Camponotus dumetorum

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Camponotus dumetorum
Scientific classification
Kingdom: Animalia
Phylum: Arthropoda
Class: Insecta
Order: Hymenoptera
Family: Formicidae
Subfamily: Formicinae
Tribe: Camponotini
Genus: Camponotus
Species: C. dumetorum
Binomial name
Camponotus dumetorum
Wheeler, W.M., 1910

Camponotus dumetorum casent0005342 profile 1.jpg

Camponotus dumetorum casent0005342 dorsal 1.jpg

Specimen labels

This ant appears to be the dominant insect of the chaparral. It nests in the ground among the bushes, forming flat craters varying from a few inches to a foot in diameter, with a round or, more frequently, elongate entrance. It does not go abroad in the day time, at least during the dry season. The number of its nests in the chaparral is surprising, but it is difficult to study these, except in places where the brush has been burned over or where it has been c1eared away to leave fire guards. The workers probably derive their sustenance from the aphids and coccids on the scrub-oaks (Quercus dumosa) and other bushes that compose the chaparral. (Wheeler 1910)

Identification

Distribution

Distribution based on Regional Taxon Lists

Nearctic Region: United States (type locality).
Neotropical Region: Mexico.


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.

  • dumetorum. Camponotus maculatus subsp. dumetorum Wheeler, W.M. 1910d: 354 (s.w.m.) U.S.A. Combination in C. (Myrmoturba): Wheeler, W.M. 1917a: 560; in C. (Camponotus): Emery, 1925b: 75; in C. (Tanaemyrmex): Creighton, 1950a: 377. Subspecies of sansabeanus: Emery, 1925b: 75. Junior synonym of maccooki: Creighton, 1950a: 377. Revived from synonymy and raised to species: Snelling, R.R. 1970: 396.

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

Description

Worker

Major Length, 10-13 mm.; head, 3.3 x 3 mm.; scape, 2.5 mm.; hind tibia, 3 mm.

Combining characters of Camponotus maccooki and the typical Camponotus vicinus. Antennal scape not only flattened at the base but dilated to form a lobule which is even larger than that of maccooki and often obtusely angular. Body coarsely shagreened; head and thorax subopaque, gaster slightly shining. Clypeus with several large, elongate, piligerous foveolae; cheeks with more numerous and smaller, elongate foveolae; remainder of head feebly punctate; frontal region with a few deep, piligerous punctures. Hairs and pubescence as in the typical vicinus, yellow, the former absent on the cheeks, erect and abundant on the dorsal and gular surfaces of the head, thoracic dorsum, petiolar border, gaster and flexor surfaces of the femora. Pubescence long but sparse, conspicuous on the head, pleurae, legs and gaster. Head, mandibles, scapes and gaster black; funiculi, legs, thorax, petiole and extreme base of first gastric segment dull brown.

Minor Length, 6-9 mm.

Resembling the worker major, but with the usual differences in the shape of the head, which is often more or less brown like the thorax, especially in front. The lobule at the base of the antennal scape is very large and conspicuous and more angular, so that the scape at this point may be broader than at the tip.

Male

Length, 10-11 mm.

Resembling the male of vicinus, but the head is proportionally shorter and broader, the cheeks are more convex and the scapes are flattened and lobulated at the base. The whole head, especially its, sides and gular surface, is conspicuously hairy. Pleurae, gaster and legs also with numerous, but less conspicuous, erect, tawny yellow hairs. Head and thorax opaque, gaster and legs more shining, but the whole surface densely shagreened. Body black; funiculi and tarsi brown; wings suffused with yellow, with yellow veins and stigma.

Type Material

Described from numerous specimens taken from many colonies in the dry foot-hills of the San Gabriel Range near Pasadena and Claremont, California, up to an altitude of 2,000 feet.

References

  • Creighton, W. S. 1950a. The ants of North America. Bull. Mus. Comp. Zool. 104: 1-585 (page 377, Combination in C. (Tanaemyrmex), junior synonym of macooki)
  • Emery, C. 1925d. Hymenoptera. Fam. Formicidae. Subfam. Formicinae. Genera Insectorum 183: 1-302 (page 75, Combination in C. (Camponotus), subspecies of sansabeanus)
  • Snelling, R. R. 1970. Studies on California ants, 5. Revisionary notes on some species of Camponotus, subgenus Tanaemyrmex (Hymenoptera: Formicidae). Proc. Entomol. Soc. Wash. 72: 390-397 (page 396, Revived from synonymy and raised to species.)
  • Wheeler, W. M. 1910g. The North American ants of the genus Camponotus Mayr. Ann. N. Y. Acad. Sci. 20: 295-354 (page 354, soldier, worker, male described)
  • Wheeler, W. M. 1917a. The mountain ants of western North America. Proc. Am. Acad. Arts Sci. 52: 457-569 (page 560, Combination in C. (Myrmoturba))