Sp. Robson et Br. Pratt, Cambrian and Ordovician linguliform brachiopods from the Shallow Bay Formation (Cow Head Group), western Newfoundland, J PALEONTOL, 75(2), 2001, pp. 241-260
Linguliform brachiopods were recovered from the Upper Cambrian Downes Point
Member (lower Sunwaptan) and from the Middle Ordovician Factory Cove Membe
r (Arenig) of the Shallow Bay Formation, Cow Head Group, of western Newfoun
dland. These rocks are a series of Middle Cambrian to Middle Ordovician con
glomerates, lime mudstones, and shales that formed a sediment apron at the
base of the lower Paleozoic continental slope of Laurentia. The linguliform
brachiopod fauna consists of sixteen species assigned to twelve genera. Th
ree new species are described: Picnotreta lophocracenta, Neotreta humberens
is, and Siphonotretella parvaducta.