Name: Trilobita:
Asaphus laticaudatus (Russian
Asaphida Trilobite)
Class
Trilobita; Order Asaphida;
Superfamily Asaphoidea; Family Asaphidae
Geological
Time: Middle Ordovician
Size: 78
mm
Fossil
Site: Russian trilobites Asery level, St. Petersburg region, Wolchow
river, Russia
|  Coming
from the Middle Ordovician Asery Level deposits near Saint Petersburg,
Russia, this is a rarely-seen trilobite known as Asaphus laticaudatus,
betrayed as such by the "widebody" appearance. Laticaudatus
means "wide-tailed". This trilobite was a descendant of
A. applanatus that took on a wider body aspect; a second branch
led to those that developed higher eyestalks, of which A. kotlukovi
was a representative. Notice the fine terracing found on the pygidium.
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