Well-preserved, newly hatched coiled nautiloids from the late Paleozoic are relatively unusual. Thus, the recovery of a hatchling specimen from the Sosio Limestone (Permian, probably Wordian) of Italy that can be assigned to Sholakoceras cf. S. pleuronautiloides (Gemmellaro, 1890) is notable. The embryonic and posthatchling shell of S. cf. S. pleuronautiloides shows some morphological similarities to Recent NautilusLinnaeus, 1758; however, some dissimilarities are significant, and these features have implications on the overall phylogenetic pattern exhibited by these organisms through time and the evolutionary processes that led to that pattern.

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The specimen comes from the extremely...

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