GLOSSARY ENTRY (DERIVED FROM QUESTION BELOW) | ||||||
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12:35 Sep 3, 2007 |
Arabic to English translations [PRO] Science - Zoology / invertebra, sea | |||||||
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| Selected response from: zkt Lebanon Local time: 13:56 | ||||||
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Summary of answers provided | ||||
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4 | bivalvias |
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3 | gastropod mollusks |
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Discussion entries: 5 | |
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bivalvias Explanation: http://www.factmonster.com/ce6/sci/A0859723.html |
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gastropod mollusks Explanation: Veliger: A larval stage of a mollusk characterized by the presence of a velum. Velum: A ciliated swimming organ that develops in certain larval stages of most marine gastropod mollusks. A covering or partition of thin membranous tissue, such as the veil of a mushroom or a membrane of the brain. http://www.reefs.org/library/glossary.html#V Part 9- Phylum MOLLUSCA Mollusks are one of the mega-sized phyla in the ocean. The name Mollusca comes from the Greek, mollis, which means “soft,” and all members of this phylum have soft, muscular bodies that are usually protected by one or more external calcium shells (in adulthood). The shell forms early in life and helps us determine which mollusk class a planktonic larva belongs to. Gastropod larvae have a single, spiral shell and Bivalve larvae have two “clam shaped” shells. Mollusks undergo at least two stages in the plankton before their final metamorphosis to a benthic life. The first stage of mollusk development is known as the trochophore larva and is very similar to the Polychaetes stage of the same name. The second stage is the veliger larva from the latin word velum, which means "veil" or "wing." The velum is a large beautiful winged structure bordered by actively beating cilia. Veligers live in the plankton and grow until their shells become too big and heavy to float. They sink as they undergo a final metamorphosis to a benthic adulthood. A Guide to the M A R I N E P L A N K T O N of southern California This Guide, and other resources, are available for download a no cost from: http://www.msc.ucla.edu/oceanglobe and is intended for non-profit, face-to-face, educational use ONLY. © 2003 Robert Perry. All Rights Reserved. name________________________________________________________ Robert Perry - UCLA OceanGLOBE & Malibu High School -------------------------------------------------- Note added at 1 hr (2007-09-03 13:49:03 GMT) -------------------------------------------------- I chose gastropode over bivalve because of your text saying يزحف usually in arabic gastropode is translated by بطنيات الأقدام (معجم أحمد شفيق الخطيب) |
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