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Genus: Rhopalomastix   Forel, 1900 

Classification:

Taxonomic History (provided by Barry Bolton, 2018)

Extant: 6 valid species, 2 valid subspecies

Rhopalomastix Forel, 1900a PDF: 24. Type-species: Rhopalomastix rothneyi, by monotypy. AntCat AntWiki HOL

Taxonomic history

Genus Rhopalomastix references
Emery, 1922c PDF: 118 (diagnosis, catalogue); Wheeler, 1929e PDF: 95 (review of genus); Chapman & Capco, 1951 PDF: 111 (Asia checklist); Taylor & Brown, 1985: 86 (Australia catalogue); Taylor, 1987a PDF: 66 (Australia checklist); Bolton, 1994: 105 (synoptic classification); Bolton, 1995a PDF: 1052 (census); Bolton, 1995b: 377 (catalogue); Xu, 1999A PDF: 130 (China species key); Shattuck, 1999: 161 (Australia synopsis); Cantone, 2017 PDF: 232 (brief male diagnosis)

Distribution:

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

Afrotropical Region: Tanzania
Australasia Region: Australia, Papua New Guinea
Indomalaya Region: Bangladesh, India, Indonesia, Malaysia, Pakistan, Philippines, Singapore, Sri Lanka, Taiwan, Thailand, Vietnam
Palearctic Region: China, Japan

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

Rhopalomastix ForelHNS, 1900

Taxonomy. The genus RhopalomastixHNS is assigned to the tribe MelissotarsiniHNS (Bolton 2003). The worker of the single Vietnamese species has the following features.

Worker monomorphic; head subrectangular; frontal carina and antennal scrobe absent; frontal lobes touching or separated only by a narrow longitudinal impression; median portion of clypeus weakly convex anteriorly, lacking median clypeal seta but bearing a pair of thick and short submedian setae; mandible small, with 4 teeth; antenna 10-segmented, with 2-segmented club; scape very short, extending a little beyond midlength of head when laid backwards; eye relatively large, located well in front of midlength of side of head; mesosoma box-shaped; promesonotal suture absent dorsally; metanotal groove absent; propodeum unarmed; metapleural gland bulla large; propodeal lobe absent; fore- and hindfemora extremely widened and flattened distally; petiole nodiform, with relatively high node, anteroventrally with well-developed subpetiolar process; postpetiole much shorter than high, broadly attached to anteriormost portion of gaster; gastral shoulder absent.

The worker of RhopalomastixHNS is easily separated from those of other known Vietnamese myrmicine genera by a combination of the following characters: frontal lobes closely approximated; eye relatively large; mesosoma box-shaped; fore- and hindfemora extremely widened and flattened distally; postpetiole broadly attached to gaster.

Vietnamese species. One species has been found from Vietnam: sp. eg-1 [= sp. 3 of SKY: Eguchi et al., 2005] (Pu Mat, Tam Dao).

Bionomics. RhopalomastixHNS nests in spaces under the bark of standing tree trunks.



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