Genus Eutryonia Goding, 1903

Museums

Regional Maps

• Eutryonia Goding, F.W. 1903. A monograph of the Australian Membracidae. Proceedings of the Linnean Society of New South Wales 28: 2-41 [34].

  Type species:

   Centrotus monstrifer Walker, 1858 by original designation.

 

Introduction

This is currently a monotypic genus containing the only Australian membracid bearing a single vertical pronotal column rather than lateral processes. The shape of the apical expansion of the column is highly variable and the single known species has numerous synonyms as a result. The type species is widespread in eastern Australia from the Australian Capital Territory to North Queensland. The etymology was given by Goding (1903) as "Dedicated to Mr Henry Tryon, the Queensland Government Entomologist, who kindly placed this and other interesting material in my hands for study."

 

Distribution

States

Australian Capital Territory, New South Wales, Queensland

Extra Distribution Information

Australian Endemic.

IBRA and IMCRA regions

IBRA

ACT, NSW, Qld: Brigalow Belt North (BBN), Brigalow Belt South (BBS), Einasleigh Uplands (EIU), NSW North Coast (NNC), South Eastern Highlands (SEH), South Eastern Queensland (SEQ), Wet Tropics (WT)

Diagnosis

Head triangular, recurved, ocelli above a line passing through the centre of eyes, equidistant from each other and the eyes. Prothorax elevated into a convex, dome-shaped form, above which rises a very high, strong, erect process, laterally compressed, dilated at the apex in a very large transverse, cylindrical process which is deeply sulcate in the middle, anterio-posteriorly, and armed on each side with a directly diverging long, very acute spine; at the middle of this process, posteriorly, is a large tuberosity, below which is a large gibbosity; some distance behind the lateral angles the prothorax is suddenly narrowed and produced into a long, slender, sinuous, acuminate process, the apical half distant from the abdomen, the apex reaching tips of tegmina, curving downwards. Tegmina coriaceous, opaque, ferruginous; costa punctured; corium with two discoidal cells, the exterior triangular, the interior oblong, petiolate and about twice larger, destitute of a tranverse venule between two ulnar veins, near base; clavus gradually acuminate, with two veins. Wings vitreous, with four apical cells. Tibiae with the anterior and middle pairs dilated (Goding 1903).

The only Australian membracid genus with a single, vertical, apically enlarged pronotal "horn". Clypeus long. Median pronotal process long. Pronotal notch weakly developed. M and Cu basally fused (Day 1999).

Day (1999) provided a comprehensive redescription of the genus.

 

ID Keys

Fletcher, M.J. and Day M. F. (2005) Illustrated Key to the Genera of the Family Membracidae found in Australia (Hemiptera: Cicadellidae: Membracidae) http://www1.dpi.nsw.gov.au/keys/leafhop/membracid/membrac00.htm [accessed: 8.iv.2012]

 

Diagnosis References

Day, M.F. 1999. The genera of Australian Membracidae (Hemiptera : Auchenorrhyncha). Invertebrate Taxonomy 13: 629-747 [673–675]

Goding, F.W. 1903. A monograph of the Australian Membracidae. Proceedings of the Linnean Society of New South Wales 28: 2-41 [34]

 

History of changes

Published	As part of group	Action Date	Action Type	Compiler(s)
16-May-2012		16-May-2012	MODIFIED
26-Apr-2012		26-Apr-2012	MODIFIED
		12-Feb-2010	(import)