Orthocrema

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

Key to the subgenera Orthocrema and Crematogaster

1 Postpetiole globular, lacking median impression ( Figs 7 , 24 ), or merely impressed posteriorly ( Figs 8 , 21 b, 25)........... 2

– Postpetiole bilobed, with a broad or sharp, more or less distinct median impression ( Figs 9 , 14 b–19b, 22b, 23)............ 4

2(1) Petiole rectangular or ovo-rectangular ( Figs 3 and 4 ); dorsoposterior setae and/or denticles usually present on petiole; propo- deal spiracle circular or subcircular ( Fig. 11 ); global ................................................ .. Orthocrema

– Petiole of different form ( Figs 5 , 14 a–19a, 20, 21a–22a); dorsoposterior setae and denticles present or absent; propodeal spira- cle variable.......................................................................................... 3

3(2) Petiole elongate rectangular ( Fig. 5 ); propodeal spiracle circular or subcircular ( Fig. 11 ); global.............. Orthocrema

– Petiole of variable form ( Figs 14 a–19a, 20, 21a–22a), if elongate rectangular ( Fig. 20 ), then propodeal spiracle compressed oval ( Fig. 26 ); Old World .................................................................... Crematogaster

4(1) Petiole rectangular or ovo-rectangular ( Figs 3 and 4 ); dorsoposterior setae and/or denticles usually present on petiole; Neotro- pical and Malagasy region ...................................................................... Orthocrema

– Petiole of different form ( Figs 14 a–19a, 20, 21a–22a); dorsoposterior setae and denticles present or absent; global ................................................................................................... Crematogaster

Figures

FIGURES 3 – 11. 3: Petiole rectangular (dorsal view) [Crematogaster (Orthocrema) rasoherinae, CASENT 0070841]; 4: petiole ovo-rectangular (dorsal view) [C. (Orthocrema) baduvi, CASENT 0193723]; 5: petiole elongate-rectangular (dorsal view) [C. (Orthocrema) longispina, CASENT 0193767]; 6: petiole with dorsoposterior lateral denticles or tubercules, bearing erect setae (lateral view) [C. (Orthocrema) baduvi, CASENT 0193723]; 7: postpetiole globular and without impression (dorsal view) [C. (Orthocrema) longispina, CASENT 0193767]; 8: postpetiole globular with faint median impression (angled view); 9: postpetiole with median impression and bilobed (dorsal view) [C. (Orthocrema) rasoherinae, CASENT 0070841]; 10: occipital carinae sharp and distinct [C. (Orthocrema) smithi, CASENT 0193697]; 11: propodeal spiracle circular or subcircular [C. (Orthocrema) smithi, CASENT 0193697].

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].

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].