DOCSLIB.ORG

Abstracts of the Society Of

Total Page：16

File Type：pdf, Size：1020Kb

Download full-text PDF Read full-text
Abstracts of the Society Of ABSTRACTS OF THE SOCIETY OF VERTEBRATE PALEONTOLOGY DECEMBER MEETING AT BOSTON MODERN TECHNIQUES IN THE STUDY OF TERTIARY CONTINENTAL SEDIMENTS BY JOHN CLARK Early stratigraphic work in Tertiary formations was limited to faunal correlation and brief, macroscopic description of the sediments. During the past 20 years, various students have developed special techniques which have yielded valuable results. Most useful petrologic data are: (1) Quartz-feldspar ratios; (2) nature, amount, and factors controlling the cementing material; (3) color, provided that the factors controlling it can be determined; (4) nature of the heavy minerals; (5) gradations in maximum grain size. Special methods of sampling are necessary in order to obtain uniform results. Paleogeographic interpretation must at all times accompany faunal and petro­ logic studies. Local variation in facies is so extreme that without determination of the environment of deposition, correlation and interpretation become impossible. FUNCTION OF THE FORELEG IN AMPHIBIAN;LOCOMOTION BY F. GAYNOR EVANS Experiments with Amblystoma opacum indicate that the forelegs play a more important role in normal locomotion than is usually believed. Animals with the hind legs immobilized still showed fairly good forward locomotion accomplished by pulling with the forelegs and lateral undulations of the body. With the posterior part of the body supported off the substratum locomotion approached the normal. Immobilization of the forelegs rendered forward movement almost impossible, while immobilizing both pairs of legs prevented it in spite of violent lateral un­ dulations of the body. In normal locomotion the propulsive phase in the forelegs consists of a pulling action, produced by flexion of the various segments of the leg, while extension occurs chiefly during the recovery phase when the foot is off the ground. Some extension also occurs at the end of the propulsive phase just before the foot leaves the sub­ stratum. Experiments with Triturus granulosus show the pulling power of the foreleg is greater than supposed. The carpal joints of the Caudata are syndesmoses with the entire region very flexible because of the elastic tissue between the bones. Flexion and extension occur chiefly at two places—(1) between the forearm bones and the proximal row of carpals and (2) between the distal row of carpals and the metacarpals. The same conditions were presumably true in the Stegocephalia. The antero-internal region of the palm is the chief weight-bearing part of the hand. This also seems to have been true in the Stegocephalia as in many cases the tracks of the manus are deepest in this region. RELATIONSHIPS OF THE TRIASSIC REPTILE TRILOPHOSAURUS BY JOSEPH T. GREGORY The University of Texas has obtained an articulated skeleton and numerous other specimens of Trilophosaurus buettneri Case from the Upper Triassic Dockum (1987) Downloaded from http://pubs.geoscienceworld.org/gsa/gsabulletin/article-pdf/52/12_2/1987/3431052/BUL52_12B-1987.pdf by guest on 29 September 2021 1988 ABSTRACTS OF THE SOCIETY OP VERTEBRATE PALEONTOLOGY formation in Howard County, Texas. Important morphological features of this reptile are: edentulous premaxillaries and symphysis of the lower jaws; an average of 14 transversely elongated, three-cusped, thecodont teeth on each maxillary and dentary; vertical tooth succession which progressed regularly from front to back of jaws; large laterally directed orbits; superior temporal fenestrae; elevated quadrate recurved at its upper end like that of Diadectes and chelonians; quadrate exposed on lateral surface of skull and supported throughout its length by the unfenestrated