Onomarchus (insect)

Onomarchus[1] is a genus of bush crickets or katydids found mainly distributed in the tropical forests of Asia. Like many other members of the subfamily Pseudophyllinae, their wings appear very leaf-like.

Detail of wing of O. uninotatus

Onomarchus
Onomarchus uninotatus from the Western Ghats of India
Scientific classification
Kingdom: Animalia
Phylum: Arthropoda
Class: Insecta
Order: Orthoptera
Suborder: Ensifera
Family: Tettigoniidae
Subfamily: Pseudophyllinae
Tribe: Pseudophyllini
Genus: Onomarchus
Stål, 1874
Synonyms
  • Astralia Kirby, 1906
  • Onomarchis Hebard, 1922
  • Onomarcus Pictet & Saussure, 1892

A study of O. uninotatus found it to produce sounds at an unusually low frequency of about 3.5 kHz. The tympanal membrane cuts out high frequencies unlike the sound filters found in other Tettigoniids.[2]

Species

The species in the genus include

  • Onomarchus bisulcatus Ingrisch & Shishodia, 1998[3]
  • Onomarchus cretaceus (Serville, 1838)
  • Onomarchus leuconotus (Serville, 1838) - type species (locality Java)
  • Onomarchus philippinensis Weidner, 1965
  • Onomarchus uninotatus (Serville, 1838)[4]

References
  1. Stål C (1874) Recensio Orthopterorum. Revue critique des Orthoptères décrits par Linné, De Geer et Thunberg 2 Locustina: 51, 68.
  2. Rajaraman, K.; Mhatre, N.; Jain, M.; Postles, M.; Balakrishnan, R.; Robert, D. (2012). "Low-pass filters and differential tympanal tuning in a paleotropical bushcricket with an unusually low frequency call". Journal of Experimental Biology. 216 (5): 777–787. doi:10.1242/jeb.078352. PMID 23125342.
  3. Ingrisch, S. & MS Shishodia (1998). "New species and records of Tettigoniidae from India (Ensifera)" (PDF). Bulletin de la Société Entomologique Suisse. 71: 355–371.
  4. DeJong, C. (1946). "A new variety of Onomarchus from British India (Orthoptera, Tettigoniidae)". Zoologische Mededelingen. 26: 268-27O.
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