Syncarida

Syncarida is a superorder of crustaceans, comprising the two extant orders Anaspidacea and Bathynellacea, and the extinct order Palaeocaridacea.

Bathynellacea is an order of crustaceans which live interstitially in groundwater. Some species can tolerate low salt concentrations, and at least one African species is a thermophile, living in hot springs and tolerating temperatures up to . Bathynellaceans are minute, blind, worm-like animals with short, weak legs, reaching a maximum size of . They are found on every continent except Antarctica, although they are missing from some islands, including Fiji, New Caledonia and the Caribbean islands. There are two families, Bathynellidae and Parabathynellidae; a third family, "Leptobathynellidae"

Anaspidacea is an order of crustaceans, comprising eleven genera in four families. Species in the family Anaspidesidae vary from being strict stygobionts (only living underground) to species living in lakes, streams and moorland pools, and are found only in Tasmania. Koonungidae is found in Tasmania and the south-eastern part of the Australian mainland, where they live in the burrows made by crayfish and in caves. The families Psammaspididae and Stygocarididae are both restricted to caves, but Stygocarididae has a much wider distribution than the other families, with Parastygocaris having spec

Bathynellidae is a family of crustaceans belonging to the order Bathynellacea, first described by Karl Grobben in 1905.

Parabathynellidae is a family of crustaceans belonging to the order Bathynellacea. These creatures are characterized by their slender bodies, reduced eyes, and elongated antennae. They are typically less than 1 mm in length, making them difficult to observe without the aid of a microscope. Parabathynellidae are found in freshwater habitats around the world, including streams, springs, caves, and aquifers.

Stygocarididae is a family of crustaceans belonging to the order Anaspidacea.

Koonungidae is a family of crustaceans belonging to the order Anaspidacea.

species of crustacean

Psammaspididae is a family of crustaceans belonging to the order Anaspidacea.

species of crustacean endemic to Tasmania