Key to Iberian Peninsula Aphaenogaster species

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This worker key is based on: 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

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  • Funicular segments 2-6 short, slightly longer than broad .....2

Segmentos funiculares 2-6 cortos, apenas más largos que anchos

  • All the funicular segments elongated .....3

Todos los segmentos funiculares elongados


return to couplet .....1

Cabeza estriada-reticulada

Aphaenogaster subterranea casent0172716 profile 1.jpg

Cabeza puntuada, lisa

Aphaenogaster dulciniae casent0280959 p 1 high.jpg


return to couplet .....1

  • Body colour from orange-yellowish to dark orange ..........4

Cuerpo de color amarillo anaranjado a naranja oscuro

  • Body colour from dark brown to black ..........5

Color castaño oscuro a negro


return to couplet .....3

Espinas propodeales muy desarrolladas, de longitud similar a la altura del propodeo

Aphaenogaster cardenai casent0249624 p 1 high.jpg

Espinas propodeales muy cortas, de longitud mucho menor que la altura del propodeo

Aphaenogaster splendida casent0280965 p 1 high.jpg


return to couplet .....3

  • Short and powerful mandibles, with the outer margin strongly curved towards the middle line. Major workers converging in cephalic morphology to Messor.....Aphaenogaster striativentris

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

Aphaenogaster striativentris casent0280964 p 1 high.jpg
  • 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


return to couplet #5

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


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
Aphaenogaster gibbosa antweb1008051 p 1 high.jpg
  • 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
Aphaenogaster ulibeli Kg03235-4 p 1 high.jpg


return to couplet #6

  • Propodeum with very reduced spines, from non-existent to blunt triangular teeth . . . . . Aphaenogaster gemella
Aphaenogaster gemella casent0913114 p 1 high.jpg


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

Aphaenogaster iberica casent0280966 p 1 high.jpg
  • Propodeal spines shorter than the petiole pedunculum, cylindrical and oriented 45º with the horizontal. Antennal club with five segments . . . . . Aphaenogaster senilis

Espinas más cortas, cilíndrica y orientadas a 45º sobre el propodeo. Maza antenal de cinco artejos

Aphaenogaster senilis casent0281534 p 1 high.jpg