Diplostraca (Types and Figured Specimens)
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The Morphology and Systematics of the Clam Shrimp Platyestheria Gen
Cretaceous Research 91 (2018) 274e286 Contents lists available at ScienceDirect Cretaceous Research journal homepage: www.elsevier.com/locate/CretRes The morphology and systematics of the clam shrimp Platyestheria gen. nov. abaetensis (Cardoso) (Crustacea, Spinicaudata) from the Lower Cretaceous of the Sanfranciscana Basin, southeast Brazil * Jonathas S. Bittencourt a, , Rosemarie Rohn b, Oscar F. Gallego c, Mateo D. Monferran c, Alexandre Uhlein a a Laboratorio de Paleontologia e Macroevoluçao,~ Centro de Pesquisas Professor Manoel Teixeira da Costa, Departamento de Geologia, Instituto de Geoci^encias, Universidade Federal de Minas Gerais, Av. Presidente Antonio^ Carlos 6627, Pampulha, 31270-901, Belo Horizonte, MG, Brazil b Sao~ Paulo State University (UNESP), Institute of Geosciences and Exact Sciences, Department of Applied Geology, Rio Claro Campus, Av. 24A, 1515, 13506- 900, Rio Claro, SP, Brazil c Centro de Ecología Aplicada del Litoral, CONICET-UNNE and Geología Historica-Micropaleontología (Area Ciencias de la Tierra - Departamento de Biología), FaCENA-UNNE, Casilla de Correo 128, 3400 Corrientes, Argentina article info abstract Article history: New specimens of the clam shrimp ‘Pseudestheria’ abaetensis Cardoso, 1971 (Spinicaudata) are described. Received 6 February 2018 The material was collected from the Quirico Formation (Lower Cretaceous of the Sanfranciscana Basin), at Received in revised form the same locality as the type series of the species. The carapaces are very large, oval and elongated, with 4 May 2018 anteriorly located and slightly projected umbo, straight dorsal margin, with flattened growth bands and Accepted in revised form 22 June 2018 15e20 serrated growth lines. Details of the microscopic structure of the carapace were analysed under Available online 26 June 2018 scanning electron microscope for the first time, disclosing a unique reticular pattern of ornamentation. -
A Multiproxy Approach to Studying Lake Ecosystems in the Mesozoic
A multiproxy approach to studying lake ecosystems in the Mesozoic der Naturwissenschaftlichen Fakultät der Friedrich-Alexander-Universität Erlangen-Nürnberg zur Erlangung des Doktorgrades Dr. rer. nat. vorgelegt von Manja Hethke aus Greifswald A multiproxy approach to studying lake ecosystems in the Mesozoic Rekonstruktion mesozoischer Seeökosysteme: Ein Multiproxyansatz der Naturwissenschaftlichen Fakultät der Friedrich-Alexander-Universität Erlangen-Nürnberg zur Erlangung des Doktorgrades Dr. rer. nat. vorgelegt von Manja Hethke aus Greifswald Als Dissertation genehmigt von der Naturwissenschaftlichen Fakultät der Friedrich-Alexander-Universität Erlangen-Nürnberg Tag der mündlichen Prüfung: 11.12.2014 Vorsitzender des Promotionsorgans: Prof. Dr. Jörn Wilms Gutachter: Prof. Dr. Franz T. Fürsich Prof. Dr. Alexander Nützel Abstract The lake sediments of the Barremian to Aptian posits. The redox state of the lake has been resolved Yixian Formation of western Liaoning, China, have using pyrite framboid size distributions. Phase 2 received worldwide attention for their outstanding was governed by dysoxic bottom waters with spells fossil preservation and evolutionary significance. of anoxia. The lake was therefore characterized by Previous work on this Mesozoic fossillagerstätte mainly holomictic conditions that episodically al- has centred on feathered dinosaurs, early birds, and ternated with meromictic intervals. Spatial varia- early angiosperms. However, the physico-chemical tions in redox state were pronounced. Conversely, conditions that led to its formation and the response Phase 3 was marked by oxic conditions and an en- of palaeocommunities to varying environmental tirely holomictic lake. conditions, necessary to establish it as an important Clam-shrimp taxonomy of eastern Asia suffers window on Mesozoic lake evolution, are poorly un- from extreme oversplitting as phenotypic and on- derstood. -
