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.
The archenteron has longitudinal cavities and those become the coelom in deuterostomes. Therefore, they are called enterocoelus animals. This means that there is only one type for the formation of the coelom in deuterostomes. There are two deuterostome phyla known as Echinodermata and Chordata.herefore, it could be concluded that animals in the most developed or evolved phyla in the Animal Kingdom are the deuterostomes. When these two phyla are considered, one (Echinodermata) belongs to the group of invertebrates.