Pearce-Sellards Series

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    Early Tertiary Vertebrate Faunas, Trans-Pecos Texas: Ceratomorpha Less Amynodontidae
    (Texas Memorial Museum, The University of Texas at Austin, 1984-12-07) Wilson, John Andrew; Schiebout, Judith A.
    Ceratomorph remains found in Eocene and Oligocene deposits of Trans-Pecos Texas are herein described, except for the amynodonts which were described in a previous paper. Hyracodon primus, Hyracodon petersoni, and Colodon stovalli n. sp. are described from well-preserved material; Hyrachyus and Dilophodon are not so well represented. Triplopus, Caenopus, and Trigonias are questionably identified and a skull fragment is provisionally referred to Toxotherium. Changes in faunal lists of Trans-Pecos local faunas are reported. Generalized stratigraphic sections of the Vieja and Agua Fria-Green Valley areas are provided.
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    Butterflies from the Middle Eocene: The Earliest Occurrence of Fossil Papilionoidea (Lepidoptera)
    (Texas Memorial Museum, The University of Texas at Austin, 1978) Durden, Christopher J.; Rose, Hugh
    Three fossil butterflies recently collected from the Green River Shale of Colorado extend the known range of Rhopalocera eight to ten million years back, to 48 Ma. Praepapilio Colorado n. g., n. sp., and P. gracilis n. sp. are primitive Papilionidae related to the modern Baronia brevicornis Salvin, but they require a new subfamily, Praepapilioninae. Riodinella nympha n. g., n. sp. is a primitive member of the Lycaenidae, related to modern Ancyluris, Riodina, and Rhetus, in the tribe Riodinidi.
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    New Brazilian Forms of Hyla
    (Texas Memorial Museum, The University of Texas at Austin, 1968-04) Lutz, Bertha
    The author describes three new species and three new subspecies of Hyla, found during her work toward a monograph of the species of Hyla which occur in Brazil. The new species are: Hyla adenoderma from Rondonia territory; H. longilinea from the high mountains at Pogos de Caldas, Minas Gerais; and H. egleri from Belem do Para. The last-named is a northern representative of the forms belonging to the group of H. catharinae from the southern and southeastern serras. The new subspecies are: H. duartei caldarum from Pogos de Caldas; H. raddiana joaquini from the highest and most southern part of the state of Santa Catarina; and H. rubra orientalis from the Atlantic coastal area of Brazil.
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    Prolapsus, A Large Sciuravid Rodent: And New Eomyids From the Late Eocene of Trans-Pecos Texas
    (Texas Memorial Museum, The University of Texas at Austin, 1991-09) Wilson, John Andrew; Runkel, Anthony C.
    The questionably hystricognathous and hystricomorphous rodent Prolapsus is assigned, on the basis of its dental characters, to the Family Sciuravidae. The complete dentition of Prolapsus sibilamoris is now known but P. junctionis is still represented by isolated teeth only. Prolapsus sp. of Wood(1973) is now identified as a species of Pauronys. Prolapsus is found in the early Uintan Whistler Squat local fauna and late Uintan Serendipity local fauna at several localities in Trans-Pecos Texas and is closely related to a new emoyid genus, Aguafriamys, here described, that occurs in sediments of Duchesnean age in the same area. If Prolapsus is interpreted as being truly hystricognathous it follows that this character has evolved more than once. A new species of Yoderimys is described from the Coffee Cup local fauna Chadronian age.
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    Redescription of Schizomus crassicaudatus (Pickard-Cambridge) and Diagnoses of Hubbardia cook, Stenochrus chamberlin, and Sotanostenochrus new genus, with Description of a New Species of Hubbardia from California (Arachnida: Schizomida: Hubbardiidae)
    (Texas Memorial Museum, The University of Texas at Austin, 1991-02) Reddell, James R.; Cokendolpher, James C.
