Eospirifer — ▪ brachiopod genus of extinct brachiopods, or lamp shells, found as fossils in Middle Silurian to Lower Devonian marine rocks (the Silurian Period ended and the following Devonian Period began about 416 million years ago). The genus Eospirifer… … Universalium
Силурийская система — (период) силур, третья снизу система палеозойской группы, соответствующая третьему периоду палеозойской эры геологической истории Земли. Названа по древнему кельтскому племени силуров, населявших пограничную область Уэльса в… … Большая советская энциклопедия
Spiriferida — Eospirifer radiatus (Sowerby, 1835) Zeitraum Silur bis Jura 440 bis 170 Mio. Jahre Systematik … Deutsch Wikipedia
Spiriferida — Taxobox name = Spiriferida image width = 250px image caption = Mucrospirifer sp. regnum = Animalia phylum = Brachiopoda subphylum = Rhychonelliformea classis = Rhynchonellata ordo = Spiriferida ordo authority = Waagen, 1883 subdivision ranks =… … Wikipedia
List of brachiopod genera — Taxobox name = Brachiopoda fossil range = Cambrian Recent image width = 250px image caption = Rhynchotella inconstans lived some 155 150 million years ago (mya) regnum = Animalia phylum = Brachiopoda phylum authority = Duméril, 1806 subdivision… … Wikipedia
Taxonomy of commonly fossilised invertebrates — Although the phylogenetic classification of sub vertebrate animals (both extinct and extant) remains a work in progress, the following taxonomy attempts to be useful by combining both traditional (old) and new (21st century) paleozoological… … Wikipedia
SIEGÉNIEN — Ancien étage du Dévonien inférieur qui est remplacé aujourd’hui par le Praguien. Le Siegérien désigne les Siegener Stufe, qui sont les grauwackes de Siegen dans le nord du Massif schisteux rhénan. Il comporte également l’ensemble des grès du… … Encyclopédie Universelle
