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Holoptychius

May 08, 2024

Holoptychius (from Greek: όλος holos, 'whole' and Greek: πτυχή ptyche 'fold')[1] is an extinct genus of porolepiform lobe-finned fish from the Middle Devonian to Carboniferous (Mississippian) periods. It is known from fossils worldwide. The genus was first described by Louis Agassiz in 1839.[2]

Holoptychius
Temporal range: Late Devonian-Mississippian
~383–318 Ma
Fossil of H. quebecensis in the Field Museum of Natural History, Chicago
Scientific classification
Domain: Eukaryota
Kingdom: Animalia
Phylum: Chordata
Clade: Sarcopterygii
Class: Porolepimorpha
Order: †Porolepiformes
Family: †Holoptychiidae
Genus: †Holoptychius
Agassiz 1839
Type species
Holoptychius nobilissimus
Species
  • H. americanus
  • H. andersoni
  • H. flemingi
  • H. giganteus
  • H. halli
  • H. hopkinsii
  • H. nobilissimus
  • H. quebecensis

Description edit

Holoptychius was a streamlined predator about 50 centimetres (20 in) long (though largest specimen could grew up to 2.5 metres (8.2 ft)), which fed on other bony fish. Its rounded scales and body form indicate that it could have swum quickly through the water to catch prey.[3][4] Similar to other rhipidistians, it had fang-like teeth on its palate in addition to smaller teeth on the jaws. Its asymmetrical tail sported a caudal fin on its lower end. To compensate for the downward push caused by this fin placement, the pectoral fins of Holoptychius were placed high on the body.

Species edit

Of the genus Holoptychius the following species have been described:[2]

Distribution edit

Fossils of Holoptychius have been found in the Mississippian of the United Kingdom and the Devonian of Belgium, Colombia (Cuche Formation, Boyacá),[8][7] Norway, Canada,[5][6] the Russian Federation, and the United States (Pennsylvania).[9]

Gallery edit

  •  
    H. andersoni
  •  
    Life restoration of Holoptychius sp.
  •  
    H. nobilissimus and scale

References edit

  1. ^ Roberts, George (1839). An etymological and explanatory dictionary of the terms and language of geology. London: Longman, Orme, Brown, Green, & Longmans. p. 78. Retrieved 30 December 2021.
  2. ^ a b Species Holoptychius
  3. ^ Palmer, D., ed. (1999). The Marshall Illustrated Encyclopedia of Dinosaurs and Prehistoric Animals. London: Marshall Editions. p. 43. ISBN 1-84028-152-9.
  4. ^ Holland, Timothy (2010). (PDF). Memoirs of Museum Victoria. 67: 35–44. doi:10.24199/j.mmv.2010.67.04. Archived from the original (PDF) on March 4, 2016. Retrieved 2017-04-04.
  5. ^ a b Downs, Jason P.; Daeschler, Edward B.; Jenkins, Farish A.; Shubin, Neil H. (2013-03). "Holoptychius bergmannisp. nov. (Sarcopterygii, Porolepiformes) from the Upper Devonian of Nunavut, Canada, and a Review ofHoloptychiusTaxonomy". Proceedings of the Academy of Natural Sciences of Philadelphia. 162 (1): 47–59. doi:10.1635/053.162.0104. ISSN 0097-3157.
  6. ^ a b Miller, Randall F.; Brazeau, Martin D. (2007-01-01). "A Late Devonian porolepiform fish (Holoptychius) and the age of the kennebecasis formation, southern New Brunswick, Canada". Atlantic Geology. 43: 187–197. doi:10.4138/5650.
  7. ^ a b Mondéjar-Fernández, Jorge; Janvier, Philippe (2014-10-01). "Further evidence for the presence of holoptychiid porolepiforms (Sarcopterygii, Dipnomorpha) from the Frasnian of Colombia". Comptes Rendus Palevol. 13 (7): 587–597. Bibcode:2014CRPal..13..587M. doi:10.1016/j.crpv.2014.03.009. ISSN 1631-0683.
  8. ^ Janvier & Villarroel, 1998
  9. ^ Holoptychius at Fossilworks.org

Bibliography edit

  • Janvier, Philippe; Villarroel A, Carlos (1998). "Los Peces Devónicos del Macizo de Floresta (Boyacá, Colombia). Consideraciones taxonómicas, bioestratigráficas, biogeográficas y ambientales". Geología Colombiana. 23: 3–18. Retrieved 2017-03-31.

