Browsing by Subject "new species"
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Item A Dasyleptid from the Permian of Kansas, Lepidodasypus Sharovi N. Gen., N. SP. (Insecta: Thysanura: Monura)(Texas Memorial Museum, The University of Texas at Austin, 1975-05) Durden, Christopher J.Lepidodasypus sharovi n. gen., n. sp. is distinguished from previously described species of Dasyleptus by the fine vestiture of scales and hairs, by the heavier pigmentation of the tergites, and by the shorter first maxillary palpi. Preservation of the unique type specimen shows well the presence of segmented abdominal legs, and their posterior specialization to form an ovipositor of ovigerous legs. This is the first record of a dasyleptid monuran from North America and is the oldest representative of the order Thysanura on this continent.Item Descriptions of Some Fossil Vertebrates Found in Texas(University of Texas at Austin, 1916-12-20) Hay, Oliver PerryItem Eocene Rodents, Pruett Formation, Southwest Texas; Their Pertinence to the Origin of the South African Caviomorpha(Texas Memorial Museum, The University of Texas at Austin, 1973-11) Wood, Albert E.The rodents from three localities in the Pruett Formation of the Buck Hill Volcanic Group from the Big Bend region of Texas are described. Included are the paramyids Thishemys plicatus, Microparamys minutus, Lophiparamys sp. indet., and at least one indeterminate paramyid; new species, M. boskeyi, of the cylindro- dont genus Mysops and hystricognathous rodent of uncertain familial position, Prolapsus, new genus. Prolapsus is represented by P. sibilatoris, new species; P. junctionis, new species; and third, smaller but indeterminate species. The rodents both individually and collectively strongly support Middle Eocene (Bridgeran) age for the lower part of the Pruett Formation. Prolapsus is the first fully hystricognathous rodent to be reported from the Eocene of any part of the world. It is already too advanced in the characters of the cheek teeth to have been ancestral to the South American Caviomorpha. The incisor enamel is of the pauciserial type, characteristic of the primitive Eocene rodents, the families Paramyidae and Sciuravidae, and the mid-Eocene cylindrodont Mysops. Although the incisor enamel and the cheek teeth show that Prolapsus could not have been caviomorph, it seems probable that the Caviomorpha were derived from Middle American Eocene ancestors of the same general stock as Prolapsus. The presence of Prolapsus in North America is weighty argument against late Eocene trans-Atlantic migration of rodents. Unknown but probably related forms, from southwest Asia, were presumably ancestral to the African Phiomorpha.Item Geographic Variation in Brazillian Species of Hyla(Texas Memorial Museum, The University of Texas at Austin, 1968-10) Lutz, BerthaUntil now, practically all Brazilian species of Hyla have been described or discussed exclusively under the nominative form, without regard for geographical variation. The subspecies is almost unknown in the systematics of Brazilian frogs. This paper is concerned with local variation in two difficult groups, that of Hyla catharinae and of the species Hyla polytaenia. Variation becomes apparent on extension of the known distribution, going from altitudinal forms to subspecies in isolated or peripheral parts of the range. Altitudinal variation was first pointed out by the author (1952) for Hyla circumdata Cope when specimens of this montane coastal species were collected above 1,800 meters on the Itatiaia Mountains. They were robust, and lacking the specific pattern of dark violet circles on a lighter blue-violet background on thigh parts which were concealed in repose. These colors were substituted by a uniform purplish-black, or slate colored surface. A new subspecies was not set up because some robust specimens from slightly lower elevations at Itatiaia, and elsewhere, showed vestiges of the circles.Item Letter to A.J. Rowell from Josephine Casey on 1967-12-01(1967-12-01) Casey, JosephineItem Letter to B.W. Blanpied from H.B. Stenzel on 1939-06-15(1939-06-15) Stenzel, Henryk B.Item Letter to Curt Teichert from H.B. Stenzel on 1943-08-30(1943-08-30) Stenzel, Henryk B.Item Letter to Ellis W. Shuler from H.B. Stenzel on 1941-03-11(1941-03-11) Stenzel, Henryk B.Item Letter to H. Murawski from H.B. Stenzel on 1964-09-02(1964-09-02) Stenzel, H.B.Item Letter to H. Murawski from H.B. Stenzel on 1964-10-30(1964-10-30) Stenzel, H.B.Item Letter to H.B. Stenzel from C.E. Needham on 1940-12-09(1940-12-09) Needham, C.E.Item Letter to H.B. Stenzel from C.W. Wright on 1951-09-16(1951-09-16) Wright, C.W.Item Letter to H.B. Stenzel from Carlo Sturani on 1958-01-10(1958-01-10) Sturani, CarloItem Letter to H.B. Stenzel from Darcy Closs on 1960-06-20(1960-06-20) Closs, DarcyItem Letter to H.B. Stenzel from F.W. Rolshausen on 1941-01-29(1941-01-29) Rolshausen, F.W.Item Letter to H.B. Stenzel from H. Murawski on 1964-09-15(1964-09-15) Murawski, H.Item Letter to H.B. Stenzel from Howard A. Meyerhoff on 1941-03-25(1941-03-25) Meyerhoff, Howard A.Item Letter to H.B. Stenzel from Hubert G. Schenck on 1940-12-16(1940-12-16) Schenck, Hubert G.Item Letter to H.B. Stenzel from John E. Barnett on 1954-04-21(1954-04-21) Barnett, John E.Item Letter to H.B. Stenzel from Joseph K. Roberts on 1940-12-09(1940-12-09) Roberts, Joseph K.
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