Strumigenys umboceps

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

Known from two litter-sample collections from a ridgetop cloud forest.


Bolton (2000) - A member of the Strumigenys schulzi-group. A member of the microthrix-complex, umboceps is easily isolated by its high-domed head, presence of obviously spatulate clypeal pilosity, distinctive pilosity on the first gastral tergite, very small propodeal teeth and swollen postpetiole.

Keys including this Species


Distribution based on Regional Taxon Lists

Neotropical Region: Ecuador (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.

  • umboceps. Pyramica umboceps Bolton, 2000: 227 (w.) ECUADOR. Combination in Strumigenys: Baroni Urbani & De Andrade, 2007: 130

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



Holotype. TL 1.9, HL 0.50, HW 0.38, CI 76, ML 0.09, MI 18, SL 0.26, SI 68, PW 0.26, AL 0.50. Anterior clypeal margin broadly evenly convex. Clypeal dorsum with conspicuously spatulate curved hairs, those near the posterior margin the largest and most elevated. Cephalic dorsum with anteriorly curved suberect hairs behind highest point of vertex. Head in profile with vertex strongly raised into a high narrowly rounded tumulus: dorsal outline behind clypeus shallowly concave, then rising steeply at about the level of the eye; summit of tumulus behind level of eye and outline then forming a shallowly convex steep slope down to the occiput. Scrobe shallow, short and broad, its dorsal margin very weakly defined behind level of frontal lobes. Eye with 3 ommatidia in longest row. Dorsum of promesonotum not flattened. Femoral gland bullae elongate and conspicuous; bullae very obviously much longer than broad. Propodeal teeth extremely small. Both mesopleuron and metapleuron with extensive smooth areas. Petiole in dorsal view with node about as long as broad, in profile with a long stout peduncle and the node bluntly convex; postpetiole swollen and subglobular. Disc of postpetiole in dorsal view with a mostly smooth median patch. Dorsal alitrunk and waist segments with spatulate ground-pilosity that is curved and subreclinate. First gastral tergite smooth behind the short basigastral costulae, with numerous short fine hairs that are closely appressed and acute apically. Each hair arises from a very conspicuous pit and is directed posteromedially.

Type Material

Holotype worker, Ecuador: Prov. Pichincha, Tinalandia, 16 km. SE S. Domingo de los Colorados, (S. & J. Peck) (Museum of Comparative Zoology).


  • 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 227, worker described)

References based on Global Ant Biodiversity Informatics

  • Fernández, F. and S. Sendoya. 2004. Lista de las hormigas neotropicales. Biota Colombiana Volume 5, Number 1.
  • Longino J. T. L., and M. G. Branstetter. 2018. The truncated bell: an enigmatic but pervasive elevational diversity pattern in Middle American ants. Ecography 41: 1-12.
  • Longino J. et al. ADMAC project. Accessed on March 24th 2017 at