postorbital region; braincase unossified anterior to sella turcica; tubera and basipterygoid processes deep; 7 procoelous cervical vertebrae with paired hyposphenes; long cervical ribs; 17 amphiplatyan dorsal vertebrae with thin, crescentic intercentra and low neural spines; numerous abdominal ribs; two strong sacral vertebrae; a long tail with elongate procoelous vertebrae; girdles with expanded ventral elements; limb bones slender; humerus with expanded ends and twisted shaft; femur with strong internal trochanter; feet large, pentadactyl, lizardlike, with strong compressed claws; tarsus with navicular; fifth metatarsal “hooked”. Structure of vertebrae, girdles, and limbs suggests that the animal was quadrupedal and lizardlike in body form. Adults about 2 meters long. Numerous similarities between Trilophosaurus and the diapsid reptiles are due to parallel evolution from a common protorosaurian ancestor. Trilophosaurus is provisionally referred to the Protorosauria. FISHES FROM THE DEVONIAN OF ARIZONA BY L. HUSSAKOF During the past few years, Devonian fish remains have been discovered at several localities in Arizona. The present paper is the first systematic description of this material. The specimens consist of single plates of Arthrodira, most of them of small forms, ptyctodont dental elements, and teeth of Dipterus. The present study is based on a small collection of such material made by Mr. L. F. Brady of the Museum of Northern Arizona, from the Mt. Elden formation, near Flagstaff, Arizona. On the evidence of the fishes, the age of the fish-bearing strata of this formation appears to be early Upper Devonian. Among the Arthrodira studied are a few fragmentary plates of a Dinichthys of medium size, ornamented with small, occasionally stellate, tubercules; and a new species of Coccosteus, represented by isolated, single plates from different parts of the body. The ventral armor of this Coccosteus was reconstructed. It presents an unusual feature in having the posterior ventrolateral plates united medianly in almost a straight line, not by overlap flanges. Ptyctodont dental elements are comparatively numerous, most of them forms with a very narrow tritor preceded by a trenchant margin. A new species of Ptyctodus is described. NEW PYCNODONT FISH FROM THE UPPER CRETACEOUS OF ARKANSAS BY L. HUSSAKOF The species is described from two nearly complete mandibulars from the Marl- brook marl (Upper Cretaceous) of Arkansas. The principal teeth consist of a single series of narrow elliptical teeth, characteristic of the genus Anomoeodus. The two specimens are both right mandibulars, from two different fishes. They show that variation occurs within the same species in the row of very small teeth in Downloaded from http://pubs.geoscienceworld.org/gsa/gsabulletin/article-pdf/52/12_2/1987/3431052/BUL52_12B-1987.pdf by guest on 29 September 2021 ABSTRACTS 1989 the symphyseal line: in one specimen there is a single row of very small teeth; in the other there is, beside this row, a second, more irregular series of somewhat larger teeth. This pycnodont occurs along with shark teeth of various species, and teleostean bones and teeth, among the latter being large, slender laniary teeth of Enchodus. This fauna of large fishes indicates open-sea conditions; and the presence of two teeth of a trigger fish (Balistidae) indicates a warm sea as the habitat of these pycnodont fishes. Specimens in the possession of their collector, Mr. C. M. Barber, Hot Springs, Arkansas. PALEOPSEPHURUS WILSONI, A NEW POLYODONTID FISH FROM THE UPPER CRETACEOUS OF MONTANA, WITH A DISCUSSION OF ALLIED FISH, LIVING AND FOSSIL BY ARCHIE MACALPIN The osteology of P. Wilsoni, n. gen., n. sp. is described and figured. Many com­ parisons are made between its structures and the supposed homologues of modem and fossil