DOCSLIB.ORG

The Youngest Non-Lepidosirenid Lungfish of South

Total Page：16

File Type：pdf, Size：1020Kb

Download full-text PDF Read full-text
The Youngest Non-Lepidosirenid Lungfish of South The youngest non-lepidosirenid lungfish of South America (Dipnoi, latest Paleocene–earliest Eocene, Argentina) ALBERTO L. CIONE, SOLEDAD GOUIRIC-CAVALLI*, JAVIER N. GELFO AND FRANCISCO J. GOIN CIONE, A.L., GOUIRIC-CAVALLI, S., GELFO, J.N. & GOIN, F.J., iFirst article. The youngest non-lepidosirenid lungfish of South America (Dipnoi, latest Paleocene–earliest Eocene, Argentina). Alcheringa, 1–6. ISSN 0311-5518. The first lungfish tooth plate from the Las Flores Formation, Chubut, southern Argentina, is described. This is the youngest ceratodontid known from the continent. In Africa, ceratodonts disappeared in the Eocene. Afterwards, they are only known from Australia until their extinction during the Pleistocene. The Las Flores tooth plate also represents the southernmost lungfish known since the Coniacian (early Late Cretaceous). Alberto Luis Cione [[email protected]]; Soledad Gouiric-Cavalli* [[email protected]. edu.ar]; Javier Nicola´s Gelfo [[email protected]] and Francisco Goin [[email protected]. edu.ar], Divisio´n Paleontologı´a Vertebrados, Museo de La Plata, Paseo del Bosque s/n, W1900FWA La Plata, Argentina. *Corresponding author. Received 8.3.2010, revised 29.3.2010, accepted 13.4.2010. Key words: Ceratodontidae, South America, extinction, diversity. DURING the Mesozoic, lungfish were di- 1997a) and indeterminate ceratodonts and verse and almost cosmopolitan (Schultze Ceratodus sp. from the Danian Santa Lucı´a 2004). However, most genera became extinct Formation of Bolivia (Schultze 1991). before the Cenozoic. Since the beginning of A fragmentary tooth plate found in the Cenozoic, lungfish have been almost latest Paleocene–earliest Eocene beds in exclusively represented by the Neoceratodon- Patagonia by two of us (JNG and FJG) tidae and Lepidosirenidae, and have become shows that non–lepidosirenid lungfish sur- Downloaded By: [Gelfo, Javier] At: 14:49 8 September 2010 restricted to southern continents (South vived until this time in southern South America, Africa and Australia; Nelson 2006). America. Terminology is according to The only previously known Cenozoic Kemp (1993, 1997a,b, 2001). lungfish other than Lepidosirenidae and Neoceratodontidae are the ceratodontid Ceratodus humei Priem, 1914 from the Paleocene and Eocene of Saharan Africa Geographic and stratigraphic (Longbottom 1984, Churcher & de Iuliis provenance 2001), C. diutinus Kemp, 1993 from the The main exposures of the continental Las Oligocene–Miocene of Australia, Metacer- Flores Formation (Raigemborn et al. 2009) atodus bonei Kemp, 1997[a] from the upper are at the eastern tip of Gran Barranca, Oligocene to middle Miocene of Australia, south of Lago Colhue Huapi (south-central M. palmeri Krefft, 1874 from the Pliocene Sarmiento department, Chubut province, and Pleistocene of Australia (Kemp 1993, Argentina; Fig. 1). Together with the underlying Las Violetas and Pen˜ as Color- ISSN 0311-5518 (print)/ISSN 1752-0754 (online) Ó 2010 Association of Australasian Palaeontologists adas formations, and the overlying Koluel DOI: 10.1080/03115518.2010.489418 Kaike Formation, it is currently included 2 ALBERTO L. CIONE et al. ALCHERINGA within the Rio Chico Group, an essentially All evidence (sedimentary, mineralogical, continental sedimentary succession of late palaeobotanical) analyzed by Raigemborn Paleocene to middle Eocene age in the San et al. (2009) is consistent with the Las Flores Jorge Gulf Basin (Fig. 2). Stratigraphic Formation being deposited in ‘tropical’ or charts and profiles of these formations were ‘subtropical’ climates, with warm tempera- provided by Raigemborn et al. (2009). tures and abundant