Abstract
Abstract Twigs are an understudied habitat utilized by many beetle species. Samples of twigs were collected in all six Level III Ecoregions in Louisiana during April and May 2013. The twigs were maintained in emergence chambers from which 942 specimens of adult Coleoptera were obtained, representing 31 families, 111 genera, and 128 species. Beetle richness and composition were not significantly different among ecoregions. Three species collected represent new state records: Pseudochoragus nitens (LeConte) (Anthribidae); Dryotribus mimeticus Horn (Curculionidae); and Narthecius grandiceps LeConte (Laemophloeidae). Four non-native species, all Curculionidae, were collected: Cyrtepistomus castaneus (Roelofs) (Entiminae); Cnestus mutilatus (Blandford) (Scolytinae); Xylosandrus crassiusculus (Motschulsky) (Scolytinae); and Xylosandrus germanus (Blandford) (Scolytinae).
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