Browsing by Author "Honey, James G."
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Item A generic revision of the Protolabidini (Mammalia, Camelidae) with a description of two new protolabidines. Bulletin of the AMNH ; v. 161, article 3(New York : American Museum of Natural History, 1978) Honey, James G.; Taylor, Beryl E."A revised diagnosis of the Protolabidini characterizes the tribe as having a narrow rostrum and laterally expanded anterior nares. Tanymykter, new genus, possess the above derived features and is included in the Protolabidini as the primitive sister taxon to Protolabis. The morphological features that separate Tanymykter from Protolabis are all primitive except for the derived condition of closely appressed P[superscript]1[subscript]1 roots. Based upon new material from the Milk Creek Formation, morphological distinctions between Protolabis and Procamelus are clarified. The principal derived features of Protolabis coartatus that differ from Procamelus are extreme constriction of the rostrum, lateral expansion of the anterior nares, P[subscript]1 and P[subscript]2 small and sometimes absent, and a mandibular angle with extreme lateral flare and a prominent mesial tuberosity. Although the above derived features are less pronounced, they are still present in Protolabis heterodontus and other undescribed samples in the collection of the American Museum of Natural History. Thus, Stirton's species, coartatus, which has previously confused the generic concept of Procamelus, is transferred to Protolabis. The small size of the cranium and coronoid process is correlated with the strong lateral and mesial flare of the mandibular angle in P. coartatus. This reflects increased emphasis on the masseter and pterygoid muscles in mastication and less emphasis on the temporalis. In contrast, the large coronoid process in Procamelus indicates greater emphasis on the temporalis muscle. Oxydactylus exilis Matthew is transferred to Michenia because it shares the derived features of a narrow rostrum, incisiform upper canine, and a shallow symphysis. A new species, Michenia yavapaiensis, with P[subscript]1 unerupted, P[subscript]2 small, unerupted or absent, and tall-crowned molars is described from the Milk Creek Formation. Finally, a cladogram of proposed relationships of the Protolabidini is presented, including Tanymykter, new genus, Protolabis and Michenia with supporting evidence for this tribe being a monophyletic group. The relationship of other members of the Camelinae to the Protolabidini is also discussed. A short section detailing the stratigraphic framework of the Milk Creek Formation, Yavapai County, Arizona is included"--P. 371.Item New records of eutherian mammals from the Goler Formation (Tiffanian, Paleocene) of California and their biostratigraphic and paleobiogeographic implications. (American Museum novitates, no. 3797)(American Museum of Natural History., 2014-02-06) Lofgren, Donald L., 1950-; McKenna, Malcolm C.; Honey, James G.; Nydam, Randall.; Wheaton, Christine.; Yokote, Bryan.; Henn, Lexington.; Hanlon, Whitney.; Manning, Stephen (Stephen Brian), 1990-; McGee, Carter.The Goler Formation is the only rock unit on the West Coast of North America that has yielded a diverse assemblage of Paleocene vertebrates. Intense prospecting of strata representing member 4 of the formation over the past two decades has resulted in recovery of over 70 specimens of eutherian mammals, representing 18 species. All specimens were recovered from member 4a and the lower part of member 4b, except an isolated tooth referred to Phenacodus cf. P. vortmani from member 4d in the uppermost part of the formation. Three taxa are new, the plesiadapid, Nannodectes lynasi, and two hyopsodontid condylarths, Promioclaenus walshi and Protoselene ashtoni. Also present are four species of Phenacodus, two species of Protictis, and single species representing Goleroconus, Mimotricentes, Lambertocyon, Ignacius, Paromomys, Bessoecetor, Thryptacodon, Dissacus, and a taeniodont. The mammalian fauna from member 4a and the lower part of member 4b is collectively referred to as the Goler Assemblage because taxa recovered from sites throughout this 500 m stratigraphic interval are too similar to subdivide into discrete biostratigraphic units. Based on comparison to faunas from well-known Tiffanian sites in the Western Interior, the Goler Assemblage is probably middle Tiffanian (Ti3-Ti4a), although a Ti5a age is also possible. The Goler Assemblage exhibits significant endemism as 40% of its taxa are not reported elsewhere and only four of 18 Goler Assemblage eutherians can be confidently referred to known species. Comparison to seven Ti3-Ti4a aged sites from the Western Interior indicates that the Goler Assemblage has a closer affinity to more southern faunas (southern Wyoming, Colorado, and Texas), than northern faunas (northern Wyoming, North Dakota, and western Canada), and is most similar to the mammalian assemblage from the Ledge Locality in the Bison Basin of southern Wyoming. Presence of late Paleocene-early Eocene marine strata in the uppermost member of the Goler Formation indicates that the Goler Basin was probably adjacent to the Pacific Ocean during most of its existence. Also, significant distances and one or more paleodrainage divides separated the Goler Basin from Western Interior basins, factors that limited the dispersal of mammals between the West Coast and the continental interior and contributed to the formation of a discrete faunal province on the West Coast of North America during the late Paleocene.