    Schizomus crassicaudatus from Sri Lanka is redescribed from the type series, and lectotypes of Nyctalops crassicaudata and N. Tenuicaudata are designed. Hubbardia Cook, previously considered a synonym of Schizomus Cook, is considered valid and rediagnosed to include species from California and Arizona. The family Hubbardiidae Cook has priority and therefore is used rather than Schizomidae Hansen and Sorensen. Additional descriptive notes and records are provided and a lectotypes is designated for Hubbardia pentapeltis Cook. Hubbardia idria new species is described from San Benito County, California. Additional records are included for H. briggsi. A key for identification of males of Hubbardia is presented. The native (introduced elsewhere) North and Central American genus Stenochrus Chamberlin is rediagnosed for most species of the Schizomus mexicanus, pecki, and goodnightorum groups. Sotanostenochrus, new genus, is described for Schizomus mitchelli Rowland, and Schizomus cookei Rowland and is known only from caves in San Luis Potosi and Tamaulipas, Mexico.
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    Coryphodon (Mammalia, Pantodonta) From the Hannold Hill Formation, Eocene of Trans-Pecos Texas
    (Texas Memorial Museum, The University of Texas at Austin, 1989-01) Spencer G., Lucas
    Speciments of the large extinct pantodont Coryphodon from the Hannold Hill Formation, Brewster County, Texas belong to single species, Coryphodon molestus. A sample of Coryphodon molestus from one locality in the Hannold Hill Formations consists of three adults and at least one juvenille. The sample aids in documenting sexual dimorphism in Coryphodon molestus and provides circumstantial evidence of gregarious behavior in that species. The presence of Coyphodon molestus in the Hannold Hill Formation indicates a late Gray Bull through Lost Cabin (Wasatchian) age. This is consistent with assignment of a late Gray Bull or Lysite age to the entire Hannold Hill vertebrate fauna.
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    A Mid-Pleistocene (Irvingtonian) Herpetofauna From a Cave in South Central Texas
    (Texas Memorial Museum, The University of Texas at Austin, 1987-03) Holman, J. Alan; Winkler, Alisa J.
    At least 24 species of amphibians and reptiles are identified from the mid-Pleistocene Fyllan Cave Fauna. Travis County, Texas. This is the largest mid-Pleistocene herpetofauna known from the Texas, and one of the largest mid-Pleistocene herpetofaunas known from the United States. Only the large terrestrial tortoise represent an extinct species, but three extralimital forms indicate that winters in the area were milder than they are today. The fossils appear to have been subjected to considerable post-mortem- transport
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    Carrolla craddocki: A New Genus and Species of Microsaur from the Lower Permian of Texas
    (Texas Memorial Museum, The University of Texas at Austin, 1986-04) Langston Jr., Wann; Olson, E.C.
    The specimen, comprising a skull and jaws, is assigned to the suborder Microbrachomorpha and tentatively to the family Brachystelechidae on the basis of the structure of the temporal and occipital regions. It is unique among known microsaurs in the possession of marginal teeth with long slender hollow bases and bifurcated crowns and the apparent absence of palatal dentition. Carrolla craddocki, new genus and species, from Lower Permian (Wolfcampian) Belle Plains Formation in Archer County, Texas, is described and figured. If correctly assigned to the Brachystelechidae, Carrolla is the first record of the family in North America, but it was probably not equivalent ecologically to the roughly contemporaneous Brachystelechus of Europe. Carrolla is believed to have been a burrower in hard soils. Its diet may have comprised soft-bodied subterranean invertebrates, but the functional significance which developed cryptic behavior under competitive pressures from surface dwelling reptiles in an increasingly harsh Early Permian environment in North America.
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    Evolution of the Genus Holmesina (Pampatheriidae, Mammalia) in Florida, with Remarks on Taxonomy and Distribution
    (Texas Memorial Museum, The University of Texas at Austin, 1983-05) Edmund, A. Gordon
    A large series of specimens of pampatheres has been found in Florida, covering approximately two million years from their emigration from South America to their late Pleistocene extinction. During this period, there was little morphological change, although the limb bones elongated by about 50%. The area of individual osteoderms, which is indicative of the surface area of the animal, increased, as expected, by the square of that amount, i.e. 2.2 times.
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    Paleoecological Implications of a Holocene Fossil Assemblage: Lower Rio Grande, Cameron County, Texas
    (Texas Memorial Museum, The University of Texas at Austin, 1985-08) Neck, Raymond W.
