Prolegs
Guides
Dolerus aprilis
Dolerus aprilis is a sawfly species in the family Tenthredinidae. Larvae of this genus are known to possess six or more pairs of prolegs, distinguishing them from lepidopteran caterpillars which have five or fewer. The species was described by Norton in 1861 and occurs in several Canadian provinces.
Eriocampa
woolly sawflies
Eriocampa is a small Holarctic genus of sawflies in the family Tenthredinidae comprising approximately five to ten described extant species. The genus is characterized by larvae that produce conspicuous white waxy secretions, giving them a woolly appearance that likely serves as a defense against predators and parasitoids. Several species are economically significant as defoliators of woody plants, including Eriocampa juglandis (butternut woollyworm) on walnut and hickory, and Eriocampa ovata (woolly alder sawfly) on alder. The genus has a debated taxonomic history, with various classifications placing it in different subfamilies within Tenthredinidae.
Rivulinae
Rivulinae is a subfamily of moths in the family Erebidae, established by Augustus Radcliffe Grote in 1895. The subfamily is characterized by distinctive larval and adult morphological features: caterpillars possess long, barbed hairs and retain full prolegs on abdominal segments 3 through 6, while adults exhibit a unique microsculpturing proboscis. Taxonomic placement has been revised; Rivulinae was formerly classified within Hypeninae or Noctuidae but is now retained in Erebidae based on phylogenetic studies. The subfamily includes approximately 8 recognized genera, with members distributed across multiple continents.