Trilobites
Order Phacopida
Geologic Age: Middle Devonian
Trilobite is 24 mm long
Wanakah Member, Hamilton Group, Gennesee County, New York
Remarks: Note the mottled exoskeleton. One hypothesis put forth by
researchers is that the darker areas are preserved melanophores
that could expand
an
contract,
allowing
the
trilobite to change color. that is, adaptive camouflage. Also note
the tubercles on
the exoskeleton, and on the pygidial spines particularly.
Also see:
US Trilobites
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