The Monoplacophora - University of California Museum of …
Monoplacophorans are small and limpet-like, having a single, cap-like shell. Some organs (kidneys, heart, gills) are repeated serially, giving rise to the now falsified hypothesis that they may have a close relationship with segmented organisms such as annelids and arthropods.
Monoplacophorans and the Origin and Relationships of Mollusks
2009年4月15日 · The story of the discovery and study of the Monoplacophora (or Tryblidia) and how they have contributed to our understanding of the evolution of the Mollusca highlights the importance of integrating data from the fossil record with the study of living forms.
Class Monoplacophora (Deep-sea Limpets) - Earth Life
2020年8月1日 · The monoplacophora, common name (deep-sea limpets) are a small, but ecologically important group of single-shelled molluscs. Photogenically they are a sister group to the Aplacophora. The length of the shell in adults ranges from 3mm to 35mm. They are also know by the name Tryblidia.
New data from Monoplacophora and a carefully-curated dataset …
2020年1月9日 · In order to resolve conchiferan relationships and improve understanding of early molluscan evolution, we carefully curated a high-quality data matrix and conducted phylogenomic analyses with broad...
28.3F: Classification of Phylum Mollusca - Biology LibreTexts
2023年10月31日 · Mollusks can be segregated into seven classes: Aplacophora, Monoplacophora, Polyplacophora, Bivalvia, Gastropoda, Cephalopoda, and Scaphopoda. These classes are distinguished by, among other criteria, the presence and types of shells they possess.
Monoplacophoran | Primitive, Shell-bearing, Marine | Britannica
monoplacophoran, (class Tryblidia), any of a group of primitive marine mollusks characterized by a single, cap-shaped shell and bilateral symmetry. The term Tryblidia is preferred over Monoplacophoran and Galeroconcha, because both latter terms are taken to include several fossil groups of uncertain relationships.
ADW: Monoplacophora: INFORMATION
Monoplacophorans are small and have a single, caplike shell, giving them a limpet-like appearance. A number of their organs (nephridia, heart, etc.) are repeated serially, making them resemble metamerically-arranged species such as annelids and arthropods.
Monoplacophora - SpringerLink
Monoplacophora, Lemche, 1957 (Fig. 1A, B, C), constitutes a class of living Mollusca. The calcareous shell is bilaterally symmetrical, oval, and with a subcentral to anterior apex so that it is cap-shaped to spoon-shaped.
Monoplacophora - an overview | ScienceDirect Topics
The main characteristics of Monoplacophora include (1) small, deep sea, almost bilaterally symmetrical; (2) have undivided arch shell; (3) body with distinct head and radula, without eyes or sensory tentacles (except around the mouth); (4) foot-retractor muscle; (5) anus median, posterior; (6) mantle cavity large, extending laterally and ...
Resolving the evolutionary relationships of molluscs with ... - Nature
2011年10月26日 · Casey Dunn and colleagues have managed to recover information from the crucial but hard-to-get-at Monoplacophora, a primitive group of deep-sea molluscs, revealing a shared ancestry with...
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