[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 of Salticidae: Orthrus]

Salticidae: Diagnostic Drawings Library

by Jerzy Proszynski 1997

Orthrus Simon, 1900

Diagnoses of genera of South East Asia: Long, green or yellowish salticids. Found on shrubs and plants.
General remarks: In general these spiders are long, green or yellowish and often to be found on large green leaves on the edge of rain forest and in gardens nearby. This suggests that these spiders appreciate an occasional spell of sun bathing. Females, tending their eggs or young, are often to be found on the underside of green leaves under a sheet of silk so thin that an observer can see inside the cell without difficulty.
Genus: Orthrus . This genus contains only three species and is known only from our area. Although not related to Asemonea, they are somewhat similar in general appearan cephalothorax is moderately high, slightly convex on top with the thorax falling awa^ steeply to the posterior margin. In plan the carapace is a broad oval, longer than wide an slightly truncate rear edge. Unlike Asemonea, the male Orthrus has quite long, robust chelicerae which project forwards and sometimes diverge. The eye pattern is 2,2,2,2 and the surroi the eyes of the rear three rows form a continuous black band edged on the inside with a n sinuous, white line. The carapace of one species is orange that grades to pale yellow be the eyes, whilst on another species it is pale yellow with a narrow, brown marginal stripe wide, median, brown thoracic band. The abdomen is a very long, narrow oval and i cylindrical, slightly pointed at the rear. Orthrus species are described as being pale yell colour with one species bearing a broad, dark, median stripe dorsally (see accompa figure). Legs are long and slender, sometimes with modest fringes on the front legs of r The male of an undescribed species from the Philippines has very prominent black fringes dorsally and ventrally, on legs I. The legs are usually pale yellow in colour, sometimes dark marks laterally. After a time, it is not unusual for greenish spiders to become pale y when preserved in alcohol. In our (limited) experience, Orthrus is found under green leave in life is essentially green or pale green. Distribution: Orthrus is known only from Sarawak and the Philippines. Murphy & Murphy 2000: 323. By courtesy of the Authors' and the Malaysian Nature Society.


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