Presence of Amphibian Species Prediction Using Features Obtained
Total Page:16
File Type:pdf, Size:1020Kb

Load more
Recommended publications
-
Tetrapod Biostratigraphy and Biochronology of the Triassic–Jurassic Transition on the Southern Colorado Plateau, USA
Palaeogeography, Palaeoclimatology, Palaeoecology 244 (2007) 242–256 www.elsevier.com/locate/palaeo Tetrapod biostratigraphy and biochronology of the Triassic–Jurassic transition on the southern Colorado Plateau, USA Spencer G. Lucas a,⁎, Lawrence H. Tanner b a New Mexico Museum of Natural History, 1801 Mountain Rd. N.W., Albuquerque, NM 87104-1375, USA b Department of Biology, Le Moyne College, 1419 Salt Springs Road, Syracuse, NY 13214, USA Received 15 March 2006; accepted 20 June 2006 Abstract Nonmarine fluvial, eolian and lacustrine strata of the Chinle and Glen Canyon groups on the southern Colorado Plateau preserve tetrapod body fossils and footprints that are one of the world's most extensive tetrapod fossil records across the Triassic– Jurassic boundary. We organize these tetrapod fossils into five, time-successive biostratigraphic assemblages (in ascending order, Owl Rock, Rock Point, Dinosaur Canyon, Whitmore Point and Kayenta) that we assign to the (ascending order) Revueltian, Apachean, Wassonian and Dawan land-vertebrate faunachrons (LVF). In doing so, we redefine the Wassonian and the Dawan LVFs. The Apachean–Wassonian boundary approximates the Triassic–Jurassic boundary. This tetrapod biostratigraphy and biochronology of the Triassic–Jurassic transition on the southern Colorado Plateau confirms that crurotarsan extinction closely corresponds to the end of the Triassic, and that a dramatic increase in dinosaur diversity, abundance and body size preceded the end of the Triassic. © 2006 Elsevier B.V. All rights reserved. Keywords: Triassic–Jurassic boundary; Colorado Plateau; Chinle Group; Glen Canyon Group; Tetrapod 1. Introduction 190 Ma. On the southern Colorado Plateau, the Triassic– Jurassic transition was a time of significant changes in the The Four Corners (common boundary of Utah, composition of the terrestrial vertebrate (tetrapod) fauna. -
Animal Classification Subject Specific Vocabulary Interesting Books Sticky Knowledge About Classification of Micro-Organi Micro-Organisms Are Tiny
Year 6: Animal Classification Subject Specific Vocabulary Interesting Books Sticky Knowledge about Classification of micro-organi Micro-organisms are tiny. They are so small they can only be seen with a animals sm microscope. ❑ The largest vertebrate is the blue A vertebrate animal is one that has a whale, which can grow to over 100 vertebrates backbone. feet long and 400,000 pounds. An Invertebrate animal does not have a invertebrates ❑ The smallest vertebrate is thought backbone and 97% of creatures belong to be a tiny frog called the to this group. Paedophryne amauensis. It only This is the grouping together of similar grows to about 0.3 inches long. species species of plant, animal and other organisms. ❑ Vertebrates tend to be much more intelligent than invertebrates. Fungi are a group of living organisms fungi which are classified in their own ❑ Vertebrate animals can be either kingdom. This means they are not warm or cold-blooded. A animals, plants, or bacteria. cold-blooded animal cannot The whole organism is made up of just maintain a constant body monera one cell. The cell is more basic than temperature. The temperature of cells of other organisms. What do I need to know? their body is determined by the outside surroundings. Bacteria are tiny little organisms that are An invertebrate is an animal that bacteria ❑ everywhere around us. • How do you classify living things does not have a backbone. 97% Protists are not animals, plants, fungi, or of all animal species are protista into broad groups according to bacteria. Many protists are so small that invertebrates. -
Rampant Tooth Loss Across 200 Million Years of Frog Evolution
