Stenochirus is an extinct genus of decapod crustaceans that lived from the Callovian to Tithonian stages of the Jurassic period. Its fossils have been found in Germany and France.
S. angustus as illustrated in Münster's 1839 paper, originally labelled as Bolina angusta
Comparison of the pincers of S. mayeri (left) and S. angustus (right)
A carapace is a dorsal section of the exoskeleton or shell in a number of animal groups, including arthropods, such as crustaceans and arachnids, as well as vertebrates, such as turtles and tortoises.
The molted carapace of a lady crab from Long Beach, New York
Diagram of an arachnid, with the carapace highlighted in purple
A Greek tortoise shell opened to show the skeleton from below