Lasiomyrma

Identification
General (2015) - Lasiomyrma has an anterior median clypeus produced into an obtuse angle, 11-segmented antenna, elongate-triangular mandibles that usually close tightly with anterior clypeal margin (line drawing of frontal head shows a gap in Lasiomyrma gracilinoda Terayama & Yamane, 2000), flat dorsum of promesonotum and propodeum, propodeal spines present, and a pedunculate petiole (Terayama & Yamane 2000).

Eguchi, Bui and Yamane (2011) - All of the described species of Lasiomyrma have 11-segmented antennae (Terayama & Yamane 2000, Jaitrong 2010). However, a single worker of Lasiomyrma collected from northern Vietnam (L. sp. eg-1) has 12-segmented antennae, thus the worker diagnosis of the genus given in Terayama & Yamane (2000) should be widened as “antenna 11- or 12-segmented”. The worker of Lasiomyrma is morphologically very similar to those of Lordomyrma bhutanensis (Baroni Urbani) and Lordomyrma sinensis (Ma, Xu, Makio & DuBois) which were recently transferred to Lordomyrma from Stenamma by Branstetter (2009). These Lordomyrma species completely lack antennal scrobes and have the apex of anterior clypeal margin with a small projecting tooth. We provisionally accept Lasiomyrma as a valid genus but suggest that a comprehensive re-examination of Lordomyrma and Lasiomyrma is needed.

Species richness
Species richness by country based on regional taxon lists (countries with darker colours are more species-rich). View Data



Nomenclature

 *  LASIOMYRMA [Myrmicinae: Stenammini]
 * Lasiomyrma Terayama & Yamane, 2000: 523. Type-species: Lasiomyrma gedensis, by original designation.

Eguchi, Bui and Yamane (2011) - The worker of the single known Vietnamese species has the following features. Worker probably monomorphic; head in lateral view subrectangular; frontal carina and antennal scrobe absent;median portion of clypeus forming steep anterior face, with weak submedian carinae; anteromedian portion of clypeus forming a transverse strip with anterior margin weakly pointed in middle, lacking an isolated median seta; posteromedian portion of clypeus relatively narrowly inserted between frontal lobes; mandible elongate-trianglar, with 8 teeth that decrease in size from apex to base; antenna 12-segmented, with inconspicuous 3-segmented club;eye well developed; promesonotum in lateral view slightly convex, only a little higher than anterior border of propodeum, in dorsal view with obtusely angulate humeri; promesonotal suture absent dorsally; metanotal groove distinct; propodeal spine distinct; propodeal lobe present as a small angulate lobe; petiole pedunculate, with high and thin node; postpetiole higher than long, in lateral view roundly convex dorsally; gastral shoulder absent.