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Informationen zum Autor Ulf J. Borgen is the editor of Morphology, Phylogeny and Taxonomy of Osteolepiform Fish , published by Wiley. Hans A. Nakrem is the editor of Morphology, Phylogeny and Taxonomy of Osteolepiform Fish , published by Wiley. Klappentext A discussion and description of prehistoric fish within an international series Material of six osteolepiform genera is described in Morphology, Phylogeny and Taxonomy of Osteolepiform Fish . This publication is Number 61 within the Fossils and Strata series. The international Fossils and Strata series features monographs in palaeontology and biostratigraphy with taxonomic descriptions. The series is owned by and published on behalf of The Lethaia Foundation in cooperation with the Scandinavian countries. Inhaltsverzeichnis Introduction 1 General taxonomy 2 'Crossoptgerygii' and 'Rhipidistia' 2 Osteolepiform subdivisions 3 Terminology 4 Cranial roof 4 Endocranium 13 Dermal bones in mouth roof 13 Lower jaw 14 Operculo-gular bones 15 Upper Palaeozoic fossil locality in the Oslo Region 16 Stratigraphy 16 Descriptions 18 Material, methods and repository 18 Genus Askerichthys n gen 20 Askerichthys heintzi n sp 20 Genus Megalichthys Agassiz, 1835 62 Megalichthys cf M hibberti Agassiz, 1835 62 Megalichthys pygmaeus Tranquair, 1879 97 Megalichthys syndentolaminaris n sp 99 Genus Latvius Jarvik, 1948 100 Latvius grewingki (Gross, 1933) 101 Latvius deckerti Jensen, 1966 114 Latvius sp Jensen, 1966 121 Latvius cf L niger Jensen, 1973 128 Genus Osteolepis Agassiz, 1835 130 Osteolepis macrolepidotus Agassiz, 1835 131 Genus Gyroptychius McCoy, 1848 131 Gyroptychius milleri (Jarvik, 1948) 131 Gyroptychius groenlandicus Jarvik, 1950a 141 Morphologic comparisons and discussions 160 Fronto-ethmoidal shield 160 General shape 160 Interpremaxilla 162 Composition of naso-rostro-premaxillary complex 162 Shape of upper mouth margin 165 Anterior palatal (premaxillary and rostral) teeth and palatal processes 166 Defi nitions and occurrences of morphotypes of anterior palatal teeth 166 Tooth replacement and evolutionary relationship between the anterior palatal dental morphotypes 167 Number of premaxillary teeth 169 Systematic significance of anterior palatal teeth 170 Anterior palatal processes 171 Postrostrals 172 Variation and trends in postrostral pattern 172 Taxonomic significance of postrostral pattern 176 Nasals 178 Number of nasal bones 178 Positions of the bones in the nasal series 178 Circumnarial dermal bones and supraorbitals 180 Variation in eusthenopterids 180 Reconstructing the circumnarial pattern in Osteolepis macrolepidotus 186 Reconstructing the pattern of supraorbitals in Osteolepis macrolepidotus 188 Circumnarial and supraorbital pattern in other Devonian osteolepiforms 189 Homologizations of circumnarial bones in Megalichthys hibberti, Ectosteorhachis, Askerichthys and Cladarosymblema 191 Supraorbito-tectal series of panderichthyids 196 Frontals and dermosphenotics 197 Shape and composition of frontals 197 Shape, positions and extension of dermosphenotic bones 199 Fenestrae 199 Position of nasal fenestra 199 Shape of nasal fenestra 200 Processus dermintermedius 201 Tubercles in nasal fenestra 202 Presence or absence of pineal openings 202 Position of pineal foramen 203 Shape of pineal openings 204 Size of pineal fenestra and presence of pineal plates 204 Sensory canals 204 Pitlines 205 Parietal sh...
