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Key to Costa Rican Adelomyrmex


10a. Postpetiole acute posteriorly, projecting over gaster: silvestrii

10b. Postpetiole broadly rounded posteriorly, not projecting over gaster: 20


20a. Mesosomal dorsum irregularly rugose: 50

20b. Mesosomal dorsum regularly striate: tristani

20c. Mesosomal dorsum at least partially smooth: 90


50a Eye relatively larger, composed of 7 facets on average; pilosity on mesosoma and gaster relatively longer; propodeal suture relatively more step-like; size relatively larger; color darker: myops

50b. Eye relatively smaller, composed of 4 or fewer facets; pilosity on mesosoma and gaster relatively shorter; propodeal suture less step-like; size relatively smaller; color lighter: longinoi


90a. Face sculpture composed almost entirely of widely spaced foveae separated by smooth and shining spaces, or face almost entirely smooth, rugae confined to median portion of face between frontal carinae, distance between foveae subequal to foveum diameter; very large species: 95

90b. Face more prominently rugose, foveae when present more dense, separated by less than their diameter; size generally smaller: 100


95a. Foveae on face conspicuous, well-developed: brenesi

95b. Face nearly smooth, foveae very faint: JTL-007


100a. Propodeal spines relatively short, subacute; dorsum of promesonotum smooth and shiny medially, with irregular striations peripherally; hypostomal tooth, if visible at all, a minute, sharp dentical: brevispinosus

100b. Propodeal spines relatively longer, sharply acute; dorsum of promesonotum almost entirely smooth and shining; hypostomal tooth variably developed, but often relatively large, sharp to blunt: 150


150a. Lateral portions of face (antennal scrobe areas) with widely spaced foveae, intervals smooth and shining; eyes composed of about 7 facets; hypostomal tooth small but distinct, in the form of a sharp denticle; dorsal pilosity moderately long and dense; color red brown: foveolatus

150b. Lateral portions of face with confluent rugae and foveae, without smooth and shining interspaces; eyes composed of about 7 facets; hypostomal tooth stout, in the form of an acute to blunt tooth; dorsal pilosity moderately long and dense; color dark brown: laevigatus

150c. Lateral portions of face with confluent rugae and foveae, without smooth and shining interspaces; eyes composed of 2 facets; hypostomal tooth small but distinct, in the form of a sharp denticle; dorsal pilosity very long and dense; color red brown: microps

150d. Fernandez (in Fernandez and MacKay 2003) states "Very similar to A. foveolatus, but distinguished by: smaller size, eyes reduced to one ommatidium; foveae more dense, hypostomal teeth larger, mesosomal sides with some rugulae and color lighter." minimus


Page author:

John T. Longino, The Evergreen State College, Olympia WA 98505 USA.longinoj@evergreen.edu


Date of this version: 24 August 2006.
Previous versions of this page: 13 October 2000
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