John E. Lattke piquihuye@gmail.com
John T. Longino longinoj@evergreen.edu
Date of this version: 3 March 2009.
Previous versions of this page: 28 May 1999.
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Formicidae, Hymenoptera, Insecta, Arthropoda, Animalia
Range
Costa Rica to southwestern Colombia. Costa Rica: Cordillera de Guanacaste.
Identification
In usual resting position, mandibles flush against anterior border of clypeus; clypeus large and triangular, completely concealing labrum; petiolar node subcuboidal, with distinct vertical anterior and posterior faces in lateral view; cephalic dorsum mostly densely punctate; lateral clypeal process forms almost a perpendicular angle with the base of median process; eye diameter occupies approximately one-third of lateral cephalic margin, eye situated laterally on head in frontal cephalic view; metapleural - propodeal suture distinct; anteroventral mesopleural carina well developed, forming cupped rounded lobe anterad.
Worker metrics (n=6). HL (0.94-1.08); HW (0.64-0.74); ML (0.51-0.61); EL (0.20-0.20); SL (1.08-1.25); WL (1.52-1.75) mm. CI (0.66-0.69); MI (0.77-0.86); OI (0.27-0.32); SI (1.64-1.76).
Natural History
A Volc‡n Rinc—n de la Vieja series came from a column of workers that were captured as they worked together to transport an isopod.
Comments
The shallow depression that suggests a separation between the anepisternum and katepisternum is unusual in the genus as the mesopleuron usually appears as a single unit in workers, bearing no trace of this separation. Specimens from Panama have the metapleural propodeal sutures more developed and consequently the metapleuron stands out quite distinctly, and the mesopleuron has a more irregular surface with broad swellings and depressions.
Page authors:
John E. Lattke piquihuye@gmail.com
John T. Longino longinoj@evergreen.edu
Date of this version: 3 March 2009.
Previous versions of this page: 28 May 1999.
Go back to top