Ostracoderm
Ordovician, Cephalaspidomorphi, Ostracodermi, Devonian Period
Herausgegeben: Eglantine, Cornelia C.
Versandkostenfrei!
Versandfertig in 6-10 Tagen
26,99 €
inkl. MwSt.
PAYBACK Punkte
13 °P sammeln!
Please note that the content of this book primarily consists of articles available from Wikipedia or other free sources online. Ostracoderms are any of several groups of extinct, primitive, jawless fishes that were covered in an armor of bony plates. They belong to the taxon Ostracodermi, and their fossils are found in the Ordovician and Devonian Period strata of North America and Europe. They were often less than 30 cm (1 ft) long and were probably slow, bottom-dwelling animals. Another innovation of ostracoderms was the use of gills not for feeding, but exclusively for respiration. Earlier c...
Please note that the content of this book primarily consists of articles available from Wikipedia or other free sources online. Ostracoderms are any of several groups of extinct, primitive, jawless fishes that were covered in an armor of bony plates. They belong to the taxon Ostracodermi, and their fossils are found in the Ordovician and Devonian Period strata of North America and Europe. They were often less than 30 cm (1 ft) long and were probably slow, bottom-dwelling animals. Another innovation of ostracoderms was the use of gills not for feeding, but exclusively for respiration. Earlier chordates with gills used them for both respiration and feeding. Ostracoderms had separate pharyngeal gill pouches along the side of the head, which were permanently open with no protective operculum.
Andere Kunden interessierten sich für
