Wasmannia rochai Forel,

Longino, J. T. & Fernández, F., 2007, Taxonomic review of the genus Wasmannia., Advances in ant systematics (Hymenoptera: Formicidae): Homage to E. O. Wilson - 50 years of contributions. (Memoirs of the American Entomological Institute 80), pp. 271-289: 279-280

publication ID

21284

persistent identifier

http://treatment.plazi.org/id/3FF28900-5889-8D8F-1DAA-0D861106B959

treatment provided by

Christiana

scientific name

Wasmannia rochai Forel
status

 

Wasmannia rochai Forel  HNS 

Wasmannia rochai Forel  HNS  , 1912: 1. Syntype worker: Ceara, Brazil (Diaz da Rocha) [ MHNG]  (examined, one worker here designated LECTOTYPE).

Comments

Wasmannia rochai  HNS  occurs widely in the mainland Neotropics, from Guatemala south to Sao Paulo state in Brazil. The syntype workers from Ceara are slightly larger than workers from Panama and Costa Rica, but with similar proportions. The differences between rochai  HNS  and sigmoidea  HNS  are subtle but consistent. Compared to sigmoidea  HNS  , rochai  HNS  is smaller, with a relatively shorter and broader head. The propodeal spines are shorter and are directed posteriorly, instead of upturned in sigmoidea  HNS  . The setae on the face, mesosoma, and gaster are more curved, appearing shorter than the setae of sigmoidea  HNS  because of the greater curvature. They are also more clavate, swelling noticeably at the tips.

In some specimens of rochai  HNS  the outer margin of the antennal scrobe is weakly defined, approaching the condition seen in affinis  HNS  and lutzi  HNS  . However, the face sculpture of rochai  HNS  is always much more feeble than the coarse reticulate rugose sculpture on affinis  HNS  and lutzi  HNS  .

Kempf (1972) recorded the range of rochai  HNS  as Panama, the Guianas, Trinidad, and six Brazilian states from Ceara south to Sao Paulo. Given the prior uncertainty of species differences among affinis  HNS  , lutzi  HNS  , rochai  HNS  , and sigmoidea  HNS  , earlier determinations should be treated cautiously pending reexamination of existing material. We have examined material from Guatemala, Costa Rica, Venezuela, and Brazil (Amazonas, Bahia, Ceara, and Sao Paulo states).

This species appears to be rare in Costa Rica, although its superficial similarity to W. auropunctata  HNS  may result in its being overlooked in a sea of the latter species. Only two Costa Rican collections are known: Phil Ward collected workers and a dealate queen (PSW # 7628) in a recent treefall at Carara Biological Reserve. The senior author collected a lone dealate queen in a canopy tree at Sirena in Corcovado National Park. The species has been collected multiple times on Barro Colorado Island in Panama, where it is a relatively common part of the canopy ant fauna (Mike Kaspari pers. comm.).

MHNG

Switzerland, Geneva, Museum d'Histoire Naturelle

MHNG

Switzerland, Geneva, Museum d'Histoire Naturelle

MHNG

Switzerland, Geneva, Museum d'Histoire Naturelle

MHNG

Switzerland, Geneva, Museum d'Histoire Naturelle