Hemicyclaspis (lit.'half-round shield' or 'semicircle plate') is an extinct genus of primitive jawless fish, closely related to Cephalaspis, that lived in the Late Silurian (Pridoli)[1] to Devonian period in what is now Europe and North America. A typical cephalaspid, Hemicyclaspis had a heavily armored, shovel-shaped headshield. It is thought to have been a better swimmer than most of its relatives because of its powerful tail, stabilizing dorsal fin and the keel-shaped hydrodynamic edges of its head shield. Hemicyclaspis probably foraged the ocean floor for food.[2]
Parker, Steve. Dinosaurus: the complete guide to dinosaurs. Firefly Books Inc, 2003. Pg. 58
^Blieck, Alain; Elliott, David K. (2017-06-01). "Pteraspidomorphs (Vertebrata), the Old Red Sandstone, and the special case of the Brecon Beacons National Park, Wales, U.K." Proceedings of the Geologists' Association. 128 (3): 438–446. doi:10.1016/j.pgeola.2016.07.003. ISSN 0016-7878.
^Palmer, D., ed. (1999). The Marshall Illustrated Encyclopedia of Dinosaurs and Prehistoric Animals. London: Marshall Editions. p. 25. ISBN1-84028-152-9.
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hemicyclaspis, half, round, shield, semicircle, plate, extinct, genus, primitive, jawless, fish, closely, related, cephalaspis, that, lived, late, silurian, pridoli, devonian, period, what, europe, north, america, typical, cephalaspid, heavily, armored, shovel. Hemicyclaspis lit half round shield or semicircle plate is an extinct genus of primitive jawless fish closely related to Cephalaspis that lived in the Late Silurian Pridoli 1 to Devonian period in what is now Europe and North America A typical cephalaspid Hemicyclaspis had a heavily armored shovel shaped headshield It is thought to have been a better swimmer than most of its relatives because of its powerful tail stabilizing dorsal fin and the keel shaped hydrodynamic edges of its head shield Hemicyclaspis probably foraged the ocean floor for food 2 HemicyclaspisTemporal range Pridoli Early Devonian PreꞒ Ꞓ O S D C P T J K Pg N H murchisoni and Thyestes Scientific classification Domain Eukaryota Kingdom Animalia Phylum Chordata Class Osteostraci Order Atelaspidiformes Family Ateleaspididae Genus Hemicyclaspis Hemicyclaspis grew to a length of 5 inches 13 centimeters and would most likely have fed on particles from the muddy sea bed Life reconstruction of Hemicyclaspis murchisoniReferences edit nbsp Paleontology portal Parker Steve Dinosaurus the complete guide to dinosaurs Firefly Books Inc 2003 Pg 58 Blieck Alain Elliott David K 2017 06 01 Pteraspidomorphs Vertebrata the Old Red Sandstone and the special case of the Brecon Beacons National Park Wales U K Proceedings of the Geologists Association 128 3 438 446 doi 10 1016 j pgeola 2016 07 003 ISSN 0016 7878 Palmer D ed 1999 The Marshall Illustrated Encyclopedia of Dinosaurs and Prehistoric Animals London Marshall Editions p 25 ISBN 1 84028 152 9 nbsp This article related to a Devonian jawless fish is a stub You can help Wikipedia by expanding it vte Retrieved from https en wikipedia org w index php title Hemicyclaspis amp oldid 1193897808, wikipedia, wiki, book, books, library,
