antenna
scapes surpass posterior head margin
scapes surpass posterior head margin
Antennal scapes, when arranged along the anteroposterior axis of the head, reach or exceed its posterior margin.
scapes barely or do not surpass eyes
scapes barely or do not surpass eyes
Antennal scapes, when arranged along the anteroposterior axis of the head, barely surpass or do not surpass posterior margin of eye. In Antkey, separate all the species of Cerapachyinae from those of Myrmicinae.
scapes do not surpass margin
scapes do not surpass margin
Antennal scapes do not exceed posterior head margin by a distance greater than half eye length. Separates Plagiolepis exigua from Plagiolepis alluaudi and Plagiolepis pygmae.
< 10 erect scape hairs
< 10 erect scape hairs
Antennal scapes with less than 10 erect hairs. The hairs may be also be semierect, but are distinguished from the more common appressed pilosity. Separates Nylanderia guatemalensis and Nylanderia vaga from Nylanderia flavipes, Nylanderia terricola and Nylanderia vividula.
> 10 erect scape hairs
> 10 erect scape hairs
Antennal scapes with more than 10 erect hairs. The hairs may be also be semierect, but are distinguished from the more common appressed pilosity. Separates Nylanderia flavipes, Nylanderia terricola and Nylanderia vividula from Nylanderia guatemalensis and Nylanderia vaga.
antennal segments
antennal segments
The total number of antennal segments including the scape and the funiculus. The worker caste of the species treated in the key have between 6-12 segments.
scapes 1.5x head length
scapes 1.5x head length
The antennal scapes are extremely long, their length measuring more than 1.5x the length of the head. Used in Antkey to separate Anoplolepis gracilipes and Paratrechina longicornis from other formicine genera.
scapes < 1.5x head length
scapes < 1.5x head length
The antennal scapes of various lengths, from short to long, but never measuring more than 1.5x the length of the head. Used in Antkey to separate other formicine genera from Anoplolepis gracilipes and Paratrechina longicornis.
scapes barely surpass margin
scapes barely surpass margin
The antennal scapes are relatively short, reaching the posterior head margin but not surpassing it by more than 1/5th their length. Used in Antkey to separate Brachymyrmex JAM-001 from all other Brachymyrmex species.
scapes clearly surpass margin
scapes clearly surpass margin
The antennal scapes are relatively long, surpassing the posterior head margin by more than 1/5th their length. Used in Antkey to separate all other Brachymyrmex species from Brachymyrmex JAM-001.