Fishflies comprise ecologically and taxonomically diverse genera and species. In Florida they are represented by 2 eastern Nearctic genera: Chauliodes (2 spp.) and Nigronia (2 spp.). Chauliodes species inhabit still-water habitats while Nigronia species live in streams and small rivers.
Species:
Chauliodes pectinicornis, larva [from Rasmussen & Pescador (2002)]
Chauliodes pectinicornis (L.) is found throughout the central and eastern USA and in parts of southern Canada. In Florida this species is widespread across the panhandle and much of peninsular Florida, but is less common than C. rastricornis. Larvae live in a variety of still-water habitats such as woodland swamps and ponds, occurring most abundantly in waters having deep layers of debris and decaying logs. Adults are present primarily during the Spring and Summer.
Chauliodes rastricornis Rambur has a geographic range very similar to C. pectinicornis. Distributions of the 2 species in Florida is also quite similar and populations of the 2 species are sometimes sympatric. Adults of this commonly collected species occur nearly year-round.
Nigronia fasciatus (Walker) ranges over much of the eastern USA. In Florida, however, it appears to be restricted toApalachicola Bluffs and Ravines Region in the northern panhandle. Larvae live in small, cool, headwater streams within deciduous forests. Adults are present during April and May.
Nigronia serricornis, larva [from Rasmussen & Pescador (2002)]
Nigronia serricornis (Say) occurs throughout the eastern USA and extends its range into parts of southern Canada. In Florida it is widespread throughout the western and central panhandle, and within this area the larvae live in many unpolluted streams and small rivers. Adults appear in April and May.
page content updated 24 October 2003