Family Delphacidae Leech, 1815

Subfamily Asiracinae Fieber, 1872

Tribe Idiosystanini Emeljanov, 1996

Genus Idiosystatus Berg, 1883: 231

Distribution: Temperate South America.

 

Type species (in original combination): Delphax acutiusculus Spinola, 1852.

 

Recognized species

There are five recognized species currently placed in this genus.

 

Idiosystatus  acutiusculus (Spinola, 1852: 258) - Argentina, Chile

Idiosystatus  australis Fennah, 1969: 52 - Argentina
Idiosystatus  fuscoirroratus (Spinola, 1852: 260) - Chile

   = Delphax fuscoirrorata Spinola, 1852: 260.

   = Delphax vittata Spinola, 1852: 260; syn. by Fennah 1969: 50.

   = Liburnia fuscoirrorata (Spinola, 1852); comb. by Berg 1881: 266.

   = Megamelus fuscoirroratus (Spinola, 1852); comb. by Crawford 1914: 682.

   = Delphacodes fuscoirrorata (Spinola, 1852); comb. by Muir 1926: 38.

   = Idiosystatus  fuscoirroratus (Spinola, 1852); comb. by Fennah 1950: 250.

 Idiosystatus  gubernator Fennah, 1969: 48 - Argentina
Idiosystatus  longifrons Fennah, 1969: 51- Chile

 

Reported Hosts: Apparently none.

 

Economic Importance: Limited. 

 

Recognition

This genus revised by Fennah (1969).  Species can be common and I have examined good series from sweep and vacuum samples from Argentina and Chile.

Somewhat flattened with paired carinae on the frons and 5 carinae on the mesonotum.  Most similar to Pentagramma, but that genus tends to be green (not earth toned). 

 

Idiosystatus  acutiusculus (Photos by Kimberley Shropshire, Department of Entomology, University of Delaware)

Idiosystatus acutiusculus (Spinola) from Fennah 1969

Idiosystatus  australis Fennah, 1969 from Fennah 1969

Idiosystatus gubernator Fennah from Fennah 1969

Idiosystatus longifrons from Fennah 1969

Molecular resources: None

 

Selected references

Berg, C. 1881b. Sinonimia y descripcion de algunos Hemípteros de Chile, del Brasil y de Bolivia. Anales de la Sociedad Científica Argentina 12: 259-272.

Berg, C. 1883b. Addenda et Emendanda ad Hemiptera Argentina (Continuatio.) Anales de la Sociedad Cientifica Argentina 16: 231-241.

Fennah, R. G. 1965. Fulgoroidea from Southern Chile (Hemiptera). Bulletin of the British Museum (Natural History) Entomology 17: 233-272.

Fennah, R. G. 1969. A revision of the Idiosystatus Berg (Homoptera: Fulgoroidea, Delphacid). Proceedings of the Royal Entomological Society of London 38(3-4): 47-52.

Spinola, M. 1852a. Tribu IV.-Hipocefalocera. Gay's Historia fisica y politica de Chile. Paris. 7:238-305, plate 3. (whole volume, courtesy Memoria Chilena).