Madin, Laurence P. Biology Department, Woods Hole Oceanographic Institution, Woods Hole, Massachusetts.
Last reviewed:October 2019
- Related Primary Literature
- Additional Reading
An order of the phylum Ctenophora (comb jellies) containing two monospecific genera, Cestum and Velamen, which have an unusual morphology. The transparent bodies of members of the order Cestida (cestids) are flattened in the tentacular plane and greatly elongated in the stomodeal plane so that they have the shape of a belt or ribbon (hence, the specific name Cestum veneris, “Venus' girdle”; see illustration). The mouth is at the midpoint of the length. Individuals of Cestum may be more than 39 in. (1 m) long, and of Velamen about 8 in. (20 cm). Brown or yellow pigment spots sometimes occur on the tips of the body. If disturbed, cestids, like other ctenophores, produce brilliant bioluminescence along their meridional canals. They occur worldwide in tropical and subtropical waters; C. veneris is one of the most common species in the oceanic Atlantic. The extreme fragility of their bodies makes cestids difficult to collect and maintain, and living specimens have been seen by few biologists. See also: Bioluminescence; Ctenophora
The content above is only an excerpt.
for your institution. Subscribe
To learn more about subscribing to AccessScience, or to request a no-risk trial of this award-winning scientific reference for your institution, fill in your information and a member of our Sales Team will contact you as soon as possible.
to your librarian. Recommend
Let your librarian know about the award-winning gateway to the most trustworthy and accurate scientific information.
AccessScience provides the most accurate and trustworthy scientific information available.
Recognized as an award-winning gateway to scientific knowledge, AccessScience is an amazing online resource that contains high-quality reference material written specifically for students. Contributors include more than 10,000 highly qualified scientists and 45 Nobel Prize winners.
MORE THAN 8700 articles covering all major scientific disciplines and encompassing the McGraw-Hill Encyclopedia of Science & Technology and McGraw-Hill Yearbook of Science & Technology
115,000-PLUS definitions from the McGraw-Hill Dictionary of Scientific and Technical Terms
3000 biographies of notable scientific figures
MORE THAN 19,000 downloadable images and animations illustrating key topics
ENGAGING VIDEOS highlighting the life and work of award-winning scientists
SUGGESTIONS FOR FURTHER STUDY and additional readings to guide students to deeper understanding and research
LINKS TO CITABLE LITERATURE help students expand their knowledge using primary sources of information