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 Key to Aridaeus Thomson, 1860
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Francesco
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Posted - 22/10/2013 :  19:11:10  Show Profile  Email Poster  Visit Francesco's Homepage  Reply with Quote
Generality

Aridaeus Thomson, 1860 is an Australian genus belonging to the tribe Heteropsini.

The sexes are easily distinguishable from the antennal length:


male and female of A. thoracicus

The known larvae (of A. thoracicus) bore the mangrove Avicennia marina ssp. australasica (Walp.) J. Everett but they were also recorded as a pest for the Crab Apple Malus sylvestris Mill.

Adults are diurnal and can be found on blossom plants.
Here a male of A. thoracicus taken from Wikipedia:


Australia, Paruna Reserve, Como
Photo John Tann, CC-BY Creative Commons Attribution License 3.0

Francesco
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Luxembourg
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Posted - 22/10/2013 :  19:14:34  Show Profile  Email Poster  Visit Francesco's Homepage  Reply with Quote
Key to the species

1. Antennae without apical spines (Southwestern Australia) .................................. heros Pascoe, 1866
-. Antennomeres III-V with apical spines..................................................................................... 2
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Francesco
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Luxembourg
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Posted - 22/10/2013 :  19:17:30  Show Profile  Email Poster  Visit Francesco's Homepage  Reply with Quote
2. Elytra obliquely truncate at apex; Indonesian species ....................................................... 3
-. Elytra transversely truncate at apex; Australian species .................................................... 4
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Francesco
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Luxembourg
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Posted - 22/10/2013 :  19:20:01  Show Profile  Email Poster  Visit Francesco's Homepage  Reply with Quote
3. Legs and antennae black (Timor I.) ............................................................... timorensis Jordan, 1894


Karl Jordan's drawing; Picture of the Holotype here

-. Legs and antennae orange (Sumba I.) ............................................................ sumbaensis Chemin & Vitali, 2013


Photo Gérard Chemin, Holotype
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Francesco
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Luxembourg
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Posted - 22/10/2013 :  19:24:10  Show Profile  Email Poster  Visit Francesco's Homepage  Reply with Quote
4. Apical half of elytra yellow, apex more or less darkened (widespread in Australia, introduced in New Zealand) ........................................................................................................... thoracicus (Donovan, 1805)



-. Apical half of elytra black (Australia: Queensland) ............................................... nigripes Aurivillius, 1917
= princeps Carter, 1934
Variable species, other picture here


Photo Gérard Chemin
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