bioRxiv preprint doi: https://doi.org/10.1101/2021.02.04.429809; this version posted February 6, 2021. The copyright holder for this preprint (which was not certified by peer review) is the author/funder, who has granted bioRxiv a license to display the preprint in perpetuity. It is made available under aCC-BY 4.0 International license. 1 Rampant tooth loss across 200 million years of frog evolution 2 3 4 Daniel J. Paluh1,2, Karina Riddell1, Catherine M. Early1,3, Maggie M. Hantak1, Gregory F.M. 5 Jongsma1,2, Rachel M. Keeffe1,2, Fernanda Magalhães Silva1,4, Stuart V. Nielsen1, María Camila 6 Vallejo-Pareja1,2, Edward L. Stanley1, David C. Blackburn1 7 8 1Department of Natural History, Florida Museum of Natural History, University of Florida, 9 Gainesville, Florida USA 32611 10 2Department of Biology, University of Florida, Gainesville, Florida USA 32611 11 3Biology Department, Science Museum of Minnesota, Saint Paul, Minnesota USA 55102 12 4Programa de Pós Graduação em Zoologia, Universidade Federal do Pará/Museu Paraense 13 Emilio Goeldi, Belém, Pará Brazil 14 15 *Corresponding author: Daniel J. Paluh, [email protected], +1 814-602-3764 16 17 Key words: Anura; teeth; edentulism; toothlessness; trait lability; comparative methods 1 bioRxiv preprint doi: https://doi.org/10.1101/2021.02.04.429809; this version posted February 6, 2021. The copyright holder for this preprint (which was not certified by peer review) is the author/funder, who has granted bioRxiv a license to display the preprint in perpetuity. It is made available under aCC-BY 4.0 International license. -
3Systematics and Diversity of Extant Amphibians
Systematics and Diversity of 3 Extant Amphibians he three extant lissamphibian lineages (hereafter amples of classic systematics papers. We present widely referred to by the more common term amphibians) used common names of groups in addition to scientifi c Tare descendants of a common ancestor that lived names, noting also that herpetologists colloquially refer during (or soon after) the Late Carboniferous. Since the to most clades by their scientifi c name (e.g., ranids, am- three lineages diverged, each has evolved unique fea- bystomatids, typhlonectids). tures that defi ne the group; however, salamanders, frogs, A total of 7,303 species of amphibians are recognized and caecelians also share many traits that are evidence and new species—primarily tropical frogs and salaman- of their common ancestry. Two of the most defi nitive of ders—continue to be described. Frogs are far more di- these traits are: verse than salamanders and caecelians combined; more than 6,400 (~88%) of extant amphibian species are frogs, 1. Nearly all amphibians have complex life histories. almost 25% of which have been described in the past Most species undergo metamorphosis from an 15 years. Salamanders comprise more than 660 species, aquatic larva to a terrestrial adult, and even spe- and there are 200 species of caecilians. Amphibian diver- cies that lay terrestrial eggs require moist nest sity is not evenly distributed within families. For example, sites to prevent desiccation. Thus, regardless of more than 65% of extant salamanders are in the family the habitat of the adult, all species of amphibians Plethodontidae, and more than 50% of all frogs are in just are fundamentally tied to water. -
Orders of Magnitude (Length) - Wikipedia
03/08/2018 Orders of magnitude (length) - Wikipedia Orders of magnitude (length) The following are examples of orders of magnitude for different lengths. Contents Overview Detailed list Subatomic Atomic to cellular Cellular to human scale Human to astronomical scale Astronomical less than 10 yoctometres 10 yoctometres 100 yoctometres 1 zeptometre 10 zeptometres 100 zeptometres 1 attometre 10 attometres 100 attometres 1 femtometre 10 femtometres 100 femtometres 1 picometre 10 picometres 100 picometres 1 nanometre 10 nanometres 100 nanometres 1 micrometre 10 micrometres 100 micrometres 1 millimetre 1 centimetre 1 decimetre Conversions Wavelengths Human-defined scales and structures Nature Astronomical 1 metre Conversions https://en.wikipedia.org/wiki/Orders_of_magnitude_(length) 1/44 03/08/2018 Orders of magnitude (length) - Wikipedia Human-defined scales and structures Sports Nature Astronomical 1 decametre Conversions Human-defined scales and structures Sports Nature Astronomical 1 hectometre Conversions Human-defined scales and structures Sports Nature Astronomical 1 kilometre Conversions Human-defined scales and structures Geographical Astronomical 10 kilometres Conversions Sports Human-defined scales and structures Geographical Astronomical 100 kilometres Conversions Human-defined scales and structures Geographical Astronomical 1 megametre Conversions Human-defined scales and structures Sports Geographical Astronomical 10 megametres Conversions Human-defined scales and structures Geographical Astronomical 100 megametres 1 gigametre -
