Jurassic crustaceans

Eryon is an extinct genus of decapod crustaceans from the Late Jurassic of Germany. Its remains are known from the Solnhofen limestone. It reached a length of around , and may have fed on particulate matter on the sea bed. It went extinct sometime after the Late Jurassic, which ended approximately 145 million years ago (Ma). There is no specific date for the extinction of the Eryon genus itself mentioned in the records, only that its existence is confined to the fossil records of the Late Jurassic period.

Aeger is a genus of fossil prawns. They first occur in the Early Triassic (Paris biota), and died out at the end of the Late Cretaceous. A total of 21 species are known, which makes this the most diverse genus in the family Aegeridae.

Dollocaris is an extinct genus of thylacocephalan that lived during the Jurassic period. Fossils have been found in France, specifically the La Voulte-sur-Rhône lagerstätte. It is known for its massive compound eyes, giving Dollocaris a rather characteristic appearance. One species is currently known, D. ingens.

Kazacharthra is an extinct order of branchiopod crustaceans that appear to be closely related to the living order Notostraca (the tadpole shrimp). Kazacharthrans lived in marshes and ponds in the Upper Triassic of Western China and Mongolia, and in Lower Jurassic Kazakhstan (where their fossils were first found, hence the name). It is presumed that the kazacharthrids lived much like their living relatives, in that they were opportunistic omnivores that fed on any available food source, from bacterial biofilms to detritus to smaller animals that could be overpowered (i.e., fairy shrimp, small o

Pseudastacus (meaning 'false Astacus, in comparison to the extant crayfish genus) is an extinct genus of decapod crustaceans that lived during the Jurassic period in Europe, and possibly the Cretaceous period in Lebanon. Many species have been assigned to it, though the placement of some species remains uncertain and others have been reassigned to different genera. Fossils attributable to this genus were first described by Georg zu Münster in 1839 under the name Bolina pustulosa, but the generic name was changed in 1861 after Albert Oppel noted that it was preoccupied. The genus has been place

Acanthochirana is an extinct genus of prawn that existed during the upper Jurassic period. It was named by E. Strand in 1928. They are distinguished from the related genus Aeger by the presence of teeth on the rostrum, which are absent in Aeger.