By Karl Albert Frickhinger
Publication by means of Frickhinger, Karl Albert
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Extra info for Fossil atlas, fishes
109 AGNATHA Order: Anaspidiformes Family: Birkeniidae? J awless Fish e s J awless Fishes �GNATHA diformes order: Anaspiiolepididae? Ende fall1i1y: . -- Unnamed anaspid (length c. 1 5 cm) from the Middle Silurian of Cornwallis I slan , Northwest Territories, Canada. Original: Thorsteinsson Collection, Calgary, Albe a, Canad a . Genus: Horizon: Genus: Legendre/epis Unnamed. M iddle Silurian . Geographical distribution: Horizon: Northern North America. Features: Relatively large anaspids . G reatest length 1 5 cm or more.
They had their widest distribution at the time when they died out. They had no descendants. Up to the present, so e 200 genera have been described, mostly on the basis of isolated plates of the armour. Complete fishes are very rare. distribution of placoderms in geological time. changed after 116 MULLER 11 7 Placoderms PLACODERMI Order: Stensioelliformes Family: Stensioellidae PLACODERMI Or der: Rhenaniformes family: Asterosteidae Placoderms - Stensioeiia heintzi BROILI (length c. 26 cm) from the Lower Devonian of Bun en bach, Rhineland , Germany.
1 2 cm. Remarks: Partly bottom-dwelling, partly free-swimming. Recent relatives: None. Died out in the Lower Devonian. Remarks : Probably free-swim ming . Recent relatives : None. Died out in the Lower Devonian. BENDiX-ALMGREN. 5 em) from the Lower Devonian of Bennevis, Spitzbergen . Original: Paleontologisk Museum, Oslo, Norway. G e n u s : Poraspis KIAER, 1930 . Jawless Fishes G NATHAidiformes . pterasp Otd�rly'.. EY (length c . 20 cm) from the L�wer : National Museum of Onglnal . Canada ies, Territor st Northwe Island, Prince of Wales Ontan o, Cana da.
Fossil atlas, fishes by Karl Albert Frickhinger