    A Late Holocene fossil site from extreme southern Texas consists of invertebrate remains dominated by terrestrial, freshwater and brackish water mollusks. Sparse plant remains were recovered. Analysis of the origin of this heterogeneous fossil biota indicates that a brackish marsh was periodically inundated by freshwater runoff. The presence of a marsh clam not known living in the area today is significant; the fossil site is reconstructed to have been a brackish marsh habitat at elevation of 3.6 meters above mean sea level. A brackish marsh at this elevation may indicate high sea levels, although existence of nontidal brackish marshes are known from the lower Texas coast. Changes in river flow and seasonal distribution of local precipitation, and/or regional runoff, are postulated to explain the existence of a saline marsh in an area where this biotype is extremely rare today.
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    A Checklist and Bibliography of the Iapygoidea (Insecta: Diplura) of South America
    (Texas Memorial Museum, The University of Texas at Austin, 1985-09) Reddell, James R.
    Complete records, synonymies, and bibliographic citations are given for the 61 species and seven varieties of iapygoid diplurans described from South America. Also included are all published records for species determined only to the generic level. The South American fauna includes representatives of the families lapygidae, Dinjapygidae, and Parajapygidae. The original spellings of the genus Iapyx and the family-group name Iapygidae are used in preference to Japyx and Japygidae to comply with the Rule of Priority. Typhlolabia Scudder is resurrected to include the following species previously included in Teljapyx Silvestri: T. bidentatus (Schaffer), T. costala (Gonzalez and Smith), T. hirsuta (Gonzalez and Smith), T. larva (Philippi) (type-species), T. megalocera (Silvestri), T. profunda (Smith), T. riestrae (Silvestri), and T. talcae (Smith).
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    The Armor of Fossil Giant Armadillos (Pampatheriidae, Xenarthra, Mammalia)
    (Texas Memorial Museum, The University of Texas at Austin, 1985-06) Edmund, A. Gordon
    Fossil giant armadillos are protected by armor consisting of about 800 osteoderms covering the body, head, tail, legs and feet. The body armor is composed of an anterior (pectoral) buckler and a posterior (pelvic) buckler, separated by three transverse bands of imbricating plates. In one phyletic line the pelvic osteoderms are rectangular, rather than polygonal. The surficial ornamentation of the keratin-bearing portion of the osteoderms appears to be conservative and taxonomically characteristic in at least two major phyletic lineages. These characters will be used in a future taxonomic revision.
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    Mammals of the Coffee Ranch Local Fauna Hemphilian of Texas
    (Texas Memorial Museum, The University of Texas at Austin, 1983-09) Dalquest, Walter W.
    The Coffee Ranch local fauna is the type of the Hemphillian Land Mammal Age. Fossils from the Coffee Ranch quarry have been known since 1930 and have been the basis for numerous publications, but no complete account of the fauna has been given. The present report is based on more than one thousand specimens gathered over twenty-two years, including both microvertebrates and large mammals. Thirty-eight taxa are listed, of which the following are described as new: Scalopus (Hesperoscalops) ruficervus, Eptesicus hemphillensis, Ccmancheomys n. gen., Comancheomys rogersi, Progeomys n. gen., Progeomys sulcatus, Calomys (Bensonomys) coffeyi, Neotoma (Paraneotoma) minutus. The Coffee Ranch local fauna is thought to be of middle Hemphillian age, younger than the Higgins and similarly aged local faunas but older than the Yepomera and Ocote local faunas of Mexico.
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    A Checklist and Bibliography of the Japygoidea (Insecta: Diplura) of North America, Central America, and the West Indies
    (Texas Memorial Museum, The University of Texas at Austin, 1983-04) Reddell, James
    The japygoid fauna of North America, Central America, and the West Indies includes one fossil and 103 extant species and four "varieties." Complete synonymies, bibliographic citations, and records are included for all species. The presumed type-locality and a summary of ecological data are given for each taxon. In addition, records and references are provided for all undescribed or undetermined specimens reported in the literature.
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    Occurrence of Exotic Fishes in Texas Waters
    (Texas Memorial Museum, The University of Texas at Austin, 1982-12) Hubbs, Clark
    Many of the fishes currently inhabiting Texas freshwaters are not native to that location. This influx of exotic fishes is equivalent to about 20 percent of the original freshwater fish fauna.
