boothi Trilobite from Eighteen
Mile Creek New York
Order Phacopida, Subfamily Asteropyginae
Time: Middle Devonian
is 25 mm
Moscow Formation, Eighteen Mile Creek , North Evans, New York
A very good example of a member of the Order Phacopida, Subfamily
Asteropyginae with dramatic genal and pygidial spines. This one
is missing a bit of exoskeleton on the glabella. The right side
of the cephalon and thorax are a bit compressed, though fully present.
The Asteropyginae have recently undergone extensive revision, with
several members of the genus now placed in the recently erected
genera Bellacartwrightia and Kennacryphaeus. Most are usually found
as disarticulated specimens, but this one is quite complete, with
fine eye facets.
The species also comes from the Widder Shale, Hamilton
Group, Arkona, Ontario, Canada.
fossil pictures to enlarge
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