Genus - Dicerca

Taxonomic Hierarchy for University of Alberta E.H. Strickland Entomological Museum


Results

4 results for "Dicerca"

Dicerca caudata

University of Alberta E.H. Strickland Entomological Museum

SeasonalityJuly. IdentificationThe shape of the pronotum is diagnostic for separating D. divaricata and caudata. The pronotum of adult caudata is widest towards the base, where as for divaricata the pronotum is widest at the middle. Elytral striae tend to be faintly impressed.

Dicerca callosa callosa

University of Alberta E.H. Strickland Entomological Museum

SeasonalityJuly. IdentificationSecond and third segments of the antennae are about the same size. The mesotibia of male is simple, or has a slight dilation. Elytra striate, becoming obliterated in the broadly punctured areas. The general body outline, is similar in appearance to beetles of Poecilonota cyanipes. There are two subspecies of D. callosa recognized by Bright (1987). No, good structural features for separating the subspecies were given except for relative size and geography. Bright reported both subspecies from Alberta. In my examination of the material, I recognize one subspecies, Dicerca callosa callosa Casey.

Dicerca tenebrica

University of Alberta E.H. Strickland Entomological Museum

SeasonalityJuly. IdentificationThis is perhaps the most frequently encountered species of Dicerca encountered in the aspen forests. Beetles are black, sometimes with a bluish tint. Elytral striae are complete to the apex, but sometimes weakly impressed. The mesotibia of the male has a distinct tooth. A similar species, D. hesperoborealis, may be separated, by examining the median carina (ridge) on the plate just before the hind coxa. The ridge lacks or has a very weak groove on one end. On beetles of D. hesperoborealis there is a distinct groove.

Dicerca tenebrosa

University of Alberta E.H. Strickland Entomological Museum

SeasonalityJune and July. IdentificationDicerca tenebrosa is easily confused with other Dicerca species. The character combination of a short second segment on the antennae and the large tooth on the male's mesotibia is diagnostic. The head has an irregular raised area on the top, between the eyes. The rough sculpture of the elytra and pronotum is similar to beetles of D. crassicollis.

Taxonomic Hierarchy for University of Alberta E.H. Strickland Entomological Museum