Spiriferina的封面
书籍主题:

Spiriferina

Brachiopod

UtilPublishing (2011-08-26 )

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ISBN-13:

978-613-7-97678-4

ISBN-10:
6137976785
EAN:
9786137976784
书籍语言:
英文
作品简介:
Spiriferina is an extinct genus of brachiopod that lived from the Late Silurian to the Middle Jurassic in Asia, Europe, North America, South America, and New Zealand. Brachiopods are a phylum of marine animals that have hard "valves" (shells) on the upper and lower surfaces. Most species of brachiopod went extinct during the P–T extinction over 250 million years ago, but many survive today. Brachiopod valves are hinged at the rear end, while the front can be opened for feeding or closed for protection. Articulate brachiopods have toothed hinges and simple opening and closing muscles, while inarticulate brachiopods have untoothed hinges and more complex muscles. In a typical brachiopod a stalk-like pedicle projects from an opening in the hinge or from a hole in the larger valve, attaching the animal to the sea bed but clear of silt that would obstruct the opening.
出版社 :
UtilPublishing
网址:
http://www.betascript-publishing.com
出版发行由:
Isidoros Krastyo Morpheus
页码 :
60
发表日期:
2011-08-26
现货:
备有现货
类别:
古生物学
价格:
1,026.89 NT$
关键词:
Brachiopod, Brachiopods

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