Diplograptus

Diplograptus

▪ graptolite genus
      genus of graptolites, small, extinct colonial marine animals thought to be related to the primitive chordates and restricted to ancient marine environments. Forms or species of Diplograptus are useful index, or guide, fossils for the Ordovician period (which occurred from 505 to 438 million years ago) and thus allow the correlation of sometimes widely separated rock units. Diplograptus is characterized by a caplike float from which featherlike assemblages of graptolite organisms were suspended. It was relatively large for a graptolite; several kinds of individuals were present in a colony.

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Universalium. 2010.

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  • Diplograptus — D. simplex Scientific classification Kingdom: Animalia Phylum …   Wikipedia

  • Diplograptus — Diplograptus, s. Graptolithen …   Meyers Großes Konversations-Lexikon

  • Diplograptus — ► PALEONTOLOGÍA Gén. de graptolites que vivieron durante el Ordoviciense …   Enciclopedia Universal

  • Diplograptus — Diplogrạptus,   Gattung der Graptolithen, verbreitet in Europa, Asien, Nordamerika und Australien vom Mittelordovizium bis zum Untersilur; mit unverzweigten, zweizeilig besetzten Ästen, die vermutlich in büschelförmigen Kolonien an einer… …   Universal-Lexikon

  • Llandeilo Group — In geology, the Llandeilo Group is the middle subdivision of the British Ordovician rocks. It was first described and named by Sir R. I. Murchison from the neighborhood of Llandeilo in Carmarthenshire. In the type area it consists of a series of… …   Wikipedia

  • Trefawr Track — Trefawr Track, a forestry road north of Cwm coed Aeron Farm, Llandovery, Wales, is the location of the Global Boundary Stratotype Section and Point (GSSP) which marks the boundary between the Rhuddanian and Aeronian stages of the Silurian period… …   Wikipedia

  • Geology of Wales — Wales is a peninsula in the south west of the island of Great Britain. The entire area of Wales is about 20,779 km² (8,023 square miles). It is about 274 km (170 miles) north south and 97 km (60 miles) east west. Wales is bordered by England to… …   Wikipedia

  • Graptolithen — (griech., »Schriftsteine«, Feilenkorallen), Familie ausgestorbener Tiere aus dem obern Cambrium und Silur. Sie sind langgestreckt, mehr oder weniger zusammengedrückt und haben bald auf einer (Monograpsus), bald auf beiden Seiten (Diplograpsus)… …   Meyers Großes Konversations-Lexikon

  • Silurische Formation — (hierzu Tafel »Silurische Formation I u. II«), ein 1835 von Murchison nach seinem örtlichen Auftreten (im Gebiete der alten Silurer, d. h. das westliche England) benanntes, vorwaltend aus Sandsteinen, Grauwacken, Tonschiefern, und Kalksteinen… …   Meyers Großes Konversations-Lexikon

  • ОРДОВИКСКАЯ СИСТЕМА — [по древнему кельтскому племени ордовики, населявшему Уэльс во времена Римской империи], Murchison, 1835; назв. предложено Лапвортом (Lapworth, 1879), вторая снизу система палеозойской гр. Принята в качестве самостоятельной системы лишь в 1960 г …   Геологическая энциклопедия

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