Lath seen from the back with brown coat oozing through. Lath and plaster is a building process used to finish mainly interior walls and ceilings in Canada and the United States until the late 1950s. After the 1950s, drywall began to replace the lath and plaster process in the United States.
Chapter 6: Phylum Brachiopoda. 6.1 Introduction. While recent brachiopods are a rather rare and insignificant group, their long fossil history shows that they were at times the most prominent animals in the seas.he phylum is quite important for biostratigraphy, paleoecology, and evolutionary studies because it shows a great variety of changes in form and function through time. Brachiopods appear near the beginning of the Cambrian, but did not become abundant until the Early Ordovician.
The Phylum Brachiopoda, which appeared in the Lower Cambrian Period, was one of the most abundant Paleozoic fossil phyla with over 30,000 species.That number has now dropped to 280 living species. The animal has two unequal valves which makes the brachiopodâs exoskeleton.They have a tiny heart with a poorly-developed circulatory system. Their respiratory and digestive systems are very primitive.he Phylum Brachiopoda, which appeared in the Lower Cambrian Period, was one of the most abundant Paleozoic fossil phyla with over 30,000 species.