High Quality Content by WIKIPEDIA articles! A member of the Ediacaran biota which takes the form of a circular to oval impression preserved in hyporelief, six or more centimeters in diameter. They are surrounded by a frill that has been interpreted (Wade 1972) as a set of tentacles. The bifurcating radial ribs, spreading from a central dome, serve to distinguish this genus from the very similar Paleophragmodictya, and may represent the channels of the gastrovascular system (Fedonkin Cope 1985). Speculation that they may represent sponges (Gehling 1996) is not accepted by Sepkoski et al. (2002), who interpret it as a jellyfish-like cnidarian; it is believed that, in common with Ovatoscutum, they were free-swimming (Waggonner 1995). Cnidarian affinities are not necessarily refuted by Ivantstov Fedonkin (2002), who suggest that Rugoconites may possess tri-radial symmetry and be a member of the Trilobozoa. Данное издание представляет собой компиляцию сведений, находящихся в свободном...

В наличии:
	Sprinter - 1008 руб.	Перейти		Лучшая цена
	Books.Ru - 1128 руб.	Перейти
Под заказ:
	OZON.ru - 1125 руб.	Перейти

Рейтинг книги: 5 из 5, 8 голос(-ов).