Collections of the Natural History Museum of Lille. VIII
Collections of the Natural History Museum of Lille. VIII. - Diplostraca (Types and figured specimens) Marie Hennion, Jessie Cuvelier, Oscar Gallego, Oudoire Thierry, Daniel Vachard To cite this version: Marie Hennion, Jessie Cuvelier, Oscar Gallego, Oudoire Thierry, Daniel Vachard. Collections of the Natural History Museum of Lille. VIII. - Diplostraca (Types and figured specimens). Annales de la Société Géologique du Nord, 2015, 22 (2ème série), pp.109 - 118. hal-02403100 HAL Id: hal-02403100 https://hal.archives-ouvertes.fr/hal-02403100 Submitted on 18 Feb 2020 HAL is a multi-disciplinary open access L’archive ouverte pluridisciplinaire HAL, est archive for the deposit and dissemination of sci- destinée au dépôt et à la diffusion de documents entific research documents, whether they are pub- scientifiques de niveau recherche, publiés ou non, lished or not. The documents may come from émanant des établissements d’enseignement et de teaching and research institutions in France or recherche français ou étrangers, des laboratoires abroad, or from public or private research centers. publics ou privés. Ann. Soc. Géol. du Nord. T. 22 (2e série), p. 109-118, Décembre 2015. COLLECTIONS OF THE NATURAL HISTORY MUSEUM OF LILLE. VIII. — DIPLOSTRACA (TYPES AND FIGURED SPECIMENS) Les collections du Musée d'Histoire Naturelle de Lille. - VIII. — Diplostraca (Types et figurés) by Marie HENNION (*), Jessie CUVELIER (**), Oscar F. GALLEGO (***), Thierry OUDOIRE (****) & Daniel VACHARD (*****) Abstract. – The Diplostraca (also known as conchostracans; Arthropoda: Crustacea: Branchiopoda: Phyllopoda) are a group that were often collected in the coal basins of northern and eastern France, during the main period of activity of the coal industry (end of 19th Century to beginning of 20th Century); others were collected in Germany, Switzerland, Africa and Russia. -
Diplostraca (Types and Figured Specimens)
Ann. Soc. Géol. du Nord. T. 22 (2e série), p. 109-118, Décembre 2015. COLLECTIONS OF THE NATURAL HISTORY MUSEUM OF LILLE. VIII. — DIPLOSTRACA (TYPES AND FIGURED SPECIMENS) Les collections du Musée d'Histoire Naturelle de Lille. - VIII. — Diplostraca (Types et figurés) by Marie HENNION (*), Jessie CUVELIER (**), Oscar F. GALLEGO (***), Thierry OUDOIRE (****) & Daniel VACHARD (*****) Abstract. – The Diplostraca (also known as conchostracans; Arthropoda: Crustacea: Branchiopoda: Phyllopoda) are a group that were often collected in the coal basins of northern and eastern France, during the main period of activity of the coal industry (end of 19th Century to beginning of 20th Century); others were collected in Germany, Switzerland, Africa and Russia. Hence, the palaeontological collections of Lille (Natural History Museum of Lille and University of Lille) are espe- cially rich in specimens. This paper presents a reasoned catalogue of the types and figured specimens of the collection of the Natural History Museum of Lille, associated with a brief review of the Palaeozoic diplostracans, and some new or updated data in geology and palaeontology. Fossil Diplostraca are a rather neglected group, which appears however to be important in biostratigraphy, sequential stratigraphy, palaeoclimatology, palaeobiology, palaeoecology and palaeobiogeography during both principal stages of the Late Carboniferous (Pennsylvanian); i.e., during Moscovian (traditionally called Westphalian in western Europe) and Kasimovian times (traditionally called Stephanian). Résumé. – Les Diplostraca (autrefois appelés conchostracés ; Arthropoda : Crustacea : Branchiopoda : Phyllopoda) sont un groupe qui a fait l’objet de nombreuses récoltes dans les bassins houillers du nord et de l’est de la France, durant la période d’activité maximale des mines de charbon (c’est-à-dire de la fin du XIXe siècle au début du XXe) ; d’autres exemplaires ont été recueillis en Allemagne, en Suisse, en Afrique et en Russie. -
