Atrypa is a genus of brachiopod with round to short egg-shaped shells covered with many fine radial ridges (or costae). Growth lines form perpendicular...

Atrypa reticularis is an extinct species of brachiopods. The fossils are present from the base of Rhuddanian up to the top of Lower Frasnian. Paleobiology...

first recognised Silurian fossils. These fossils were brachiopods, mostly Atrypa duntroonensis. He discovered them around 1844 century and it was the first...

Dalmanites, Encrinurus and Proteus. Ostracods (beyrichids etc.), brachiopods (Atrypa reticularis, Leptaena, Eospirifer etc.), bryozoans and tentaculitids are...

southeastern part of the state. The Benton County brachiopods included Atrypa and Spirifer. Corals of Mississippian Iowa included the colonial Hexagonaria...

merges with its south arm. The Stairway Glacier lies to the west, and the Atrypa Glacier to the south. The mountain cannot be seen from any roads, but can...

spiriferid brachiopod Euryspirifer Brachyspirifer Orbiculoidea Anoplotheca Atrypa Chonetes ?Cryptonella Leptostrophia Loreleiella Meganteris Oligoptycherhynchus...

Blumenbachii); brachiopods (Leptaena rhomboidalis, Rhynchonella Wilsoni, Atrypa reticularis), pelecypods (Cardiola interrupts, Ctenodonta sulcata) and gastropods...

†Athyris spiriferoides †Atrypa †Atrypa newsomensis †Atrypa parva – or unidentified comparable form †Atrypa reticularis †Atrypa reticularus †Aulacophyllum...

Spirifer and Eospirifer) Suborder Atrypida [†] [!] (atrypid brachs such as Atrypa) Order Terebratulida [!] (most living brachiopods; includes fossil Dielasma)...