fish, especially of living paddlefish and sturgeons and of Crossopholis magnicaudatus (the only other known fossil paddlefish) from the Eocene. The material from the University of Michigan collections consists of three close-lying individuals showing (1) a well-preserved head with jaws, branchial and hyoid arches, pectoral girdle, pectoral fins, and some minute denticles; (2) part of a caudal region; (3) part of a shoulder girdle and pectoral fin. The species has a long rostrum, fenestrated cranial roof skeleton with numerous occipital plates, and a strong parasphenoid. The mouth apparatus consists of a sturdy, posteriorly directed hyomandibular, a pterygoid with an ectopterygoid process meeting a similar process from the maxillary, a quadratojugal, a maxillary and a dentary joining anteriorly with their fellows, a prearticular, and possibly several thin palatines. The strong dermal shoulder girdle has an interclavicle. Pectoral fin rays are distally segmented, not dichotomous. The trunk is covered with spinous denticles, 0.20 cm to 0.25 cm long, not in contact. Caudal fulcra and caudal oat­ shaped scutes are present. A macroscopic comparison of polyodontid squamation is made. Special attention is given to rostral and body sizes and jaw and occipital musculature with reference to feeding habits. Several undescribed features of Polyodon and Psephurus are treated. Among the suggestions offered are that (1) recent polyodontids have evolved from a line of more highly ossified ancestors, probably through some unknown palaeoniscid; (2) there is a quadratojugal in Paleopsephurus, Psephurus, and some sturgeons that appears to be homologous to that bone so called in the rhipidistians and lower Palaeoniscidae; (3) Pholidurus disjectus be removed from the family Polyodontidae; (4) the mouth of P. Wilsoni was protrusible; and (5) the length of the rostrum in comparison to the total body length exhibited by modern paddlefish had already been attained in the family by Upper Cretaceous time. ANALYSIS OF MBRYCOIDODON SKULLS BY FRED B PHLEGER, JR. One hundred
Load more

Recommended publications
  • Species and Subject Index*
    Species and subject index* 12SrDNA(mitochondrialgene) 141-144 life history 324-328, 331-332, 348-353 Acipenser gueldenstaedtii (Russian sturgeon) I6S rDNA(mitochondrial gene) 141-144 in MerrimackRiver 324-325 208, 220 I8SrDNA(nucleargene) 141-142, 146 migration323-325,328-330,349, in the Caspian Sea 209, 214 Acipenser 351-353 in the Danube River 185,193, 208 biogeography 41, 43, 128, 158, 169, palatquadrate shape 47 fishery 193,210,214 174 inthe PeeDeeRiver 323, 330 reproduction 214–215 in the Caspian Sea 215-216 phylogeny 45 status 203, 206 feedingadaptations 119 population size321-323, 330 taxonomy 158 fossil forms 174 in the Potomac River 322 in the Volga River 209, 214–215 locomotion adaptation 121 predation on 331 Acipenser kikuchii (=A. sinensis), taxonomy molecular phylogeny 147-148 quadratojugal bone 47 159 molecular variation in 159 reproduction 324-327, 352-353 Acipenser medirostris (green sturgeon) morphological characters 78, 81, 83, in the Saint John River 322, 324-325, fishery 412 86-7.89-91.93.95-6,99, 101, 104, 331 spawning rivers169 106-7,114-6 inthe Santee-Cooper River323-324 systematics 41 osteological methods 77 in the Savannah River 322-324, 330 taxonomy158 -159 phylogeny 43, 64, 116, 128, 145, spawning 324-326, 328-331, 350, 352 in the Tumnin River 158 147-149, 171, 180 status 319,322,356 Acipensermikadoi (Sakhalin sturgeon) 406 polyploidy in 136 stocking 323 in the Amur River 231–232 range31 inthe SusquehannaRiver 322 spawningrivers 169 rostralexpansion 120 taxonomy 159 systematics41 speciation 128, 148 Acipenser dabryanus (Dabry’s sturgeon) taxonomy 158 systematics 26, 39, 41-44, 147 artificial reproduction 262 Acipenser multiscutatus (=A.
