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Species: Strumigenys cordovensis   Mayr, 1887 


Classification:
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See Also:

Strumigenys cordovensis_cf

Taxonomic History (provided by Barry Bolton, 2017)

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

Taxonomic history

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

Distribution:


Nearctic Region: Puebla
Neotropical Region: Alajuela, Alta Verapaz, Americas, Aragua, Atlántida, Barinas, Belize, Brazil, Caribbean, Cartago, Central America, Chiapas, Chontales, Colombia, Comayagua, Costa Caribe Norte, Costa Caribe Sur, Costa Rica, Darién, Gracias a Dios, Guanacaste, Guatemala, Heredia, Honduras, Jinotega, Limón, Magdalena, Matagalpa, Mexico, Nicaragua, Nueva Segovia, Oaxaca, Olancho, Panama, Paraguay, Peru, Puntarenas, San José, South America, Suriname, Trinidad and Tobago, Venezuela, Veracruz

Distribution Notes:

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.

Specimen Habitat Summary

Found most commonly in these habitats: 22 times found in tropical rainforest, 18 times found in lowland rainforest, 15 times found in mature wet forest, 6 times found in 2º tropical rainforest, 6 times found in tropical wet forest, 4 times found in wet forest, 3 times found in mesophil forest, 3 times found in ridgetop cloud forest, 4 times found in montane wet forest, 4 times found in lowland wet forest, ...

Found most commonly in these microhabitats: 106 times ex sifted leaf litter, 1 times ex sifted litter, 2 times at bait, 1 times Ticoporo Forest Reserve. Dense second growth with few larger trees. Night collec, 1 times Ticoporo Forest Reserve. Dense second growth with few larger trees. Ex sifted le, 1 times on orchids, 1 times nocturnal forager on clay bank, 1 times Malaise trap, 1 times Hojarasca, 1 times ground forager(s), 1 times at tuna bait on ground, ...

Collected most commonly using these methods: 58 times MiniWinkler, 35 times MaxiWinkler, 16 times Winkler, 2 times Baiting, 1 times Berlese, 1 times Malaise, 1 times search.

Elevations: collected from 20 - 1250 meters, 413 meters average

Type specimens: syntype of Strumigenys cordovensis: casent0900430, casent0915689



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