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Species: Tetramorium obtusidens   Viehmeyer, 1916 

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Taxonomic History (provided by Barry Bolton, 2023)

Tetramorium obtusidens Viehmeyer, 1916a PDF: 138, fig. 6 (q.) SINGAPORE. Indomalaya. Primary type information: Primary type material: 2 syntype queens. Primary type locality: Singapore: Jurong Road, 13: 26 (H. Overbeck). Primary type depository: MNHU. AntCat AntWiki HOL

Taxonomic history

Bolton, 1977 PDF: 101 (w.)
// Distribution


  Geographic regions (According to curated Geolocale/Taxon lists):
    Asia: Borneo, China, Indonesia, Malaysia, Philippines, Singapore, Thailand
  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 obtusidens ViehmeyerHNS

Following the removal of adelphonHNS and kydelphonHNS from the series formerly associated with obtusidensHNS it is necessary to make a few adjustments to the description of this species.

Worker. TL 2.4 - 2.7, HL 0.58 - 0.64, HW 0.49 - 0.54, CI 81 - 85, SL 0.38 - 0.42, SI 77 - 80, PW 0.34 - 0.38, AL 0.68 - 0.74 (8 measured).

With the general characters of the complex and of the bicarinatum-group to which it belongs, but with additional characters as follows. Frontal carinae less strongly developed than in adelphonHNS or kydelphonHNS, extending back beyond level of eye but weak, scarcely stronger than other cephalic rugulae. Maximum diameter of eye 0.12 - 0.14, about 0.25 - 0.27 x HW. Petiole node in dorsal view as broad or slightly broader than long. Dorsum of head irregularly longitudinally rugulose, with a reticulum occipitally. Dorsal alitrunk reticulate-rugulose but without a raised transverse carina at the promesonotal junction. Petiole dorsum with sparse rugulae, postpetiole dorsally with fine superficial punctulation, at most with only one or two very feeble longitudinal marks. Pilosity on dorsal surfaces of head and body much denser than in adelphonHNS or kydelphonHNS, the individual hairs finer and more flexuous than in those species. Colour pale yellow.

With the removal of adelphonHNS and kydelphonHNS, obtusidensHNS is known only from Singapore. To the present it is the smallest known member of the bicarinatum-group.

Specimen Habitat Summary

Found most commonly in these habitats: 1 times found in mixed deciduous forest.

Collected most commonly using these methods: 1 times fog sample, 1 times Malaise trap.

Elevations: collected at 614 m

Collect Date Range: collected between 1994-03-01 00:00:00.0 and 2006-10-01 00:00:00.0

Type specimens: type of Tetramorium obtusidens: focol2072, focol2073

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