Clam Shrimp’ (Crustacea: Branchiopoda) As a Model Organism for the Study of Sexual System Evolution
Palaeontologia Electronica palaeo-electronica.org Sexual discrimination at work: Spinicaudatan ‘Clam Shrimp’ (Crustacea: Branchiopoda) as a model organism for the study of sexual system evolution T.I. Astrop, L.E. Park, B. Brown, and S.C. Weeks ABSTRACT Biological interactions are rarely preserved in the fossil record and where they do occur, are often difficult to discern. Therefore, the evolution of sexual systems over geologic time in animals has been difficult to investigate. The reproductively labile Spinicaudata ('clam shrimp') are a model clade for the study of sexual systems, containing dioecious (males and females), androdioecious (males and hermaphrodites) and self-fertilizing her- maphrodites. Herein we present a methodology in which mating systems can be inferred by the quantification of carapace shape differences attributable to sexual dimorphism in fossil specimens. We develop our methodology by comparing the carapaces of six species from two families of extant Spinicaudatans using eigenshape analyses. Sexual dimorphism was successfully quantified using morphometric techniques combined with discriminant analy- ses, correctly identifying males and females/hermaphrodites 92% of the time in extant taxa. Thirty-four specimens of the Jurassic clam shrimp Carapacetheria disgragaris were ana- lyzed utilizing the methods developed with extant species. From these fossil data, we were able to detect two distinct carapace shapes and assign 100% of individuals to either shape. The mean carapace shapes of the fossil specimens fit well with the average outlines for males and females in the extant species, enabling us to calculate a sex ratio of 51:49 males:females and thereby assign the sexual system of dioecy. This study begins to suc- cessfully utilize the fossil record of the Spinicaudata to elucidate ancient sexual systems, which will likely have far reaching implications for our understanding of the evolutionary dynamics of sexual systems over geologic timescales. -
The Evolutionary Dynamics of Sexual Systems in Deep Time: an Integrated
THE EVOLUTIONARY DYNAMICS OF SEXUAL SYSTEMS IN DEEP TIME: AN INTEGRATED BIOLOGICAL AND PALEONTOLOGICAL APPROACH A Dissertation Presented to The Graduate Faculty of The University of Akron In Partial Fulfillment of the Requirements for the Degree Doctor of Philosophy Timothy Ian Astrop August 2014 THE EVOLUTIONARY DYNAMICS OF SEXUAL SYSTEMS IN DEEP TIME: AN INTEGRATED BIOLOGICAL AND PALEONTOLOGICAL APPROACH Timothy Ian Astrop Dissertation Approved: Accepted: _______________________________ _______________________________ Advisor Department Chair Dr. Stephen C. Weeks Dr. Monte E. Turner _______________________________ _______________________________ Committee Member Dean of the College Dr. Lisa E. Park Dr. Chand Midha _______________________________ _______________________________ Committee Member Dean of the Graduate School Dr. Franscisco R. Moore Dr. George R. Newkome _______________________________ _______________________________ Committee Member Date Dr. Joel Duff _______________________________ Committee Member Dr. Peter Niewerowski ii ABSTRACT This doctoral dissertation reports the results of a multi-faceted investigation into the evolutionary dynamics of sexual systems over geologic time using the fossil record of the bivalved branchiopod crustacea in the Order Spinicaudata. The difficulty of assessing the sex of fossils (and by extension, the sexual system employed in extinct organisms) is widespread, and in those taxa that do show sexual dimorphism (e.g., ammonites, some arthropods, and vertebrates), reproductive mechanisms are often invariant, making assessments of reproductive evolution impossible. In this study, new techniques have been developed that will allow the identification of sexes in fossil crustaceans within the taxon Spinicaudata (“clam shrimp”): an enigmatic group of crustaceans with a unique bivalved carapace. Clam shrimp are well-represented in the fossil record, and have a broad array of reproductive types: dioecy (males + females), androdioecy (males + hermaphrodites) parthenogenesis (asexual females), and selfing hermaphroditism. -