precipitation. Its mam- At Gran Barranca, the Las Flores For- mal content, including the impressive mation reaches 44 m thick. It consists marsupial fauna dominated by frugivorous mostly of greyish mudstones and minor forms, conforms to this interpretation. epiclastic and volcaniclastic sandstones de- posited in floodplain–shallow lacustrine en- vironments (Raigemborn et al. 2009). The Systematic palaeontology fossiliferous bed is a 52 m thick sandstone DIPNOI Mu¨ller, 1845 near the base of this formation (4584302600S, CERATODONTIDAE Gill, 1872 6883701400W). There is no evidence of re- worked material at this level and locality. Ceratodontidae indet. (Fig. 3A–E) Apart from the ceratodontid lungfish de- scribed here, around 1500 mammal remains Material. MLP 90-II-5-990, a fragmentary (mostly, isolated teeth) have been exhumed upper tooth plate preserving the greater part and are currently under study. This rich of the first ridge and the whole second ridge. mammalian fossil assemblage indicates an The biological wear was normal, and the Itaboraian age of the South American Chro- material does not show any evidence of nological Scale (Paleocene–earliest Eocene; significant post-mortem abrasion. Bond et al. 1995, Gelfo et al. 2009). Repository. Divisio´n Paleontologı´a Verte- brados, Museo de La Plata (W1900FWA) La Plata, Argentina. Description. The tooth plate is small. The very deep second cleft would indicate that Downloaded By: [Gelfo, Javier] At: 14:49 8 September 2010 there were few ridges, perhaps five (Fig. 3E). The medial edge of the plate is convex, and the mesiolingual edge appears to have been relatively concave. The mediolingual junc- tion is angled (ca 1188). The loss of enamel and dentine on the mediolingual face is slight. The two preserved ridges are sharp, slender, high, straight and acute (the sec- ond), and originate anteriorly. The first ridge tip is broken. The labial profile of the second ridge is steep and there are no cusps. The angle between the preserved ridges is 288. The first cleft is relatively shallow and rounded. The pulp cavity is large. The enamel strongly ascends in the cleft labially. Punctations are simple (petrodentine sensu Fig. 1. Location map. Star indicates the fossil locality. Kemp 2001 absent) and cover the occlusal ALCHERINGA SOUTH AMERICAN TERTIARY LUNGFISH 3 Downloaded By: [Gelfo, Javier] At: 14:49 8 September 2010 Fig. 2. Stratigraphic chart of the Paleogene of Argentina. SALMAs, South American Land Mammal Ages. surface. Some punctations appear to be pulp cavity, lack of petrodentine, obtuse crest arranged in radiating series. Most are angle and relatively well marked inner angle irregular. No occlusal pits are evident. and the occlusal profile (as preserved) sepa- Tooth plates appear to have not been in rates the tooth plate from those of Mesozoic close contact. The small size of the tooth and Cenozoic Lepidosirenidae, Asiatocera- plate and the large size of the punctations todontidae, Arganodontidae, Ptychocerato- suggest a juvenile. A pterygopalatine process dontidae, Ferganoceratodus Kaznyshkin & is present, just behind the first and second Nessov, 1985, Atlantoceratodus Cione et al., ridge (Fig. 3B–C). 2007 and some genera of Neoceratodontidae and Ceratodontidae. Comparisons. The combination of sharp, The tooth plate, although fragmentary, slender, high, straight, acute crests that clearly differs from the South American originate anteriorly, deep and rounded clefts, Lepidosirenidae and neoceratodontid gen- irregular punctations arranged in lines, ab- era Mioceratodus Kemp, 1998 and Archae- sence of occlusal pits, absence of cusps, large oceratodus Kemp, 1997[b] in the occlusal 4 ALBERTO L. CIONE et al. ALCHERINGA Fig. 3. Ceratodontidae indet. tooth plate. A, occlusal view; B, dorsal view; C, labial profile; D, detail of