Kateretidae & Nitidulidae
The Wisconsin Nitidulidae & Kateretidae Survey:
A comprehensive survey of Wisconsin Nitidulidae and Kateretidae was initiated in 2000 and was part of a Master's project. Throughout Wisconsin sampling sites were selected based on habitat type and sampling history. Flight intercept traps and 12-funnel, baited Lindgren traps were the main methods of trapping. The baits used with the Lindgren funnel traps included brown sugar and yeast solution, whole wheat bread dough, and rotting fruit. Hand collecting proved to be highly complementary in obtaining biological information on fungal, floral, and other associations, such as ant and carrion. Analysis of literature records, museum and private collections, and field research yielded 78 species, 35% of which had not previously been recorded from the state.
Kateretidae or Nitidulidae, What is the difference?
Nitidulidae and Kateretidae represent two closely related, taxonomically and ecologically diverse groups of beetles. Once Kateretidae was considered a subfamily of Nitidulidae, so telling them apart isn't always easy.
Wisconsin adult Kateretidae are most easily distinguished by their typically small body size (1.4-3.1 mm) and feebly capitate antennal club (see image below). Wisconsin Adult Nitidulidae are variable in size (1.5-12.5 mm) and are best distinguished by their distinctly capitate antennal club (see image below).