Cryptopone sauteri

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Cryptopone sauteri
Scientific classification
Kingdom: Animalia
Phylum: Arthropoda
Class: Insecta
Order: Hymenoptera
Family: Formicidae
Subfamily: Ponerinae
Tribe: Ponerini
Genus: Cryptopone
Species: C. sauteri
Binomial name
Cryptopone sauteri
(Wheeler, W.M., 1906)

One of the most common ant species in temperate Japan.

Identification

Worker. Total length of workers around 3.5 - 4 mm. Color yellow to yellowish brown. Body covered thickly with golden hairs. Mandibles with 9 or 10 teeth. Dorsal outline of clypeus gently sloping in lateral view. Subpetiolar process developed, subtriangular and with an angled ventral tip.

Distribution

Distribution based on Regional Taxon Lists

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

Distribution based on AntMaps

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Distribution based on AntWeb specimens

Check data from AntWeb

Biology

This species nests in rotting wood and leaf litter in forests. Colony size is relatively large compared to other Korean ponerine ants.

Yamaguchi et al. (2017) studied life history details of this species in Niigata Prefecture, Japan. The area (37 05´N, 138 37´E) was a mixed deciduous and coniferous forest. Winters snowfall and cold temperatures restrict ant activity to the warmer months of the year. Dead branches, where C. sauteri nest were collected every two weeks between May and November in 2008 and 2009, and their demographic attributes recorded.

Sixty percent of the 331 nests found were queenless, with the number of mated queens, when present, increasing into the fall. This suggests seasonal polydomy. Unmated queens were also present, and relatively abundant, but did not change in number with time of year.

Alates were present in August and September, which suggests fall mating flights. All queens were winged. Worker numbers increased in the fall, suggesting workers and sexuals were produced together. Larvae were collected throughout the year but decreased toward the fall. Pupae were found between July and September. This suggests workers and alates emerge just once a year. Eggs were found only during three nest collection periods. Egg laying by queens was not determined but mated queens with a developed ovary were collected between May and November (Yamaguchi et al., 2016), suggesting that they lay eggs over the months.

Castes

Nomenclature

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

  • sauteri. Pachycondyla (Pseudoponera) sauteri Wheeler, W.M. 1906c: 304, pl. 41, fig. 6 (w.q.) JAPAN. Ogata, 1987: 118 (m.); Imai & Kubota, 1972: 194 (k.). Combination in Euponera (Pseudoponera): Emery, 1909c: 365; in Euponera (Trachymesopus): Teranishi, 1940: 8; in Cryptopone: Brown, 1963: 6; in Pachycondyla: Mackay & Mackay, 2010: 3 (by implication as Cryptopone synonymised with Pachycondyla); in Cryptopone: Schmidt & Shattuck, 2014: 185.

Description

Karyotype

  • n = 14, 2n = 28 (Japan) (Imai & Yosida, 1964; Imai, 1969; Imai & Kubota, 1972).

References