Formicidae, Hymenoptera, Insecta, Arthropoda, Animalia
Costa Rica (Atlantic slope).
Promesonotal suture very faintly impressed, not breaking sculpture; scapes surpass margin of vertex when laid back; mandibles approaching a subfalcate condition; basal margin erose, with a distinct concave notch near junction with apical margin; propodeum completely unarmed.
Known records of G. volcano:
Alajuela: Casa Eladio, Rio Penas Blancas, 10¡19'N, 84¡43'W, 800m (J. Longino). Mature wet forest; ex sifted leaf litter from forest floor (Winkler sample).
Heredia: 17km N Vol. Barba, 10¡17'N, 84¡05'W, 800m (J. Longino). Mature wet forest; ex sifted leaf litter from forest floor (Winkler sample) [holotype].
Lattke's G. volcano and G. transversa (from premontane forest in Bocas del Toro region of Panama) look nearly identical from the figures and type descriptions. The only difference I can detect is the development of a notch between basal and masticatory margins of mandible in volcano. My specimens from Penas Blancas (INBIOCRI001281043) are somewhat intermediate in the development of this notch.
Gnamptogenys volcano Lattke 1995:191. Holotype worker: Costa Rica, Heredia: 17km N Vol. Barba, 10¡17'N, 84¡05'W, 800m (J. Longino) [LACM].
Lattke, J. E. 1995. Revision of the ant genus Gnamptogenys in the New World (Hymenoptera: Formicidae). Journal of Hymenoptera Research 4:137-193.
John T. Longino, The Evergreen State College, Olympia WA 98505 USA.email@example.com
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