Rioxa

Rioxa is a genus of tephritid (fruit flies) in the family Tephritidae.[1] The genera Rioxa and related Hexacinia and Cribrorioxa are distributed in South and Southeast Asia from India and Sri Lanka in the west to the Philippines. Only a few species extend east of Borneo to New Guinea and the Bismarck Archipelago. Rioxa breeds on fallen logs inside forests.[2]

Rioxa
Male Rioxa sexmaculata from India showing odour glands everted.
Scientific classification
Kingdom:
Animalia
Phylum:
Arthropoda
Class:
Insecta
Order:
Diptera
Section:
Schizophora
Subsection:
Acalyptratae
Superfamily:
Tephritoidea
Family:
Tephritidae
Subfamily:
Phytalmiinae
Tribe:
Acanthonevrini
Genus:
Rioxa

Walker, 1856

Male Rioxa sexmaculata display on suitable fallen logs with bark beetle holes by inflating pleural vesicles at the base of abdominal segment 5 and raising their abdomen and walk in circle around a spot. They are thought to exude pheromones which attract females. After copulation the male guards the female which lays its eggs in the holes made by bark beetles.[3]

Species
  • Rioxa discalis (Walker, 1861)
  • Rioxa erebus Rondani, 1875
  • Rioxa lanceolata Walker, 1856
  • Rioxa lucifer Hering, 1941
  • Rioxa manto (Osten Sacken, 1882)
  • Rioxa megispilota Hardy, 1970
  • Rioxa sexmaculata (Wulp, 1880)
  • Rioxa vinnula Hardy, 1973

References
  1. http://nomen.at/Rioxa
  2. Hancock, David L. (2014). "An annotated key to the 'Rioxa' complex of genera (Diptera: Tephritidae: Acanthonevrini)". Australian Entomologist. 41 (1): 45–54.
  3. Kovac, D.; Dohm, P.; Freidberg, A. (2010). "Field observations on the mating behaviour of the Oriental Rioxa sexmaculata(van der Wulp)(Diptera: Tephritidae) and a review of the reproductive behaviour patterns in Acanthonevrini". Biosystematica. 4 (1): 5–14.


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