    [Show full text]
  • Copyrighted Material
    06_250317 part1-3.qxd 12/13/05 7:32 PM Page 15 Phylum Chordata Chordates are placed in the superphylum Deuterostomia. The possible rela- tionships of the chordates and deuterostomes to other metazoans are dis- cussed in Halanych (2004). He restricts the taxon of deuterostomes to the chordates and their proposed immediate sister group, a taxon comprising the hemichordates, echinoderms, and the wormlike Xenoturbella. The phylum Chordata has been used by most recent workers to encompass members of the subphyla Urochordata (tunicates or sea-squirts), Cephalochordata (lancelets), and Craniata (fishes, amphibians, reptiles, birds, and mammals). The Cephalochordata and Craniata form a mono- phyletic group (e.g., Cameron et al., 2000; Halanych, 2004). Much disagree- ment exists concerning the interrelationships and classification of the Chordata, and the inclusion of the urochordates as sister to the cephalochor- dates and craniates is not as broadly held as the sister-group relationship of cephalochordates and craniates (Halanych, 2004). Many excitingCOPYRIGHTED fossil finds in recent years MATERIAL reveal what the first fishes may have looked like, and these finds push the fossil record of fishes back into the early Cambrian, far further back than previously known. There is still much difference of opinion on the phylogenetic position of these new Cambrian species, and many new discoveries and changes in early fish systematics may be expected over the next decade. As noted by Halanych (2004), D.-G. (D.) Shu and collaborators have discovered fossil ascidians (e.g., Cheungkongella), cephalochordate-like yunnanozoans (Haikouella and Yunnanozoon), and jaw- less craniates (Myllokunmingia, and its junior synonym Haikouichthys) over the 15 06_250317 part1-3.qxd 12/13/05 7:32 PM Page 16 16 Fishes of the World last few years that push the origins of these three major taxa at least into the Lower Cambrian (approximately 530–540 million years ago).
    [Show full text]
  • Family-Group Names of Fossil Fishes
    European Journal of Taxonomy 466: 1–167 ISSN 2118-9773 https://doi.org/10.5852/ejt.2018.466 www.europeanjournaloftaxonomy.eu 2018 · Van der Laan R. This work is licensed under a Creative Commons Attribution 3.0 License. Monograph urn:lsid:zoobank.org:pub:1F74D019-D13C-426F-835A-24A9A1126C55 Family-group names of fossil fishes Richard VAN DER LAAN Grasmeent 80, 1357JJ Almere, The Netherlands. Email: [email protected] urn:lsid:zoobank.org:author:55EA63EE-63FD-49E6-A216-A6D2BEB91B82 Abstract. The family-group names of animals (superfamily, family, subfamily, supertribe, tribe and subtribe) are regulated by the International Code of Zoological Nomenclature. Particularly, the family names are very important, because they are among the most widely used of all technical animal names. A uniform name and spelling are essential for the location of information. To facilitate this, a list of family- group names for fossil fishes has been compiled. I use the concept ‘Fishes’ in the usual sense, i.e., starting with the Agnatha up to the †Osteolepidiformes. All the family-group names proposed for fossil fishes found to date are listed, together with their author(s) and year of publication. The main goal of the list is to contribute to the usage of the correct family-group names for fossil fishes with a uniform spelling and to list the author(s) and date of those names. No valid family-group name description could be located for the following family-group names currently in usage: †Brindabellaspidae, †Diabolepididae, †Dorsetichthyidae, †Erichalcidae, †Holodipteridae, †Kentuckiidae, †Lepidaspididae, †Loganelliidae and †Pituriaspididae. Keywords. Nomenclature, ICZN, Vertebrata, Agnatha, Gnathostomata.
