Kodymirus is a problematic genus of Cambrian

Cambrian

The Cambrian is the first geological period of the Paleozoic Era, lasting from Mya ; it is succeeded by the Ordovician. Its subdivisions, and indeed its base, are somewhat in flux. The period was established by Adam Sedgwick, who named it after Cambria, the Latin name for Wales, where Britain's...

 arthropod

Arthropod

An arthropod is an invertebrate animal having an exoskeleton , a segmented body, and jointed appendages. Arthropods are members of the phylum Arthropoda , and include the insects, arachnids, crustaceans, and others...

, known from the Czech republic

Czech Republic

The Czech Republic is a landlocked country in Central Europe. The country is bordered by Poland to the northeast, Slovakia to the east, Austria to the south, and Germany to the west and northwest....

, which bears some resemblance to 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...

s, aglaspidids and chelicerates. It is part of a small and low-diversity fauna endemic to the area, which dwelt in brackish waters.

Along with the very closely related Kockurus

Kockurus

Kockurus is a problematic genus of Cambrian arthropod, known from the Czech republic, which bears some resemblance to the eurypterids, aglaspidids and chelicerates...

, it is an enigmatic Cambrian arthropod whose precise taxonomic affinity is uncertain, but is best considered to be a stem-group or ally of the aglaspidids.