bone and enamel on the base of the tooth plate; E, reconstruction of the tooth plate. Scale bar ¼ 2 mm. Arrows indicate pterygoid process. profile and the absence of petrodentine. It MLP 90-II-5-990 is similar to some also does not resemble Neoceratodus tooth plates of the Cretaceous to Pleistocene Castelnau, 1876. ceratodontid genus Metaceratodus. Crest The material is similar to tooth plates of shape and a concave lingual edge resemble some Ceratodontidae such as Ceratodus those of the Australian Cretaceous species Agassiz, 1838 and Metaceratodus in occlusal M. ellioti Kemp, 1997[a]. However, we have Downloaded By: [Gelfo, Javier] At: 14:49 8 September 2010 profile. However, it differs from the type not observed the typical occlusal pits of that species of Ceratodus, C. latissimus Agassiz, genus. 1838, from C. humei from the Paleocene and Eocene of Africa and from other Ceratodus by its deep clefts; sharp, slender, high, Discussion straight crests; and apparent absence of Dipnoans were cosmopolitan during the occlusal pits (see Kemp 1993, Churcher early Mesozoic, but gradually became re- et al.2006).ItdiffersfromC. diutinus from stricted to their current distribution in the the Miocene of Australia in occlusal profile, Southern Hemisphere during the Cretaceous from the putative new genus of Ceratodonti- (Fig. 4). There is no explanation for their dae from the Danian of Bolivia (Schultze demise in the Northern Hemisphere. 1991) in the occlusal surface pattern and from The youngest record of non–lepidosirenid ‘Ceratodus sp.’ from the Upper Cretaceous of lungfish in Africa is from the Eocene and in Pajcha Pata of Bolivia (Gayet et al.2001)in South America from the late Paleocene– the occlusal profile, the different inner angle earliest Eocene (Longbottom 1984; this and orientation of crests, and the mesiolin- paper). Presently, lepidosirenids inhabit gual concave profile. Africa and South America (Nelson 2006). ALCHERINGA SOUTH AMERICAN TERTIARY LUNGFISH 5 Fig. 4. Eocene palaeogeographic map (modified from Blakey 2009) showing the distribution of Cenozoic dipnoans in different
Load more

Recommended publications
  • Cambridge University Press 978-1-107-17944-8 — Evolution And
    Cambridge University Press 978-1-107-17944-8 — Evolution and Development of Fishes Edited by Zerina Johanson , Charlie Underwood , Martha Richter Index More Information Index abaxial muscle,33 Alizarin red, 110 arandaspids, 5, 61–62 abdominal muscles, 212 Alizarin red S whole mount staining, 127 Arandaspis, 5, 61, 69, 147 ability to repair fractures, 129 Allenypterus, 253 arcocentra, 192 Acanthodes, 14, 79, 83, 89–90, 104, 105–107, allometric growth, 129 Arctic char, 130 123, 152, 152, 156, 213, 221, 226 alveolar bone, 134 arcualia, 4, 49, 115, 146, 191, 206 Acanthodians, 3, 7, 13–15, 18, 23, 29, 63–65, Alx, 36, 47 areolar calcification, 114 68–69, 75, 79, 82, 84, 87–89, 91, 99, 102, Amdeh Formation, 61 areolar cartilage, 192 104–106, 114, 123, 148–149, 152–153, ameloblasts, 134 areolar mineralisation, 113 156, 160, 189, 192, 195, 198–199, 207, Amia, 154, 185, 190, 193, 258 Areyongalepis,7,64–65 213, 217–218, 220 ammocoete, 30, 40, 51, 56–57, 176, 206, 208, Argentina, 60–61, 67 Acanthodiformes, 14, 68 218 armoured agnathans, 150 Acanthodii, 152 amphiaspids, 5, 27 Arthrodira, 12, 24, 26, 28, 74, 82–84, 86, 194, Acanthomorpha, 20 amphibians, 1, 20, 150, 172, 180–182, 245, 248, 209, 222 Acanthostega, 22, 155–156, 255–258, 260 255–256 arthrodires, 7, 11–13, 22, 28, 71–72, 74–75, Acanthothoraci, 24, 74, 83 amphioxus, 49, 54–55, 124, 145, 155, 157, 159, 80–84, 152, 192, 207, 209, 212–213, 215, Acanthothoracida, 11 206, 224, 243–244, 249–250 219–220 acanthothoracids, 7, 12, 74, 81–82, 211, 215, Amphioxus, 120 Ascl,36 219 Amphystylic, 148 Asiaceratodus,21
    [Show full text]
