Strobilopterus is a genus of prehistoric 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...

 of the family Dolichopteridae

Dolichopteridae

Dolichopteridae 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...

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Description

Dolichopterids, which lived in the Silurian and Devonian periods, were medium-sized, and had outer surfaces that were either smooth with pustules and semilunar scales. Their compound eyes were arcuate and located anteriorly on the prosoma (head). Their abdomens had epimers (lateral projections). The telson, (tail) was lanceolate. Their chelicerae were small, and the first three pairs of walking lags were stout, with powerful spines. The last pair of walking lags had supplementary lobes, while the swimming lags had the last joint enlarged, as part of the paddle. The male genital appendage was long.

Strobilopterus is distinguishable by its outer surface that has pustules and semilunar scales. Its semiovate prosoma (head) is with submarginal compound eyes, and the strongly serrate margins on the distal joints and lobes of the swimming legs.

Species

The following species

Species

In biology, a species is one of the basic units of biological classification and a taxonomic rank. A species is often defined as a group of organisms capable of interbreeding and producing fertile offspring. While in many cases this definition is adequate, more precise or differing measures are...

has been named:

• Strobilopterus princetonii Ruedeman, 1935 – Wyoming, USA (Devonian)