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Species: Octostruma ascrobis   Longino, 2013 


Classification:
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Taxonomic History (provided by Barry Bolton, 2017)

Octostruma ascrobis Longino, 2013 PDF: 18, figs 1H, 3G, 6C, 14I, 17, 44 (w.q.) GUATEMALA. Neotropic. AntCat AntWiki

Overview:

A cryptic inhabitant of forest floor leaf litter and rotten wood; from lowland rainforests; Mexico to Costa Rica.

Distribution:

(based on species list records)
Neotropical Region: Americas, Atlántida, Belize, Central America, Chiapas, Costa Caribe Norte, Costa Rica, El Salvador, Guatemala, Heredia, Honduras, Izabal, Jinotega, Limón, Matagalpa, Mexico, Nicaragua, Petén

Distribution Notes:

Mexico (Chiapas) to Costa Rica.

Biology:

This species inhabits lowland rainforest, from sea-level to 1000 m elevation, but is most abundant below 500 m. All specimens are from samples of sifted leaf litter and rotten wood from the forest floor. Frequencies in quantitative samples of 1 m2 litter plots range from 0–16%. Dealate queens occasionally occur in samples, and one sample contained an alate queen. Worker number in samples is always < 10.

Identification:

Antennal scrobe very shallow, not distinctly margined; face with arcuate carina; frontal carinae extending back and joining termini of facial arc. Octostruma convallis is similar, but the frontal carinae and facial arc do not join. They are separated by a transverse trough, and the termini of the facial arc extend laterally beyond the termini of the frontal carinae.

Comments:

The name refers to the lack of sharply delimited antennal scrobes.

Specimen Habitat Summary

Found most commonly in these habitats: 17 times found in tropical moist forest, 6 times found in tropical rainforest, 8 times found in 2º lowland tropical rainforest, 5 times found in 2º lowland rainforest, 6 times found in mature wet forest, 5 times found in tropical wet forest, 1 times found in Primary wet forest, 1 times found in montane rain forest, 1 times found in montane wet forest, 1 times found in ridgetop cloud forest, ...

Found most commonly in these microhabitats: 51 times ex sifted leaf litter, 1 times ex sifted leaf litter and rotten wood, 1 times bajo de M/20.

Collected most commonly using these methods: 38 times MiniWinkler, 11 times MaxiWinkler, 1 times winkler, 1 times Berlese, 1 times Berlese/Winkler, 1 times flight intercept trap, 1 times Mini Winkler.

Elevations: collected from 50 - 990 meters, 339 meters average

Type specimens: holotype Octostruma ascrobis Longino 2013: casent0611295; paratype Octostruma ascrobis Longino 2013: casent0611224, casent0611225, casent0611425, casent0611426



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