Ameletidae

combmouthed minnow mayflies

Genus Guides

Ameletus(Upland Summer Mayfly (A. inopinatus))

is a of mayflies commonly known as combmouthed minnow mayflies. The family includes the speciose Ameletus, which reaches its greatest diversity in southwestern North America with up to 12 co-occurring at single sites. The genus Metreletus has a trans-Palaearctic distribution with three recognized species. Ameletidae larvae are aquatic and occur in lotic from small headwater streams to larger rivers.

Ameletus lineatus by no rights reserved, uploaded by nmacelko2. Used under a CC0 license.

Ameletus ludens by (c) Christine Young, some rights reserved (CC BY), uploaded by Christine Young. Used under a CC-BY license.

Pronunciation

How to pronounce Ameletidae: /ˌæmɛˈlɛtɪdiː/

These audio files are automatically generated. While they are not always 100% accurate, they are a good starting point.

Identification

Male imagines distinguished by lobe shape. Larvae identified by gill : size of gill I and form of gills II–VII. Separate identification keys exist for western and eastern Nearctic of Ameletus.

Images

Habitat

Lotic freshwater including small headwater spring brooks to larger rivers. Found in virtually all watersheds in regions where they occur. Metreletus omelkoi has been documented in temporary streams.

Distribution

Nearctic: western and eastern North America, with highest in southwestern Alberta. Palearctic: trans-Palaearctic distribution including West-European mountains, Far Eastern Russia (Amur basin, Primorskii Krai), and Greece (Thrace).

Life Cycle

Hemimetabolous with distinct larval, subimago, and stages. have been described for some . Specific duration varies by species and environmental conditions.

More Details

Taxonomic Notes

The includes approximately 30 bisexual of Ameletus in North America. Recent revisions have synonymized several previously recognized species: A. aequivocus with A. sparsatus; A. alticolus and A. celeroides with A. celer; A. connectina and A. connectus with A. velox; A. facilis with A. vancouverensis; A. monta with A. similior; A. querulus with A. shepherdi. The Metreletus contains three species: M. balcanicus (West-European mountains), M. micus (Far East), and M. omelkoi (Far Eastern Russia).

Research Gaps

details including specific diet, growth rates, and complete developmental timelines remain poorly documented for most . The abstract-only sources for several papers indicate limited accessible ecological information.