triplochiton scleroxcylon genus arcella taxophytina teredinid genus erechtite
small, brown with black head a hinged plastron (the bottom shell) a reddish brown carapace a gray-brown back brownish with black and white stripes on the head
dark or brown carapace (top shell) greyish-brown back and sides reddish-brown carapace (shell) the presence of fossils or other artifacts grey-brown back and head
a fossil on a black background
dark or brown carapace (top shell) greyish-brown back and sides fossilized reddish-brown carapace (shell) the presence of fossils or other artifacts
trilobite which has long antennae trilobite which has two-lobed tail chiton which has round, oval or elongated oval shell trilobite which has segmented body trilobite which has shell-like exoskeleton
trilobite which has long antennae trilobite which has two-lobed tail trilobite which has segmented body trilobite which has shell-like exoskeleton trilobite which has short, jointed legs
trilobite cretoxyrhina fossil decapoda chiton
trilobite fossil chiton pellet isopod
trilobite which has short, jointed legs trilobite which has shell-like exoskeleton trilobite which has compound eyes trilobite which has segmented body trilobite which has two-lobed tail
trilobite which has short, jointed legs trilobite which has two-lobed tail trilobite which has segmented body trilobite which has shell-like exoskeleton trilobite which has long antennae