Cientistas Encontram Menor Rã Do Mundo Em Papua-Nova Guiné Ciências Enviado Por: Postado Em:16/01/2012
Disciplina - Ciências - Cientistas encontram menor rã do mundo em Papua-Nova Guiné Ciências Enviado por: Postado em:16/01/2012 Uma equipe de cientistas dos Estados Unidos anunciou a descoberta do que acreditam ser a menor espécie de rã do mundo, em Papua-Nova Guiné. A espécie, batizada de Paedophryne amauensis, tem 7,7 milímetros de comprimento e poderia ser também um dos menores seres vertebrados do mundo. Em um artigo publicado na última edição da revista científica "PLoS One", os pesquisadores anunciam também a descoberta de outra espécie próxima, Paedophryne swiftorum. Os cientistas sugerem que o reduzido tamanho da rã está ligado ao seu habitat, em folhas em decomposição no solo de uma floresta. Encontrar as rãs não foi uma tarefa fácil, porém, já que elas ficam muito bem camufladas entre as folhas. Além disso, esses animais desenvolveram a capacidade de emitir um som que lembra o dos insetos, tornando-os difíceis de detectar em meio à floresta. "As florestas da Nova Guiné são incrivelmente barulhentas à noite. Estávamos tentando registrar sons de rãs na floresta e estávamos curiosos sobre o que eram esses outros sons", contou à BBC o coordenador da pesquisa, Chris Austin, da Universidade Estadual de Louisiana, em Baton Rouge, nos Estados Unidos. "Então nós fizemos uma triangulação para detectar de onde esses sons estavam vindo e tentamos procurar nas folhas", disse. "Era noite, e essas criaturas são incrivelmente pequenas, então o que fizemos após várias tentativas frustradas foi tomar um punhado inteiro de folhas e jogá-las em um saco plástico", contou. "Quando fizemos isso, vimos essas incrivelmente minúsculas rãs saltando de um lado para o outro." MENORES O gênero Paedophryne foi identificado apenas recentemente e consiste em uma série de espécies pequenas encontradas em vários pontos das florestas do leste de Papua-Nova Guiné. -
ISSN 2007– 431X Sabanas De La Península De Yucatán, México
ISSN 2007– 431X Sabanas de la Península de Yucatán, México “Todos los hombres comprenderán que el reino mineral, vegetal, animal y toda materia esparcida por el universo, a todas escalas desde el átomo hasta la galaxia, son seres vivos con una conciencia evolutiva” Séptima profecía Maya. Vol. 5 No. 2 julio – diciembre de 2012 Revista de difusión científica Campus de Ciencias Bilógicas y Agropecuarias Universidad Autónoma de Yucatán Comité editorial Bioagrociencias, Año 5 (julio a diciembre de 2012), revista electrónica, es una publicación semestral edi- Editor general Virginia Meléndez Ramírez tada por la Universidad Autónoma de Yucatán, a tra- vés de la Facultad de Medicina Veterinaria y Zootec- Coeditor nia, km. 15.5 carretera Mérida-Xmatkuil s/n, Mérida, Alfonso Aguilar Perera Yucatán, México. Tel. 999 942 32 00 Editores asociados: http://www.vete-rinaria.uady.mx/revis-tas/index.php Víctor Cobos Gasca Luis López Burgos Silvia Hernández Betancourt Editor Responsable: Virginia Meléndez Ramírez, re- Juan Magaña Monforte serva del derecho al uso exclusivo 04-2012- Javier Quezada Euán 042417320400-203, ISSN 2007 - 431X. Responsable Luis Ramírez y Avilés de la última actualización: Carlos Canul Sansores, con Juan Javier Ortiz Díaz domicilio en Facultad de Medicina Veterinaria y Edwin J. Gutiérrez Ruíz Zootecnia, km. 15.5 carretera Mérida-Xmatkuil s/n, Mérida, Yucatán, México. Tel. 999 942 32 00. Directorio Mphil. Alfredo Dájer Abimerhi Fecha de última actualización: Octubre 2012. Rector M. en C. Marco Torres León Las opiniones expresadas por los autores no nece- Director sariamente reflejan la postura del editor o de la Dr. Jorge Santos Flores institución. -
Kinematics and Hydrodynamics Analysis of Swimming Anurans Reveals Striking Inter- Specific Differences in the Mechanism for Producing Thrust
