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- Title
Morphology and ontogeny of some Middle Ordovician gonambonitid brachiopods from Baltoscandia.
- Authors
MADISON, ANNA A.
- Abstract
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.
- Subjects
BRACHIOPODA; ONTOGENY; SPECIES distribution; MARINE invertebrates; BIOLOGY
- Publication
Palaeontologia Polonica, 2018, Vol 63, Issue 3, p1
- ISSN
0078-8562
- Publication type
Article
- DOI
10.4202/app.00488.2018