Temnothorax spinosior

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Temnothorax spinosior
Scientific classification
Kingdom: Animalia
Phylum: Arthropoda
Class: Insecta
Order: Hymenoptera
Family: Formicidae
Subfamily: Myrmicinae
Tribe: Crematogastrini
Genus: Temnothorax
Species: T. spinosior
Binomial name
Temnothorax spinosior
(Forel, 1901)

Temnothorax spinosior casent0906180 p 1 high.jpg

Temnothorax spinosior casent0906180 d 1 high.jpg

Specimen Labels

Terayama and Onoyama (1999) - T. spinosior is found in dry open areas, such as grasslands and bare places. It nests in the soil. A queen body size dimorphism is known (Hamaguchi & Kinomura, 1996). Most larger queens are found in monogynous colonies while most smaller queens are found in polygynous colonies. Workers are found on the ground, seldom on trees. Nuptial flights occur in July (Sonobe, 1980). The chromosome number is 2n = 24 (Imai & Yosida, 1965).


T. spinosior most resembles Temnothorax eburneipes with notes about the distinctions between these two species noted under the latter.

Terayama and Onoyama (1999) - Total length of workers around 2 mm. Body color black to blackish brown. Scapes almost reaching posterior margin of head in full-face view. Dorsal outline of mesosoma weakly and evenly convex in profile. Metanotal groove incised dorsally. Propodeal. spines long, acute and narrow somewhat downcurved. Petiolar node in profile triangular (in some specimens dorsum narrowly convex and not angulate), with weakly convex posterior margin (almost straight in some specimens).

Keys including this Species


Distribution based on Regional Taxon Lists

Palaearctic Region: China, Japan (type locality), Republic of Korea.

Distribution based on AntMaps


Distribution based on AntWeb specimens

Check data from AntWeb




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

  • spinosior. Leptothorax congruus var. spinosior Forel, 1901e: 371 (w.) JAPAN. Wheeler, W.M. 1906c: 317 (q.); Imai, 1966: 119 (k.). Combination in Temnothorax: Bolton, 2003: 271. Raised to species: Terayama & Satoh, 1990b: 532. See also: Terayama & Onoyama, 1999: 93.

Type Material

Terayama and Onoyama (1999) - Worker. Type locality: Sapporo (Matsumura leg.). [Two syntype workers in Musee d'Histoire Naturelle Genève examined.] Unless otherwise noted the text for the remainder of this section is reported from the publication that includes the original description.



  • n = 12, 2n = 24 (Japan) (Imai, 1966; Imai, 1969; Imai, 1974; Imai & Yosida, 1964; Fischer, 1987) (as Leptothorax spinosior).

Determination Clarifications

All the previous records of T. spinosior from Yaku Island (Terayama & Yamane, 1984) were Temnothorax anira, and no reliable record of this species is known from the island.

Radchenko (2004) - Among rich investigated material from North Korea (more than 100 specimens) I did not find T. spinosior, but Temnothorax eburneipes only; records of T. spinosior from South Korea and China need confirmation.