genus of trilobites (extinct arthropods) found in Europe and North America as fossils in rocks of Ordovician to Silurian age (between 408 and 505 million years old). Bumastus is very distinctive in form; the head and tail regions are smooth and very large and have fused segments. Its elliptical body is flat on the bottom; the back and sides are strongly concave and arched. Bumastus was a bottom-dwelling form.

* * *

Universalium. 2010.

Игры ⚽ Поможем решить контрольную работу

Look at other dictionaries:

  • BUMASTUS Uva — quod acinos haberet hederae mammis, i. e. acinis similes, dicta est, a particula intensiva βοῦ et nomine μαςτὸς, mamma. Plin. l. 14. c. 3 In pergulis vero seruntur, escariae appellatae: Ederae acinis albae nigraeque bumasti, totidem coloribus.… …   Hofmann J. Lexicon universale

  • Fisk Holbrook Day — was a physician and an amateur geologist in Wisconsin who developed an impressive collection of Silurian age fossils. The collection is now at Harvard University.[1] Day was born on March 11, 1826 in Richmond, New York. He graduated from… …   Wikipedia

  • Trilobite — ] Highly complex compound eyes are another obvious feature of the cephalon (see below). Figure 3 shows gross morphology of the cephalon. The cheeks (genae) are the pleural lobes on each side of the axial feature, the glabella. When trilobites… …   Wikipedia

  • Wenlock Group — (Wenlockian), in geology, is the middle series of strata in the Silurian (Upper Silurian) of Great Britain. This group in the typical area in the Welsh border counties contains the following formations: Much Wenlock Limestone Formation, 90 300 ft …   Wikipedia

  • List of trilobites — This list of trilobites is a comprehensive listing of all genera that have ever been included in the class Trilobita, excluding purely vernacular terms. The list includes all commonly accepted genera, but also genera that are now considered… …   Wikipedia

  • Список родов трилобитов — Asaphiscus wheeleri Список родов трилобитов. A Содержание: A …   Википедия

  • ДОЛБОРСКИЙ ЯРУС — [по эвенкийскому слову долбор север], Никифорова, 1955, пятый снизу ярус ордовикской системы, принятый в СССР для Сибирской палеозоо географической провинции. Характерны: Boreadorthis asiatica Nik., Glyptorthis pulchra Wang, Rhinidictya bifurcata …   Геологическая энциклопедия

  • Facial suture (trilobite anatomy) — Facial sutures are sutures in the cephalon (head) of most trilobites, along which the exoskeleton splits during molting. Contents 1 Description 1.1 Dorsal sutures …   Wikipedia

Share the article and excerpts

Direct link
Do a right-click on the link above
and select “Copy Link”