621 The Journal of Experimental Biology 213, 621-634 © 2010. Published by The Company of Biologists Ltd doi:10.1242/jeb.032631 Kinematics and hydrodynamics analysis of swimming anurans reveals striking inter- specific differences in the mechanism for producing thrust Christopher T. Richards The Rowland Institute at Harvard, Harvard University, Cambridge, MA 02142, USA [email protected] Accepted 9 November 2009 SUMMARY This study aimed to compare the swimming kinematics and hydrodynamics within and among aquatic and semi-aquatic/terrestrial frogs. High-speed video was used to obtain kinematics of the leg joints and feet as animals swam freely across their natural range of speeds. Blade element analysis was then used to model the hydrodynamic thrust as a function of foot kinematics. Two purely aquatic frogs, Xenopus laevis and Hymenochirus boettgeri, were compared with two semi-aquatic/terrestrial frogs, Rana pipiens and Bufo americanus. The four species performed similarly. Among swimming strokes, peak stroke velocity ranged from 3.3±1.1 to 20.9±2.5, from 6.8±2.1 to 28.6±3.7 and from 4.9±0.5 to 20.9±4.1body lengths per second (BLs–1) in X. laevis, H. boettgeri and R. pipiens, respectively (means ± s.d.; N4 frogs for each). B. americanus swam much more slowly at 3.1±0.3 to 7.0±2.0BLs–1 (N3 frogs). Time-varying joint kinematics patterns were superficially similar among species. Because foot kinematics result from the cumulative motion of joints proximal to the feet, small differences in time-varying joint kinematics among species resulted in species-specific foot kinematics (therefore hydrodynamics) patterns. -
Krátkověkost Rozpad Kryptokoryn
e-akvarium.cz od akvaristů... pro akvaristy 52 /22.4.2021/ Oreichthys crenuchoides Listonoh Krátkověkost Rozpad kryptokoryn úvodník vychází čtvrtletně v elektronické podobě /formát .pdf/ Akvárium, číslo 52 e-akvarium.cz úvodník Milé akvaristky, milí akvaristé, snažím se sledovat novinky o ryBách nejen ty chovatelské Dole na následující stránce máme krédo, které nám po- a vědecké, ale také události ze světa zoo a veřejných akvárií, máhá najít čas a energii k propagaci akvaristiky. My na chovu ochranářských institucí apod. Přitom oBčas narazím na ná- ryB a dalších tvorů neshledáváme nic zlého, naopak. Vždyť pady, které mi hlava neBere. Když jsem před mnoha lety zkuste před akvárium postavit dítě, jak se mu rozzáří oči. četla, že jistá organizace Bojující za práva zvířat skutečně Vodní svět je tak jiný a tak fascinující, že nás všechny Bez vážně navrhuje, že By se ve veřejných akváriích měla krása rozdílu věku či vzdělání Baví a učí. podvodního světa ukazovat pomocí umělých ryB, pozdvihla Mám na Vás prosbu v souvislosti s aktuální situací. Možná jsem jen oBočí. Ale ta myšlenka není pryč, někdo to opravdu máte v okolí nějakou akvarijní expozici – místo, kam jezdíte považuje za doBrý nápad. Teď se ke mně donesl srdcervoucí s rodinou na výlet se podívat na ryBičky, neBo kam si zajdete příBěh oByčejné akvaristky, která po letech radosti z akvária sami v klidu načerpat inspiraci. Tato soukromá zařízení nedo- udělala chyBu a zaBila tím své ryBky. Tak ji to Bolelo a takové stala žádnou podporu od státu. Je jich docela dost od velkých měla výčitky, že si pořídila už jen ryBky umělé. -
Student Researchers Help Discover World's Smallest Frog 30 March 2012, by Krishna Ramanujan
Student researchers help discover world's smallest frog 30 March 2012, By Krishna Ramanujan "When we got back to camp, [Grundler] handed us a bag with a little frog," said paper lead author Eric Rittmeyer '08, a graduate student at Louisiana State University's (LSU) Museum of Natural Sciences. "None of us believed it was an adult, but in frogs, the calls are mating calls, and only mature males vocalize, so we knew it was an adult." Rittmeyer, Grundler and study co-author and classmate Derrick Thompson '09 then collected more specimens, which were identified as a new species. The adult males reach an average size of Paedophryne amauensis, the world's smallest frog 8.5 millimeters. species, on a dime. Rittmeyer et al. 2012 In 2009, Rittmeyer returned to Papua New Guinea as a graduate student with Christopher Austin, LSU associate professor of biological sciences and When two Cornell undergraduates and a recent curator of herpetology at the LSU Museum of graduate went on a field research trip to Papua Natural Science and the paper's senior author. This New Guinea in 2008, little did they know it would time, near Amau Village, they heard the clicks of lead to entries in the Guinness Book of World another frog and collected specimens of P. Records and a groundbreaking research paper. amanuensis for the first time. While P. swiftorum makes a series of double clicks, P. amanuensis The paper, published in January in Public Library has "regular single clicks faster than one per of Science One (PLoS One), describes the second; you could almost set a metronome by it," discovery of two diminutive frog species, Rittmeyer said. -
