Provides photos, classification and specimens.

Provides taxonomy guide.

Article by Randall DJ et. al.

Contains data on distinguishing features of this species.

Article by Brent Courchene. With photos.

Article by Ronnie Garrison. With links to related sites.

Contains data distinguishing features of this species.

Discusses characteristics and distribution. With photos.

Provides profile and photos of member species. Subscription required.

Discusses relic profile. With photos.

Summary includes order, class, number of genera and species, environment, etymology, reproductive guild, and remarks.

Discusses identification, reproduction, food, habitat and range, population and management, and fun facts. With photos and links to related sites.

Contains classification guide.

Presents description, life history and distribution.