''Mursiopsis'' is an extinct

genus Genus (; : genera ) is a taxonomic rank above species and below family (taxonomy), family as used in the biological classification of extant taxon, living and fossil organisms as well as Virus classification#ICTV classification, viruses. In bino ...

of box

crab Crabs are decapod crustaceans of the infraorder Brachyura (meaning "short tailed" in Greek language, Greek), which typically have a very short projecting tail-like abdomen#Arthropoda, abdomen, usually hidden entirely under the Thorax (arthropo ...

s belonging to the family

Calappidae Calappidae is a family of crabs containing the following genera: Fossils within this family can be found in sediment of Europe, United States, Mexico, Central America, Australia and Japan from Cretaceous The Cretaceous ( ) is a geological ...

. The type species of the genus is ''Mursiopsis pustulosus'', Ristori 1889. Fossils of crabs within this genus can be found in sediment of

Oligocene The Oligocene ( ) is a geologic epoch (geology), epoch of the Paleogene Geologic time scale, Period that extends from about 33.9 million to 23 million years before the present ( to ). As with other older geologic periods, the rock beds that defin ...

(33.9 to 23.03 million years ago).

References

Calappoidea {{Eubrachyura-stub