    [Show full text]
  • The Taphonomy, Paleoecology, and Depositional Environment Of
    W&M ScholarWorks Undergraduate Honors Theses Theses, Dissertations, & Master Projects 5-2011 The Taphonomy, Paleoecology, and Depositional Environment of Vertebrate Microfossil Bonebeds from the Late Cretaceous Hell Creek Formation in Garfield County, Montana Sean Michael Moran College of William and Mary Follow this and additional works at: https://scholarworks.wm.edu/honorstheses Part of the Geology Commons Recommended Citation Moran, Sean Michael, "The Taphonomy, Paleoecology, and Depositional Environment of Vertebrate Microfossil Bonebeds from the Late Cretaceous Hell Creek Formation in Garfield County, Montana" (2011). Undergraduate Honors Theses. Paper 419. https://scholarworks.wm.edu/honorstheses/419 This Honors Thesis is brought to you for free and open access by the Theses, Dissertations, & Master Projects at W&M ScholarWorks. It has been accepted for inclusion in Undergraduate Honors Theses by an authorized administrator of W&M ScholarWorks. For more information, please contact [email protected]. The Taphonomy, Paleoecology, and Depositional Environment of Vertebrate Microfossil Bonebeds from the Late Cretaceous Hell Creek Formation in Garfield County, Montana A thesis submitted in partial fulfillment of the requirement for the degree of Bachelors of Science in Geology from The College of William and Mary by Sean Michael Moran Accepted for (Honors, High Honors) Rowan Lockwood, Director Matthew Carrano Christopher Bailey John Swaddle Williamsburg, VA April 15, 2011 Table of Contents List of Figures and Tables 3 Abstract 4 Introduction 5 Vertebrate Microfossil Bonebed Formation 7 Vertebrate Microfossil Bonebed Paleoecology 8 Geologic Setting 9 Hell Creek Vertebrate Fauna 12 Methods 16 HC10.01 20 HC10.02 21 HC10.03 23 HC10.04 24 HC10.05 25 Percent Diversity and Percent Abundance 26 Rarefaction 32 Amount of Wear 39 Differences in Maximum Dimension 41 Size vs.
    [Show full text]
  • Family-Group Names of Fossil Fishes
    © European Journal of Taxonomy; download unter http://www.europeanjournaloftaxonomy.eu; www.zobodat.at European Journal of Taxonomy 466: 1–167 ISSN 2118-9773 https://doi.org/10.5852/ejt.2018.466 www.europeanjournaloftaxonomy.eu 2018 · Van der Laan R. This work is licensed under a Creative Commons Attribution 3.0 License. Monograph urn:lsid:zoobank.org:pub:1F74D019-D13C-426F-835A-24A9A1126C55 Family-group names of fossil fi shes Richard VAN DER LAAN Grasmeent 80, 1357JJ Almere, The Netherlands. Email: [email protected] urn:lsid:zoobank.org:author:55EA63EE-63FD-49E6-A216-A6D2BEB91B82 Abstract. The family-group names of animals (superfamily, family, subfamily, supertribe, tribe and subtribe) are regulated by the International Code of Zoological Nomenclature. Particularly, the family names are very important, because they are among the most widely used of all technical animal names. A uniform name and spelling are essential for the location of information. To facilitate this, a list of family- group names for fossil fi shes has been compiled. I use the concept ‘Fishes’ in the usual sense, i.e., starting with the Agnatha up to the †Osteolepidiformes. All the family-group names proposed for fossil fi shes found to date are listed, together with their author(s) and year of publication. The main goal of the list is to contribute to the usage of the correct family-group names for fossil fi shes with a uniform spelling and to list the author(s) and date of those names. No valid family-group name description could be located for the following family-group names currently in usage: †Brindabellaspidae, †Diabolepididae, †Dorsetichthyidae, †Erichalcidae, †Holodipteridae, †Kentuckiidae, †Lepidaspididae, †Loganelliidae and †Pituriaspididae.