  • Identifying Heterogeneity in Rates of Morphological Evolution: Discrete Character Change in the Evolution of Lungfish (Sarcopterygii; Dipnoi)
    ORIGINAL ARTICLE doi:10.1111/j.1558-5646.2011.01460.x IDENTIFYING HETEROGENEITY IN RATES OF MORPHOLOGICAL EVOLUTION: DISCRETE CHARACTER CHANGE IN THE EVOLUTION OF LUNGFISH (SARCOPTERYGII; DIPNOI) Graeme T. Lloyd,1,2 Steve C. Wang,3 and Stephen L. Brusatte4,5 1Department of Palaeontology, Natural History Museum, Cromwell Road, London SW7 5BD, United Kingdom 2E-mail: [email protected] 3Department of Mathematics and Statistics, Swarthmore College, Swarthmore, Pennsylvania 19081 4Division of Paleontology, American Museum of Natural History, Central Park West at 79th Street, New York, New York 10024 5Department of Earth and Environmental Sciences, Columbia University, New York, New York 10025 Received February 9, 2010 Accepted August 15, 2011 Data Archived: Dryad: doi:10.5061/dryad.pg46f Quantifying rates of morphological evolution is important in many macroevolutionary studies, and critical when assessing possible adaptive radiations and episodes of punctuated equilibrium in the fossil record. However, studies of morphological rates of change have lagged behind those on taxonomic diversification, and most authors have focused on continuous characters and quantifying patterns of morphological rates over time. Here, we provide a phylogenetic approach, using discrete characters and three statistical tests to determine points on a cladogram (branches or entire clades) that are characterized by significantly high or low rates of change. These methods include a randomization approach that identifies branches with significantly high rates and likelihood ratio tests that pinpoint either branches or clades that have significantly higher or lower rates than the pooled rate of the remainder of the tree. As a test case for these methods, we analyze a discrete character dataset of lungfish, which have long been regarded as “living fossils” due to an apparent slowdown in rates since the Devonian.
    [Show full text]
  • New Locality for Lepidosiren Paradoxa (Fitzinger, 1837)(Dipnoi
    13 3 the journal of 2118 biodiversity data 20 May 2017 Check List NOTES ON GEOGRAPHIC DISTRIBUTION Check List 13(3): 2118, 20 May 2017 https://doi.org/10.15560/13.3.2118 ISSN 1809-127X © 2017 Check List and Authors New locality for Lepidosiren paradoxa (Fitzinger, 1837) (Dipnoi: Lepidosirenidae) in Argentina Evelyn Romina Vallone Laboratorio de Paleontología de Vertebrados, Centro de Investigaciones Científicas y Transferencia de Tecnología a la Producción (CICyTTP-CONICET), Materi y España, 3105 Diamante, ER, Argentina E-mail: [email protected] Abstract. This study documents a new locality of the lungfish was caught by a local fisherman in shallow waters (depth of Lepidosiren paradoxa on the coast of the Entre Rios Province approximately 3 m) in a coastal area of the locality of Gen- in the lower Paraná River. This finding represents the third eral Alvear, Entre Ríos Province, Argentina (31°55ʹ27.60ʺ S, southern record of this species on southern of South America. 060°39ʹ45.52ʺ W) (Fig. 1). After collection, the specimen was Additionally, as this region has been relatively well sampled frozen and transported to the laboratory for identification. The both during past decades and currently, I discuss possible specimen was identified according to diagnosis of Ringuelet reasons why this new specimen has been observed only et al. (1967) then deposited in the Fish Collection of the Labo- recently. ratorio de Vertebrados, Centro de Investigaciones Científicas y Key words. South American lungfish; Entre Ríos; Paraná River Transferencia de Tecnología a la Producción (CICyTTP-V-18, Diamante, Entre Ríos, Argentina). The description follows the anatomical nomenclature proposed by Ringuelet et al.
