Ameletopsidae

Definition

A family of mayflies (order Ephemeroptera) within the superfamily Baetoidea. Members of this family are among the more primitive living mayflies, sharing characteristics with other baetoid families such as reduced wing venation and simplified mouthparts in adults. The family is distinguished by specific combinations of gill morphology and genital structure used in identification.

Etymology

Example

Ameletopsidae species are collected alongside Baetidae and Siphlonuridae in cold, fast-flowing streams of the Southern Hemisphere, where their nymphs cling to submerged stones and feed on periphyton.

Related Terms

• Baetoidea
• Ephemeroptera
• Baetidae
• Siphlonuridae
• Mayfly
• wing venation
• gill morphology

Usage Notes

Use Ameletopsidae when referring to the family rank; the group is sometimes overlooked in regional surveys due to its restricted distribution compared to the more diverse Baetidae. Nymphs require microscopic examination of gill structure and labial palps for reliable family-level identification.