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Species: Octostruma cyrtinotum   Longino, 2013 

Classification:
Download Data

Taxonomic History (provided by Barry Bolton, 2021)

Octostruma cyrtinotum Longino, 2013b PDF: 28, figs 1C, 3B, 5L, 13A, 14B, 22, 43 (w.q.) HONDURAS. Neotropic. AntCat AntWiki

Overview:

A cryptic inhabitant of forest floor leaf litter and rotten wood; cloud forests of Honduras and Nicaragua. // Distribution

Distribution:

  Geographic regions (According to curated Geolocale/Taxon lists):
    Americas: Honduras, Nicaragua
  Biogeographic regions (According to curated Bioregion/Taxon lists):
    Neotropical

Distribution Notes:

Honduras, Nicaragua.

Biology:

Octostruma cyrtinotum is a moderately abundant montane species in Honduras and Guatemala. All records are from 1300–1700 m. It occurs in mesophyll cloud forest, and montane forests with various mixtures of pine, oak, and Liquidambar. All collections are from Berlese and Winkler samples of sifted litter and rotten wood from the forest floor. In quantitative 1 m2 litter plot samples, it can occur in up to 28% of samples. Dealate queens are occasionally found together with workers in litter samples.

Identification:

Face lacking transverse arcuate carina; basal five teeth of mandible acute; apex of labrum bilobed; face typically with 8 spatulate setae, seta-bearing pits along vertex margin large; filiform setae lacking on petiole, postpetiole, first gastral sternite; anterior half of dorsal face of propodeum convex, demarcating impressed metanotal groove; a single pair of spatulate setae on the mesonotum.

Comments:

This species is very similar to the allopatric O. montanis, from montane sites in southern Nicaragua and northern Costa Rica. The two differ only in small differences in the number of spatulate setae. The three species O. cyrtinotum, O. montanis, and O. planities possibly form a clade based on shared labral shape, similar size and shape, and orange coloration. Octostruma planities is a lowland species, showing an elevational parapatric distribution with both O. cyrtinotum and O. montanis.

The name refers to the convexity on the propodeal dorsum.

Specimen Habitat Summary

Found most commonly in these habitats: 95 times found in cloud forest, 8 times found in mixed hardwood forest, 7 times found in ridgetop cloud forest, 5 times found in montane wet forest, 1 times found in oak cloud forest, 1 times found in Liquidambar-hardwood forest, 1 times found in mixed oak-pine forest, 1 times found in pine-mesophyll forest, 1 times found in tropical montane forest, 1 times found in disturbed cloud forest, ...

Found most commonly in these microhabitats: 121 times ex sifted leaf litter, 3 times ex sifted litter, 1 times pit fall.

Collected most commonly using these methods: 76 times MiniWinkler, 42 times MaxiWinkler, 6 times Winkler, 1 times pit fall.

Elevations: collected from 990 - 1710 meters, 1426 meters average

Collect Date Range: collected between 2009-05-12 and 2013-05-04

Type specimens: holotype Octostruma cyrtinotum Longino 2013: casent0615495; paratype Octostruma cyrtinotum Longino 2013: casent0627374, casent0627375, casent0627376, casent0639167, casent0639168, casent0639169, casent0639170, casent0639171



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