Camponotus prostans

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Camponotus prostans
Scientific classification
Kingdom: Animalia
Phylum: Arthropoda
Class: Insecta
Order: Hymenoptera
Family: Formicidae
Subfamily: Formicinae
Tribe: Camponotini
Genus: Camponotus
Species: C. prostans
Binomial name
Camponotus prostans
Forel, 1910

Camponotus prostans casent0280199 p 1 high.jpg

Camponotus prostans casent0280199 d 1 high.jpg

Specimen Labels

Mainly confined to the south-west and southern portions of the SWBP, but has been recorded as far afield as the Gibson Nature Reserve, well to the NE of the SWBP.

Identification

Camponotus prostans and Camponotus dryandrae are very difficult to separate on morphological characters alone. The only reliable feature is the reduced number of setae found on the venter of the head capsule in C. prostans, a feature that requires examination through a microscope. However, in the field their rich reddish- or yellowish-brown-and-black colouration separates most workers of C. dryandrae from the more sober, uniformly blackish or brown-and-black C. prostans.

McArthur and Adams (1996) - Camponotus prostans possesses a few setae on the gula, and is distinguished from Western Australian Camponotus longideclivis and eastern Australian Camponotus consobrinus by the absence of seta on the gula in the latter two species. In dorsal view, the heads of the largest major workers in C. prostans appear circular, as a consequence of HW being greater than HL.

Keys including this Species

Distribution

Distribution based on Regional Taxon Lists

Australasian Region: Australia (type locality).

Distribution based on AntMaps

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Distribution based on AntWeb specimens

Check data from AntWeb

Biology

Castes

Worker

Nomenclature

The following information is derived from Barry Bolton's New General Catalogue, a catalogue of the world's ants.

  • prostans. Camponotus nigriceps subsp. prostans Forel, 1910b: 72 (w.q.) AUSTRALIA. [First available use of Camponotus nigriceps subsp. obnigra var. prostans Forel, 1907h: 301; unavailable name.] Junior synonym of lividipes: Wheeler, W.M. 1933b: 23; Clark, 1934c: 71. Revived from synonymy and raised to species: Taylor, 1987: 14; McArthur & Adams, 1996: 40.

Unless otherwise noted the text for the remainder of this section is reported from the publication that includes the original description.

Description

Worker

Length. 6.8-10.5 mm. Smaller than the subspecies obniger coming from South Australia, quite black or brownish black with pale yellow legs; mandibles, clypeus and flagellum brownish red. Somewhat more glossy than the sub species type and with somewhat longer and richer pubescence especially on the limbs.

McArthur and Adams (1996) - Colour: head black to dark brown; mesosoma colour ranges from black all over to reddish brown all over, some specimens with combinations of above colours; legs lighter, often yellowish; posterior gaster black or dark brown, anterior gaster colour similar to posterior gaster or like most of mesosoma. Pilosity: up to 0.5 mm long plentiful on pronotum and mesonotum with 2-8 on or propodeum (Fig · 31a,b), sparse and shorter on gula sometimes obsolete, plentiful on gaster pointing backwards, short setae on scapes raised to 30°, short setae on midtibiae 20-40°. Pubescence: a coat of suberect setae about 0.1 mm long, spaced < length, usually whitish, visible with transmitted light on the dorsum of mesosoma; adpressed and sparse on head. Integument finely reticulate, glossy. Node summit viewed from rear: conkvex or flat in major workers, convex in other workers. Metanotum usually distinct in major workers.

HW = 1.80-3.5 mm; HL = 2.30-3.45 mm; TL = 2·60-3.00 mm; n = 20. TL = 1.89 + 2.22 log HW (n = 11, r = 0.95, s.e.(y) = 0.17, s.e.(x) = 0.04). PD:D = 2.0 in major workers increasing to 3.0 in minor workers. HW:HL = often reaches 1.05 in major workers where HW > 3.4 mm.

Queen

Length. 15-17 mm. Same color as the worker. Pubescence more ample than the type. Wings weak somewhat stockier in proportion than the type.The clypeus has the exact form of the type. The worker from Lion Mill has above all more upstanding hair and also much stronger spines on the legs.

Type Material

  • Camponotus nigriceps prostans Forel, 1910: Syntype, worker(s), Mount Helena (as Lion Mill), Jarrahdale, Lunenberg, Pickering Brook, Torbay and north of Albany, WA, Australia, Musee d'Histoire Naturelle Genève.
  • Camponotus nigriceps prostans Forel, 1910: Syntype, 1 worker, Mount Helena (as Lion Mill), Western Australia, Australia, Western Australian Museum.

Etymology

McArthur and Adams (1996) - Presumed from porost (Latin: outstanding) as the colour of the subspecies type is much darker than that of the type, C. nigriceps.

References