A Unique Winged Euthycarcinoid from the Permian of Antarctica
Journal of Paleontology, 91(5), 2017, p. 987–993 Copyright © 2017, The Paleontological Society 0022-3360/17/0088-0906 doi: 10.1017/jpa.2017.28 A unique winged euthycarcinoid from the Permian of Antarctica Joseph H. Collette,1 John L. Isbell,2 and Molly F. Miller3 1Department of Geosciences, Minot State University, 500 University Ave West, Minot, North Dakota, 58707, USA 〈[email protected]〉 2Department of Geosciences, University of Wisconsin—Milwaukee, P.O. Box 413, 2200 E. Kenwood Blvd, Milwaukee, Wisconsin, 53201, USA 〈[email protected]〉 3Department of Earth and Environmental Sciences, Vanderbilt University, 5726 Stevenson Center, 7th Floor, Nashville, Tennessee, 37240, USA 〈[email protected]〉 Abstract.—Euthycarcinoid arthropods (Cambrian–Triassic) were likely the first animals to transition from oceanic to freshwater and emergent environments. Although their basic bauplan is well known, they have a poor fossil record because their non-sclerotized exoskeleton was rarely preserved. Euthycarcinoids’ unusual morphology (varying numbers of body segments, seemingly dichotomous possession of either mandibles or a labrum, specialized or generalized limbs, and possession by some euthycarcinoid species of sternal pores—structures possibly analogous to coxal vesicles in myriapods) contribute to uncertainty regarding their relationship to other arthropod groups; while their poor fossil record masks the evolutionary transitions within and between the separate realms they inhabited (marine, freshwater, emergent). A new euthycarcinoid from a Permian polar proglacial lake is described herein that is morphologically unlike all other euthycarcinoids, and interpreted as being well adapted for a nekton-benthic lifestyle. Antarcticarcinus pagoda n. gen. n. sp. possesses a pair of large wing-like processes that project laterally from the preabdominal dorsal exoskeleton. -
Diplostraca (Types and Figured Specimens) Jessie Cuvelier, Marie Hennion, Oscar Gallego, Daniel Vachard
Palaeontological Collections of Lille University - Sciences and Technologies. II - Diplostraca (types and figured specimens) Jessie Cuvelier, Marie Hennion, Oscar Gallego, Daniel Vachard To cite this version: Jessie Cuvelier, Marie Hennion, Oscar Gallego, Daniel Vachard. Palaeontological Collections of Lille University - Sciences and Technologies. II - Diplostraca (types and figured specimens). Annales de la Société Géologique du Nord, 2015, 22 (2ème série), pp.119-134. hal-02401846 HAL Id: hal-02401846 https://hal.archives-ouvertes.fr/hal-02401846 Submitted on 18 Feb 2020 HAL is a multi-disciplinary open access L’archive ouverte pluridisciplinaire HAL, est archive for the deposit and dissemination of sci- destinée au dépôt et à la diffusion de documents entific research documents, whether they are pub- scientifiques de niveau recherche, publiés ou non, lished or not. The documents may come from émanant des établissements d’enseignement et de teaching and research institutions in France or recherche français ou étrangers, des laboratoires abroad, or from public or private research centers. publics ou privés. Ann. Soc. Géol. du Nord. T. 22 (2e série), p. 119-134, Décembre 2015. PALAEONTOLOGICAL COLLECTIONS OF LILLE UNIVERSITY – SCIENCES AND TECHNOLOGIES. II — DIPLOSTRACA (TYPES AND FIGURED SPECIMENS) Collections paléontologiques de l'Université de Lille – Sciences et Technologies. II — Diplostraca (types et figurés) by Jessie CUVELIER (*), Marie HENNION (**), Oscar GALLEGO (***) & Daniel VACHARD (****) Abstract. – An exceptional collection of Diplostraca (Spinicaudata, Leaiina) from various geographic localities all around the world and from Devonian to Jurassic beds, is re-described in this catalogue. Despite some imperfections due to the geopolitical climate of the epoch (the Cold War), the great value of the Defretin’s and Novozhilov’s work is confirmed. -
