Cerapachys sexspinus species group

Based on [[Media:Borowiec 2009.pdf|Borowiec, M.L. 2009. New species related to Cerapachys sexspinus and discussion of the status of Yunodorylus. Zootaxa. 2069:43-58. PDF]]

This species group is distinctive enough to warrant raising the genus Yunodorylus to its status as a valid genus (Borowiec 2016).


 * Yunodorylus doryloides
 * Yunodorylus eguchii
 * Yunodorylus paradoxus
 * Yunodorylus sexspinus

Key to Yunodorylus

Worker Diagnosis
Antennae with 11 or 12 segments.

Apical antennal segment not conspicuously enlarged, equal or little longer than two preceding.

Parafrontal ridges strongly reduced to absent (see note 1 below).

Two ridges present behind frontal carinae with medial impression between them.

Palp formula 2,2 (known in Yunodorylus sexspinus, Yunodorylus paradoxus).

Mandibles triangular, crenulate or with denticles, or elongated, with teeth.

Eyes in worker completely absent.

Ventrolateral margins of the head capsule reduced to weakly pronounced ridge.

Ocelli in workers absent.

Pronotum not marginate anterodorsally, pronotal collar not separated from dorsal surface.

Mesosoma, petiole and postpetiole not marginate dorsolaterally.

Waist of a single segment, abdominal segment IV with very broad presclerites and weak constriction between pre- and postsclerites (see note 2 below).

Fourth abdominal tergite not folding over sternite, and anterior portions of sternite and tergite are equally well visible in side view.

Spur formula 2(1s,1p),2(1s,1p) (see note 3 below).

Middle and hind basitarsi not widening distally, circular in cross-section.

Posterior flange of hind coxa not produced as raised lamella.

Metatibial glands with no discernible orifice, visible as a lighter, round to elongate patch of cuticle devoid of pubescence.

Pretarsal claws simple.

Polymorphic (see note 4 below).

Characters in italics are hypothetical autapomorphies of the group. They could not be seen in any other Cerapachys or other species of the Cerapachyinae available at the time of this study and are apparently unique for the whole subfamily.