Overview

Comprehensive Description

Dorylus (Anomma) nigricans subspecies sjoestedti Emery HNS

Three large workers from Faradje, Niangara, and Medje, taken from the stomachs of toads (Bwfo regularis and B. superciliaris) and a frog (Rana occipitalis); also a large series of workers from Farad je (Lang and Chapin).

This form closely resembles subspecies burmeisteri variety HNS molestus (Gerstaecker) HNS in having the inferoposterior angles of the petiole prolonged outward as distinct tubercles, but is readily distinguished by having the head of the larger workers (7 to 12.5 mm.) opaque instead of shining and that of the smaller workers elongate.

An interesting account of the habits of rubellus HNS and sjoestedti HNS has been published by Sjostedt.1

  • Wheeler, W. M. (1922): The ants collected by the American Museum Congo Expedition. Bulletin of the American Museum of Natural History 45, 39-269: 48-48, URL:http://plazi.org:8080/dspace/handle/10199/17097
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Taxonomic History

Dorylus nigricans sjoestedti Emery, 1899d PDF: 461 (w.) CAMEROUN. AntCat AntWiki

Taxonomic history

Santschi, 1912b PDF: 160 (s.); Raignier & Boven, 1955: 98 (q.).
Raised to species: Wasmann, 1916b PDF: 136.
Currently subspecies of Dorylus nigricans: Wheeler, 1922: 741.
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Physical Description

Diagnostic Description

Taxonomic Treatment

Wheeler, W. M., 1922:
 Three large workers from Faradje, Niangara, and Medje, taken from the stomachs of toads (Bwfo regularis and B. superciliaris) and a frog (Rana occipitalis); also a large series of workers from Farad je (Lang and Chapin).
  This form closely resembles subspecies burmeisteri varietymolestus (Gerstaecker) in having the inferoposterior angles of the petiole prolonged outward as distinct tubercles, but is readily distinguished by having the head of the larger workers (7 to 12.5 mm.) opaque instead of shining and that of the smaller workers elongate.
  An interesting account of the habits of rubellus and sjoestedti has been published by Sjostedt.1
 
Creative Commons Attribution Non Commercial Share Alike 1.0 (CC BY-NC-SA 1.0)

Source: AntWeb

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Three large workers from Faradje, Niangara, and Medje, taken from the stomachs of toads (Bwfo regularis and B. superciliaris) and a frog (Rana occipitalis); also a large series of workers from Farad je (Lang and Chapin).

 

This form closely resembles subspecies burmeisteri varietymolestus (Gerstaecker) in having the inferoposterior angles of the petiole prolonged outward as distinct tubercles, but is readily distinguished by having the head of the larger workers (7 to 12.5 mm.) opaque instead of shining and that of the smaller workers elongate.

 

An interesting account of the habits of rubellus and sjoestedti has been published by Sjostedt.1

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Wheeler, W. M.

Source: Plazi.org

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