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Morphology and ontogeny of some Middle Ordovician gonambonitid brachiopods from Baltoscandia

100%

Madison A. A.

Acta Palaeontologica Polonica

2018

tom 63

nr 3

The Volkhovian–Kunda boundary deposits of the Leningrad Region contain two closely related genera, Antigonambonites and Anchigonites. The latter genus was previously known only by valve moulds; here its shell exterior and interior, and ontogeny are described in detail based on the collection of well-preserved disarticulated valves of Anchigonites conulus. Antigonambonites and Anchigonites share similar developmental and morphological features, and ecological strategies including the attachment by cementation by a “pedicle tube” and are thus possibly phylogenetically related. A new diagnosis for the genus Anchigonites and description of A. conulus are provided; other species of Anchigonites are briefly revised. The moulds of outer epithelial cells are described for the first time for the class Strophomenata.

Ograniczanie wyników

1 Acta Palaeontologica Polonica

1 Madison A. A.

1 2018

Wyniki wyszukiwania

Morphology and ontogeny of some Middle Ordovician gonambonitid brachiopods from Baltoscandia