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Rhynchonellida

Rhynchonellida (rhynchonellids; class Articulata) Order of brachiopods (Brachiopoda), with rostrate shells, a functional pedicle, and a delthyrium partly restricted by a pair of deltidial plates. The shell is usually impunctate. They appeared first in the Middle Ordovician. The order contains about 250 genera, most of which are extinct.

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"Rhynchonellida." A Dictionary of Earth Sciences. . Retrieved April 25, 2017 from Encyclopedia.com: http://www.encyclopedia.com/science/dictionaries-thesauruses-pictures-and-press-releases/rhynchonellida

Rhynchonellida

Rhynchonellida (phylum Brachiopoda, class Articulata) An order of brachiopods that have rostrate shells, a functional pedicle, and a delthyrium partly restricted by a pair of deltidial plates. The shell is usually impunctate. They appeared first in the Middle Ordovician. The order contains about 250 genera, most of which are extinct.

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"Rhynchonellida." A Dictionary of Zoology. . Encyclopedia.com. 25 Apr. 2017 <http://www.encyclopedia.com>.

"Rhynchonellida." A Dictionary of Zoology. . Encyclopedia.com. (April 25, 2017). http://www.encyclopedia.com/science/dictionaries-thesauruses-pictures-and-press-releases/rhynchonellida-0

"Rhynchonellida." A Dictionary of Zoology. . Retrieved April 25, 2017 from Encyclopedia.com: http://www.encyclopedia.com/science/dictionaries-thesauruses-pictures-and-press-releases/rhynchonellida-0

rhynchonellids

rhynchonellids See RHYNCHONELLIDA.

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"rhynchonellids." A Dictionary of Earth Sciences. . Encyclopedia.com. 25 Apr. 2017 <http://www.encyclopedia.com>.

"rhynchonellids." A Dictionary of Earth Sciences. . Encyclopedia.com. (April 25, 2017). http://www.encyclopedia.com/science/dictionaries-thesauruses-pictures-and-press-releases/rhynchonellids

"rhynchonellids." A Dictionary of Earth Sciences. . Retrieved April 25, 2017 from Encyclopedia.com: http://www.encyclopedia.com/science/dictionaries-thesauruses-pictures-and-press-releases/rhynchonellids