    [Show full text]
  • Konstantin V. KOVALEV 1, Dmitry A. BALASHOV 1, Alexey L
    ACTA ICHTHYOLOGICA ET PISCATORIA (2014) 44 (2): 111–116 DOI: 10.3750/AIP2014.44.2.04 THE KARYOTYPE OF THE AMU DARYA STURGEON, PSEUDOSCAPHIRHYNCHUS KAUFMANNI (ACTINOPTERYGII: ACIPENSERIFORMES: ACIPENSERIDAE) Konstantin V. KOVALEV 1, Dmitry A. BALASHOV 1, Alexey L. CHERNIAK 2, Elena B. LEBEDEVA 3, Ekaterina D. VASIL’EVA 4* , and Victor P. VASIL’EV 3 1 All-Russia Institute of Freshwater Fisheries, Rybmoe, Moskovskaya oblast, Russia 2 Moscow Zoo, Moscow, Russia 3 Severtsov Institute of Ecology and Evolution, Russian Academy of Sciences, Moscow, Russia 4 Zoological Museum, Moscow State University, Moscow, Russia Kovalev K.V., Balashov D.A., Cherniak A.L., Lebedeva E.B., Vasil’eva E.D., Vasil’ev V.P. 2014. The karyotype of the Amu Darya sturgeon, Pseudoscaphirhynchus kaufmanni (Actinopterygii: Acipenseriformes: Acipenseridae). Acta Ichthyol. Piscat. 44 (2): 111–116 . Background. Karyological studies of acipenserid fishes are of great importance because they present the only direct method to evaluate their ploidy levels for further research on polyploid evolution in these fishes. They are also important for prediction of the results of interspecific hybridizations in sturgeon aquaculture. None of the species of the genus Pseudoscaphirhynchus has hitherto been studied karyologically. The aim of this paper was to present the first data on the karyotype of the dwarf form of Pseudoscaphirhynchus kaufmanni (Kessler, 1877) . Materials and methods. Three females of the dwarf form of Pseudoscaphirhynchus kaufmanni of the total body length 19–23 cm were caught in the Vakhsh River (Amu Darya River drainage), Tadzhikistan, in 2012. The chro - mosome slides were prepared by using previously published karyological method of Vasil’ev and Sokolov.
    [Show full text]
  • Fishes of the World
    Fishes of the World Fishes of the World Fifth Edition Joseph S. Nelson Terry C. Grande Mark V. H. Wilson Cover image: Mark V. H. Wilson Cover design: Wiley This book is printed on acid-free paper. Copyright © 2016 by John Wiley & Sons, Inc. All rights reserved. Published by John Wiley & Sons, Inc., Hoboken, New Jersey. Published simultaneously in Canada. No part of this publication may be reproduced, stored in a retrieval system, or transmitted in any form or by any means, electronic, mechanical, photocopying, recording, scanning, or otherwise, except as permitted under Section 107 or 108 of the 1976 United States Copyright Act, without either the prior written permission of the Publisher, or authorization through payment of the appropriate per-copy fee to the Copyright Clearance Center, 222 Rosewood Drive, Danvers, MA 01923, (978) 750-8400, fax (978) 646-8600, or on the web at www.copyright.com. Requests to the Publisher for permission should be addressed to the Permissions Department, John Wiley & Sons, Inc., 111 River Street, Hoboken, NJ 07030, (201) 748-6011, fax (201) 748-6008, or online at www.wiley.com/go/permissions. Limit of Liability/Disclaimer of Warranty: While the publisher and author have used their best efforts in preparing this book, they make no representations or warranties with the respect to the accuracy or completeness of the contents of this book and specifically disclaim any implied warranties of merchantability or fitness for a particular purpose. No warranty may be createdor extended by sales representatives or written sales materials. The advice and strategies contained herein may not be suitable for your situation.
    [Show full text]
  • The Sturgeons: Fragile Species Need Conservation
    Turkish Journal of Fisheries and Aquatic Sciences 4: 49-57 (2004) REVIEW The Sturgeons: Fragile Species Need Conservation Serap Ustao÷lu1, øbrahim Okumuú2,* 1 Ondokuz Mayıs University, Faculty of Fisheries, 57000 Sinop, Turkey 2 Karadeniz Technical University, Faculty of Marine Sciences, Department of Fisheries, 61530 Sürmene, Trabzon, Turkey. * Corresponding Author: Tel.: +90. 462 7522805; Fax: +90. 462 7522158; Received 04 August 2004 E-mail: [email protected] Accepted 27 January 2005 Abstract Sturgeon is among the oldest fishes in the world. They are living in natural waters of Europe, Asia and the Northern America for 200 million years. Once abundant in lakes and rivers throughout the Northern Hemisphere, sturgeon stocks are now highly endangered, mostly due to over-harvesting and severe habitat alterations. Sturgeons are among the most valuable aquatic species in the world. They are prized for their delicate flesh and world famous caviar. They have also interesting evolutionary status and life history. Several species of sturgeon occurred in the Black Sea basin and in the waters of the neighbouring countries. At present more than 27 sturgeon species are found living throughout the world of which seven species are found distributed in the Black Sea and its drainage basin, namely beluga (Huso huso), Russian sturgeon (Acipenser gueldenstaedtii), common sturgeon (A. sturio), sterlet (A. ruthenus), ship (A. nudiventris), stellate (A. stellatus) and Persian sturgeon (A. persicus). The stocks have declined rapidly due to multi-factorial causes such as overfishing, destruction of critical habitats through construction of dams and dikes on the rivers obstructed the migration of the fish, industrial pollutions and fishing during spawning period.
