Genus Alosextius Evans, 1966

Museums

Regional Maps

• Alosextius Evans, J.W. 1966. The leafhoppers and froghoppers of Australia and New Zealand. Memoirs of the Australian Museum 12: 1-347 [299].

  Type species:

   Acanthucus carinatus Funkhouser, 1927 by original designation.

 

Introduction

This genus is currently monotypic but Day (1999) recognised three undescribed species in North Queensland. The species are pale greenish (pale yellow brown in dry specimens), which is similar to the coloration of species of Sextius Stål but they lack the reticulate venation typical of Sextius. The pronotal notch is also much more obvious in Alosextius than in Sextius and crossvein m-cu1 is absent in Alosextius.

 

Distribution

States

New South Wales, Queensland, South Australia

Extra Distribution Information

Australian Endemic.

IBRA and IMCRA regions

IBRA

NSW, Qld, SA: Brigalow Belt South (BBS), Cape York Peninsula (CYP), Gulf Plains (GUP), South Eastern Queensland (SEQ), Wet Tropics (WT)

Diagnosis

Pale greenish brown, sexually dimorphic insects. The pronotum, which is coarsely punctate, has a sharp median carina which extends horizontally onto the foliaceous, straight, median pronotal process. The lateral pronotal processes are tricarinate and have well-defined marginal rims. In the ♂, in which these processes are horizontal and broadly triangular and extend laterally only slightly beyond the humeral angles, they lie at a lower level than the median carina. In the ♀, the lateral pronotal processes are anteriorly, and dorsally, produced and apically recurved and acute. The median pronotal process extends almost as far as the apices of the folded tegmina. In the tegmina M and Cu1 are basally fused, crossvein m-cu2 is lacking and crossvein m is in continuous alignment with R + M1+2 (Evans 1966).

 

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: 4.iv.2012]

 

Diagnosis References

Evans, J.W. 1966. The leafhoppers and froghoppers of Australia and New Zealand. Memoirs of the Australian Museum 12: 1-347 [299]

 

General References

Day, M.F. 1999. The genera of Australian Membracidae (Hemiptera : Auchenorrhyncha). Invertebrate Taxonomy 13: 629-747 [650–652]

 

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)