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.
Chordata, phylum Chordata-comprises true vertebrates and animals having a notochord. cephalochordate-fish-like animals having a notochord rather than a true spinal column. tunicate, urochord, urochordate-primitive marine animal having a saclike unsegmented body and a urochord that is conspicuous in the larva.. Any of numerous animals of the phylum Chordata, having at some stage of development a dorsal nerve cord, a notochord, and gill slits and including all vertebrates, the hagfishes, and certain marine animals such as the lancelets and the tunicates.