|
|
|
How to identify a Christmas Beetle
Is the specimen a Christmas Beetle?
The Christmas beetles belong to the family Scarabaeidae, subfamily Rutelinae, genus Anoplognathus. To identify the genus Anoplognathus work through the following four steps:
Step 1. Is the specimen a beetle, Order Coleoptera?
To determine if the specimen is a beetle, go to the "Key to Insect Orders" located at the LucIDcentral website. If it is a beetle, check whether it belongs to the family Scarabaeidae.
Step 2. Identification of the family Scarabaeidae. The family Scarabaeidae is large, consisting of around 2300 genera and over 27000 species worldwide (Cassis & Weir 1992). The Australian Scarabaeidae possess the following characteristics (modified from Lawrence & Britton 1994)
Step 3. Identification of subfamily Rutelinae The subfamily Rutelinae includes about 200 genera and 3800 species worldwide, of which 23 genera and approximately 109 species occur in Australia (Cassis & Weir 1992). Adult Rutelinae can be distinguished by a combination of the following characteristics (Figure 3[i])
Step 4. Identification of the genus Anoplognathus (Christmas Beetles). Christmas beetles belong to the genus Anoplognathus Leach. Anoplognathus is endemic to Australia, except one species shared with New Guinea. There are 36 species, 21 of which occur in New South Wales (Cassis & Weir, 1992). Adult beetles feed on leaves, usually of eucalypts, and larvae feed on roots, usually of grasses. Several species are economically important pests in eucalypt plantations. Anoplognathus can be separated from other genera of Rutelinae, in New South Wales, by the following characteristics (adapted from Carne, 1957,1958)
|
|