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Camponotus sphenocephalus
| 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
| |
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 |
- Source: AntMaps
Distribution based on Regional Taxon Lists
Neotropical Region: Peru (type locality).
Distribution based on AntMaps
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
Images from AntWeb
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| Holotype of Camponotus sphenocephalus. Queen (alate/dealate). Specimen code casent0905510. Photographer Z. Lieberman, uploaded by California Academy of Sciences. | Owned by MSNG, Genoa, Italy. |
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
- Emery, C. 1911d. Fragments myrmécologiques. Ann. Soc. Entomol. Belg. 55: 213-225 (page 225, queen described)
- Emery, C. 1920b. Le genre Camponotus Mayr. Nouvel essai de la subdivision en sous-genres. Rev. Zool. Afr. (Bruss.) 8: 229-260 (page 260, Combination in C. (Myrmostenus))
- Forel, A. 1914a. Le genre Camponotus Mayr et les genres voisins. Rev. Suisse Zool. 22: 257-276 (page 272, Combination in C. (Myrmamblys))
- Mackay, W.P. 1997. A revision of the Neotropical ants of the genus Camponotus, subgenus Myrmostenus. Proceedings of the Entomological Society of Washington. 99:194-203.
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.