    [Show full text]
  • Morphology, Phylogeny, and Evolution of Diadectidae (Cotylosauria: Diadectomorpha)
    Morphology, Phylogeny, and Evolution of Diadectidae (Cotylosauria: Diadectomorpha) by Richard Kissel A thesis submitted in conformity with the requirements for the degree of doctor of philosophy Graduate Department of Ecology & Evolutionary Biology University of Toronto © Copyright by Richard Kissel 2010 Morphology, Phylogeny, and Evolution of Diadectidae (Cotylosauria: Diadectomorpha) Richard Kissel Doctor of Philosophy Graduate Department of Ecology & Evolutionary Biology University of Toronto 2010 Abstract Based on dental, cranial, and postcranial anatomy, members of the Permo-Carboniferous clade Diadectidae are generally regarded as the earliest tetrapods capable of processing high-fiber plant material; presented here is a review of diadectid morphology, phylogeny, taxonomy, and paleozoogeography. Phylogenetic analyses support the monophyly of Diadectidae within Diadectomorpha, the sister-group to Amniota, with Limnoscelis as the sister-taxon to Tseajaia + Diadectidae. Analysis of diadectid interrelationships of all known taxa for which adequate specimens and information are known—the first of its kind conducted—positions Ambedus pusillus as the sister-taxon to all other forms, with Diadectes sanmiguelensis, Orobates pabsti, Desmatodon hesperis, Diadectes absitus, and (Diadectes sideropelicus + Diadectes tenuitectes + Diasparactus zenos) representing progressively more derived taxa in a series of nested clades. In light of these results, it is recommended herein that the species Diadectes sanmiguelensis be referred to the new genus
    [Show full text]
  • Geological Survey of Ohio
    GEOLOGICAL SURVEY OF OHIO. VOL. I.—PART II. PALÆONTOLOGY. SECTION II. DESCRIPTIONS OF FOSSIL FISHES. BY J. S. NEWBERRY. Digital version copyrighted ©2012 by Don Chesnut. THE CLASSIFICATION AND GEOLOGICAL DISTRIBUTION OF OUR FOSSIL FISHES. So little is generally known in regard to American fossil fishes, that I have thought the notes which I now give upon some of them would be more interesting and intelligible if those into whose hands they will fall could have a more comprehensive view of this branch of palæontology than they afford. I shall therefore preface the descriptions which follow with a few words on the geological distribution of our Palæozoic fishes, and on the relations which they sustain to fossil forms found in other countries, and to living fishes. This seems the more necessary, as no summary of what is known of our fossil fishes has ever been given, and the literature of the subject is so scattered through scientific journals and the proceedings of learned societies, as to be practically inaccessible to most of those who will be readers of this report. I. THE ZOOLOGICAL RELATIONS OF OUR FOSSIL FISHES. To the common observer, the class of Fishes seems to be well defined and quite distin ct from all the other groups o f vertebrate animals; but the comparative anatomist finds in certain unusual and aberrant forms peculiarities of structure which link the Fishes to the Invertebrates below and Amphibians above, in such a way as to render it difficult, if not impossible, to draw the lines sharply between these great groups.
    [Show full text]
  • Gondwana Vertebrate Faunas of India: Their Diversity and Intercontinental Relationships
    438 Article 438 by Saswati Bandyopadhyay1* and Sanghamitra Ray2 Gondwana Vertebrate Faunas of India: Their Diversity and Intercontinental Relationships 1Geological Studies Unit, Indian Statistical Institute, 203 B. T. Road, Kolkata 700108, India; email: [email protected] 2Department of Geology and Geophysics, Indian Institute of Technology, Kharagpur 721302, India; email: [email protected] *Corresponding author (Received : 23/12/2018; Revised accepted : 11/09/2019) https://doi.org/10.18814/epiiugs/2020/020028 The twelve Gondwanan stratigraphic horizons of many extant lineages, producing highly diverse terrestrial vertebrates India have yielded varied vertebrate fossils. The oldest in the vacant niches created throughout the world due to the end- Permian extinction event. Diapsids diversified rapidly by the Middle fossil record is the Endothiodon-dominated multitaxic Triassic in to many communities of continental tetrapods, whereas Kundaram fauna, which correlates the Kundaram the non-mammalian synapsids became a minor components for the Formation with several other coeval Late Permian remainder of the Mesozoic Era. The Gondwana basins of peninsular horizons of South Africa, Zambia, Tanzania, India (Fig. 1A) aptly exemplify the diverse vertebrate faunas found Mozambique, Malawi, Madagascar and Brazil. The from the Late Palaeozoic and Mesozoic. During the last few decades much emphasis was given on explorations and excavations of Permian-Triassic transition in India is marked by vertebrate fossils in these basins which have yielded many new fossil distinct taxonomic shift and faunal characteristics and vertebrates, significant both in numbers and diversity of genera, and represented by small-sized holdover fauna of the providing information on their taphonomy, taxonomy, phylogeny, Early Triassic Panchet and Kamthi fauna.
