Tetramorium sjostedti

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Tetramorium sjostedti
Scientific classification
Kingdom: Animalia
Phylum: Arthropoda
Class: Insecta
Order: Hymenoptera
Family: Formicidae
Subfamily: Myrmicinae
Tribe: Crematogastrini
Genus: Tetramorium
Species: T. sjostedti
Binomial name
Tetramorium sjostedti
Forel, 1915

Nothing is known about the biology of Tetramorium sjostedti.

Identification

Bolton (1977) - One of the larger Tetramorium species, sjostedti is approached in size only by Tetramorium laticephalum in the Australian fauna but is easily separated from that species by the characters given in the key. Apparently this rather spectacular species remains known only from the original collection.

Keys including this Species

Distribution

Distribution based on Regional Taxon Lists

Australasian Region: Australia (type locality).

Distribution based on AntMaps

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Distribution based on AntWeb specimens

Check data from AntWeb

Biology

Castes

Nomenclature

The following information is derived from Barry Bolton's New General Catalogue, a catalogue of the world's ants.

  • sjostedti. Tetramorium (Xiphomyrmex) sjostedti Forel, 1915b: 48 (w.) AUSTRALIA. Combination in Xiphomyrmex: Viehmeyer, 1925a: 28; in Tetramorium: Bolton, 1977: 140.

Unless otherwise noted the text for the remainder of this section is reported from the publication that includes the original description.

Description

Worker

Bolton (1977) - Lectotype. TL 5.6, HL 1.42, HW 1.34, CI 94, SL 0.92, SI 69, PW 0.94, AL 1.54.

Mandibles longitudinally striate, the anterior clypeal margin without a median notch. Eyes large, maximum diameter c. 0·30 (about 0.22 x HW), situated slightly behind the midlength of the sides. Frontal carinae strongly developed to just behind the level of the eyes, then fading into the surrounding sculpture. Scapes relatively short and stout, dorsoventrally compressed basally so that in dorsal view the scapes are distinctly broader basally than at their midlength and the anterior margin turns through a sharp angle to meet the basal constriction (Fig. 73). Occipital margin of head strongly impressed. Pronotum and mesonotum marginate laterally, propodeum not marginate. Metanotal groove completely absent, the dorsal alitrunk evenly convex in profile. Anterior pronotal corners acute in dorsal view. Propodeal spines long, stout and acute, the metapleural lobes elongate, acute and directed upwards (Fig. 74). Petiole in profile with the tergal portion higher than the dorsal length, in dorsal view the node very slightly broader than long, broader behind than in front. Entire dorsum of head and space between eyes and frontal carinae regularly and strongly longitudinally rugose, the spaces between the rugae densely reticulate-punctate. Sides and dorsum of alitrunk similarly sculptured, the declivity of the propodeum transversely rugose. Petiole and postpetiole coarsely but less regularly rugose, with some reticulation. Basal half of the first gastral tergite finely longitudinally striate, the spaces between the striae densely punctulate. Long stout hairs present on all dorsal surfaces of head and body.

Type Material

Bolton (1977) - Lectotype worker, Australia: N. Western Australia, Kimberley Distr. (Mjoberg) (Naturhistoriska Riksmuseet), here designated [examined].

  • Tetramorium (Xiphomyrmex) sjostedti: Lectotype, worker, Kimberley distr., Western Australia, Australia, Naturhistoriska Riksmuseet.

References