Browsing by Author "Gawne, Constance Elaine."
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Item The genus Proterix (Insectivora, Erinaceidae) of the Upper Oligocene of North America. American Museum novitates ; no. 2315(New York, N.Y. : American Museum of Natural History, 1968) Gawne, Constance Elaine.Item Lagomorphs from the Zia Sand Miocene of New Mexico. American Museum novitates ; no. 2608(New York, N.Y. : American Museum of Natural History, 1976) Gawne, Constance Elaine."Lagomorphs of ?latest Arikareean-medial Hemingfordian faunas from the Zia Sand include at least two archaeolagine leporids and an ochotonid. The latest Arikareean or earliest Hemingfordian Standing rock local fauna includes Archaeolagus cf. macrocephalus, tentatively referred to A. macrocephalus, of the early Hemingfordian of South Dakota, on morphology of lower teeth; it resembles Hypolagus in size and crenulation of hypostriae, but differs sufficiently in morphology of anterior premolars to make close relationship unlikely. Limb structure, although far advanced over Palaeolagus, suggests less cursorial locomotion than Sylvilagus or Oryctolagus. Archaeolagus sp., of the medial Hemingfordian Blick local fauna, appears less advanced than A. cf. macrocephalus in structure of upper cheek teeth. It is similar to some specimens from medial Hemingfordian rocks of Nebraska, and may also be related to Panolax of the early Pliocene of New Mexico. Fragmentary specimens from the Jeep and Mesa Prospect local faunas can be identified only as Archaeolagus incertae sedis. Oreolagus cf. nebrascensis, of the Blick local fauna, is represented by a fragmentary lower jaw and associated partial innominate bone. The latter shows some resemblance to Prolagus in form of a acetabulum and iliac blade, but also resembles Palaeolagus, especially in form of the large, high iliac tubercle, suggesting retention of primitive lagomorph morphology and relatively unspecialized mode of locomotion"--P. [1].Item Rodents from the Zia Sand Miocene of New Mexico. American Museum novitates ; no. 2586(New York, N.Y. : American Museum of Natural History, 1975) Gawne, Constance Elaine."Rodents from the ?latest Arikareean-medial Hemingfordian faunas from the Zia Sand include one mylagaulid and several geomyoids. The Standing Rock local fauna is considered earliest Hemingfordian or latest Arikareean; its three geomyoid rodents, Proheteromys cejanus, new species, P. aff. floridanus (Heteromyinae), and Ziamys tedfordi, new genus and species (Geomyinae) are consistent with such an age but have little value in detailed correlation. Ziamys combines geomyine palatal and rostral structure with pleurolicine-like cheek teeth, which contrast strongly with those of Dikkomys. Ziamys indicates that the Geomyinae evolved from among the Pleurolicinae, but also resembles species of Gregorymys sufficiently to suggest an origin near the point of division of Pleurolicinae and Entoptychinae. The Blick local fauna of medial Hemingfordian age includes a pleurolicine most nearly resembling the Arikareean Pleurolicus sulcifrons. The specimen includes dP[superscript 4] [subscript 4], not known for Pleurolicus; these teeth resemble those of entoptychines. A similar dP[superscript 4] has been described from the Hemingfordian Quarry A, Martin Canyon local fauna. A heteromyid species is represented by a specimen resembling Proheteromys and another resembling Mookomys; it may lie near the point of origin of the perognathinae. Mesogalus aff. vetus, from Jeep Quarry, is morphologically intermediate between M. praecursor from the marsland Formation and M. vetus of the Sheep Creek local fauna, and supports an age estimate of late medial Hemingfordian for the Jeep local fauna"--P. [1].