McLaughlin, Patsy A. Shannon Point Marine Center, Western Washington University, Anacortes, Washington.
- Related Primary Literature
- Additional Reading
An order of the subclass Myodocopa, class Ostracoda, characterized by biramous antennae with the endopod and exopod of similar size, reduction or absence of the seventh pair of appendages, an unpaired male copulatory organ, and the absence of a median eye. The taxon is subdivided into two suborders, Halocypridina and Cladocopina; each has both Recent and fossil representatives. Extant halocyprids (see illustration) are small ostracods, measuring less than 0.4 in. (10 mm). The shell, which may be smooth or ornamented, may be strongly calcified or soft and may or may not bear a rostrum at its anterior end. The two orders exhibit major differences. The Halocypridina possess a uniramous maxillule, whereas that of the Cladocopina is distinctly biramous. The seventh pair of appendages is reduced to one or two segments and a pair of bristles in the Halocypridina, but the sixth pair is elongate; in the Cladocopina both the sixth and seventh pairs are absent. A heart may or may not be present in the halocypridinids, but it is totally absent in cladocopinids. Differences are also evident in the mandible and armature of the caudal furca.
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