Rhinocarcinosoma
Encyclopedia
Rhinocarcinosoma is a genus of Silurian
eurypterid
, with a triangular carapace
, laterally positioned eyes, and a curved telson
. In 2002, a new species was described from the Dô Son Formation of the Dô Son Peninsula
of northern Vietnam
.
Silurian
The Silurian is a geologic period and system that extends from the end of the Ordovician Period, about 443.7 ± 1.5 Mya , to the beginning of the Devonian Period, about 416.0 ± 2.8 Mya . As with other geologic periods, the rock beds that define the period's start and end are well identified, but the...
eurypterid
Eurypterid
Eurypterids are an extinct group of arthropods related to arachnids which include the largest known arthropods that ever lived. They are members of the extinct order Eurypterida ; which is the most diverse Paleozoic chelicerate order in terms of species...
, with a triangular carapace
Carapace
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. In turtles and tortoises, the underside is called the plastron.-Crustaceans:In crustaceans, the...
, laterally positioned eyes, and a curved telson
Telson
The telson is the last division of the body of a crustacean. It is not considered a true segment because it does not arise in the embryo from teloblast areas as do real segments. It never carries any appendages, but a forked "tail" called the caudal furca is often present. Together with the...
. In 2002, a new species was described from the Dô Son Formation of the Dô Son Peninsula
Do Son
Đồ Sơn is a Vietnamese resort on the bank of the South China Sea, located 22 km away from Hai Phong city, which it administratively belongs to....
of northern Vietnam
Vietnam
Vietnam – sometimes spelled Viet Nam , officially the Socialist Republic of Vietnam – is the easternmost country on the Indochina Peninsula in Southeast Asia. It is bordered by China to the north, Laos to the northwest, Cambodia to the southwest, and the South China Sea –...
.
Species
Rhinocarcinosoma currently contains three species:- Rhinocarcinosoma cicerops (Clarke, 1907) - Otisville, New York (Silurian)
- Rhinocarcinosoma dosonensis Braddy, Selden, & Doan Nhat, 2002 - Dô Son, Vietnam (Silurian)
- Rhinocarcinosoma vaningeni (Clarke & Ruedemann, 1912) - Clinton, New York