Spire (Mollusc)的封面
书籍主题:

Spire (Mollusc)

Mollusc, Shell, Snail, Gastropod, Habitat, Zoology

Part Press (2011-08-26 )

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ISBN-13:

978-613-7-97654-8

ISBN-10:
6137976548
EAN:
9786137976548
书籍语言:
英文
作品简介:
Please note that the content of this book primarily consists of articles available from Wikipedia or other free sources online. A spire is a descriptive term for part of the shell of a snail, a gastropod mollusc shell or gastropod shell. The spire consists of all of the whorls of a coiled gastropod shell except for the body whorl. Each spire whorl is a turn of 360° of the spire. The word is a convenient aid in describing shells, it does not refer to an immutable part of shell anatomy. In textbook illustrations of gastropod shells, the tradition (with a few exceptions) is to show the majority of shells with the spire uppermost on the page. The spire, when not damaged, includes the protoconch (also called : the nuclear whorls) (which is the larval shell), and most of the subsequent teleoconch whorls (also called : postnuclear whorls), which gradually increase in size as they are formed. Thus the spire in most gastropods has a point, which is known as the "apex". This is why the word "spire" is used, in analogy to a church spire.
出版社 :
Part Press
网址:
http://www.betascript-publishing.com
出版发行由:
Ben Stacy Jerrik
页码 :
84
发表日期:
2011-08-26
现货:
备有现货
类别:
动物学
价格:
34.00 €
关键词:
Zoology, habitat, mollusc, Shell, Snail, Gastropod

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