petiole
1-segmented waist
1-segmented waist
The mesosoma and gaster connected by a single waist segment referred to as the petiole (abdominal segment 2). Used in Antkey to separate Amblyoponinae, Dolichoderinae, Ectatomminae, Formicinae and Ponerinae from Cerapachys, Myrmicinae and Pseudomyrmecinae.
petiolar node reduced or absent
petiolar node reduced or absent
The petiolar node greatly reduced or absent, the anterior face absent or at most indistinct. Used in Antkey to separate Brachymyrmex, Tapinoma and Technomyrmex from various other genera in Dolichoderinae and Formicinae.
petiolar node present
petiolar node present
The petiolar node present and with distinct anterior and posterior faces. Used in Antkey to separate various genera in Dolichoderinae and Formicinae from Brachymyrmex, Tapinoma and Technomyrmex.
propodeum and petiole armed
propodeum and petiole armed
The propodeum and petiolar node both armed with a pair of short teeth. Used in Antkey to separate Dolichoderus thoracicus from other species of Dolichoderinae and Formicinae.
propodeum and petiole unarmed
propodeum and petiole unarmed
The propodeum and petiolar node both lacking a pair of short teeth. Used in Antkey to separate various species of Dolichoderinae and Formicinae from Dolichoderus thoracicus.
subpetiolar process well developed
subpetiolar process well developed
The subpetiolar process is well developed as a flange or lobe. The process is located at the far anterior end of the petiole and maybe be difficult to see on most specimens. Used in Antkey to separate Solenopsis xyloni from Solenopsis geminata.
subpetiolar process lacks fenestra
subpetiolar process lacks fenestra
The subpetiolar process lacks a fenestra, and also lacks a posteriorly projecting angle or tooth. Used in Antkey to separate Hypoponera from Ponera.
subpetiolar process weak or absent
subpetiolar process weak or absent
The subpetiolar process is weak to absent, never as a well developed flange or lobe. If a process is present, it is located at the far anterior end of the petiole and maybe be difficult to see on most specimens. Used in Antkey to separate Solenopsis geminata from Solenopsis xyloni.
subpetiolar process with fenestra
subpetiolar process with fenestra
The subpetiolar process has a fenestra at the anterior end, and often also has a posteriorly projecting angle or tooth. Used in Antkey to separate Ponera from Hypoponera.
subpetiolar process lacks fenestra
subpetiolar process lacks fenestra
The subpetiolar process narrow and with a fenestra absent Used in Antkey to separate Amblyopone zwaluwenburgi from Prionopelta antillana.