    [Show full text]
  • Vertebrate Paleontology of Montana
    VERTEBRATE PALEONTOLOGY OF MONTANA John R. Horner1 and Dale A. Hanson2 1Chapman University, Orange, California; Montana State University, Bozeman, Montana 2South Dakota School of Mines & Technology, Rapid City, South Dakota (1) INTRODUCTION derived concerning the evolution, behavior, and paleo- Montana is renowned for its rich paleontological ecology of vertebrate fossil taxa from Montana. treasures, particularly those of vertebrate animals All Paleozoic vertebrates from Montana come such as fi shes, dinosaurs, and mammals. For exam- from marine sediments, whereas the Mesozoic as- ple, the most speciose fi sh fauna in the world comes semblages are derived from transgressive–regressive from Fergus County. The fi rst dinosaur remains noted alternating marine and freshwater deposits, and the from the western hemisphere came from an area near Cenozoic faunas are derived strictly from freshwater the mouth of the Judith River in what would become terrestrial environments. Fergus County. The fi rst Tyrannosaurus rex skeleton, (2) PALEOZOIC VERTEBRATES and many more since, have come from Garfi eld and McCone Counties. The fi rst dinosaur recognized to Two vertebrate assemblages are known from the show the relationship between dinosaurs and birds Paleozoic, one of Early Devonian age, and the other of came from Carbon County, and the fi rst dinosaur eggs, Late Mississippian age. embryos, and nests revealing dinosaur social behav- a. Early Devonian (Emsian: 407–397 Ma) iors were found in Teton County. The fi rst dinosaur Beartooth Butte Formation confi rmed to have denned in burrows was found in The oldest vertebrate remains found in Montana Beaverhead County. come from the Beartooth Butte Formation exposed Although Montana is not often thought of for in the Big Belt and Big Snowy Mountains of central mammal fossils, a great diversity of late Mesozoic Montana.
    [Show full text]
  • Family-Group Names of Fossil Fishes
    European Journal of Taxonomy 466: 1–167 ISSN 2118-9773 https://doi.org/10.5852/ejt.2018.466 www.europeanjournaloftaxonomy.eu 2018 · Van der Laan R. This work is licensed under a Creative Commons Attribution 3.0 License. Monograph urn:lsid:zoobank.org:pub:1F74D019-D13C-426F-835A-24A9A1126C55 Family-group names of fossil fishes Richard VAN DER LAAN Grasmeent 80, 1357JJ Almere, The Netherlands. Email: [email protected] urn:lsid:zoobank.org:author:55EA63EE-63FD-49E6-A216-A6D2BEB91B82 Abstract. The family-group names of animals (superfamily, family, subfamily, supertribe, tribe and subtribe) are regulated by the International Code of Zoological Nomenclature. Particularly, the family names are very important, because they are among the most widely used of all technical animal names. A uniform name and spelling are essential for the location of information. To facilitate this, a list of family- group names for fossil fishes has been compiled. I use the concept ‘Fishes’ in the usual sense, i.e., starting with the Agnatha up to the †Osteolepidiformes. All the family-group names proposed for fossil fishes found to date are listed, together with their author(s) and year of publication. The main goal of the list is to contribute to the usage of the correct family-group names for fossil fishes with a uniform spelling and to list the author(s) and date of those names. No valid family-group name description could be located for the following family-group names currently in usage: †Brindabellaspidae, †Diabolepididae, †Dorsetichthyidae, †Erichalcidae, †Holodipteridae, †Kentuckiidae, †Lepidaspididae, †Loganelliidae and †Pituriaspididae. Keywords. Nomenclature, ICZN, Vertebrata, Agnatha, Gnathostomata.
