Genus Rhigedanus Emeljanov, 2000

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• Rhigedanus Emeljanov, A.F. 2000. New genera of the family Cixiidae (Homoptera, Fulgoroidea) from Australia and neighbouring Territories. Entomologicheskoe Obozrenie (English translation as Entomological Reviews) 79(1): 12-34 [25].

  Type species:

   Rhigedanus fomibundus Emeljanov, 2000 by original designation.

  Secondary source:

   Emeljanov, A.F. 2000. New genera of the Family Cixiidae (Homoptera, Fulgoroidea) from Australia and neighboring Territories. [translation]. Entomological Review (English translation of Entomologicheskoe Obozrenie) 80(3): 251-270 [264].

Introduction

Two extraordinary dark brown species, both reasonably well represented in collections. Females can be identified only to genus level although Emeljanov (2000) included female paratypes for both species he described.

Distribution

States

Australian Capital Territory, New South Wales, South Australia, Western Australia

IBRA and IMCRA regions

IBRA

ACT, NSW, SA, WA: Coolgardie (COO), Cobar Peneplain (CP), Darling Riverine Plains (DRP), Hampton (HAM), Jarrah Forest (JF), Mulga Lands (ML), Naracoorte Coastal Plain (NCP), NSW South Western Slopes (NSS), Sydney Basin (SB), South Eastern Highlands (SEH), Swan Coastal Plain (SWA)

Diagnosis

Morphology. Body length. ♂ 6.1–7.8 mm, ♀ 7.8–10.4 mm. Head. Vertex distinctly lowered in relation to hind margin of pronotum, not forming a common plane; 1.1–1.5× longer than wide; apex broadly truncate; caudal border shallowly u- or v-shaped; median carina less than 1/2 as long as vertex. Frons with its maximum width around centre of frontoclypeal suture; lateral carinae strongly elevated, subparallel for most of their length, then strongly widening at level of antennae, strongly elevated, lateral margin foliaceous, concealing base of antennae; median carina absent. Postclypeus with well developed lateral carinae and median carina. Thorax. Pronotum long in relation to body length, declivous, carinae strongly elevated medially forming distinct ear-shaped lobes; carinae and lateral parts of hind border of pronotum strongly elevated; hind margin obtusely angled. Mesonotum with three distinct or evanescent longitudinal carinae. Forewing 2.5–3.5× longer than wide; concavity at costal border present; Sc+R+M forming long common stem; r-m1 distad of or at same level as fork MA–MP; position of icu at CuP distad of apex of clavus. Hind tibia with six apical teeth in row interrupted by a wide gap; 1st tarsomere without platellae. Male genitalia. Aedeagus: phallotheca with a straight spine arising left laterally near apex. (Löcker et.al. 2006)

ID Keys

Fletcher, M.J., Löcker, B., Larivière, M.C. and Löcker, H. (2006). Illustrated Key to the Australian Genera of the Planthopper Tribe Gelastocephalini  (Hemiptera: Cixiidae:Fulgoromorpha) http://www1.dpi.nsw.gov.au/keys/fulgor/cixiid/gelastocephalini/gel00.htm

Diagnosis References

Löcker, B., Fletcher, M.J., Larivière, M.-C., Gurr, G.M., Holzinger, W.E. & Löcker, H. 2006. Taxonomic and phylogenetic revision of the Gelastocephalini (Hemiptera: Cixiidae). Invertebrate Systematics 20: 59-160 [79]

General References

Löcker, B., Fletcher, M.J., Larivière, M.-C., Gurr, G.M., Holzinger, W.E. & Löcker, H. 2006. Taxonomic and phylogenetic revision of the Gelastocephalini (Hemiptera: Cixiidae). Invertebrate Systematics 20: 59-160 [79]

History of changes