Key to Aphaenogaster gibbosa group workers

This worker key is based on: Salata, S., Borowiec, L. 2018. Redescription of Aphaenogaster muschtaidica Emery, 1908 with a key to gibbosa species group. Asian Myrmecology 10, e010002, pp. 1-15 (DOI 10.20362/am.010002).

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• Aphaenogaster
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1

• Pronotum with transverse striation (Figs 13- 14) . . . . . 2

Fig. 13

Fig. 14

• Pronotum with irregular rugosity, striation or partially smooth (Figs 15-17) . . . . . 3

Fig. 15

Fig. 16

Fig. 17

2

return to couplet #1

• Base of gaster with dense, longitudinal striation (Fig. 18). Spain . . . . . Aphaenogaster striativentris

Fig. 18

• Base of gaster smooth (Fig. 19). Morocco . . . . . Aphaenogaster theryi

Fig. 19

3

return to couplet #1

• Sculpture of pronotum reduced, its lateral surface at least in central part smooth and shiny (Fig. 15). Confirmed records from Iberian Peninsula and France . . . . . 4

Fig. 15

• Surface of pronotum lacking smooth areas (Figs 16-17) Confirmed records from Maghreb, Transcaucasus, Italy and Switzerland . . . . . 5

Fig. 16

Fig. 17

4

return to couplet #3

• Head dorsum with smooth microreticulation, scape with adpressed setae, mesonotum humped, body brown . . . . . Aphaenogaster gibbosa

• Head dorsum smooth and shiny, scape with decumbent setae, mesonotum not humped, body brownish black to black ................ Aphaenogaster sp. Spain (an undescribed species from the Iberian Peninsula. )

5

return to couplet #3

• Propodeal spines small, tooth-like, with rounded tip (Fig. 20), longitudinal striation or reticulation limited to central part of frons (Fig. 23). Morocco . . . . . Aphaenogaster nadigi

Fig. 20

Fig. 23

• Propodeal spines triangular, with sharp tip (Figs 2, 21, 22), longitudinal striation or reticulation exceeding beyond central part of frons (Figs 5, 24, 25). Italy, Switzerland and Transcaucasus . . . . . 6

Fig. 2

Fig. 21

Fig. 22

Fig. 24

Fig. 25

6

return to couplet #5

• Scape with decumbent setae, not longer than half of scape width (Fig. 26), Italy and Switzerland . . . . . Aphaenogaster italica

Figures 26, 27

Fig. 3

• Scape with at least suberect setae, longer than half of scape width (Figs 3, 27) . . . . . 7

7

return to couplet #6

• Scape with longitudinal rugae (Fig. 3), Transcaucasus . . . . . Aphaenogaster muschtaidica

• Scape lacking longitudinal rugae (Fig. 27), Maghreb . . . . . Aphaenogaster mauritanica