Browsing by Author "Rosenberg, Herbert I."
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Item Open Access A detailed description of newly-discovered remains of Maiasaura peeblesorum (Reptila: ornithischia) and a revised diagnosis of the genus(1995) Trexler, David Lee; Rosenberg, Herbert I.A newly-discovered hadrosaur from the Two Medicine Formation, Teton County, Montana, is described in detail. The description of the skull is the most complete of any produced for a hadrosaur, and the postcranial skeleton provides the first information on an almost complete adult Maiasaura. Information resulting from this detailed examination is used as a base for comparisons with other specimens and reports in the literature. Although the new specimen differs in detail from the holotype, it (OTM F138) was determined to be Maiasaura peeblesorum. This classification led to a revision of the diagnosis of Maiasaura. Several previously unrecognized, taxonomically important characters were identified. The comparisons revealed discrepancies concerning both terminology and interpretation of certain features of the hadrosaur skeleton. These are discussed. In addition, a formula applicable to most hadrosaur specimens was derived for estimating total animal length from the length of the femur.Item Embargo A functional anatomical study of lizard respiration(1975) Hadden, Heather Dawn; Rosenberg, Herbert I.Item Embargo Anatomy of the feeding apparatus of six species in the tribe Anatini (Aves: Anatidae)(1981) Higgins, Sheila Lynn; Rosenberg, Herbert I.Item Open Access Biomechanics of the prey capture system in the red-sided garter snake, thamnophis sirtalis parietalis(1989) Young, Bruce Arthur; Rosenberg, Herbert I.Item Open Access Development of the Subdigital Adhesive Pads of Ptyodactyhs guttatus (Reptilia: Gekkonidae)(John Wiley & Sons, Inc., 1992) Cavey, Michael J.; Rosenberg, Herbert I.; Russel, Anthony P.; Biological Sciences; Faculty of Science; University of CalgarySubdigital adhesive pads play an important role in the locomotion of many species of gekkonid lizards. These pads consist of integrated components derived from the epidermis, dermis, vascular system, subcuticular tendons, and phalanges. These components become intimately associated with each other during the developmental differentiation of the digits and the sequence of this integration is outlined herein in Ptyodactylus guttatus. The pads initially appear as paired swellings at the distal tips of the digits. Subsequently, a fan-like array of naked scansors develops on the ventral surface of each digit, at about the same time that scales differentiate over the surface of the foot as a whole. At the time of appearance of the naked scansors, the vascular sinus system of the pad also differentiates, along with subcuticular connective tissue specializations. At this stage the digits, along with the rest of the body, are clad in an embryonic periderm. Only after hatching and as the periderm is shed, do the epidermal setae and spines appear. The developmental sequence described here is consistent with predictions previously advanced about the evolutionary origin and elaboration of subdigital pads in gekkonid lizards. The paucity of available staged embryonic material leaves many questions unresolved.Item Embargo Fossil turtles from the Campanian stage of western North America(1972) Nicholls, Elizabeth L.; Rosenberg, Herbert I.Item Embargo The ecology and home range movements of Ambystoma Macrodactylum Krausei (Amphibia: Urodela)(1977) Sheppard, Robert Frank; Rosenberg, Herbert I.