Crematogaster

Blaimer, Bonnie B., 2012, A subgeneric revision of Crematogaster and discussion of regional species-groups (Hymenoptera: Formicidae), Zootaxa 3482, pp. 47-67 : 54

publication ID	https://doi.org/ 10.5281/zenodo.209409
publication LSID	lsid:zoobank.org:pub:42F5ABE3-37EC-48D6-AB1A-357BCC93DF68
DOI	https://doi.org/10.5281/zenodo.6166973
persistent identifier	https://treatment.plazi.org/id/D50987AA-0103-DC32-F991-A461FD782D52
treatment provided by	Plazi
scientific name	Crematogaster
status	sensu stricto

Treatment

Crematogaster View in CoL sensu stricto

( Fig. 2 View FIGURE 2 , clade II + III)

Distribution: GLOBAL (same as genus). Former members of subgenera Crematogaster sensu stricto, Decacrema, Oxygyne (incl. Nematocrema ), Mesocrema (in part), Atopogyne , Sphaerocrema , Colobocrema , Paracrema , Physocrema , Xiphocrema , and a few previously misassigned Orthocrema species ( C. irritabilis and C. polita ).

1. Petiole shape (in dorsal view) highly variable: moderately flared ( Fig. 14 View FIGURES 12 – 19. 12 a), broadly flared ( Fig. 15 View FIGURES 12 – 19. 12 a), sharply flared ( Fig.16 View FIGURES 12 – 19. 12 a), greatly flared ( Fig. 17 View FIGURES 12 – 19. 12 a), oval ( Fig. 18 View FIGURES 12 – 19. 12 a) or suboval ( Fig. 19 View FIGURES 12 – 19. 12 a), elongate rectangular ( Fig. 20 View FIGURES 20 – 27. 20 ), circular ( Fig. 21 View FIGURES 20 – 27. 20 a), or hexagonal ( Fig. 22 View FIGURES 20 – 27. 20 a), but not rectangular or ovo-rectangular (as in Fig. 3 View FIGURES 3 – 11. 3 or 4). If petiole elongate-rectangular ( Fig. 20 View FIGURES 20 – 27. 20 ) and thus similar to some Orthocrema species (as in Fig. 5 View FIGURES 3 – 11. 3 ), then propodeal spiracle compressed oval.

2. Petiole with dorsoposterior denticles/tubercules and dorsoposterior erect setae (e.g. Figs 14 View FIGURES 12 – 19. 12 a, 16a) or lacking denticles/tubercules (e.g. Figs 15 View FIGURES 12 – 19. 12 a, 18a–19a, 20, 22a), while setae may still be present.

3. Postpetiole varying from distinctly ( Figs 16 View FIGURES 12 – 19. 12 b-17b, 19b, 22b) to weakly bilobed ( Figs 14 View FIGURES 12 – 19. 12 b–15b, 18b), with a broad ( Fig. 16 View FIGURES 12 – 19. 12 b) to thin median longitudinal impression ( Fig. 23 View FIGURES 20 – 27. 20 ). More rarely postpetiole only with faint posterior impression ( Figs 18 View FIGURES 12 – 19. 12 b, 25) or lacking impression entirely ( Fig. 24 View FIGURES 20 – 27. 20 ). Probably ~80% of the species diversity in this clade has a clearly bilobed postpetiole with a distinct median longitudinal impression.

4. Propodeal spiracle often oval or compressed oval ( Fig. 26 View FIGURES 20 – 27. 20 ).

5. Occipital carinae variable, but often reduced ( Fig. 27 View FIGURES 20 – 27. 20 ).

6. Antennae usually 11-segmented, rarely 10-segmented or (one species) 9-segmented. Antennal scapes of variable length; if antennae distinctly clubbed, then usually club 3-segmented.

7. Head shape highly variable, but often with a straight ( Fig. 28 View FIGURES 28 – 35. 28 ) or medially depressed posterior head margin ( Fig. 29 View FIGURES 28 – 35. 28 ) and with suboval or subangular corners.