    [Show full text]
  • Management Plan for North Dakota and Montana Paddlefish Stocks and Fisheries a Cooperative Interstate Plan January 2008
    Management Plan for North Dakota and Montana Paddlefish Stocks and Fisheries A Cooperative Interstate Plan January 2008 DR. DENNIS L. SCARNECCHIA DEPARTMENT OF FISH AND WILDLIFE RESOURCES UNIVERSITY OF IDAHO MOSCOW, ID 83844-1136 (208) 885-5981 FAX (208) 885-6226 [email protected] L. FRED RYCKMAN NORTH DAKOTA GAME AND FISH DEPARTMENT 13932 WEST FRONT STREET WILLISTON, ND 58801 (701) 774-4320 FAX (701) 774-4305 [email protected] BRAD J. SCHMITZ MONTANA DEPARTMENT OF FISH, WILDLIFE AND PARKS BOX 1630 MILES CITY, MT 59330 (406) 232-0914 FAX (406) 232-4368 [email protected] SCOTT GANGL NORTH DAKOTA GAME AND FISH DEPARTMENT 100 NORTH BISMARCK EXPRESSWAY BISMARCK, ND 58501 (701) 328-6300 FAX (701) 328-6352 WILLIAM WIEDENHEFT MONTANA DEPARTMENT OF FISH, WILDLIFE AND PARKS RT 1- 4210 GLASGOW, MT 59230 (406) 228-3706 FAX (406) 228-8161 LAURA L. LESLIE MONTANA DEPARTMENT OF FISH, WILDLIFE AND PARKS 2165 HWY 2 HAVRE, MT 59501 (406) 265-6177 ext 226 FAX (406) 265-265-6123 and YOUNGTAIK LIM DEPARTMENT OF FISH AND WILDLIFE RESOURCES UNIVERSITY OF IDAHO MOSCOW, ID 83844-1136 Table of Contents List of Figures ............................................................................................................................... iv List of Tables ............................................................................................................................... vii Acknowledgements .................................................................................................................... viii Executive Summary ....................................................................................................................
    [Show full text]
  • The Caudal Skeleton of Acipenseriformes (Actinopterygii: Chondrostei): Recent Advances and New Observations
    Recent Advances in the Origin and Early Radiation of Vertebrates G. Arratia, M. V. H. Wilson & R. Cloutier (eds.): pp. 599-617, 7 figs. © 2004 by Verlag Dr. Friedrich Pfeil, München, Germany – ISBN 3-89937-052-X The caudal skeleton of Acipenseriformes (Actinopterygii: Chondrostei): recent advances and new observations Eric J. HILTON Abstract The caudal morphology of Acipenseriformes (sturgeons, paddlefishes, and their fossil relatives) is often cited in broad scale comparisons as representative of the plesiomorphic condition for Actinopterygii, yet there is signif- icant skeletal variation within the group that has not been fully appreciated. In this paper, the caudal skeletal morphology of Acipenseriformes is reviewed, and characters used in previous systematic analyses, as well as newly discovered and newly defined characters, are discussed in the context of current phylogenetic hypotheses. Characters identified and their suggested phylogenetic distribution include: 1) dorsal and ventral lobes of caudal fin being nearly equilobate (†Protopsephurus and Polyodon + †Crossopholis, or Polyodontidae with a reversal in Psephurus; independently derived in †Chondrosteus); 2) elongation and flattening of the caudal peduncle (Scaphi- rhynchus + †Protoscaphirhynchus); 3) caudal peduncle completely armored (Scaphirhynchus + †Protoscaphirhyn- chus); 4) presence of a cercus or caudal fin filament (Scaphirhynchini); 5) absence of epaxial caudal fin rays (independently derived in †Yanosteus and Scaphirhynchini); 6) reduction in size and number of dorsal
    [Show full text]