Sponge holdfast

Sponge holdfast (Pennsylvanian)

Sponge holdfast (Pennsylvanian)

Sponge holdfast (Pennsylvanian)
Sponge holdfast
Sponge holdfast (Pennsylvanian)
Sponge holdfast

Viewer Comments

Very interesting specimen. Identification as a sponge holdfast
is reasonable. Note the long straight spicules. This is a variant.

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Phylum Porifera (sponges)
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