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Genus: Proatta   Forel, 1912 

Classification:

Taxonomic History (provided by Barry Bolton, 2018)

Extant: 1 valid species

Proatta Forel, 1912n PDF: 768. Type-species: Proatta butteli, by monotypy. AntCat AntWiki HOL

Taxonomic history

[Proatta also described as new by Forel, 1913l PDF: 84.].
Genus Proatta references
Emery, 1924f PDF: 333 (diagnosis, catalogue); Moffett, 1987 PDF: 444 (review of genus); Cantone, 2017 PDF: 230 (brief male diagnosis)

Taxon Page Images:



Proatta butteli is a polygynous species; nests typically contain numerous fertile queens. Danum Valley Field Centre, Sabah Borneo.
Image © Alex Wild.

Distribution:

   (According to curated Geolocale/Taxon lists)   Genus is native to: Indomalaya bioregion (based on species list records).

Indomalaya Region: Indonesia, Malaysia, Singapore, Thailand, Vietnam

Taxonomic Treatment (provided by Plazi)

Treatment Citation: Eguchi, K., Viet, B. T. & Yamane, S., 2011, Generic synopsis of the Formicidae of Vietnam (Insecta: Hymenoptera), Part I - Myrmicinae and Pseudomyrmicinae., Zootaxa 2878, pp. 1-61

Proatta ForelHNS, 1912

Taxonomy. The genus ProattaHNS is assigned to StenamminiHNS by Bolton (1994, 2003). It contains a single species, Proatta butteliHNS.

Worker monomorphic; head in full-face view elongate-pentagonal, with a shallow central longitudinal depression; preoccipital region forming four tubercles dorsally and a bilobate lobe laterally; frontal lobe very large and raised; frontal carina and antennal scrobe absent; median portion of clypeus protruded anteriad, in lateral view forming a steep anterior face; median clypeal seta absent; lateral portion of clypeus modified into a ridge or wall in front of antennal insertion; posteromedian portion of clypeus narrowly inserted between frontal lobes; antenna 12- segmented with indistinct 3-segmented club; eye small, convex well laterad; mandible triangular; masticatory margin with apical and two preapical teeth, followed by an inconspicuous tooth (4 teeth in total); promesonotum domed, with 3 pairs of tubercles dorsally, a tubercle anterolaterally, and a forked tubercle on posterior slope; promesonotal suture absent; metanotal groove well defined; a small tubercle present on dorsum of propodeum behind groove; propodeal spine long; propodeal lobe well developed as a round lamella; petiole with long peduncle and low node which has tubercles anterodorsally and posterodorsally; postpetiole short and high; gastral shoulder absent; standing hairs absent from dorsum of body (simple standing hairs present at apex of gaster and on mandible, slightly clavate hairs on second and third segments of gaster).

The worker of Proatta butteliHNS is easily separated from that of other known Vietnamese myrmicine genera by the tuberculate head and mesosoma.

Vietnamese species. The single described species in the genus is known from Vietnam: butteli ForelHNS (Nam Cat Tien, Phu Quoc).

Bionomics. Proatta butteliHNS is found in lowland forests of southern Vietnam, and nests under stones and wood fragments and in soil around tree bases. Adults are brick red and dull and are clad in dirt. When their nests are exposed, the cryptic workers freeze for a while, making them very difficult to detect.



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