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Excerpt from General Evolutionary Patterns and the System of the Class Bivalvia
Food gathering by means of the labial palps restricted the radiation of the Protobranchia. Most members of this superorder (order Nuculida) preserved features characteristic of mobile Bivalvia-an oval or anterior - posteriorly lengthened shell, a mobile foot with a flat sole, 2 adductor muscles, a nuculoid hinge con sisting of chevron-shaped teeth which grow in size in front of and behind the umbo, and primitive double ctenidia with lamellae directed centrally from the axis. The labial palps-the main food gathering organ - and the ligament primarily undergo changes.
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General Evolutionary Patterns and the System of the Class Bivalvia
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Paperback. Condizione: New. Print on Demand. This book presents an in-depth analysis of the evolution and systematics of the Bivalvia, also known as clams. The author provides a detailed examination of the morphological and functional diversity within this group of mollusks, exploring their evolutionary relationships and proposing a revised classification system based on the latest research. Significant emphasis is placed on the functional significance of shell structures and their role in adaptations to various marine and freshwater environments. The author also discusses the ecological and economic importance of Bivalvia and highlights the need for their conservation. This book is an essential reference for malacologists, paleontologists, and evolutionary biologists, offering a comprehensive understanding of the evolution, diversity, and significance of Bivalvia. This book is a reproduction of an important historical work, digitally reconstructed using state-of-the-art technology to preserve the original format. In rare cases, an imperfection in the original, such as a blemish or missing page, may be replicated in the book. print-on-demand item. Codice articolo 9780243203697_0
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