Embryonic Development of the Phoronid Phoronis ijimai

Embryonic Development of the Phoronid Phoronis ijimai We studied the embryonic development of the phoronid Phoronis ijimai Oka, 1897. The egg cleavage is radial. The fourth and fifth cleavage furrows extend along the meridian of the egg. The blastula is flattened. Gastrulation occurs by a combination of epiboly, bending, and invagination. The mesoderm originates from two sources. The anterior mesoderm arises through immigration and gives rise to the first and second coeloms. The third coelomic mesoderm originates enterocoelically from the hindgut. The newly hatched larva has preoral and postoral ciliary bands, which can be compared with the corresponding ciliary bands of dipleurula and with the prototroch and metatroch of trochophore larvae. http://www.deepdyve.com/assets/images/DeepDyve-Logo-lg.png Russian Journal of Marine Biology Springer Journals

Embryonic Development of the Phoronid Phoronis ijimai

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Publisher
Kluwer Academic Publishers-Plenum Publishers
Copyright
Copyright © 2000 by MAIK “Nauka/Interperiodica”
Subject
Life Sciences; Freshwater & Marine Ecology
ISSN
1063-0740
eISSN
1608-3377
D.O.I.
10.1023/A:1009494621160
Publisher site
See Article on Publisher Site

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