-NA-C La-W;^e^ DO NOT ^'-^—^^-^ ^oou. LIBRARY B R E V I O R A569 Musemim of Contiparaitive Zoolog^uY. Cambridge, Mass. 15 September, 1969 Number 328 A NEW FOSSIL DISCOGLOSSID FROG FROM MONTANA > AND WYOMING' Richard Esfes Abstract. Scotiophryne piistulosa, n. gen., n. sp., is a small discoglossid frog from the late Cretaceous Hell Creek Formation of Montana and the late Cretaceous Lance Formation of Wyoming. It is probably also repre-sented in the middle Paleocene Tongue River Formation of Montana. Scoti-ophryne has a distinctive pustular dermal skull, but its postcranial remains show resemblances to the Recent Eurasian discoglossid Bomhina. INTRODUCTION Fossil frogs of Mesozoic age are rare; Hecht (1963) has sum-marized most of the occurrences. North American Mesozoic rec-ords, so far, are based on disarticulated remains, which are difficult to interpret. Recent study of late Cretaceous and Paleocene samples of verte-brate fossils has revealed the presence of several different kinds of frogs. Lance Creek (Wyoming) and Bug Creek local faunas (Montana) are rich samples of a once widespread late Mesozoic vertebrate fauna that lived on floodplains of North American Cre-taceous epicontinental seas (Estes, 1964). The Bug Creek mate-rial is from the Hell Creek Formation of Montana (Sloan and Van Valen, 1965) and is part of a Bug Creek collection in the Museum of Comparative Zoology (MCZ), Harvard University. An Amer-ican Museum of Natural History (AMNH) collection from the Lance Formation of Wyoming is also utilized here. The Paleocene specimens are from Princeton University (PU) collections from the Tongue River Formation of Montana, and are part of a fauna presently being studied in collaboration with Glenn Jepsen and Marshall Lambert. ^Fossil Vertebrates from the Hell Creek Formation, Montana: Contribu-tion No. 4.
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