Illaenus crassicauda (Wahlenberg, 1826)

Description

Illaenus crassicauda, Upper Ordovician, Kukruze level, Alexeevka quarry, St.-Petersburg region, size: trilobite - 3.6 x 3.2 x 1.4cm, specimen - 9.5 x 9.5 x 2.5cm, best quality and preservation, restoration about 1-2%, rare species