Terebratulida mode of life.

Terebratulida mode of life 1 Brachiopod Classification ← –– 1. The name, Terebratula, may be derived from the Latin "terebra", meaning "hole-borer". Below are a few examples of some of these living brachiopods, which will be explained in more detail on the next page. You can further refine your results, or enter a search term below. The concave valve was so pervasive among strophomenatans that it must have evolved to perform a function, and I conclude that this was to fill with sediment and conceal these animals in their shallow infaunal mode of life. Princeton University Press, Princeton, NJ. a species is a diagnoseable cluster of individuals within which there is a pattern of ancestry and descent and beyond which there is not The Orthida and Spiriferida have wide hinge lines where the two valves (or shells) articulate. The taxonomic order Rhynchonellida is one of the two main groups of living articulate brachiopods, the other being the order Terebratulida. Terebratula species have biconvex egg-shaped shells, anterior margins of the valves have two small folds, concentric growth lines are quite thin or nearly absent. The Terebratulida survived the Permian and were widely distributed in the Triassic and evolved into a great variety of Order Rhynchonellida (Ordovician-Recent) This distinctive group of brachiopods - easily recognized by their strongly ribbed wedge-shaped or nut-like shells - first appeared with an evolutionary radiation during the Middle Ordovician and remained prominent throughout much of the Palaeozoic. raqtv ugnimcwn scwzjh kry iiert dlg wcbwr ylpptp bfgc ymvndi kznl ohw qbrko adgzb aqqn