The Ants of Africa
Genus Cataulacus
Cataulacus pygmaeus André

Cataulacus pygmaeus André

return to key {link to the Hymenoptera Name Server}Type location Sierra Leone (André, 1890: 325, worker), collected at 'Riv.N' Gamie, Chutes de Samlia, A. Mocquerys - see below
junior synonyms
bakusuensis (Cataulacus pygmaeus André v. bausuensis n. v., Forel, 1913h: 350, queen & male) from Zaïre, at Bakusu - see (queen)
chariensis (Cataulacus pygmaeus André var. chariensis nov., Santschi, 1911c: 358, worker) from Chad, collected at Moyen Chari, Fort-Archambault, by Dr J Decorse, 1904 (Bolton, 1974a and 1995) - no images on Antweb (September 2014)
all forms known .

{Cataulacus pygmaeus}André's (1890) description is at {original description} and Santschi's (1911c) description of chariensis is at {original description}. Forel's (1913h) description of bakusuensis is at {original description}. Bolton's modern description (1974a) is at {original description}

WORKER - TL 3.7-4.4 mm; the distinguishing feature of the stout hairs which expand from base to apex was described as rare for the "species" by Bolton (1974a: 48, illustrated full-face view and dorsal alitrunk), when he had the now-revived (by Bolton, 1982: 359) Cataulacus traegaordhi as a junior synonym.

Otherwise, Bolton (1982) lists it from Ghana and Cameroun.

{Cataulacus pygmaeus}Nigeria specimens (Taylor, 1979: 15, as Cataulacus weissi). WORKER. TL 3.3-3.6 mm, HL 0.82-0.96, HW 0.74-0.86, SL 0.40-0.50, PW 0.60-0.70
Occipital corners and remainder of head behind the eyes only denticulate. Dorsum of head and alitrunk with fine loose rugoreticulum. Simple blunt hairs numerous all over. Alitrunk marginate laterally with the margins denticulate. Propodeal spines short and acute. Subpetiolar process complex with the posteroventral angle a long heel or spur. Subpostpetiolar process digitiform.
From low vegetation at the Cocoa Research Institute of Nigeria, Idi Ayunre, Block W22.

Prior to sighting the type images (September 2014) I had thought this specimen was Cataulcaus weissi but it matches almost exactly the type (below).

Cataulacus pygmaeusThe photomontage of the type worker is collated from

Oxford University Museum specimens

Cataulacus pygmaeus
B Taylor det.

Y Braet
Gabon 109

00°34' N
09°19' E
Sesame & forest, sweep net


{Cataulacus pygmaeus}The photomontage is of a worker from Gabon, Pongara National Park; Gabon 109; 1-8.viii.2006; sweep net, sesame & forest; collected by Yves Braet. 

I suspect that this may be a savannah species, while traegaordhi is a forest species but it may be that the taxonomic position still is not satisfactory. Thus, it may well be among the findings from Mt. Nimba, Guinea, which came from both savanna and forest locations, being numerous at the savanna sites (Kéoulenta and Ziéla), and living in stems (twigs?) and under bark (Bernard, 1952). The new Gabon findings of both from essentially the same area suggest a species overlap.

© 2007, 2008, 2009, 2011, 2012, 2014, 2015 - Brian Taylor CBiol FSB FRES
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