Key to Iberian Peninsula Aphaenogaster species

This worker key is based on: [[Media:Gomez, K., Martinez, D., Espadaler, X. 2018. Phylogeny of the ant genus Aphaenogaster in the Iberian Peninsula, with the description of a new species.pdf|Gomez, K., Martinez, D., Espadaler, X. 2018. Phylogeny of the ant genus Aphaenogaster (Hymenoptera: Formicidae) in the Iberian Peninsula, with the description of a new species. Sociobiology 65(2): 215-224 (doi:10.13102/sociobiology.v65i2.2099).]]

This key is modified from an earlier version posted to hormigas.org

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Aphaenogaster

1
Segmentos funiculares 2-6 cortos, apenas más largos que anchos Todos los segmentos funiculares elongados
 * Funicular segments 2-6 short, slightly longer than broad .....2
 * All the funicular segments elongated .....3

2
return to couplet .....1 Cabeza estriada-reticulada
 * Head striated-reticulated .....Aphaenogaster subterranea

Cabeza puntuada, lisa
 * Head punctuated, smooth .....Aphaenogaster dulciniae

3
return to couplet .....1

Cuerpo de color amarillo anaranjado a naranja oscuro Color castaño oscuro a negro
 * Body colour from orange-yellowish to dark orange ..........4
 * Body colour from dark brown to black ..........5

4
return to couplet .....3 Espinas propodeales muy desarrolladas, de longitud similar a la altura del propodeo
 * Propodeal spines very long, its length similar to petiole pedunculum length . . . . . Aphaenogaster cardenai

''Espinas propodeales muy cortas, de longitud mucho menor que la altura del propodeo
 * Propodeal spines very short, almost reduced to triangular teeth.....Aphaenogaster splendida

5
return to couplet .....3

Mandíbulas cortas y poderosas, con el margen exterior fuertemente curvado hacia la linea media. Las obreras mayores convergen a una morfología cefálica similar a Messor
 * Short and powerful mandibles, with the outer margin strongly curved towards the middle line. Major workers converging in cephalic morphology to Messor.....Aphaenogaster striativentris


 * Elongated and triangular mandibles, with the outer margin not strongly curved towards the middle line. Head clearly longer than wide, oval . . . . . 6

Mandíbulas elongado-triangulares con el margen exterior no fuertemente curvado hacia la linea media

6
return to couplet #5


 * Gaster smooth and polished, shiny . . . . . 7


 * Gaster striated, at least in the base, matt . . . . . 8

7
return to couplet #6


 * Brown. Head sculpture reticulated. Mesonotum humped, not forming a continuous line with pronotum in profile view. Mesopleurae longitudinally striated - reticulated . . . . . Aphaenogaster gibbosa


 * Brownish black to black. Head sculpture parallel striated. Mesonotum not humped, forming a continuous line with pronotum in profile view. Mesopleura longitudinally striated . . . . . Aphaenogaster ulibeli

8
return to couplet #6


 * Propodeum with very reduced spines, from non-existent to blunt triangular teeth . . . . . Aphaenogaster gemella


 * Spines clearly developed . . . . . 9

9
return to couplet #8


 * Long propodeal spines, comparable in size to the petiole pedunculum, curved-triangular shaped and following mesosoma dorsal line, usually curved downwards. Antennal club with four segments . . . . . Aphaenogaster iberica

''Espinas propodeales largas, falciformes, siguiendo el perfil corporal y normalmente curvadas hacia la horizontal. Maza antenal de cuatro artejos''

''Espinas más cortas, cilíndrica y orientadas a 45º sobre el propodeo. Maza antenal de cinco artejos''
 * Propodeal spines shorter than the petiole pedunculum, cylindrical and oriented 45º with the horizontal. Antennal club with five segments . . . . . Aphaenogaster senilis