The Ants of Africa
Genus Paratrechina
Paratrechina incallida (Santschi)

Paratrechina incallida (Santschi)

return to key{link to the Hymenoptera Name Server} Type location São Thomé I. (Prenolepis (Nylanderia) incallida n. sp., Santschi, 1915c: 263, illustrated, worker; in Paratrechina (Nylanderia) Emery, 1925b: 218) - see below
junior synonym arlesi (Paratrechina (Nylanderia) arlesi n. sp., Bernard, 1952: 257, illustrated, worker), type location Guinea; from Mt. Nimba, 10 workers from Ravine I of Mount Tô (stations B1,28 and B2.41), 2 workers from Ravine 3 (Lamotte, in Bernard, 1952); cotypes numerous workers from the same places; worker only described - see below
worker only .

{Paratrechina incallida}Santschi's (1915c) description is at {original description}. Bernard's (1952) description is at {original description}.

Santschi's (1915c) description is -
WORKER - TL 2.2 mm; head oval. Eyes quite large, set a little forward of midline. Clypeus convex (less so than lepida), subcarinate, anterior border weakly but quite broadly scalloped medially. Mandibles smooth with sparse puncturations; 6 teeth, the third very small (albipes has four teeth). Scape surpassing occiput by more than half its length. Thorax somewhat elongated; pronotum wider than long, very rounded dorso-laterally; mesonotum as long as anterior width, feebly raised posteriorly; metanotum a little wider than long, with the spiracles quite close and raised dorsally. Propodeum convex and very elevated; dorsum shorter than the declivity. Petiole scale very obliquely angled forward, summit feebly convex and wider than the base.
Colour clear red brown; gaster darker; funiculus, tibia and hind femora clear yellow. Smooth with front of head feebly reticulate. Shiny. Moderately abundant, brown, quite sharp, erect hairs; four pairs of macrochaets on alitrunk; metanotum and propodeum without hairs. Pubescence scarce except on antennae.
Holotype worker only from San Thomé.

Note: LaPolla, Hawkes & Fisher (2011: 12) place arlesi as a junior synonym of incallida.

Paratrechina incallidaThe photomontage of the type worker is collated from

Paratrechina incallida arlesiThe photomontage of the arlesi type worker is collated from

{Paratrechina arlesi}Bernard's (1952) description translated is:

WORKER - TL 2.8-3.1 mm; forebody brown, varying in darkness, gaster blackish, appendages clear brown. All shiny, without puncturation except on the propodeum which is finely puncturated on the dorsum and sides. Strong pilosity, made up of large brown erect hairs, over all the body; pubescence yellowish, fine and sparse.

Placed in subgenus Nylanderia Emery, by Bernard, who regarded it as in a group with other members known from Cameroun to Gabon. The others were P. grisoni Forel (type location Zaïre, with subspecies fuscula Menozzi, from Fernando Po), P. incallida Santschi (type location San Thomé I.), and lepida Santschi; but all three were smaller (TL 2.0-2.4 mm) and had an elongated propodeum, with a smooth propodeum. With arlesi the propodeum was broader than long, very enlarged towards the posterior, with two clear ridges toward the centre. In profile arlesi was steeply declined, being level or only slightly declined in the others. Other than the clear distinctions of the posterior shape of the thorax, arlesi had similar characters to incallida. Bernard dedicated the species to M. C. Arlès, artist from his laboratory who mounted and photographed many of the ants from Nimba.

Oxford University Museum specimens

Paratrechina incallida
B Taylor det.
A Fotso Kuate
Paratrechina sp1
03°54'30" N
11°25'58" E
Tuna bait in fallow
Paratrechina incallida
B Taylor det.

Y Braet
Gabon 56
00°34' N
09°19' E
Pointe Wingombe; forest edge and mini-savannah edging lagoon; malaise trap

{Paratrechina incallid}The photomontage is of a specimen from Gabon; Pongara National Park; collector Yves Braet (Gabon 56). Listed in Braet & Taylor (2008).

{Paratrechina incallida}The photomontage is of a damaged worker from Cameroun; Matomb; collector A Fotso Kuate (fk paratrechina sp1),

Paratrechina incallidaThe photomontage is collated from Locality: Ivory Coast: Foret De Tai; no 84;
Collection codes: TD84;Collected by: T. Diomande; Date: 7 Jul 1975

Specimen used by LaPolla, Hawkes & Fisher (2012) to illustrate the species.

Note: the description of arlesi given by Bernard (see below) has the colour as more or less dark brown, gaster blackish, appendages light brown, pilosity of large brown hairs; TL 2.8-3.1; LaPolla, Hawkes & Fisher (2011) state Bernard's type specimens "match the [incallida] type specimens very well" but the two descriptions do not gel. The Santschi description and the CASENT specimen, together with those I show above, and the LaPolla et al modern version do match.

© 2007, 2010, 2011, 2013, 2014 - Brian Taylor CBiol FSB FRES
11, Grazingfield, Wilford, Nottingham, NG11 7FN, U.K.