Taxonomic History (provided by Barry Bolton, 2019)
Crematogaster grevei Forel, 1891c PDF
: 183, pl. 6, fig. 8 (w.) MADAGASCAR. Malagasy. Primary type information: Madagascar, Morondava, coll. Grevé; CASENT0101572; MHNG. AntCat AntWiki HOL
Distribution: Geographic regions
(According to curated Geolocale/Taxon lists): Africa: Madagascar Biogeographic regions
(According to curated Bioregion/Taxon lists): Malagasy
is widespread throughout the seasonally dry forests and spiny forests of western and southwestern Madagascar.
This species is frequently collected nesting in dead twigs on and above the ground, in rotten logs, from leaf litter samples, and also found occasionally nesting under stones or in stems of live plants.There are two colour variants of C.grevei
that have nearly allopatric distributions.The first variant is distinctly bi-coloured, with a pale to bright orange-red head, mesosoma, legs, petiole and postpetiole that contrast with a brown to almost black gaster; the second variant is uni-coloured, from reddish brown to brown to dark brown, to entirely black. Their distribution pattern suggests that the orange variant is associated with the spiny forests of the far south and southwest parts of Madagascar, while the brown or black variant is adapted to western dry and western subhumid forest habitats.
- antennae 10-segmented
- lateral portions of the promesonotum raised with respect to the median portion, ending in postero-lateral denticles
- lateral carinae border the metanotal groove
- petiole with postero-lateral tubercles dorsally that each bear a single, stiff and long erect seta
- postpetiole distinctly bilobed and broadly medially impressed, also bearing a pair of dorso-posterior stiff, long erect setae
- spines short and straight
- erect pilosity present on abdominal tergites 4-7
Blaimer, B. B. (2010) Taxonomy and Natural History of the Crematogaster
) group in Madagascar. Zootaxa
, 2714, 1-39.
Specimen Habitat Summary
Found most commonly in these habitats: 37 times found in tropical dry forest, 22 times found in gallery forest, 16 times found in spiny forest/thicket, 7 times found in Gallery forest on sandy soil, 5 times found in Dry forest on sandy soil, 3 times found in tropical dry forest on tsingy, 1 times found in Uapaca woodland, 1 times found in Gallery forest with bamboo, 2 times found in gallery forest, degraded, 2 times found in deciduous dry forest, ...
Found most commonly in these microhabitats: 24 times sifted litter (leaf mold, rotten wood), 16 times ex rotten log, 12 times on low vegetation, 7 times ex dead twig above ground, 4 times ex dead branch above ground, 5 times ex rotten stick on ground, 2 times under tree bark, live tree, 4 times leaf litter, 1 times ex rotting tree stump, 1 times under tree bark, on rotten log on ground, 2 times under stone, ...
Collected most commonly using these methods: 12 times Malaise trap, 13 times MW 50 sample transect, 5m, 2 times 10 MaxiWinks, mixed samples, 6 times MW 20 sample transect, 5m, 2 times pitfall trap, PF 50 traps, 11 cm dbh with water, soap, formalin, nonlinear placement, 2 times MW 25 sample transect, 5m, 1 times one Malaise trap, 1 times pitfall trap, PF 50 tube sample transect, 5m, 1 times sweeping, 1 times beating low vegetation, 1 times yellow pan trap, YP 25 trap transect, ...
Elevations: collected from 6 - 990 meters, 229 meters average
Type specimens: Lectotype of Crematogaster grevei: casent0101572
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