Ephemerelloidea
Family Guides
3- Ephemerellidae(Spiny Crawler Mayflies)
- Leptohyphidae
- Neoephemeridae(large squaregill mayflies)
is a superfamily of mayflies in the suborder Pannota, characterized by worldwide distribution and basal phylogenetic position within the order. The superfamily contains three recognized : Ephemerellidae, Leptohyphidae, and . Nymphs are distinguished from the related superfamily Caenoidea by possessing non-filamentous gills.
Pronunciation
How to pronounce Ephemerelloidea: /ɛˌfɛmɛrɛlˈɔɪdiə/
These audio files are automatically generated. While they are not always 100% accurate, they are a good starting point.
Identification
Nymphs can be distinguished from Caenoidea by non-filamentous gill structure. Members of constituent show morphological variation: Ephemerellidae nymphs often possess operculate or plate-like gills; Leptohyphidae and exhibit family-specific gill and body form characteristics. identification requires examination of wing venation, genitalia, and other standard characters.
Images
Habitat
Freshwater lotic environments, primarily streams and rivers. Within these systems, partition microhabitats by substrate type and current velocity. Specific examples include: faster currents on larger substrates; moderate currents on mixed substrates; slower currents on smaller substrates. Elevation range includes lowland to Himalayan foothills (430 m a.s.l. documented).
Distribution
Worldwide distribution. Documented occurrences include: North America ( of Ephemerella, Serratella); India (Uttarakhand Himalayan region, Tamil Nadu Western Ghats); and other regions within the Indomalayan realm. The Dudgeodes is restricted to the Indomalayan realm.
Life Cycle
Hemimetabolous development with aquatic nymphal and terrestrial winged stages (subimago, ). Nymphal stage is the primary feeding and growth phase. Winged stages have been reared from collected nymphs in laboratory grow nets. stage has been described for some .
Behavior
Nymphs exhibit partitioning , segregating by substrate size and current velocity to reduce . This differential microhabitat selection enables coexistence of congeneric and confamilial in sympatry. Collection methods include hand picking and kick-net sampling of nymphs from substrates.
Similar Taxa
More Details
Family composition
Three are currently recognized within : Ephemerellidae (spiny crawler mayflies), Leptohyphidae, and . A fourth family, , has been proposed and is under taxonomic consideration, with recent descriptions of new from India.
Molecular studies
Partial COI sequences have been used as an initial clustering method to demonstrate relationships among operational taxonomic units within constituent .