Crematogaster

Blaimer, Bonnie B., 2012, A subgeneric revision of Crematogaster and discussion of regional species-groups (Hymenoptera: Formicidae), Zootaxa 3482, pp. 47-67 : 56

The global Crematogaster clade

( Fig. 2 , clade II)

Comprises former members of subgenera Crematogaster sensu stricto (in part), Decacrema (part), Oxygyne (incl. Nematocrema ), Mesocrema (in part), Colobocrema , Atopogyne and Sphaerocrema .

1. Petiole shape varying from moderately ( Fig. 14 ), broadly ( Fig. 15 ) or sharply flared ( Fig. 16 ), oval ( Fig. 18 ) or suboval ( Fig. 19 ), elongate oval ( Fig. 20 ) or hexagonal ( Fig. 22 ).

2. Postpetiole usually more or less bilobed ( Figs 14 b–19b, 22b), with a distinct longitudinal impression (e.g. Figs 14 b–16b, 23); exception is the African C. kneri -group (see below), here postpetiole globular with at most a weak posterior impression ( Figs 24–25 ).

Figures

FIGURE 2. Bayesian phylogeny of Crematogaster as reconstructed by Blaimer (in press); this analysis was based upon 3384 bp from five nuclear genes. Outgroups have been pruned. Red circles indicate PP = 1.0 and bootstrap> 94; blue squares indicate PP> 0.94 and bootstrap> 74; yellow circles indicate where bootstrap <74 and PP> 0.94, in these cases both values are shown. Clade labels indicate I: subgenus Orthocrema, II + III: subgenus Crematogaster sensu stricto, II: Global Crematogaster clade, III: Australo-Asian Crematogaster clade. Labels i-xi refer to species-groups as outlined in the text.

FIGURES 12 – 19. 12: posterior head margin rounded [Crematogaster (Orthocrema) rasoherinae, CASENT 0193412]; 13: posterior head margin with subangular corners [C. (Orthocrema) volamena, CASENT 0012744]; 14 a: petiole moderately flared, b: postpetiole weakly bilobed (dorsal view) [C. (Crematogaster) pilosa, CASENT 0193165]; 15 a: petiole broadly flared, b: postpetiole weakly bilobed (dorsal view) [C. (Crematogaster) lobata, CASENT 0193045]; 16 a: petiole sharply flared, b: postpetiole distintly bilobed with broad median impression (dorsal view) [C. (Crematogaster) flava, CASENT 0193691]; 17 a: petiole greatly flared, b: postpetiole distintly bilobed (dorsal view) [C. (Crematogaster) dahlii, CASENT 0193602]; 18 a: petiole oval, b: postpetiole weakly bilobed and with faint median impression (dorsal view) [C. (Crematogaster) cf. mjobergi, CASENT 0193799]; 19 a: petiole suboval, b: postpetiole distintly bilobed (dorsal view) [C. (Crematogaster) ranavalonae, CASENT 0193425].

FIGURES 20 – 27. 20: petiole elongate rectangular (dorsal view) [Crematogaster (Crematogaster) irritabilis, CASENT 0193598]; 21: petiole circular (dorsal view) [C. (Crematogaster) subcircularis, CASENT 0193915]; 22 a: petiole hexagonal, b: postpetiole distintly bilobed (dorsal view) [C. _ ss _ AUS 3, CASENT 0193798]; 23: postpetiole with a thin median impression [C. (Crematogaster) irritabilis, CASENT 0193598]; 24: postpetiole lacking median impression (dorsal view) [C. (Crematogaster) treubi, CASENT 0193783]; 25: postpetiole with faint median impression (dorsal view) [C. (Crematogaster) onusta, CASENT 0193714]; 26: propodeal spiracle compressed oval [C. _ ss 11 (= bbb 43), CASENT 0193399]; 27: occipital carinae reduced [C. (Crematogaster) cf. buchneri, CASENT 0193750].