Strumigenys mormo

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

Strumigenys mormo casent0915950 p 1 high.jpg

Strumigenys mormo casent0915950 d 1 high.jpg

Specimen Labels

Known only from the type material, nothing is known about the biology of Strumigenys mormo.

Identification

Bolton (2000) - A member of the laticeps complex in the Strumigenys argiola group. The distribution of orbicular hairs on the head of mormo is quite different from that seen in Strumigenys roomi. In mormo there is a transverse band of 2-3 rows of orbiculars immediately behind the clypeus between the frontal lobes. Behind this there are 1-2 pairs close to the dorsal midline that are flanked by a bald patch of depressed cuticle that extends out to the lateral margin on each side. Posterior to this, across the broadest part of the head, is another band of 3 transverse rows of orbicular hairs. In roomi the area immediately behind the clypeus and between the frontal lobes does not have orbicular hairs, only minute appressed spatulate hairs. An oblique row of orbiculars parallels the upper scrobe margin on each side, commencing some distance behind the frontal lobes, and behind this is a transverse band of three rows of similar hairs.

Keys including this Species

Distribution

Distribution based on Regional Taxon Lists

Afrotropical Region: Democratic Republic of Congo (type locality).

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.

  • mormo. Pyramica mormo Bolton, 2000: 290 (w.) DEMOCRATIC REPUBLIC OF CONGO. Combination in Strumigenys: Baroni Urbani & De Andrade, 2007: 124

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

Description

Worker

Holotype. 2.2, HL 0.52, HW 0.64, CI 123, ML 0.24, MI 46, SL 0.31, SI 48, PW 0.39, AL 0.58. Closely related to Strumigenys roomi and Strumigenys anorbicula, and like those species having the apicodorsal mandibular tooth very long and spiniform, a feature not developed in other Afrotropical species of the group. S. anorbicula is easily isolated as it lacks cephalic orbicular hairs and has several other isolating characters (see there). Workers of the other two differ as follows.

S. mormo: Distal half of mandible with two small preapical teeth. Two specialised hairs arising on dorsal mandible in distal half are long, fine and narrow. Orbicular hairs present on dorsum of head immediately behind posterior clypeal margin. Cephalic dorsum behind upper scrobe margin depressed on each side, the depressed areas without orbicular hairs. Large hairs on leading edge of scape not strongly inclined toward the apex of the subbasal lobe. Larger species with longer mandibles, HL 0.52, MI 46.

Strumigenys roomi: Distal half of mandible with a single preapical tooth. Two specialised hairs arising on dorsal mandible in distal half are short, broad and flattened. Small spatulate hairs present on dorsum of head immediately behind posterior clypeal margin. Cephalic dorsum behind upper scrobe margin not depressed, orbicular hairs forming a continuous transverse arch. Large hairs on leading edge of scape strongly inclined toward the apex of the subbasal lobe. Smaller species with shorter mandibles, HL 0.42-0.47, MI 35-38.

Type Material

Holotype worker, Zaire (“Congo Belge” on data label): no exact locality, 10 5 (H. Franz) (Naturhistorisches Museum Wien, Vienna).

References

  • 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)