- cystoids
- Геология: морские пузыри (Cystoidea), цистоидеи
Универсальный англо-русский словарь. Академик.ру. 2011.
cystoids
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Cystoids — Temporal range: Middle Ordovician–Permian … Wikipedia
Geologic time scale — This clock representation shows some of the major units of geological time and definitive events of Earth history. The Hadean eon represents the time before fossil record of life on Earth; its upper boundary is now regarded as 4.0 Ga.[1] Other… … Wikipedia
Ordovician — Period 488.3–443.7 million years ago … Wikipedia
Crinoid — Crinoids Temporal range: Ordovician Recent … Wikipedia
Devonian Period — Interval of geologic time from 417 to 354 million years ago; it was the fourth period of the Paleozoic Era. During the Devonian, a giant continent was situated in the Southern Hemisphere (see Gondwana), and other landmasses were located in the… … Universalium
Ordovician Period — Interval of geologic time, 490–443 million years ago, the second oldest period of the Paleozoic Era. It follows the Cambrian and precedes the Silurian. During the Ordovician, many of the landmasses were aligned in the tropics. Life was dominated… … Universalium
Echinosphaerites — ▪ fossil genus genus of cystoids, an extinct group related to the sea lily and starfish, found as fossils in Ordovician marine rocks (between 505 and 438 million years old). It is a useful guide, or index, fossil for Ordovician rocks and time. * … Universalium
pelma — /pelˈmə/ noun The sole of the foot ORIGIN: Gr pelma, atos sole, stalk • • • pelmatic / matˈik/ adjective Pelmatozōˈa plural noun A division of the Echinodermata, typically stalked, including crinoids and the fossil blastoids and cystoids … Useful english dictionary
