Branched Holdfasts of Stemmed Echinoderms from the Middle Ordovician of the Leningrad Region
- Authors
- Type
- Published Article
- Journal
- Paleontological Journal
- Publisher
- Pleiades Publishing
- Publication Date
- Dec 29, 2021
- Volume
- 55
- Issue
- 10
- Pages
- 1100–1108
- Identifiers
- DOI: 10.1134/S0031030121100026
- Source
- Springer Nature
- Keywords
- Disciplines
- License
- Yellow
Abstract
AbstractAs a result of examination of the collection of holdfasts of stemmed echinoderms from the Ordovician of the Leningrad oblast, Russia, all holdfasts are divided into two large groups: “unbranched” and “branched.” Three morphotypes of branched holdfasts are identified and described in detail. Morphogenetic transitions between morphotypes and their relationship with the peculiarities of the evolution of stemmed echinoderms in the Ordovician evolutionary radiation were identified.
