Ephemerelloidea

Pronunciation

How to pronounce Ephemerelloidea: /ɛˌfɛmɛrɛlˈɔɪdiə/

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Summary

Ephemerelloidea is a superfamily of mayflies characterized by nymphs with non-filamentous gills and a worldwide distribution. It comprises several families, including Ephemerellidae, Leptohyphidae, and Tricorythidae.

Physical Characteristics

Members of the Ephemerelloidea superfamily can be distinguished from those in Caenoidea by their nymphs having non-filamentous gills.

Identification Tips

Key identification feature includes the structure of the nymph gills, which are not filamentous.

Habitat

Ephemerelloidea nymphs are typically found in aquatic environments such as rivers and streams.

Distribution

Ephemerelloidea has a worldwide distribution, found on every continent except Antarctica.

Diet

Nymphs feed on organic detritus and periphyton, while adults typically do not feed.

Life Cycle

Ephemerelloidea undergoes a complete metamorphosis with distinct nymph, subimago, and imago stages.

Reproduction

Reproduction occurs through aquatic mating, with females laying eggs on the water surface.

Predators

Nymphs are preyed upon by various fish and macroinvertebrates, while adults may fall prey to birds and spiders.

Ecosystem Role

Ephemerelloidea play a crucial role in aquatic ecosystems as both prey for higher trophic levels and as grazers on organic material.

Evolution

Ephemerelloidea is considered a basal group among mayflies, suggesting it diverged early in the evolution of this group.

Similar Taxa

• Caenoidea
• Ephemerellidae
• Leptohyphidae
• Tricorythidae

Misconceptions

There may be confusion with other mayfly superfamilies due to the similarities in morphology of adult forms.

Tags

• mayflies
• Ephemerelloidea
• Pannota
• insects
• aquatic ecology