Strumigenys marchosias

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Strumigenys marchosias
Scientific classification
Kingdom: Animalia
Phylum: Arthropoda
Class: Insecta
Order: Hymenoptera
Family: Formicidae
Subfamily: Myrmicinae
Tribe: Attini
Genus: Strumigenys
Species: S. marchosias
Binomial name
Strumigenys marchosias
(Bolton, 2000)

Pyramica marchosias casent0005654 profile 1.jpg

Pyramica marchosias casent0005654 dorsal 1.jpg

Specimen labels

This species has been collected from rainforest and includes samples taken from under a stone and sifted litter.


Bolton (2000) - A member of the laticeps complex in the Strumigenys argiola group. At first glance this species closely resembles Strumigenys tiglath, but in that species the mandible has only a single small preapical tooth, the proximal flattened hair on the mandible dorsum arises at about the midlength of the mandible and the outer strap-like hair on the anterior clypeal margin is no more than 0.50 X ML. In addition, the apicodorsal tooth of tiglath is obviously not spiniform.

Keys including this Species


Distribution based on Regional Taxon Lists

Afrotropical Region: Central African Republic, Gabon (type locality).

Distribution based on AntMaps


Distribution based on AntWeb specimens

Check data from AntWeb





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

  • marchosias. Pyramica marchosias Bolton, 2000: 290 (w.q.) GABON. Combination in Strumigenys: Baroni Urbani & De Andrade, 2007: 123

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



Holotype. TL 1.7, HL 0.43, HW 0.51, CI 119, ML 0.18, MI 41, SL 0.22, SI 43, PW 0.32, AL 0.48. Apicodorsal tooth of mandible spiniform but relatively short, only as long as, or fractionally longer than, the apicoventral tooth. Mandible with 2 small preapical teeth, both in the apical quarter; distal preapical tooth very close to apicodorsal tooth. Dorsal surface of mandible with 2 flattened hairs, located in the apical third of the length; these hairs project over the preapical teeth and partially conceal them in full-face view. Proximal flattened hair on each mandible arises well into the apical half of the mandible length. Anterior clypeal margin with 4 broad long strap-like hairs that project anteriorly, the outer pair > 0.50 X ML and longer than the inner pair. Cephalic dorsum with large orbicular hairs present from posterior clypeal margin to close to occipital margin. With alitrunk in profile dorsal outline of mesonotum not raised posteriorly into a convex hump.

Paratypes. TL 1.5-1.7, HL 0.37-0.42, HW 0.45-0.51, CI 119-125, ML 0.14-0.18, MI 40-45, SL 0.19-0.22, SI 40-43, PW 0.27-0.32, AL 0.40-0.46 (4 measured).

Type Material

Holotype worker, Gabon: Provo Woleu-Ntem, 31.3 km. 108° ESE Minvoul, 2°04.8' N, 12°24.4'E, 600 m., 1l.ii.1998, #1684(47) (B.L. Fisher) (The Natural History Museum).

Paratypes. 2 workers with same data as holotype but samples #1684 (7 and 22); 2 workers and 1 queen (dealate), Gabon: Provo Estuaire, F.C. Mondah, 21 km. 331° NNW Libreville, 0034.6'N, 9°20.1'E, 10 m., 24.ii.1998, #1742 (sample numbers 12, 28, and 29), sifted litter (leaf mold, rotten wood) , littoral rainforest (B.L. Fisher) (BMNH, Museum of Comparative Zoology, South African Museum, coll. Fisher).


  • Baroni Urbani, C. & De Andrade, M.L. 2007. The ant tribe Dacetini: limits and constituent genera, with descriptions of new species. Annali del Museo Civico di Storia Naturale “G. Doria”. 99:1-191.
  • Bolton, B. 2000. The ant tribe Dacetini. Memoirs of the American Entomological Institute. 65:1-1028. (page 290, worker described)

References based on Global Ant Biodiversity Informatics

  • Bolton, B. 2000. The Ant Tribe Dacetini. Memoirs of the American Entomological Institute 65