Rostrum
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Rostrum (anatomy)
Crustacean: the rostrum of the shrimp Macrobrachium rosenbergii is serrated along both edges.
Insect: assassin bug piercing its prey with its rostrum
Cephalopod: the two-part beak of a giant squid
The rostrum of a bottlenose dolphin
The term rostrum (from the Latin rostrum, meaning "beak") is used for a number of unrelated structures in different groups of animals:
- In crustaceans, the rostrum is the forward extension of the carapace in front of the eyes.[1] It is generally a rigid structure, but can be connected by a hinged joint, as seen in Leptostraca.[2]
- Among insects, the rostrum is the name for the piercing mouthparts of the order Hemiptera. The long snout of weevils may also be called a rostrum.[3]
- Cephalopod molluscs have hard beak-like mouthparts referred to as the rostrum.[5]
- The beak or snout of a vertebrate may be referred to as the rostrum.[6]
References
- ^ Charles Drew (November 17, 2003). "Crustacea". University of Bristol. http://palaeo.gly.bris.ac.uk/palaeofiles/fossilgroups/crustacea/anatomy.html. Retrieved November 7, 2010.
- ^ Todd A. Haney, Joel W. Martin & Eric W. Vetter (2007). "Leptostraca". In James T. Carlton. The Light and Smith Manual: Intertidal Invertebrates from Central California to Oregon (4th ed.). University of California Press. pp. 484–495. ISBN 978-0-520-23939-5. http://books.google.co.uk/books?id=64jgZ1CfmB8C&pg=PA484.
- ^ George Gordh, Gordon Gordh & David Headrick (2003). "Rostrum". A Dictionary of Entomology. CAB International. p. 792. ISBN 978-0-85199-655-4. http://books.google.co.uk/books?id=d0XSwMJLDg4C&pg=PA792.
- ^ Douglas Grant Smith (2001). "Mollusca (gastropods, pelecypods)". Pennak's freshwater invertebrates of the United States: Porifera to Crustacea (4th ed.). John Wiley and Sons. pp. 327–400. ISBN 978-0-471-35837-4. http://books.google.co.uk/books?id=GqIctb8IqPoC&pg=PA328.
- ^ Burt Carter. "Cephalopods". Invertebrate Paleobiology. http://itc.gsw.edu/faculty/bcarter/paleo/labs/moll/ceph.htm.
- ^ "Basic anatomy of Cetaceans - Dolphins". Robin's Island. http://www.robins-island.org/dolphins_anatomy.php. Retrieved November 7, 2010.
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