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Francesco
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Luxembourg
9402 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:
![](/public/imgforum/Francesco/2013102613337_aridaeusthoracicus.jpg) ![](/public/imgforum/Francesco/201310261320_aridaeus70743621_1.jpeg) 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:
![](/public/imgforum/Francesco/2013102511108_183726.jpg) Australia, Paruna Reserve, Como Photo John Tann, CC-BY Creative Commons Attribution License 3.0 |
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Francesco
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Luxembourg
9402 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
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Luxembourg
9402 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
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Luxembourg
9402 Posts |
Posted - 22/10/2013 : 19:20:01
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3. Legs and antennae black (Timor I.) ............................................................... timorensis Jordan, 1894
![](../public/imgforum/Francesco/20131022195853_196774.jpg) Karl Jordan's drawing; Picture of the Holotype here
-. Legs and antennae orange (Sumba I.) ............................................................ sumbaensis Chemin & Vitali, 2013
![](../public/imgforum/Francesco/20131022192811_Pho1027.jpg) Photo Gérard Chemin, Holotype |
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Francesco
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Luxembourg
9402 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)
![](../public/imgforum/Francesco/20131022201219_aridaeusthoracicus.jpg)
-. Apical half of elytra black (Australia: Queensland) ............................................... nigripes Aurivillius, 1917 = princeps Carter, 1934 Variable species, other picture here
![](../public/imgforum/Francesco/20131022193056_201312117146_Aridaeus.jpg) Photo Gérard Chemin |
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