This is not necessarily called the record date in a company announcement. The phrase generally used will be something like ...will be paid on [payment date] to shareholders on the register at [record date]. â¢ The payment date.
Animals that have true coelom are called Eucoelomates such as phylum Annelida, Arthropoda, Mollusca, Echinodermata, Hemichordata and Chordata. The fluid filled body cavity is lined with peritoneum, which is derived by embryonic mesoderm, and separates the digestive tract and outer body cell wall.
Within the Protostomes a number of phyla undergo what is known as spiral cleavage which is determinate, meaning that the fate of the cells is determined as they are formed.here are other significant differences between the protostome and deuterostome patterns of development: Most protostomes are schizocoelomates, meaning a solid mass of the embryonic mesoderm splits to form a coelom. A few, such as Priapulids, have no coelom, but they may have descended from schizocoelomate ancestors.