Skiff Beetles

Hydroscaphidae

Classification

Phylum: Arthropoda
Subphylum: Hexapoda
Class: Insecta
Order: Coleoptera
Suborder: Myxophaga
Family: Hydroscaphidae

Pronunciation

How to pronounce Hydroscaphidae: /haɪdrəˈskæfɪdiː/

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Summary

The Hydroscaphidae are a small family of water beetles known as skiff beetles, characterized by their small size, aquatic habits, and diet primarily consisting of algae. They have a broad distribution and are known for their resilience in various aquatic environments.

Physical Characteristics

Small size, most under 2 mm in length; color ranges from tan to brown; abbreviated elytra exposing several tapering tergites of the abdomen; wings fringed with long setae.

Identification Tips

Look for the notopleural suture and their superficial resemblance to tachyporine staphylinids; males have segment VI with two widely separated, acute teeth along the posterior margin.

Habitat

Live on mats of algae with a thin layer of running water, such as accumulated algae lining the edges of streams.

Distribution

Found in the Americas, Eurasia, northern Africa, and Madagascar; observed in the western United States from northern Idaho to Arizona and California.

Diet

Primarily feed on algae.

Reproduction

In at least one species, the female lays a single large egg on the algal mat.

Ecosystem Role

Part of the aquatic ecosystem, contributing to the breakdown of algae.