单词 | archaeogastropod |
释义 | archaeogastropodn. Zoology. Any of various chiefly marine gastropod molluscs constituting the prosobranch order Archaeogastropoda, which show several primitive characteristics and comprise many sea snails, limpets, abalones, and related forms.These are now generally regarded as paraphyletic and recent classifications place them in various subclasses. ΘΚΠ the world > animals > invertebrates > subkingdom Metazoa > grade Triploblastica or Coelomata > class Gastropoda > [noun] > other types of gastropod mollusc purpura1598 patella1671 canoe-shell1711 oliva1823 monoceros1828 Olivella1835 holostome1864 sundial1868 archaeogastropod1955 1955 J. E. Morton in Philos. Trans. (Royal Soc.) B. 239 151 In the majority of living archaeogastropods..a prominent, sometimes spirally coiled caecum was developed. 1975 Nature 15 May 233/1 Calcified eggs have also been reported from land archaeogastropods and from some of those mesogastropods which deposit their eggs on land. 2012 J. Frýda in J. A. Talent Earth & Life ii. 425/1 The euomphalomorph protoconch is not deformed during late embryonic stages to a spiral coil, as is typical in fossil and living archaeogastropods. This is a new entry (OED Third Edition, September 2016; most recently modified version published online December 2021). < n.1955 |
随便看 |
英语词典包含1132095条英英释义在线翻译词条,基本涵盖了全部常用单词的英英翻译及用法,是英语学习的有利工具。