    [Show full text]
  • The Fishesof Uganda-I
    1'0 of the Pare (tagu vaIley.': __ THE FISHES OF UGANDA-I uku-BujukUf , high peaks' By P. H. GREENWOOD Fons Nilus'" East African Fisheries Research Organization ~xplorersof' . ;ton, Fresh_ CHAPTER I I\.bruzzi,Dr: knowledge : INTRODUCTION ~ss to it, the ,THE fishes of Uganda have been subject to considerable study. Apart from .h to take it many purely descriptive studies of the fishes themselves, three reports have . been published which deal with the ecology of the lakes in relation to fish and , fisheries (Worthington (1929a, 1932b): Graham (1929)).Much of the literature is scattered in various scientific journals, dating back to the early part of the ; century and is difficult to obtain iIi Uganda. The more recent reports also are out of print and virtually unobtainable. The purpose .of this present survey is to bring together the results of these many researches and to present, in the light of recent unpublished information, an account of the taxonomy and biology of the many fish species which are to be found in the lakes and rivers of Uganda. Particular attention has been paid to the provision of keys, so that most of the fishesmay be easily identified. It is hardly necessary to emphasize that our knowledge of the East African freshwater fishes is still in an early and exploratory stage of development. Much that has been written is known to be over-generalized, as conclusions were inevitably drawn from few and scattered observations or specimens. From the outset it must be stressed that the sections of this paper dealing with the classification and description of the fishes are in no sense a full tax- onomicrevision although many of the descriptions are based on larger samples than were previously available.
    [Show full text]
  • Protopterus Annectens (OWEN) in IDAH AREA of RIVER NIGER, NIGERIA
    Animal Research International (2010) 7(3): 1264 – 1266 1264 LENGTH-WEIGHT RELATIONSHIP AND CONDITION FACTOR OF Protopterus annectens (OWEN) IN IDAH AREA OF RIVER NIGER, NIGERIA ADEYEMI, Samuel Olusegun Department of Biological Sciences, Kogi State University, PMB 1008, Anyigba Email: [email protected] Phone: +234 8062221968 ABSTRACT A total of 62 samples of Protopterus annectens (Owen) were examined for this study from Idah area of River Niger between August and November 2008. The length-weight relationship calculated for species gave a b-value of 2.55 which is indicative of negative allometric growth. It attained a length of 59cm and weight of 397g. The condition factor varied from 0.23 to 0.76 with a mean of 0.39+0.08 and showed that the fish was well and in good environment for growth and survival. Keywords: Protopterus annectens, Allometric growth, Survival, Length-weight relationship, Condition INTRODUCTION factor of P. annectens in order to aid its management in the river. Fish found in tropical and sub-tropical water system experience frequency growth MATERIALS AND METHODS fluctuations due to changes in food composition, environmental variables and spawning Study Area: The study area is Idah area of conditions among others. Length-weight and River Niger in Idah Local Government Area of length-length relationships can be used to asses Kogi State, Nigeria. The river extends from the influence of these factors in fish. Kulbicki et Lokoja via Ajaokuta, Itobe to Idah. The river is al. (1993) and King (1996) reported that fish located on latitude 7007N and longitude 6044E. growth, mean weight at a given body length of The water temperature range between 220C and fish and the relative wellbeing in fish can be 310C, Idah has a tropical savannah climate with known through this relationship.