The Carboniferous Evolution of Nova Scotia
Downloaded from http://sp.lyellcollection.org/ by guest on October 6, 2021 The Carboniferous evolution of Nova Scotia J. H. CALDER Nova Scotia Department of Natural Resources, PO Box 698, Halifax, Nova Scotia, Canada B3J 2T9 Abstract: Nova Scotia during the Carboniferous lay at the heart of palaeoequatorial Euramerica in a broadly intermontane palaeoequatorial setting, the Maritimes-West-European province; to the west rose the orographic barrier imposed by the Appalachian Mountains, and to the south and east the Mauritanide-Hercynide belt. The geological affinity of Nova Scotia to Europe, reflected in elements of the Carboniferous flora and fauna, was mirrored in the evolution of geological thought even before the epochal visits of Sir Charles Lyell. The Maritimes Basin of eastern Canada, born of the Acadian-Caledonian orogeny that witnessed the suture of Iapetus in the Devonian, and shaped thereafter by the inexorable closing of Gondwana and Laurasia, comprises a near complete stratal sequence as great as 12 km thick which spans the Middle Devonian to the Lower Permian. Across the southern Maritimes Basin, in northern Nova Scotia, deep depocentres developed en echelon adjacent to a transform platelet boundary between terranes of Avalon and Gondwanan affinity. The subsequent history of the basins can be summarized as distension and rifting attended by bimodal volcanism waning through the Dinantian, with marked transpression in the Namurian and subsequent persistence of transcurrent movement linking Variscan deformation with Mauritainide-Appalachian convergence and Alleghenian thrusting. This Mid- Carboniferous event is pivotal in the Carboniferous evolution of Nova Scotia. Rapid subsidence adjacent to transcurrent faults in the early Westphalian was succeeded by thermal sag in the later Westphalian and ultimately by basin inversion and unroofing after the early Permian as equatorial Pangaea finally assembled and subsequently rifted again in the Triassic. -
Testing Weissman's Lineage Selection
Zoological Studies 59:34 (2020) doi:10.6620/ZS.2020.59-34 Special Issue: Fossil and Modern Clam Shrimp (Branchiopoda: Spinicaudata, Laevicaudata) Open Access Testing Weissman’s Lineage Selection Model for the Maintenance of Sex: The Evolutionary Dynamics of Clam Shrimp Reproduction over Geologic Time Timothy I. Astrop1,*, Lisa Park Boush2, and Stephen C. Weeks3 1Fossil Forest Project, Blast Road, Brymbo, Wales, United Kingdom, LI11 5BT. *Correspondence: E-mail: [email protected] (Astrop) 2Department of Geosciences, University of Connecticut, Storrs, CT 06269-1045, USA. E-mail: [email protected] (Park Boush) 3Department of Biology, The University of Akron, Akron, OH 44325-3908, USA. E-mail: [email protected] (Weeks) Received 11 June 2020 / Accepted 15 June 2020 / Published 5 August 2020 Special issue (articles 32-46) communicated by Thomas A. Hegna and D. Christopher Rogers One of the most perplexing questions within evolutionary biology is: “why are there so many methods of reproduction?” Contemporary theories assume that sexual reproduction should allow long term survival as dispersal and recombination of genetic material provides a population of organisms with the ability to adapt to environmental change. One of the most frustrating aspects of studying the evolution of reproductive systems is that we have not yet been able to utilize information locked within the fossil record to assess breeding system evolution in deep time. While the fossil record provides us with information on an organism’s living environment, as well as some