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Classification |
.......Arctodium
planum (Blanchard, 1850)
.......Syn. Cratoscelis plana Blanchard, 1850
.......Syn. Cratoscelis canicapilla Philippi & Philippi,
1864
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Distribution of Arctodium
planum. |
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Description. Arctodium planum is characterized
by its long, dense, pale yellow setae covering all parts of the body.
While some specimens of A. vulpinum may also have pale colored
setae on some parts of the body, the setae are not usually as long,
dense, or pale yellow. Setae of A. vulpinum are typically
more golden brown. Other species of Arctodium do not have
pale setae. In particular, Arctodium planum is the only species
that has pale colored setae on the apices of the segments of the maxillary
and labial palps and a fringe of pale yellow setae along the eye canthus.
All other species of Lichniini have dark colored (brown, gray, or black)
setae on the mouthparts and eye canthus. Arctodium planum males
are also characterized by the metatibial apex, which is modified into
a spine that is slender and attenuate and is longer than the adjacent
spurs. Males of A. vulpinum and A. discolor also
have a long spine that is longer than the adjacent spurs, but the shape
is different. The metatibial spine of males of A. vulpinum and A.
discolor is much broader and oblique towards the apex. Males of A.
mahdii have a metatibial spine that is shorter than the adjacent
spur.
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Distribution. Central
Chile in Region V (Valparaíso), Region VI (O’Higgins),
and Region Metropolitana de Santiago.
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Phenology. September through January.
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References:
Hawkins, S. J. 2006. Revision of the Chilean tribe Lichniini Burmeister,
1844 (Coleoptera: Scarabaeidae: Melolonthinae). Zootaxa 1266: 1-63.
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Author: Shauna
Joy Hawkins
Generated on: 26/APR/2007.....
Last modified: 26/APR/2007
University of Nebraska State Museum - Division of Entomology
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