petiole
petiolar node with convex dorsum
petiolar node with convex dorsum
The petiolar node has a convex dorsal face and the dorsal profile slopes anteriorly. In Antkey used to separate Crematogaster obscurata from Crematogaster scutellaris.
petiolar node with flat to concave dorsum
petiolar node with flat to concave dorsum
The petiolar node has a flat to concave dorsal face. In Antkey used to separate Crematogaster scutellaris from Crematogaster obscurata.
petiole node excised medially
petiole node excised medially
The petiolar node is excised medially to form a pair of dorsolateral spines.
waist strongly punctate
waist strongly punctate
The petiole and postpetiole are covered on all surfaces by a punctate ground sculpture, giving them dull appearances. Used in Antkey to separate the minor worker of Pheidole obsurithorax from that of Pheidole fervens.
waist weakly sculptured
waist weakly sculptured
The lateral portions of petiole and postpetiole are weakly sculptured to lacking sculpture, giving them a shiny appearance. Used in Antkey to separate the minor worker of Pheidole fervens from that of Pheidole obscurithorax.
petiole flattened
petiole flattened
The petiole appears flattened and lacks a distinction between the peduncle and the node. Used in Antkey to separate Crematogaster from many other myrmicine genera.
petiolar node subquadrate
petiolar node subquadrate
The petiolar node relatively quadrate and subpetiolar process broad in profile with a blunt anterior angle and an acute posterior angle. Used in Antkey to separate Gnamptogenys triangularis from Gnamptogenys porcata.
petiole lacking posterior face
petiole lacking posterior face
The petiole is broadly attached to gaster and lacks a posterior face. Used in Antkey to separate Amblyoponinae from all other subfamilies.
petiole obscured by gaster
petiole obscured by gaster
The petiole, or most of the petiole, may occasionally be obscured by the gaster. This condition is often the case for species of Brachymyrmex, Nylanderia, Tapinoma and Technomyrmex (all of which have a single waist segment). Used in Antkey to separate the aforementioned genera from all others.
petiole lacking apical spine
petiole lacking apical spine
The petiole may be tapered apically, but does not form a distinct thin and sharp spine on its dorsal surface. Used in Antkey to distinguish various Ponerine genera from Odontomachus.