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Species: Tetramorium ranarum   Forel, 1895 

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Taxonomic History (provided by Barry Bolton, 2020)

Tetramorium (Xiphomyrmex) ranarum Forel, 1895i PDF: 486 (w.) MADAGASCAR. Malagasy. AntCat AntWiki HOL

Taxonomic history

Combination in Xiphomyrmex: Wheeler, 1922: 1032; in Tetramorium: Bolton, 1979 PDF: 151.
// Distribution


  Geographic regions (According to curated Geolocale/Taxon lists):
    Africa: Madagascar
  Biogeographic regions (According to curated Bioregion/Taxon lists):

Taxonomic Treatment (provided by Plazi)

Treatment Citation: Bolton, B., 1979, The ant tribe Tetramoriini (Hymenoptera: Formicidae). The genus Tetramorium Mayr in the Malagasy region and in the New World., Bulletin of the British Museum (Natural History) Entomology 38, pp. 129-181

Tetramorium ranarum ForelHNS

(Fig. 25)

Tetramorium (Xiphomyrmex) ranarum ForelHNS, 1895 b: 486. Syntype workers, Madagascar: central Madagascar {Sikora) (MHN, Geneva) [examined].

Worker. TL 3.0 - 3.3, HL 0.72 - 0.82, HW 0.68 - 0.76, CI 94 - 97, SL 0.48 - 0.54, SI 67 - 71, PW 0.48 - 0.55 ' AL 0.80 - 0.88 (8 measured).

Mandibles strongly longitudinally striate, anterior clypeal margin with a median notch or impression. Eyes relatively small, maximum diameter c. 0.13 - 0.14, about 0.17 - 0.19 x HW. Frontal carinae strong and surmounted by a raised narrow rim or crest, occipitally becoming weaker and merging into the other cephalic sculpture. Antennal scrobes shallow but broad, the scrobal area with some rugulose sculpture. Propodeal spines elongate and strong, tending to be upcurved along their length. Metapleural lobes broadly triangular and acute. Petiole node in profile blocky, about as long dorsally as the tergal portion is high. In dorsal view the petiole node about as broad as long, in some specimens slightly broader than long and vice versa in others. Postpetiole evenly convex in profile, much broader than petiole in dorsal view. Head predominantly bluntly longitudinally rugulose with some cross-meshes and with a reticulum occipitally, the dorsal surfaces of the blunt rugulae with a beaded appearance due to the presence of aligned punctulae. Spaces between rugulae weakly punctulate. Dorsal alitrunk reticulate-rugulose, the rugulae more strongly developed than on the head but still blunt and with the same beaded appearance. Petiole dorsum with traces of rugular sculpture, the postpetiole and gaster unsculptured. All dorsal surfaces of head and body with numerous fine hairs. Colour medium to dark reddish brown.

T. quasirumHNS and coillumHNS are the species most closely related to ranarumHNS, the three of them sharing a similar habitus but differing in detail. Thus, quasirumHNS is a noticeably smaller species than ranarumHNS with relatively larger eyes, and coillumHNS has the petiole more sharply angulate and retains rugulose sculpture on the postpetiole.

Material examined

Madagascar: Perinet (W. L. Brown); Andasibe (= Perinet) (W. L. & D. E. Brown).

Specimen Habitat Summary

Found most commonly in these habitats: 55 times found in montane rainforest, 42 times found in rainforest, 2 times found in montane rainforest, marsh edge, 2 times found in rainforest, transition to montane forest, 1 times found in montane forest, 1 times found in gallery montane forest, 1 times found in in guava forest, 2 times found in stomach contents of Mantella baroni, 1 times found in disturbed montane rainforest, 2 times found in Savannah grassland, ...

Found most commonly in these microhabitats: 40 times sifted litter (leaf mold, rotten wood), 21 times ex rotten log, 14 times sifted litter, 4 times under root mat on rock, 1 times ground forager(s), 2 times ex soil, 1 times ex dead tree stump, 2 times under rootmat, on rock, 1 times rot.wd, 1 times pitfall trap, 1 times on low vegetation, ...

Collected most commonly using these methods: 15 times MW 50 sample transect, 5m, 2 times 7 MaxiWinks, 5 times Malaise trap, 4 times 9 MaxiWinks, mixed samples, 7 times 03 MaxiWinks, mixed samples, 2 times MW, 25 sifted litter, 10 times MW 25 sample transect, 5m, 5 times pitfall trap, PF 50 tube sample transect, 5m, 1 times 9 Maxi winklers, 4 times pitfall trap, PF 50 traps, 11 cm dbh with water, soap, formalin, nonlinear placement, 2 times pitfall traps, ...

Elevations: collected from 140 - 1700 meters, 1043 meters average

Collect Date Range: collected between 1969-03-17 and 2015-03-25

Type specimens:

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