单词 | monoplacophora |
释义 | Monoplacophoran. Zoology. A class of mainly extinct univalved marine molluscs with a limpet-shaped shell, whose surviving members are found in deep water. Also (usually in form monoplacophora): molluscs of this class. ΘΚΠ the world > animals > invertebrates > subkingdom Metazoa > grade Triploblastica or Coelomata > phylum Mollusca > [noun] > class Monoplacophora Monoplacophora1957 Neopilina1957 1957 Nature 23 Feb. 413/1 Class Monoplacophora... This name was proposed originally by Odhner..to cover a group of extinct palæozoic molluscs hitherto regarded as primitive Patellacea, but differing from these in having six pairs of muscle scars arranged symmetrically on the inside of the shell. 1979 D. L. Dineley Fossils iv. 101 The monoplacophora..have small conical shells. 1991 R. A. Fortey Fossils (BNC) 76 Many authorities regard the Monoplacophora as lying at the root of the other molluscan groups; gastropods, cephalods and even bivalves may have been derived from them. This is a new entry (OED Third Edition, December 2002; most recently modified version published online March 2022). < n.1957 |
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