diagnostic Drawings Library

by Jerzy Proszynski 1997

Genus Neobrettus Wanless, 1984

Diagnoses of genera of South East Asia: Cryptic salticids, mottled brown or grey, stealthy and not seen to jump. on tree trunks and mossy rocks in rainforest. General remarks: Salticids in this group tend to be very cryptic and live in rainforest habitats although some specimens have been collected in gardens near rainforest. Those, such as some Spartaeus species, live on tree trunks and are difficult to spot. These can often be induce give themselves away by the collector moving his hand over an area close to the tree trun (a technique often used by entomologists). This long-legged spider does not jump but moves smoothly and quickly to another position - and even then can be difficult to spot. Large trees with buttresses, rather than those with plain rounded bases, seem to be preferred. A colony Neobrettus was found among dead fronds on a banana free. The first impression gained was one was looking at a rotting frond with small patches of grey mould starting to grow. In life, grey hairs on these small salticids stand up on end much as one sees in certain style of modern hair style. However, it is more likely that the spider is actually mimicking a particularly unsavoury caterpillar. Not a great deal is known about the biology of this unusual group. No doubt, more information would be both rewarding to the observer and much appreciated by arachnologists in general. Genus: Neobrettus. So far, only two species of this recently have been recorded. They are small, squat, hairy spiders. For N. tibialis, the cephalothorax is slightly raised, rising steadily from the front eyes to behind the rear eyes before dropping smoothly and steeply to the rear edge. In plan the carapace is more or less oblong, and a little longer than broad. At the rear it curves to a wide posterior edge. It is in colour with the eye surrounds black, large brown patches on the thorax and two vertical brown stripes on each of the sides. On the sides there are quite dense, erect, long white hairs. The abdomen is almost as broad as long, very wide anteriorly, wider towards the rear before curving more rapidly towards the spinnerets. It is grey in colour with some short, transverse, black bands anteriorly and numerous white dots over the rest of the surface. There are long, erect, black and white hairs on the abdomen, particularly the shoulders and on the sides. The legs are moderately long and slender. In general they are yellow in colour with femora I black and a few black marks on the other legs. ventrally on femora I and ventrally on patellae I and tibiae I there are fringes of long grey hairs. Ventrally on the femora of the other legs there are fringes of white hairs. Distribution: Neobrettus is known only from Bhutan, P. Malaysia and Vietnam. Murphy & Murphy 2000: 327. By courtesy of the Authors' and the Malaysian Nature Society.

Copyright © for the page by J. Proszynski, 2000.