Tabulata (subclass Zoantharia) A Palaeozoic order of zoantharians that are always colonial, never solitary, and that possess small corallites. Tabulae (see TABULA) are the major skeletal elements and septa (see SEPTUM) are usually absent. The corallum is built of individual corallites, not always connected to each other, and may be encrusting, may consist of thin sheets, or may be massive. Other forms may be joined side by side to form fence-like structures. Smaller tabulates appear to have lived in deeper waters, whereas the larger tabulates appear in coral-stromatoporoid (see STROMATOPOROIDEA) associations.
More From encyclopedia.com
Stony corals , Scleractinia (Madreporaria; stony corals; subclass Zoantharia) Order of solitary or, more commonly, colonial corals, which always possess an external… side-necked turtle , side-necked turtles See PLEURODIRA. Madreporaria , Madreporaria (Scleractinia; stony corals; class Anthozoa, subclass Zoantharia) An order of colonial (or, more rarely, solitary) corals, which always… Maximilian II (Holy Roman Empire) , May the fifth month of the year, in the northern hemisphere usually considered the last month of spring and harbinger of summer. From the late 16th c… from side to side , side / sīd/ • n. 1. a position to the left or right of an object, place, or central point: a town on the other side of the river on either side of th… Pygidium , pygidium (adj. pygidial) The posterior part of the exoskeleton of a trilobite (Trilobita); it is generally formed by the fusion of several body segme…
About this article
Updated About encyclopedia.com content Print Article
You Might Also Like