    [Show full text]
  • Ceratodus Tunuensis, Sp. Nov., a New Lungfish (Sarcopterygii, Dipnoi) from the Upper Triassic of Central East Greenland
    Journal of Vertebrate Paleontology ISSN: 0272-4634 (Print) 1937-2809 (Online) Journal homepage: http://www.tandfonline.com/loi/ujvp20 Ceratodus tunuensis, sp. nov., a new lungfish (Sarcopterygii, Dipnoi) from the Upper Triassic of central East Greenland Federico L. Agnolin, Octávio Mateus, Jesper Milàn, Marco Marzola, Oliver Wings, Jan Schulz Adolfssen & Lars B. Clemmensen To cite this article: Federico L. Agnolin, Octávio Mateus, Jesper Milàn, Marco Marzola, Oliver Wings, Jan Schulz Adolfssen & Lars B. Clemmensen (2018) Ceratodus tunuensis, sp. nov., a new lungfish (Sarcopterygii, Dipnoi) from the Upper Triassic of central East Greenland, Journal of Vertebrate Paleontology, 38:2, e1439834, DOI: 10.1080/02724634.2018.1439834 To link to this article: https://doi.org/10.1080/02724634.2018.1439834 Published online: 12 Apr 2018. Submit your article to this journal Article views: 58 View related articles View Crossmark data Full Terms & Conditions of access and use can be found at http://www.tandfonline.com/action/journalInformation?journalCode=ujvp20 Journal of Vertebrate Paleontology e1439834 (6 pages) Ó by the Society of Vertebrate Paleontology DOI: 10.1080/02724634.2018.1439834 ARTICLE CERATODUS TUNUENSIS, SP. NOV., A NEW LUNGFISH (SARCOPTERYGII, DIPNOI) FROM THE UPPER TRIASSIC OF CENTRAL EAST GREENLAND FEDERICO L. AGNOLIN,1,2 OCTAVIO MATEUS, *,3,4 JESPER MILAN, 5,6 MARCO MARZOLA, 3,4,7,8 OLIVER WINGS,9 JAN SCHULZ ADOLFSSEN,10 and LARS B. CLEMMENSEN 7 1Laboratorio de Anatomıa Comparada y Evolucion de los Vertebrados, Museo Argentino de
    [Show full text]
  • A Lungfish Survivor of the End-Devonian Extinction and an Early Carboniferous Dipnoan
    1 A Lungfish survivor of the end-Devonian extinction and an Early Carboniferous dipnoan 2 radiation. 3 4 Tom J. Challands1*, Timothy R. Smithson,2 Jennifer A. Clack2, Carys E. Bennett3, John E. A. 5 Marshall4, Sarah M. Wallace-Johnson5, Henrietta Hill2 6 7 1School of Geosciences, University of Edinburgh, Grant Institute, James Hutton Road, Edinburgh, 8 EH9 3FE, UK. email: [email protected]; tel: +44 (0) 131 650 4849 9 10 2University Museum of Zoology Cambridge, Downing Street, Cambridge CB2 3EJ, UK. 11 12 3Department of Geology, University of Leicester, Leicester LE1 7RH, UK. 13 14 4School of Ocean & Earth Science, University of Southampton, National Oceanography Centre, 15 European Way, University Road, Southampton, SO14 3ZH , UK. 16 17 5Sedgwick Museum, Department of Earth Sciences, University of Cambridge, Downing St., 18 Cambridge CB2 3EQ, UK 1 19 Abstract 20 21 Until recently the immediate aftermath of the Hangenberg event of the Famennian Stage (Upper 22 Devonian) was considered to have decimated sarcopterygian groups, including lungfish, with only 23 two taxa, Occludus romeri and Sagenodus spp., being unequivocally recorded from rocks of 24 Tournaisian age (Mississippian, Early Carboniferous). Recent discoveries of numerous 25 morphologically diverse lungfish tooth plates from southern Scotland and northern England indicate 26 that at least ten dipnoan taxa existed during the earliest Carboniferous. Of these taxa, only two, 27 Xylognathus and Ballgadus, preserve cranial and post-cranial skeletal elements that are yet to be 28 described. Here we present a description of the skull of a new genus and species of lungfish, 29 Limanichthys fraseri gen.
