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.
By Laura Klappenbach. Hexapods (Hexapoda) are a group of arthropods that include more than 1,000,000 described species, most of which are insects but a handful of which belong to the lesser-known group, the Entognatha.In terms of sheer number of species, no other group of animals comes close to the hexapods.nimals Invertebrates Arthropods. Hexapods are divided into the following basic groups: 1  Insects (Insecta) - There are more than one million species of insects that have been identified and scientists estimate that there may be many millions more species yet to be named.