Pheidole exarata

Longino, J. T., 2009, Additions to the taxonomy of New World Pheidole (Hymenoptera: Formicidae)., Zootaxa 2181, pp. 1-90: 31

publication ID

22820

publication LSID

lsid:zoobank.org:pub:F84E23F9-9FE9-4728-B51D-3078D6EDB7E2

persistent identifier

http://treatment.plazi.org/id/B1DD433D-AFD8-062C-9E72-C0B8ADC9B777

treatment provided by

Christiana

scientific name

Pheidole exarata
status

 

Pheidole exarata  HNS 

Pheidole exarata Emery  HNS  , 1896: 68. Syntype major, minor worker: Costa Rica, San Jose: San Jose [ MCSN] (not examined). See also: Wilson, 2003: 686.

Pheidole crassipes r. grantae Forel  HNS  , 1908: 53. Syntype major, minor worker: Costa Rica, Cartago: Cote Tablazo [a montane site near Cartago] (Biolley) [ MHNG] (examined). Wilson, 2003: 700: raised to species. New synonymy.

Geographic Range

Venezuela, Colombia, Costa Rica.

Biology

Pheidole exarata  HNS  occurs in mature wet forest habitats from 800-1600m elevation. It is arboreal, forming large colonies beneath epiphytes and in live stems. An incipient colony was found in a cavity in a live, 1.5cm diameter stem of a melastomataceous vine; a colony was found in several internodes of a Cecropia insignis sapling, another in an internode of Cecropia angustifolia; a large aggregation of minor and major workers, but no sexuals or brood, was found in a clean hollow stem of Neomirandea angularis (Asteraceae). One colony under epiphytes was observed with multiple dealate queens, evidence of polygyny.

Comments

The types of P. grantae  HNS  closely match the drawings of P. exarata  HNS  in Wilson (2003), the type localities are relatively close, and there is no evidence of distinct sympatric forms of this moderately common species in the central highlands of Costa Rica. Pheidole exarata  HNS  is an upland version of the closely related lowland species, P. excubitor Wilson. A third member of this complex is P. stulta Forel  HNS  (the oldest name in the complex). Pheidole stulta  HNS  is similar to P. exubitor  HNS  but with less sculpture on the face of the major and pronotum of the minor (Wilson 2003). Geographic variation is not well understood in these forms and the distinctness of P. exarata,  HNS  P. exubitor  HNS  and P. stulta  HNS  should be further evaluated.

MCSN

Italy, Genova, Museo Civico di Storia Naturale "Giacomo Doria"

MHNG

Switzerland, Geneva, Museum d'Histoire Naturelle

Kingdom

Animalia

Phylum

Arthropoda

Class

Insecta

Order

Hymenoptera

Family

Formicidae

Genus

Pheidole