    [Show full text]
  • I Ecomorphological Change in Lobe-Finned Fishes (Sarcopterygii
    Ecomorphological change in lobe-finned fishes (Sarcopterygii): disparity and rates by Bryan H. Juarez A thesis submitted in partial fulfillment of the requirements for the degree of Master of Science (Ecology and Evolutionary Biology) in the University of Michigan 2015 Master’s Thesis Committee: Assistant Professor Lauren C. Sallan, University of Pennsylvania, Co-Chair Assistant Professor Daniel L. Rabosky, Co-Chair Associate Research Scientist Miriam L. Zelditch i © Bryan H. Juarez 2015 ii ACKNOWLEDGEMENTS I would like to thank the Rabosky Lab, David W. Bapst, Graeme T. Lloyd and Zerina Johanson for helpful discussions on methodology, Lauren C. Sallan, Miriam L. Zelditch and Daniel L. Rabosky for their dedicated guidance on this study and the London Natural History Museum for courteously providing me with access to specimens. iii TABLE OF CONTENTS ACKNOWLEDGEMENTS ii LIST OF FIGURES iv LIST OF APPENDICES v ABSTRACT vi SECTION I. Introduction 1 II. Methods 4 III. Results 9 IV. Discussion 16 V. Conclusion 20 VI. Future Directions 21 APPENDICES 23 REFERENCES 62 iv LIST OF TABLES AND FIGURES TABLE/FIGURE II. Cranial PC-reduced data 6 II. Post-cranial PC-reduced data 6 III. PC1 and PC2 Cranial and Post-cranial Morphospaces 11-12 III. Cranial Disparity Through Time 13 III. Post-cranial Disparity Through Time 14 III. Cranial/Post-cranial Disparity Through Time 15 v LIST OF APPENDICES APPENDIX A. Aquatic and Semi-aquatic Lobe-fins 24 B. Species Used In Analysis 34 C. Cranial and Post-Cranial Landmarks 37 D. PC3 and PC4 Cranial and Post-cranial Morphospaces 38 E. PC1 PC2 Cranial Morphospaces 39 1-2.
    [Show full text]
  • Histology of Juvenile Skin of Lepidosiren Paradoxa Fitzinger, 1837 (Sarcopterygii, Dipnoi)
    Anais da Academia Brasileira de Ciências (2019) 91(4): e20190822 (Annals of the Brazilian Academy of Sciences) Printed version ISSN 0001-3765 / Online version ISSN 1678-2690 http://dx.doi.org/10.1590/0001-3765201920190822 www.scielo.br/aabc | www.fb.com/aabcjournal Histology of juvenile skin of Lepidosiren paradoxa Fitzinger, 1837 (Sarcopterygii, Dipnoi) LUIS ALBERTO ROMANO1, ANDREA I.H. LÓPEZ1, JUAN RAFAEL BUITRAGO2 and VIRGÍNIA F. PEDROSA1 1Institute of the Oceanography, University Federal of the Rio Grande, Laboratory of the de Immunology and Pathology of the Aquatic Organisms, Rua do Hotel, 2, Cassino, 96210-030 Rio Grande, RS, Brazil 2University Federal of the Rio Grande, Laboratory of the Biochemistry Functional of Aquatic Organisms, Rua do Hotel, 2, Cassino, 96210-030 Rio Grande, RS, Brazil Manuscript received on July 20, 2019; accepted for publication on September 24, 2019 How to cite: ROMANO LA, LÓPEZ AIH, BUITRAGO JR AND PEDROSA VF. 2019. Histology of juvenile skin of Lepidosiren paradoxa Fitzinger, 1837 (Sarcopterygii, Dipnoi). An Acad Bras Cienc 91: e20190822. DOI 10.1590/0001-3765201920190822. Abstract: The skin of three juvenile Lepidosiren paradoxa specimens was examined. The epidermis was composed of a polystratified epithelium resting on a basement membrane, including mucus-secreting cells, and a cuticle of mucopolysaccharides on the surface. Two types of skin receptors, electroreceptors and mechanoreceptors, were found; the first type was located in the dermoepidermal junction, and the second type was completely intraepiderma. The skin structure of these fish, suggests the possibility of the skin participating in the breath. Key words: electroreceptors, lungfish, mechanoreceptors, Paraná River basin, pirambóia.
    [Show full text]