Camponotus lividipes

Identification
McArthur and Adams (1996) - The clypeus of C. nigriceps lividipes resembles Camponotus terebrans, where the anterior margin is more straight and dissimilar to the concave anterior margin of the C. nigriceps group.

Distribution based on Regional Taxon Lists
Australasian Region: Australia.

Nomenclature

 * . Camponotus nigriceps st. lividipes Emery, 1887a: 211 (footnote) (s.w.) AUSTRALIA (South Australia, Queensland).
 * Combination in C. (Myrmoturba): Forel, 1914a: 267;
 * combination in C. (Tanaemyrmex): Emery, 1925b: 103.
 * Subspecies of consobrinus: Wheeler, W.M. 1933b: 23; Clark, 1934c: 71.
 * Subspecies of nigriceps: Emery, in Dalla Torre, 1893: 244 (footnote); Emery, 1896d: 372 (in list); Emery, 1925b: 103; Taylor & Brown, 1985: 117; Taylor, 1987a: 14; Bolton, 1995b: 108.
 * Status as species: Dalla Torre, 1893: 240; Forel, 1914a: 267; McArthur, 2014: 66.
 * pseudolus. Camponotus pseudolus Forel, 1907a: 31.
 * Status as species: Emery, 1925b: 125.
 * Unnecessary replacement name for mendax Forel, 1895e: 454; hence junior synonym of mendax: Bolton, 1995b: 118.
 * puberula. Camponotus irritans subsp. puberula Emery, 1920c: 7.
 * [First available use of Camponotus maculatus subsp. subnudus var. puberula Emery, 1900d: 703 (s.w.) INDONESIA (Sumatra); unavailable (infrasubspecific) name.]
 * [Junior primary homonym of Camponotus carbo subsp. puberulus Emery, 1897e: 604 (Bolton, 1995b: 118).]
 * Karavaiev, 1929c: 236 (q.m.).
 * Combination in C. (Tanaemyrmex): Emery, 1925b: 94.
 * Subspecies of irritans: Emery, 1925b: 94; Karavaiev, 1929c: 236; Chapman & Capco, 1951: 247; Bolton, 1995b: 118.
 * Replacement name: Camponotus irritans sumatranus Özdikmen, 2010a: 528. 

Description
In my collection a specimen from the Andaman Islands has all the characteristic shape, markings and hair of C nigriceps, and the color of the smaller forms of the type. Length 12 mm.,the development of the head corresponding with the Australian forms of 10 mm. I believe that I have to refer to the aberrant race of C nigriceps the following forms that I will now call C lividipes n.st. The shape of the clypeus and markings is similar to C.nigriceps. The node is depressed from the back where the appearance is almost plateau; the soft hair of the limbs is longer and more abundant. The color is black, with only the limbs and flagelli testaceous, so therefore at first sight it resembles C.testaceipes Smith. Specimens from my Adelaide and Queensland collections are a lot smaller (6-10 mm)

Forel (1902): Under the name nigriceps, subspecies lividipes, Emery has briefly described a still smaller form from Adelaide and Queensland. He maintains that the clypeus is like the type. He only gave me a female lividipes from Tasmania but with this species the clypeus is throughout not like the type. Its central lobe is trapeze shaped without the lateral concave sides (the sides are rather rounded) and in the middle is edged as with claripes. The sides of the central lobe are convex and not concave as is the case with nigriceps.

On the whole,the specimens from Adelaide and Queensland are identical with specimens from Tasmania, so the lividipes must be considered as a single (unique??) species. The scape is much longer than the almost familiar claripes and protrudes to exactly the posterior border of the head.

Type Material
McArthur and Adams (1996) – Drawer 113, 1 major worker from Australia. 1 medium worker, damaged. Major worker: HW = 2.45 mm, HL = 2.5 mm, PW = 1.5 mm, HT = 2.5mm, TL = 2.0 mm. From Adelaide, D’Albertis collection, 1873, New South Wales.