|Lacayo, Maria - UNIVERSITY OF MINNESOTA|
Submitted to: The Coleopterists Bulletin
Publication Type: Peer Reviewed Journal
Publication Acceptance Date: September 9, 2004
Publication Date: October 8, 2004
Citation: Lacayo, M.L., Konstantinov, A.S. 2004. Morphology of the prothorax and procoxa in the new world Cryptocephalini (Coleoptera: Chrysomelidae: Cryptocephalinae). ZOOTAXA. 676:1-46 Interpretive Summary: Leaf beetles are among the largest and most morphologically diverse groups of plant-eating beetles, containing thousands of species, some of which are important pests of cultivated plants, whereas others are highly beneficial as biological control agents of invasive weeds. This paper describes the structure parts of the thorax and legs, which are widely used as a source of diagnostic characters and for evolutionary reconstructions. This study will be important to taxonomists, morphologists, evolutionary biologists, ecologists, and any others involved in identification of beetles.
Technical Abstract: Comparative morphology of the prothorax and procoxa of New World Cryptocephalini was studied based on representatives of all but two (Mastacanthus Suffrian and Sternoglossus Suffrian) genera. The study revealed a set of characters of obvious diagnostic and possible phylogenetic value, supporting currently accepted generic classification and two subtribes instead of three currently recognized. Two general types of prothoracies were found, the first occurring in Cryptocephalina and Monachulina and the second in Pachybrachina. Previously undescribed for Polyphaga, a monocondylic joint between the coxa and trochantin is found in all studied genera. Possible movements of the trochanter, including one transferring advancing movement into rotation, are described and illustrated.