Temnothorax kubira

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Temnothorax kubira
Scientific classification
Kingdom: Animalia
Phylum: Arthropoda
Class: Insecta
Order: Hymenoptera
Family: Formicidae
Subfamily: Myrmicinae
Tribe: Crematogastrini
Genus: Temnothorax
Species: T. kubira
Binomial name
Temnothorax kubira
(Terayama & Onoyama, 1999)

Temnothorax kubira focol1860 p 1 high.jpg

Temnothorax kubira focol1860 d 1 high.jpg

Specimen Labels

This species occurs in mountainous regions, and is known from about 600 m to 2,000 m above sea level in central Honshu (Kinomura et al., 1982), and from 1,300 m to 1,900 m on Yaku Island (Terayama & Yamane, 1984).

Identification

Terayama and Onoyama (1999) - Total length of workers around 2.5-3 mm. Body color reddish brown to brown; in some individuals the head and gaster are darker than the mesosoma, brown to blackish brown; legs yellow. Clypeus with a conspicuous median carina. Scapes relatively long, just reaching posterior margin of head in full-face view. Metanotal groove distinctly incised dorsally, but obscure in some individuals. Propodeal dorsum straight in profile. Propodeal spines narrowly triangular, about 1.7 times as long as their basal width. Petiolar node triangular or reverse U-shaped in profile, subpetiolar process very small.

T. kubira is similar to Temnothorax arimensis, but distinguished by the reddish brown to brown mesosoma and the more straight dorsal outline of mesonotum and propodeum.

Several populations from Hokkaido, Honshu, and Yaku Island show variations, but we treat here these as geographic variants within a single species. Further comparative studies are needed to determine their exact taxonomic statuses.

Keys including this Species

Distribution

Distribution based on Regional Taxon Lists

Palaearctic Region: Japan (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.

  • kubira. Leptothorax kubira Terayama & Onoyama, 1999: 89, figs. 11, 12 (w.q.) JAPAN. Combination in Temnothorax: Bolton, 2003: 271.

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

Description

Worker

Holotype. HL 0.70 mm; HW 0.55 mm; CI 79; SL 0.55 mm; SI 100; WL 0.85 mm; PW 0.40 mm; PtW 0.15 mm; PtH 0.21 mm; TL 2.8 mm.

Head 1.3 times as long wide, with evenly convex posterior margin in full-face view; sides behind eyes slightly converging posteriorly. Mandibles longitudinally rugulose. Anterior margin of median clypeal lobe weakly convex. Antennae with 12 segments; scapes relatively long, just reaching posterior margin of head in full-face view. Eyes moderate in size, maximum diameter 0.15 mm.

Promesonotal dorsum s lightly convex in profile. Metanotal groove incised dorsally. Propodeal dorsum straight in profile; propodeal spines in profile narrowly triangular, about 1.7 times as long as their basal width.

Petiolar node rather triangular in profile; dorsal margin of node forming an obtuse angle, anterior ma rgin weakly concave, posterior margin evenly convex. Subpetiolar process present, but very small. Postpetiole longer than high; node with a lmost straight dorsal margin in profile, in dorsal view 1.7 times as wide as long, with subparallel sides and straight anterior margin.

Clypeus with a distinct, long median carina, but smooth around the carina. Head dorsum longitudinally rugulose with a few cross-meshes. Occiput more reticulate, the spaces between densely punctulate. Mesosomal dorsum and pronotal s ides rugulose-punctulate, mesonotal and propodeal sides densely punctulate with some rugulae. Petiole and postpetiole densely punctulate. Gaster smooth and shining.

All dorsal surfaces on head and body with erect hairs, which are acute (not blunt) and relatively fine; the longest hair on mesosoma 0.10 mm.

Body color reddish brown to brown; gaster slightly darker than the mesosoma, grading brown to blackish brown; mandibles, antennae, and legs yellow.

Type Material

Holotype. Worker, Hanayama, 1,650 m alt., Yaku I., Kagoshima Pref., 17.IX.1983, Sk. Yamane leg. Paratypes. 4 workers, 1 female, same data as holotype; 3 workers, Hanayama, 1,300 m alt., Yaku I., Kagoshima Pref., 19.VII.1983, Sk. Yamane leg.; 1 worker, Mt. Kumotori, Saitama Pref., 5. VIII.1976, M. Terayama leg.; 1 worker, Yaku Pass, Ogano, Saitama Pref., 16.IV.1988, T. Nambu leg.

Determination Clarifications

This species corresponds to Leptothorax sp. 2 of Sonobe (1977), Leptothorax sp. 3 of Kinomura et al. 0982), and Leptothorax sp. 8 of Terayama et al. (1992).

References