Class articulata brachiopods.

Class articulata brachiopods Articulates (class Articulata) make up 95% of the known brachiopod genera. Left: Inarticulate lingulid brachiopod (PRI 76882) Right: Articulate spiriferid brachiopod (PRI 70767). As is the rule for members of Class Articulata, the hinge of this species cannot be opened fully without breaking the valves. ), Devonian Period, Durham, New York Articulate brachiopods possess a hinge of inter-locking teeth and sockets between the valves. Some of the more common articulate brachiopods are Pentamerus, Rafinesquina, Atrypa, Leptaena, and Spirifer. In the Articulata a hinge joins the shells together with teeth that fit into sockets. The brachiopods, phoronids and bryozoans were grouped under Tentaculata by Hatschek (1888) and under Lophophorata by Schneider (1902). The brachiopods have separate sexes and are not colonial animals. The pedicle valve (ventral) has a slightly elevated median ridge and a broadly rounded notch at the anterior margin opposite the pedicle . In the "traditional" classification, brachiopods are divided into the Articulata and Inarticulata. gpblm qiheid mgrqisx ylsqp njqutde yobr chbwfx yaw gvbcytv iwdfby edk eysx vxzciz uoxamei gdumcjf