Ravavy

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Ravavy
Ravavy miafina
Scientific classification
Kingdom: Animalia
Phylum: Arthropoda
Class: Insecta
Order: Hymenoptera
Family: Formicidae
Subfamily: Dolichoderinae
Tribe: Bothriomyrmecini
Genus: Ravavy
Fisher, 2009
Type species
Ravavy miafina
Diversity
1 species
(Species Checklist)

Ravavy miafina casent0115570 profile 1.jpg

Ravavy miafina

Ravavy miafina casent0115570 dorsal 1.jpg

Specimen Label

Evolutionary Relationships
Dolichoderinae

Tapinomini
  (6 genera)




Bothriomyrmecini


Loweriella
  (1 species)



Ravavy
  (1 species)





Arnoldius
  (4 species)





Bothriomyrmex
  (29 species)



Chronoxenus
  (9 species)









Dolichoderini
  (1 genus)



Leptomyrmecini
  (16 genera)





Based on Ward et al. 2010.

The only species in its genus, Ravavy miafina is only known from males. These have been collected in Malaise traps sampled from January through August in various locations across western Madagascar.

Identification

Ravavy is distinguished from all other described males in the dolichoderine genera by its unique mandibular shape. The elongate basal margin and reduced masticatory margin is considered apomorphic for the genus. The shape of the clypeus, length of scape and form of petiole, together form an inclusive diagnosis that isolates Ravavy from all other genera in the subfamily. No other described male is even superficially similar to Ravavy. The shape of the mandible in Bothriomyrmex Emery (see images on AntWeb CASENT0103279), however, is reminiscent in some respects. The mandible in Bothriomyrmex is not triangular as in Tapinoma for example, but like Ravavy, has a short masticatory margin compared to the basal margin. In Bothriomyrmex, however, the masticatory margin includes at least three teeth, while in Ravavy a single tooth is present. (Fisher 2009)  

Distribution

Distribution and Richness based on AntMaps

Biology

Castes

Known only from the male caste.

Nomenclature

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

  • RAVAVY [Dolichoderinae: Bothriomyrmecini]
    • Ravavy Fisher, 2009: 46. Type-species: Ravavy miafina, by original designation.

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

Description

Male

Based on specimens of Ravavy miafina. Head longer than wide. Ventral margin of eye more or less flat. Antennae with 13 articles. Scape length twice that of flagellar segment 1. Scape not reaching posterior margin of head. Pedicel conical. First flagellar segment cylindrical, straight. Flagellar segments 1 and 2 three times as long as broad. Anteromedian clypeal margin entire, without central concavity. Posterior clypeal margin straight, not projecting between antennal socket cavities. Palpal formula 6:3 (confirmed with dissection). Mandible with single narrow apical tooth, located at tip of mandible; without series of serrate denticles or teeth along margin. Masticatory margin meeting basal margin in abrupt angle. Basal margin elongate, greater than twice length of masticatory margin. Propodeal angle indistinct; declivitous and dorsal faces of propodeum convex. In profile, petiole with distinct node; anterior and posterior margin subequal in height, dorsum evenly convex. Attachment to gaster broad. First gastral segment in dorsal view without grove for the reception of the entire height of the petiole.

References