Cyphomyrmex hamulatus

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Cyphomyrmex hamulatus
Scientific classification
Kingdom: Animalia
Phylum: Arthropoda
Class: Insecta
Order: Hymenoptera
Family: Formicidae
Subfamily: Myrmicinae
Tribe: Attini
Genus: Cyphomyrmex
Species: C. hamulatus
Binomial name
Cyphomyrmex hamulatus
Weber, 1938

Cyphomyrmex hamulatus casent0901673 p 1 high.jpg

Cyphomyrmex hamulatus casent0901673 d 1 high.jpg

Specimen Labels


Little is known about the biology of this species.


Kempf (1966) - The sharp carinae and spines and the striking hook-like pilosity arising from minute but sharp tubercles on gaster characterize the present species.


Snelling and Longino (1992) - The range of Cyphomyrmex hamulatus extends from Trinidad to Venezuela and north to Costa Rica

Distribution based on Regional Taxon Lists

Neotropical Region: Bolivia (type locality), Brazil, Brazil, Colombia, Panama, Trinidad and Tobago, Venezuela.

Distribution based on AntMaps


Distribution based on AntWeb specimens

Check data from AntWeb



This species is only known from the workers.


The following information is derived from Barry Bolton's New General Catalogue, a catalogue of the world's ants.

  • hamulatus. Cyphomyrmex rimosus subsp. hamulatus Weber, 1938b: 190 (w.) BOLIVIA. Wheeler, G.C. & Wheeler, J. 1983: 608 (l.). Raised to species: Kempf, 1966: 197. Senior synonym of trinitatis: Snelling, R.R. & Longino, 1992: 490.
  • trinitatis. Cyphomyrmex rimosus subsp. trinitatis Weber, 1938b: 189 (w.q.) TRINIDAD. Junior synonym of hamulatus: Snelling, R.R. & Longino, 1992: 490.



Kempf 1966 Cyphomyrmex 1-13.jpg

Kempf (1966) - Total length 2.7 mm; head length 0.66 mm; head width 0.63-0.66 mm; thorax length 0.88-0.93 mm; hind femur length 0.72-0.75 mm. Ferruginous, with head and gaster somewhat infuscated. Very close to Cyphomyrmex rimosus but presenting the following particularities:

Frontal carinae quite sinuous (fig 9). Antennal scape surpassing the occipital corner - which bears a minute acute denticle - by a distance equalling its maximum width. Funicular segments II and III combined as long as segment I. Eyes with 7-8 facets across the greatest diameter. All carinae very sharp and somewhat foliaceous. Promesonotal tubercles acutely pointed (fig 22). Basal face and upper half of declivous face of epinotum laterally carinate. Hind femora (fig 47) angulate at basal third, postero-ventral border with a narrow foliaceous crest. Petiolar node rather transverse, strongly constricted behind. Postpetiole with a shallow and broad postero-median impression, flanked by a pair of low and inconspicuous lateral ridges, terminating behind in a low rounded tubercle, not very prominent in profile; postero-lateral impressions rather deep. Tergum I of gaster with a very short and vestigial antero-median impression; sides of same tergum rather sharply marginate. Hairs short, simple and hooked, those of gaster are produced on distinct tubercles.

Type Material

Kempf (1966) - A few workers taken in March 1922 by W. M. Mann at Cachuela Esperanza on the lower Beni River in Bolivia. Four specimens (syntypes: NAW, MCZ, WWK) examined.


  • Kempf, W. W. 1966 [1965]. A revision of the Neotropical fungus-growing ants of the genus Cyphomyrmex Mayr. Part II: Group of rimosus (Spinola) (Hym., Formicidae). Stud. Entomol. 8: 161-200 (page 197, Raised to species)
  • Snelling, R. R.; Longino, J. T. 1992. Revisionary notes on the fungus-growing ants of the genus Cyphomyrmex, rimosus group (Hymenoptera: Formicidae: Attini). Pp. 479-494 in: Quintero, D., Aiello, A. (eds.) Insects of Panama and Mesoamerica: selected stu (page 490, Senior synonym of trinitatis)
  • Weber, N. A. 1938b. The biology of the fungus-growing ants. Part IV. Additional new forms. Part V. The Attini of Bolivia. Rev. Entomol. (Rio J.) 9: 154-206 (page 190, worker described)
  • Wheeler, G. C.; Wheeler, J. 1983a. Supplementary studies on ant larvae: Myrmicinae. Trans. Am. Entomol. Soc. 108: 601-610 (page 608, larva described)