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Species: Tetramorium sikorae   Forel, 1892 

Classification:
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Taxonomic History (provided by Barry Bolton, 2020)

Tetramorium sikorae Forel, 1892l PDF: 522 (w.) MADAGASCAR. Malagasy. Primary type information: MADAGASCAR, Toamasina, Amparafaravantsiv, Mangoro Ufer 984, 20°S, 47.08333 E, coll. Sikora; CASENT0101260; MHNG. AntCat AntWiki HOL

Taxonomic history

Combination in Xiphomyrmex: Emery, 1895g PDF: 343; in Tetramorium: Bolton, 1979 PDF: 138.
Senior synonym of Tetramorium latior: Bolton, 1979 PDF: 138.
See also Hita Garcia & Fisher, 2014 PDF: 146 (Lectotype designation).

Distribution:

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

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 sikorae ForelHNS

Tetramorium (Xiphomyrmex) sikorae ForelHNS, 1892: 522. Syntype workers, Madagascar: Amparafaravantsiv (Sikora) (MHN, Geneva) [examined]. Xiphomyrmex latior SantschiHNS, 1926: 243. Syntype workers, Madagascar: Fananantsoa [= Fianorantsoa on data label] (Descarpentries) (NM, Basle) [examined]. Syn. n.

Worker. TL 2.7 - 3.2, HL 0.64 - 0.70, HW 0.54 - 0.60, CI 84 - 91, SL 0.40 - 0.46, SI 71 - 80, PW 0 - 42 - 0.48, AL 0.74 - 0.88 (5 measured).

Mandibles smooth with scattered small pits, median clypeal carina distinct. Frontal carinae extended back well beyond the level of the eyes, almost parallel and forming the upper margins of a shallow scrobe which is capable of accommodating the scape. With the alitrunk in profile the metanotal groove shallowly impressed. Propodeum armed with a pair of short, triangular teeth which are shorter than the broadly triangular metapleural lobes. Dorsum of head with very fine longitudinal rugulae and a distinct interrugal sculpture of fine but conspicuous superficial puncturation. Dorsal alitrunk finely rugulose, the pedicel and gaster unsculptured, smooth and shining. Erect or suberect long, fine hairs present on all dorsal surfaces of the body but may be absent from the pedicel segments. Colour yellow-brown.

A small and quite distinctive species, sikoraeHNS has nevertheless been confused with the cognatumHNS complex in the past. The best character for separating them lies in the fact that sikoraeHNS has numerous erect or suberect hairs on the first gastral tergite; such hairs being absent in cognatumHNS and its allies.

Within the schaufussi-group, sikoraeHNS forms the central species of what may be loosely termed the sikorae-complex, including the close pair of sikoraeHNS and schaufussiHNS, and the rather more distantly related xanthogasterHNS, all of them possessing, within the schaufussi-group, hairs on the first gastral tergite. In xanthogasterHNS the frontal carinae are feeble, scrobes are absent and the propodeal spines are quite long, besides which the species is bicoloured. The two remaining species are best separated by the characters given under schaufussiHNS.

Material examined

Madagascar: vic. Andasibe (= Perinet) (W. L. & D. E. Brown). Reunion I. (ex coll. Mayr).

Specimen Habitat Summary

Found most commonly in these habitats: 8 times found in rainforest, 3 times found in montane rainforest, 1 times found in montane rainforest, marsh edge, 2 times found in cultivated land (tavy), recent 1-2 years old tavy, 1 times found in forét, 1 times found in primary rainforest.

Found most commonly in these microhabitats: 10 times ex rotten log, 1 times ex rotten tree stump, 1 times ex rotten stick on ground, 1 times sifted litter (leaf mold, rotten wood), 1 times tronc, 1 times nest under bark.

Collected most commonly using these methods: 1 times GC, 1 times MW 25 sample transect, 5m, 1 times beating low vegetation.

Elevations: collected from 240 - 1499 meters, 997 meters average

Type specimens: Lectotype: casent0101260; paralectotype: casent0101259, casent0101898; syntype of Tetramorium sikorae: casent0101140; syntype of Xiphomyrmex latior: casent0101141, casent0101142, casent0101143, casent0101144



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