Uphantaenia chemungensis
Upper Devonian
Chemung Facies Siltstone
Tompkins County
New York, USA.

A rare fossil specimen of Uphantaenia chemungensis, an unusual Paleozoic sponge known from Devonian marine deposits. This species represents an uncommon form of early sponge morphology and is valued for both its rarity and distinctive structural appearance.

180mm slab with unusual basket-like sponge on both sides