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    Fossil Mammals from the Lower Buck Hill Group, Eocene of Trans-Pecos Texas: Marsupicarnivora, Primates, Taeniodonta, Condylarthra, Bunodont Artiodactyla, and Dinocerata
    (Texas Memorial Museum, The University of Texas at Austin, 1982-10) West, Robert M.
    Two assemblages of fossil mammals from the lower part of the Eocene Buck Hill Group, Brewster County, Texas, contain two species of marsupials, five of primates, two of condylarths, one taeniodont, six of bunodont artiodactyls, and one uintathere. Most of these are specifically identical to organisms from the Bridgerian and Uintan faunas of the Rocky Mountain region of Utah and Wyoming. Relatively few are closely related to species of the same age from Southern California. One artiodactyl represents a new genus. The age of the stratigraphically lower assemblage, part of the Whistler Squat local fauna, is late Bridgerian or early Uintan, while that of the higher assemblage, from the Serendipity local fauna, is clearly Uintan.
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    Early Tertiary Vertebrate Faunas Trans-Pecos Texas: Amynodontidae
    (Texas Memorial Museum, The University of Texas at Austin, 1981-06) Wilson, John Andrew; Schiebout, Judith A.
    Skulls, lower jaws and limb bones, identified as Amynodon advenus, were recovered from a quarry and from other localities at the same stratigraphic level in deposits of early Uintan age that contain the Whistler Squat local fauna in West Texas. Forms with large canines and long post-canine diastemas are identified as males, whereas forms with smaller canines and shorter diastemas are identified as females. A new species of Metamynodon from the Myton Uintan is based on a massive lower jaw. Amynodontopsis bodei is found in the Skyline and Cotter channels of latest Eocene and earliest Oligocene. Metamynodon chadronensis from the Porvenir local fauna of the Vieja area is described.
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    First Cretaceous Specimens of the Beryciform Fish Hoplopteryx from North America and their Bearing on Acanthopterygian Evolution
    (Texas Memorial Museum, The University of Texas at Austin, 1982-05) Bardack, David; Teller-Marshall, Susan
    Hoplopteryx lewesiensis (Beryciformes: Trachichthyidae) is reported from North America for the first time. More than a dozen individuals, including several complete fishes, expand the geographic range of this Late Cretaceous fish. This acanthopterygian, characterized by an unchanging morphology across a long geologic interval and broad geographic area, indicates that the epeiric seas of the northern seaway were relatively homogeneous environments. It appears also that the beryciforms as well as the perciforms developed outside of these seas.
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    Late Hemphilian Mammals of the Ocote Local Fauna, Guanajuato, Mexico
    (Texas Memorial Museum, The University of Texas at Austin, 1980-02) Dalquest, Walter W.; Mooser, Osawaldo
    The Ocote local fauna is described from several thousand fossils, mostly isolated teeth, of large mammals, obtained from sediments near the village of Los Rodriguez, District of San Miguel de Allende, northeast of the city of San Miguel de Allende, Guanajuato, Mexico. Teleoceras ocotensis, Desrnathyus brachydontus, and Palaeolama guanajuatensis are described as new, the name Paenemarmota Mexicana (Wilson) is revived, and descriptions of the dentitions of six species of horses are given. It is suggested that the Pliocene evolution of Desrnathyus and Palaeolama took place on the Mexican Plateau. The evolutionary stage of the Ocote mammals suggests that the fauna is of late Hemphillian age.
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    Early Tertiary Vertebrate Faunas Big Bend Area Trans-Pecos Texas: Simidectes (Mammalia insectivora)
    (Texas Memorial Museum, The University of Texas at Austin, 1979) Gustafon, Eric Paul
    Several specimens from the Buck Hill Group, Agua Fria area, Texas, represent Simidectes magnus, a species previously reported only from the Uinta Formation of Utah. Statistics of known specimens of Simidectes are inadequate to demonstrate the existence of more than one species in the Utah and Texas sections; S. medius may be a junior synonym of S. magnus. In the lower part of the'Section at Agua Fria, Simidectes occurs in the Whistler Squat local fauna of late Bridgerian or early Uintan age; in the upper part of the section it is found in association with an early Hyaenodon and the adapid primate Mahgarita stevensi.