Camponotus sphenocephalus

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Camponotus sphenocephalus
Scientific classification
Kingdom: Animalia
Phylum: Arthropoda
Class: Insecta
Order: Hymenoptera
Family: Formicidae
Subfamily: Formicinae
Tribe: Camponotini
Genus: Camponotus
Species: C. sphenocephalus
Binomial name
Camponotus sphenocephalus
Emery, 1911

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Specimen Labels

Collected in moist tropical forest at Rio Tambopata Reserve.

Identification

A member of the subgenus Myrmostenus.

Mackay (1997) - This species has a strongly and densely punctate head, a strongly convex clypeus with well-developed median carina, with numerous erect, coarse hairs on the underside of the head. The head is strongly narrowed posteriorly, with a rounded vertex. It is not closely related to any of the other known species, but is most similar to Camponotus longipilis and Camponotus postangulatus.

This species can be easily separated from all others as the head, including the clypeus, is strongly sculptured. The head is strongly narrowed posteriorly, similar to that found in Camponotus leptocephalus. It would not be confused with C. leptocephalus, which has abundant erect hairs on the top and bottom of the head, C. sphenocephalus has only a few, scattered hairs on these surfaces. This species is related to C. longipilis, but can be easily separated by the sculpture of the clypeus and the shape of the head.

Keys including this Species

Distribution

Latitudinal Distribution Pattern

Latitudinal Range: -12.83333333° to -12.83333333°.

 
North
Temperate
North
Subtropical
Tropical South
Subtropical
South
Temperate

Distribution based on Regional Taxon Lists

Neotropical Region: Peru (type locality).

Distribution based on AntMaps

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Distribution based on AntWeb specimens

Check data from AntWeb

Countries Occupied

Number of countries occupied by this species based on AntWiki Regional Taxon Lists. In general, fewer countries occupied indicates a narrower range, while more countries indicates a more widespread species.

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Estimated Abundance

Relative abundance based on number of AntMaps records per species (this species within the purple bar). Fewer records (to the left) indicates a less abundant/encountered species while more records (to the right) indicates more abundant/encountered species.

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Biology

Castes

Nomenclature

The following information is derived from Barry Bolton's Online Catalogue of the Ants of the World.

  • sphenocephalus. Camponotus sphenocephalus Emery, 1911a: 225 (q.) PERU.
    • Combination in C. (Myrmamblys): Forel, 1914a: 272;
    • combination in C. (Myrmostenus): Emery, 1920b: 260.
    • Status as species: Emery, 1925b: 161; Kempf, 1972a: 59; Bolton, 1995b: 125; Mackay, 1997: 202 (redescription); Bezděčková, et al. 2015: 113.

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

Description

Queen

Mackay (1997) - HL 3.51-3.66, HW 1.78-1.96, SL 2.86-3.06, EL 0.78-0.81, clypeal length 1.34-1.36, clypeal width 0.93-0.95. Indices: SI 80-84, CI 51-54, clypeal index 68-70.

Mandible with 6 teeth; clypeus strongly convex with well-defined carina; anterior clypeal border concave; scape extending past posterior border of head; head widened anteriorly and strongly narrowed posteriorly; vertex convex; maxillary and labial palps, mesosoma, petiole and gaster similar to that of Camponotus longipilis.

Hairs erect, coarse and scattered on head, mesosoma, petiole and gaster; decumbent pubescence short and dilute on most surfaces.

Sculpture more coarse than other species, head strongly and densely punctuate, including surface of clypeus; mesosoma and gaster with much weaker sculpture than head, similar to other species except for Camponotus mirabilis.

Color medium to dark brown, head, mandibles and scapes dark brown, gaster with slightly lighter splotches in same positions as in Camponotus mirabilis.

Type Material

Mackay (1997) - Holotype queen, Pachitea, Peru, Stdg; sphenocephalus Emery (Museo Civico di Storia Naturale, Genoa) [seen].

References

References based on Global Ant Biodiversity Informatics

  • Bezdeckova K., P. Bedecka, and I. Machar. 2015. A checklist of the ants (Hymenoptera: Formicidae) of Peru. Zootaxa 4020 (1): 101–133.
  • Emery C. 1911. Fragments myrmécologiques. Annales de la Société Entomologique de Belgique 55: 213-225.
  • Fernández, F. and S. Sendoya. 2004. Lista de las hormigas neotropicales. Biota Colombiana Volume 5, Number 1.