Microdaceton viriosum

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Microdaceton viriosum
Scientific classification
Kingdom: Animalia
Phylum: Arthropoda
Class: Insecta
Order: Hymenoptera
Family: Formicidae
Subfamily: Myrmicinae
Tribe: Attini
Genus: Microdaceton
Species: M. viriosum
Binomial name
Microdaceton viriosum
Bolton, 2000

Microdaceton viriosum casent0102252 profile 1.jpg

Microdaceton viriosum casent0102252 dorsal 1.jpg

Specimen labels

Specimens have been collected in litter-samples from wet forest.


Bolton (2000) - In the type-series the first gastral tergite and sternite are both superficially sculptured in at least their basal halves; the propodeal spines are stout, straight to slightly downcurved. With the head in profile the highest point of the vertex has a pair of small, low, obtuse tubercles. Another, smaller, tubercle is present anterior to this pair, the three together forming the points of a triangle.

Keys including this Species


Distribution based on Regional Taxon Lists

Afrotropical Region: Uganda (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.

  • viriosum. Microdaceton viriosum Bolton, 2000: 29, figs. 24, 28, 32 (w.q.) UGANDA.

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



Holotype. TL 4.2, HL 1.10, HW 1.04, CI 95, ML 0.64, MI 58, SL 0.70, SI 67, PW 0.52, AL 0.94. Answering the description of Microdaceton tibialis except as follows.

1. Mesonotum with a pair of truncated blunt tubercles.

2. Petiole node in profile grossly inflated, enormous when compared to postpetiole.

3. Larger species with shorter mandibles and scapes (compare measurements) .

Paratypes. TL 3.7-4.2, HL 1.04-1.10, HW 0.99-1.06, CI 95-99, ML 0.60-0.64, MI 56-60, SL 0.67-0.72, SI 66-70, PW 0.50-0.54, AL 0.86-0.94 (8 measured).

Type Material

Holotype worker, Uganda: Ruwenzori Mts, Kilembe, 1 550 m., 5.v.1992 (Erne & Cuccodoro) (Musee d'Histoire Naturelle Genève). Paratypes. 1 1 workers and 1 queen with same data as holotype (NHM, The Natural History Museum, Museum of Comparative Zoology).


  • Bolton, B. 2000. The ant tribe Dacetini. Memoirs of the American Entomological Institute. 65:1-1028. (page 29, figs. 24, 28, 32 worker, queen described)