Merostomoidea

The following article is from The Great Soviet Encyclopedia (1979). It might be outdated or ideologically biased.

Merostomoidea

 

a class of fossil primitive arthropods. They are from the Cambrian and Ordovician in North America and the Devonian in Western Europe. They bear some resemblance to trilobites but differ from them in the structure of their limbs and by usually having a rodlike caudal spine (telson). There were five orders, comprising about ten genera.

REFERENCE

Osnovy paleontologii. Chlenistonogie: Trihbitoobraznye i rakoobraznye. Moscow, 1960. Page 195.
The Great Soviet Encyclopedia, 3rd Edition (1970-1979). © 2010 The Gale Group, Inc. All rights reserved.