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Francesco
Forum Admin
Luxembourg
9454 Posts |
 Posted - 22/10/2013 : 19:11:10
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Generality
Aridaeus Thomson, 1860 is an Australian genus belonging to the tribe Dychophyiini.
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 |
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Francesco
Forum Admin
Luxembourg
9454 Posts |
Posted - 22/10/2013 : 19:14:34
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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
Forum Admin
Luxembourg
9454 Posts |
Posted - 22/10/2013 : 19:17:30
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2. Elytra obliquely truncate at apex; Indonesian species ....................................................... 3
-. Elytra transversely truncate at apex; Australian species .................................................... 4 |
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Francesco
Forum Admin
Luxembourg
9454 Posts |
Posted - 22/10/2013 : 19:20:01
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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
Forum Admin
Luxembourg
9454 Posts |
Posted - 22/10/2013 : 19:24:10
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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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Key to Aridaeus Thomson, 1860
