Euponera (Trachymesopus) pachynoda

Clark, J., 1930, New Formicidae, with notes on some little-known species., Proceedings of the Royal Society of Victoria 43, pp. 2-25 : 7-8

Euponera (Trachymesopus) pachynoda , n. sp. (Text-fig. 1, No. 5.)

Worker.-Length, 5 mm.

Castaneous. Densely and finely reticulate-punctate, more coarsely so on the gaster. Mandibles coarsely punctate.

Hair yellow, erect, long and abundant throughout, particularly on the apical segments of the gaster. Pubescence yellow, long and adpressed on the head, thorax and node, much longer and more abundant on the gaster, but not hiding the sculpture, shorter on the antennae and legs.

Head longer than broad, as broad in front as behind, the occipital border concave, the sides convex. Frontal carinae short, twice as long as broad, flattened, overhanging the antennal insertions, separated by a very fine groove. Clypeus short, convex, broadly rounded in front. Eyes very minute, placed in front of the anterior third of the sides. Scapes extending beyond the occipital border by barely their thickness; first segment of the funiculus almost twice as long as the second, the others subequal to the apical, which is as long as the two preceding segments together. Thorax twice as long as broad. Pronotum broader than long, convex in front and on the sides. Mesonotum broader than long, strongly convex in front, feebly so behind. Epinotum longer than broad, convex in front, the sides parallel, the posterior border concave; in profile the dorsum straight longitudinally, the declivity convex, the sides feebly bordered. Node massive, one-third broader than long, strongly convex in front and on the sides, the posterior border straight; in profile almost one-third higher than long, parallel, the anterior and posterior faces straight, the dorsum feebly convex. There is a long tooth on the middle of the ventral surface, directed backward. Postpetiole broader than long, the anterior border and sides feebly convex, almost straight. There is a deep constriction between the postpetiole and first segment of the gaster, the latter broader than long.

Habitat.-Victoria: Ferntree Gully (F. P. Spry; L. B. Thorn).

It is with some doubts that this species is placed in the present genus. The epinotum and node are similar to those of the genus Acanthoponera , whilst the remainder are quite those of the present genus.