(Temnospondyli), and the Evolution of Modern
THE LOWER PERMIAN DISSOROPHOID DOLESERPETON (TEMNOSPONDYLI), AND THE EVOLUTION OF MODERN AMPHIBIANS Trond Sigurdsen Department of Biology McGill University, Montreal November 2009 A thesis submitted to McGill University in partial fulfillment of the requirements of the degree of Doctor of Philosophy © Trond Sigurdsen 2009 1 ACKNOWLEDGMENTS I am deeply grateful to my supervisors Robert L. Carroll and David M. Green for their support, and for revising and correcting the drafts of the individual chapters. Without their guidance, encouragement, and enthusiasm this project would not have been possible. Hans Larsson has also provided invaluable help, comments, and suggestions. Special thanks go to John R. Bolt, who provided specimens and contributed to Chapters 1 and 3. I thank Farish Jenkins, Jason Anderson, and Eric Lombard for making additional specimens available. Robert Holmes, Jean-Claude Rage, and Zbyněk Roček have all provided helpful comments and observations. Finally, I would like to thank present and past members of the Paleolab at the Redpath Museum, Montreal, for helping out in various ways. Specifically, Thomas Alexander Dececchi, Nadia Fröbisch, Luke Harrison, Audrey Heppleston and Erin Maxwell have contributed helpful comments and technical insight. Funding was provided by NSERC, the Max Stern Recruitment Fellowship (McGill), the Delise Allison and Alma Mater student travel grants (McGill), and the Society of Vertebrate Paleontology Student Travel Grant. 2 CONTRIBUTIONS OF AUTHORS Chapters 1 and 3 were written in collaboration with Dr. John R. Bolt from the Field Museum of Chicago. The present author decided the general direction of these chapters, studied specimens, conducted the analyses, and wrote the final drafts. -
ESCAPA, I.H., J. STERLI, D. POL, & L. NICOLI. 2008. Jurassic
Revista de la Asociación Geológica Argentina 63 (4): 613 - 624 (2008) 613 JURASSIC TETRAPODS AND FLORA OF CAÑADÓN ASFALTO FORMATION IN CERRO CÓNDOR AREA, CHUBUT PROVINCE Ignacio H. ESCAPA1, Juliana STERLI2, Diego POL1 and Laura NICOLI3 1 CONICET. Museo Paleontológico Egidio Feruglio. Trelew, Chubut. Email: [email protected], [email protected] 2 CONICET. Museo de Historia Natural de San Rafael, San Rafael, Mendoza. Email: [email protected] 3 CONICET. Departamento de Ciencias Geológicas, Facultad de Ciencias Exactas y Naturales, Universidad de Buenos Aires. Buenos Aires. Email: [email protected] ABSTRACT The plant and tetrapod fossil record of the Cañadón Asfalto Formation (Middle to Late Jurassic) found in Cerro Cóndor area (Chubut Province) is summarized here. The flora is dominated by conifers (Araucariaceae, Cupressaceae sensu lato) but also includes ferns and equisetaleans. The tetrapod fauna is composed of dinosaur taxa described in the 70's as well as other remains recently described and other vertebrate groups such as amphibians, turtles, and mammals. The amphibian remains have been interpreted as representatives of a new species of Notobatrachus, considered one of the most basal members of the anuran lineage. Similarly, turtle remains have been recently recognized as a new species of basal turtle, bringing valuable infor- mation about the early evolution of this group. The dinosaur remains are largely dominated by saurischian taxa, represented by basal forms of Eusauropoda and Tetanurae. In addition, three different mammalian species have been identified and con- sidered as early representatives of an endemic Gondwanan mammalian fauna. The fossil record of this formation represents the most completely known biota from the continental Middle to Late Jurassic of the Southern Hemisphere and one of the most complete of the entire world.