Rediscovery of Mesagrion leucorrhinum (Zygoptera: Megapodagrionidae): a “formal” description of female and ultimate stadium of larva with notes on habits

León A. Pérez-Gutiérreza , Jenilee M. Montes-Fontalvob

  1. Grupo de investigación en Biodiversidad del Caribe colombiano, Departamento de Biología , Universidad del Atlántico, Barranquilla, Colombia
  2. Postgrado en Entomología, Museo del Instituto de Zoología Agrícola (MIZA), Facultad de Agronomía, Maracay, Venezuela

International Journal of Odonatology, Volume 14, Issue 1, Pages 91-100, 2011
https://doi.org/10.1080/13887890.2011.570162
Published: 1 March 211 (Received: 6 October 2010, Accepted: 14 February 2011)

Abstract

Adult female and ultimate stadium larva of Mesagrion leucorrhinum are formally described and illustrated based on material from three locations in Antioquia, Meta and Cundinamarca Departments, Colombia. The species is sexually dimorphic. The ♀ is distinguishable from other related genera by a pair of notches in the prothoracic anterior lobe and shares with Heteropodagrion and Dimeragrion females a yellowish, scarcely sclerotized region dorsally between the posterior margin of S7 and anterior border of S8. The larva is very similar to Heteropodagrion. Differences for separating them are: the pro-, meso- and metathoracic supracoxal processes are less prominent in Mesagrion, and the length of the terminal filament of the middle gill is notably longer in Mesagrion. The specimens were also compared with other related genera. Observations on habits are added.

Keywords: Odonata, Damselfly, Megapodagrionidae, Mesagrion, Heteropodagrion, female, larva, Colombia

Issue section: Article