Jumping spider

Fact Box Species: Opisthoncus alborufescens (QM) (See notes below) Family: Salticidae Body length: female: about 9 mm male: about 7 mm Habitat: Usually on green leaves of shrubs Toxicity: Bites may cause local pain

This is one of the many salticid species that can be found anywhere on trees or in green vegetation because of their great mobility. Opisthoncus species are generally quite easy to recognize to genus because of a small 'lump' between the last pair of eyes. However, there are many known Australian Opisthoncus species and for most of them one of the two sexes has not been adequately (if at all) described but is likely to have a very different appearance when compared with the other sex. In addition, several of the more common species are sufficiently similar in appearance and surface markings that they can only be distinguished from each other by a careful examination of their genitalia. The most recent and comprehensive review of the Australian Opisthoncus species can be found in the following paper: Gardzinska J and Zabka M (2013) "Redescription of the genus Opisthoncus L. Koch, 1880 (Araneae: Salticidae)" Zootaxa 3717, 401-447. This paper contains many images of Opisthoncus species but unfortunately these are all of preserved specimens which therefore have changed colour patterns. However, the spider presented above does seem to convincingly match the Gardzinska/Zabka images of O. alborufescens.

Known range: Longreach and down to South-esat Queensland, plus examples from Sydney and Eden NSW as well.

Spider(s) with a very similar appearance: Opisthoncus parcedentatus and several other Opisthoncus species.

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