Eurypteroidea
Encyclopedia
Eurypteroidea are an extinct superfamily of eurypterids.
to Permian
periods, were characterized by their last pair of prosomal (head) appendages, which were developed as swimming legs, carrying paddles formed by the expansion of the two penultimate joints.
Description
Eurypteroidea, which lived from the OrdovicianOrdovician
The Ordovician is a geologic period and system, the second of six of the Paleozoic Era, and covers the time between 488.3±1.7 to 443.7±1.5 million years ago . It follows the Cambrian Period and is followed by the Silurian Period...
to Permian
Permian
The PermianThe term "Permian" was introduced into geology in 1841 by Sir Sir R. I. Murchison, president of the Geological Society of London, who identified typical strata in extensive Russian explorations undertaken with Edouard de Verneuil; Murchison asserted in 1841 that he named his "Permian...
periods, were characterized by their last pair of prosomal (head) appendages, which were developed as swimming legs, carrying paddles formed by the expansion of the two penultimate joints.
Families
- Class MerostomataMerostomataMerostomata is the name given to a grouping of the extinct Eurypterida and the Xiphosura . The term was originally used by James Dwight Dana to refer to Xiphosura only, but was emended by Henry Woodward to cover both groups....
Dana, 1852 - Order Eurypterida Burmeister, 1843
- Subroder Eurypterina Burmeister, 1845
- Superfamily Eurypteroidea Burmeister, 1845
- Family DolichopteridaeDolichopteridaeDolichopteridae are an extinct family of eurypterids that lived in the Silurian and Devonian periods.-Description:Dolichopteridae had outer surfaces that were either smooth or with pustules and semilunar scales. Their compound eyes were arcuate and located anteriorly on the prosoma . Their...
Kjellesvig-Waering & Størmer, 1952 - Family EurypteridaeEurypteridaeEurypteridae are an extinct family of eurypterids. They were members of the superfamily Eurypteroidea.-Description:Eurypteridae, which lived during the Silurian period, were characterized by small to large exoskeletons with inconspicuous semilunar scales or curved ridges. The telson, was...
Burmeister, 1845 - Family Erieopteridae Tollerton, 1989
- Family Dolichopteridae