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Rhopalomastix rothneyi
Scientific classification
Kingdom: Animalia
Phylum: Arthropoda
Class: Insecta
Order: Hymenoptera
Family: Formicidae
Subfamily: Myrmicinae
Tribe: Crematogastrini
Genus: Rhopalomastix
Forel, 1900
Type species
Rhopalomastix rothneyi
8 species
(Species Checklist)

Rhopalomastix rothneyi casent0178531 profile 1.jpg

Rhopalomastix rothneyi

Rhopalomastix rothneyi casent0178531 dorsal 1.jpg

Specimen Label

Rhopalomastix nests in spaces under the bark of standing tree trunks.


Eguchi, Bui and Yamane (2011) - The worker of Rhopalomastix 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.

Keys including this Genus


World distribution based on political regions. View/Edit Data
Rhopalomastix Distribution.png Worlddistribution legend.jpg

Species richness

Species richness by country based on regional taxon lists (countries with darker colours are more species-rich). View Data

Rhopalomastix Species Richness.png




Worker Morphology

 • Antennal segment count 10 • Antennal club 2 • Palp formula 1,1; 0,1 • Total dental count 2-4 • Spur formula 0, 0 • Sting present

Male Morphology

 • Antennal segment count 12 • Antennal club gradual • Palp formula 1,1 • Total dental count 0 • Spur formula 0, 0


The following information is derived from Barry Bolton's New General Catalogue, a catalogue of the world's ants.

  • RHOPALOMASTIX [Myrmicinae: Melissotarsini]
    • Rhopalomastix Forel, 1900a: 24. Type-species: Rhopalomastix rothneyi, by monotypy.

Unless otherwise noted the text for the remainder of this section is reported from the publication that includes the original description.

Eguchi, Bui and Yamane (2011) - 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.


  • Bolton, B. 2003. Synopsis and Classification of Formicidae. Mem. Am. Entomol. Inst. 71: 370pp (page 258, Rhopalomastix in Myrmicinae, Melissotarsini)
  • Eguchi, K., Bui, T.V. & Yamane, S. 2011. Generic synopsis of the Formicidae of Vietnam. Part 1 – Myrmicinae and Pseudomyrmecinae. Zootaxa 2878: 1-61. PDF
  • Emery, C. 1914e. Intorno alla classificazione dei Myrmicinae. Rend. Sess. R. Accad. Sci. Ist. Bologna Cl. Sci. Fis. (n.s.) 18: 29-42 (page 40, Rhopalomastix in Myrmicinae, Melissotarsini)
  • Emery, C. 1922c. Hymenoptera. Fam. Formicidae. Subfam. Myrmicinae. [part]. Genera Insectorum 174B: 95-206 (page 118, Rhopalomastix in Myrmicinae, Melissotarsini)
  • Forel, A. 1900a. Un nouveau genre et une nouvelle espèce de Myrmicide. Ann. Soc. Entomol. Belg. 44: 24-26 (page 24, Rhopalomastix as genus)
  • Forel, A. 1917. Cadre synoptique actuel de la faune universelle des fourmis. Bull. Soc. Vaudoise Sci. Nat. 51: 229-253 (page 242, Rhopalomastix in Myrmicinae, Melissotarsini)
  • Wheeler, W. M. 1910b. Ants: their structure, development and behavior. New York: Columbia University Press, xxv + 663 pp. (page 140, Rhopalomastix in Myrmicinae, Solenopsidini)
  • Wheeler, W. M. 1922i. Ants of the American Museum Congo expedition. A contribution to the myrmecology of Africa. VII. Keys to the genera and subgenera of ants. Bull. Am. Mus. Nat. Hist. 45: 631-710 (page 661, Rhopalomastix in Myrmicinae, Melissotarsini)
  • Wheeler, W. M. 1929e. The ant genus Rhopalomastix. Psyche (Camb.) 36: 95-101 (page 95, Review of genus)
  • Xu, Z. 1999a. Systematic studies on the ant genera of Carebara, Rhopalomastix and Kartidris in China (Hymenoptera: Formicidae: Myrmicinae). Acta Biol. Plateau Sin. 14: 129-136 (page 130, China species key)