Vertebrate eggs

Pennsylvanian

Atrasado Formation, Tinajas Member

Kinney Brick Quarry, NM USA.

48mm egg cluster on 80mm slab.  See: Mamay, S. H. (1994).  Fossil eggs of probable piscine origin preserved on Pennsylvanian Sphenopteridium foliage from the Kinney Quarry, central New Mexico.  Journal of Vertebrate Paleontology, 14(3), 320-326.

Soft-bodied.

Fossil fish or amphibian eggs from Paleozoic sediments are extremely rare and otherwise known from perhaps just the Pit 11 Fauna of the Mazon Creek Biota.  The eggs were not shelled and were apparently laid in water.  It appears these eggs belonged to a fish.