Tetramorium severini (Emery) Bolton, B., 1979

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 : 138

publication ID

6435

DOI

https://doi.org/10.5281/zenodo.6282894

persistent identifier

https://treatment.plazi.org/id/F7273F5E-4677-7C12-C26E-7EF68BDA7B5E

treatment provided by

Christiana

scientific name

Tetramorium severini (Emery)
status

comb. n.

Tetramorium severini (Emery) View in CoL View at ENA   HNS comb. n.

(Fig. 8)

Xiphomyrmex severini Emery, 1895 b: 343   HNS . Syntype workers, Madagascar: Diego-Suarez, 1893 (C. Alluaud) (MCSN, Genoa; MHN, Geneva) [examined].

Worker. TL 4.5, HL 1.06, HW 0.94, CI 89, SL 0.76, SI 81, PW 0.72, AL 1.30.

Mandibles smooth with scattered small pits. Anterior clypeal margin with a distinct median indentation, the median clypeal carina strongly developed. Frontal carinae long and strong, the extensions forming the upper border of the scrobe which is capable of holding the scape. Metanotal groove distinct with alitrunk in profile. Propodeal spines long and acute, the metapleural lobes low and rounded. Dorsum of head with spaced-out longitudinal rugae which tend to peter out as they approach the occipital margin, the spaces between the rugae with some fine, superficial puncturation. Dorsal alitrunk mostly unsculptured and shining, with scattered, very faint, low rugulae which are almost completely effaced. Pedicel and gaster unsculptured, smooth and shining. Dorsal surfaces of head and alitrunk with scattered fine, elongate hairs, which are also present on the gastral tergites behind the first; pedicel and first gastral tergite without hairs. Colour black or blackish brown, uniform or with the gaster slightly lighter in shade than the alitrunk.

In his original description Emery was of the opinion that this species was related to andrei   HNS and latreillei   HNS but this has proved not to be the case as in both those species the mandibles are striate and the petiole nodes angular and sculptured, whereas in severini   HNS the mandibles are smooth and the petiole node is rounded and unsculptured, showing that the true affinities of severini   HNS lie with the members of the schaufussi-group and particularly with the small complex of species related to cognatum   HNS in which gastral pilosity is lost from the first tergite. The four species included in this complex are discussed under cognatum   HNS .

Kingdom

Animalia

Phylum

Arthropoda

Class

Insecta

Order

Hymenoptera

Family

Formicidae

Genus

Tetramorium

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