Results 161 to 170 of about 1,128 (190)

TERMINOLOGY OF PALEOZOIC PLACODERM FISHES (ANTIARCHI) EXOSKELETAL ELEMENTS

THE LIFE OF THE EARTH, 2021
The terminology and morphology of plates of the posterior part of the antiarch head shield (Placodermi, Antiarchi) are discussed. The terms «zatilochnaya» and «bokovaya (kraevaya) zatilochnaya» was previously accepted in antiarch skulls and are suggested for use in Russian-language literature.
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Placoderm interrelationships: a new interpretation, with a short review of placoderm classifications

1984
(Uploaded by Plazi from the Biodiversity Heritage Library) No abstract provided.
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XV.—The Paired Fins of Placoderms

Transactions of the Royal Society of Edinburgh, 1947
Within the last twenty years our knowledge of the structure and distribution of the armoured Placodermi (including Arthrodira, Ptyctodonta, Phyllolepida, Macropetalichthyida, Rhenanida, and Antiarcha) has increased tremendously. The writer is engaged on a morphogenetic analysis of the group, early publication of which is uncertain.
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Histologic Studies of Ostracoderms, Placoderms and Fossil Elasmobranchs

Zoologica Scripta, 1980
An account is given of the structure and growth of certain ptyctodontid tooth plates, especially those of Ctenurella gladbachensis, based on study by light microscopy and the SEM. These tooth plates consist of a framework of acellular bone tissue and an interior hard tissue referred to as pleromin.
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Dynamics of placoderm distribution in the Prague Basin (Czech Republic)

GFF, 2014
The occurrence of placoderms in the Prague Basin (Bohemian Massif; Czech Republic) shows a very unsteady distribution in space and time. The most abundant specimens are in the Lochkovian and, through decrease in the Pragian, they become rare towards the Givetian.
Valéria Vaškaninová, Petr Kraft
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Placoderm fishes: diversity through time

1991
Abstract The placoderms, with 250 genera, constitute a small but much diversified group of bony fishes. They are sometimes classified as stem-group osteichthyans and, together with the acanthodians, are the earliest true jawed fishes. They are found in the mid-Silurian, but flourished in the Devonian reaching their greatest diversity in ...
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The first placoderm fish from the Lower Devonian of Poland

Journal of Vertebrate Paleontology, 2015
Fossils remains of placoderms are so characteristic for the Lower Devonian deposits in the Holy Cross Mountains, central Poland (Gurich, 1896), that these rocks are colloquially named the ‘Placoder...
Piotr Szrek, Marek Dec, Grzegorz Niedźwiedzki   +2 more
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Ventral Thoracic Neuromast Lines of Placoderm Fishes

Nature, 1965
IN the past forty years, following Stenso's1 pioneer work on the arthrodire Macropetalichthys, much information has come to light in support of the view that the Palaeozoic placoderms and the still surviving elasmo-branchs and holocephalians are more closely related to each other than to any other group of fishes2.
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New placoderm fishes from the Late Devonian of South Africa

Journal of Vertebrate Paleontology, 1997
ABSTRACT New placoderm fishes are described from a black shale lens in the Famennian Witpoort Formation, near Grahamstown, South Africa. Arthrodires include a new species of Groenlandaspis, G. riniensis sp. nov., a new genus of groenlandaspidid, Africanaspis doryssa gen. et sp. nov., and a new species of the antiarch Bothriolepis, B. africana sp.
Long, John A, Anderson, M Eric, Gess, Robert W, Hiller, Norton   +3 more
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Les affinités des placodermes, une revue des hypothèses actuelles

Geobios, 1982
Resume Les relations phyletiques des Placodermes sont revues a la lumiere des decouvertes de cette derniere decennie, en utilisant la methodologie cladistique. Les opinions concernant la monophylie ou la paraphylie des Placodermes sont presentees et discutees.
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