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Species: Strumigenys cordovensis   Mayr, 1887 

Classification:
Download Data

Taxonomic History (provided by Barry Bolton, 2014)

Strumigenys cordovensis Mayr, 1887 PDF: 573 (w.) MEXICO. AntCat AntWiki

Taxonomic history

Senior synonym of Strumigenys mokensis: Bolton, 2000: 531.
See also: Brown, 1958c}: 218.

Distribution:

Widespread, from southern Mexico south to Brazil and Paraguay. Costa Rica: both slopes to 500m.

Biology:

Natural History:

Brown and Wilson (1959) summarize the genus as follows:

"Widespread in tropics and warm temperate areas. Primarily forest-dwelling; some species occur in grassland and arid scrub. ... Nests mostly in soil and rotting wood; a few species live in arboreal plant cavities in tropical rain forest. Foraging hypogaeic to epigaeic-arboreal. Food: most species are collembolan feeders; a few are polyphagous predators or occasionally feed on sugary substances..."

Brown (1958) states that the extremely long mandibles of cordovensis are possibly used

"to lift the prey, presumed to be mainly or entirely furculate collembolans as in other species of the genus, clear of the ground after the mandibular strike is made, in this way preventing the springtails from kicking with the furcula against the ground and upsetting the ant. Such disproportionately large mandibles must be employed almost entirely in the open, because confined spaces would surely hinder their action."

However, Bolton (1999) has shown that all members of the genus use a kinetic mode of attack, in which the prey is stunned prior to grasping and lifting. This suggests that the long mandibles of cordovensis simply give the species a greater striking power and reach, rather than allowing struggling prey to be lifted clear of the ground.

In Costa Rica this species occurs in dry and wet forest habitats. It inhabits forest floor leaf litter.

References:

Bolton, B. 1999. Ant genera of the tribe Dacetonini (Hymenoptera: Formicidae). J. Nat. Hist. 33:1639-1689.

Bolton, B. 2000. The ant tribe Dacetini, with a revision of the Strumigenys species of the Malagasy Region by Brian L. Fisher, and a revision of the Austral epopostrumiform genera by Steven O. Shattuck. Memoirs of the American Entomological Institute 65:1-1028.

Brown, W. L., Jr. 1958. The neotropical species of the ant genus Strumigenys Fr. Smith: Group of cordovensis Mayr. Studia Entomologica 1:217-224.

Brown, W. L., Jr. 1962. The neotropical species of the ant genus Strumigenys Fr. Smith: Synopsis and keys to the species. Psyche 69:238-267.

Brown, W. L., Jr., Wilson, E. O. 1959. The evolution of the dacetine ants. Quarterly Review of Biology 34:278-294.

Taxonomic Treatment (provided by Plazi)

Wild, A. L., 2007:
Concepción (BMNH, MHNG). Literature records: Concepción (Bolton 2000).

Forel, A., 1905:
- [[ worker ]]. - Long. 3,2 mill. - Depression transversale du pronotum plus faible que chez la forme typique. Les mandibules sont aussi longues, mais pas plus longues que la tete (beaucoup plus longues chez la cordo- vensis typique). Elles ont a leur bord interne une rangee reguliere de longs poils qui se croisent et ressemblent aux cordes tendues d'un instrument de musique en miniature. Les scapes n'atteignent pas tout a fait l'angle occipital (le depassent plutot chez la cordovensis typique). La tete est aussi un peu moins elargie derriere. Du reste identique.
La Moka, Venezuela (Meinert), 1 [[ worker ]].

Specimen Habitat Summary

Found most commonly in these habitats: 20 times found in tropical rainforest, 15 times found in mature wet forest, 6 times found in tropical wet forest, 6 times found in 2º tropical rainforest, 3 times found in ridgetop cloud forest, 4 times found in lowland wet forest, 3 times found in mesophil forest, 4 times found in montane wet forest, 3 times found in wet forest, 3 times found in 2º lowland rainforest, ...

Collected most commonly using these methods or in the following microhabitats: 36 times MiniWinkler, 28 times MaxiWinkler, 15 times Winkler, 1 times search, 1 times Baiting, 1 times Berlese, 1 times Malaise

Elevations: collected from 20 - 1250 meters, 396 meters average

Type specimens: syntype of Strumigenys cordovensis: casent0900430, casent0915689

(-1 examples)



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