A new cryptostome bryozoanPtilotrypafrom the Upper Ordovician Yong Limestone Formation: Tethyan sequence of Kumaun Higher Himalaya, India

Abstract

AbstractA new species of the Paleozoic bryozoan genusPtilotrypaof the order Cryptostomata is described from the lower part of the Yong Limestone Formation, Katian, Upper Ordovician of the Kumaun Tethys Himalaya:Ptilotrypa bajpaiinew species. The presence of the genusPtilotrypain the Tethyan Himalaya suggests paleogeographic connections to the Upper Ordovician of North America and, consequently, Upper Ordovician age for the lower part of the Yong Limestone Formation. This species displays a reticulate colony shape, which suggests an efficient filtering capacity in an environment with a high primary production. Morphological peculiarities and systematic assignment of the genusPtilotrypaare discussed.UUID:http://zoobank.org/898276c8-2924-4da2-ae96-3392cb2ebbc3