  Media related to Holoptychius at Wikimedia Commons


 

This article about a prehistoric lobe-finned fish is a stub. You can help Wikipedia by expanding it.

May 08, 2024
holoptychius, from, greek, όλος, holos, whole, greek, πτυχή, ptyche, fold, extinct, genus, porolepiform, lobe, finned, fish, from, middle, devonian, carboniferous, mississippian, periods, known, from, fossils, worldwide, genus, first, described, louis, agassiz. Holoptychius from Greek olos holos whole and Greek ptyxh ptyche fold 1 is an extinct genus of porolepiform lobe finned fish from the Middle Devonian to Carboniferous Mississippian periods It is known from fossils worldwide The genus was first described by Louis Agassiz in 1839 2 HoloptychiusTemporal range Late Devonian Mississippian 383 318 Ma PreꞒ Ꞓ O S D C P T J K Pg N Fossil of H quebecensis in the Field Museum of Natural History Chicago Scientific classification Domain Eukaryota Kingdom Animalia Phylum Chordata Clade Sarcopterygii Class Porolepimorpha Order Porolepiformes Family Holoptychiidae Genus HoloptychiusAgassiz 1839 Type species Holoptychius nobilissimus Species H americanus H andersoni H flemingi H giganteus H halli H hopkinsii H nobilissimus H quebecensis Contents 1 Description 2 Species 3 Distribution 4 Gallery 5 References 5 1 BibliographyDescription editHoloptychius was a streamlined predator about 50 centimetres 20 in long though largest specimen could grew up to 2 5 metres 8 2 ft which fed on other bony fish Its rounded scales and body form indicate that it could have swum quickly through the water to catch prey 3 4 Similar to other rhipidistians it had fang like teeth on its palate in addition to smaller teeth on the jaws Its asymmetrical tail sported a caudal fin on its lower end To compensate for the downward push caused by this fin placement the pectoral fins of Holoptychius were placed high on the body Species editOf the genus Holoptychius the following species have been described 2 H americanus H andersoni H bergmanni Downs et al 2013 from the Frasnian aged Fram Formation of Ellesmere Island Arctic Canada 5 H flemingi H giganteus H halli H hopkinsii H nobilissimus H quebecensis citation needed H sp indet from the Kennebecasis Formation of New Brunswich Canada 6 H sp indet from the Cuche Formation of Colombia known from an isolated tooth UN DG PALV86 and preserved scales UN DG PALV50 51 7 Distribution editFossils of Holoptychius have been found in the Mississippian of the United Kingdom and the Devonian of Belgium Colombia Cuche Formation Boyaca 8 7 Norway Canada 5 6 the Russian Federation and the United States Pennsylvania 9 Gallery edit nbsp H andersoni nbsp Life restoration of Holoptychius sp nbsp H nobilissimus and scaleReferences edit nbsp Paleontology portal nbsp Fish portal Roberts George 1839 An etymological and explanatory dictionary of the terms and language of geology London Longman Orme Brown Green amp Longmans p 78 Retrieved 30 December 2021 a b Species Holoptychius Palmer D ed 1999 The Marshall Illustrated Encyclopedia of Dinosaurs and Prehistoric Animals London Marshall Editions p 43 ISBN 1 84028 152 9 Holland Timothy 2010 Upper Devonian osteichthyan remains from the Genoa River Victoria Australia PDF Memoirs of Museum Victoria 67 35 44 doi 10 24199 j mmv 2010 67 04 Archived from the original PDF on March 4 2016 Retrieved 2017 04 04 a b Downs Jason P Daeschler Edward B Jenkins Farish A Shubin Neil H 2013 03 Holoptychius bergmannisp nov Sarcopterygii Porolepiformes from the Upper Devonian of Nunavut Canada and a Review ofHoloptychiusTaxonomy Proceedings of the Academy of Natural Sciences of Philadelphia 162 1 47 59 doi 10 1635 053 162 0104 ISSN 0097 3157 a b Miller Randall F Brazeau Martin D 2007 01 01 A Late Devonian porolepiform fish Holoptychius and the age of the kennebecasis formation southern New Brunswick Canada Atlantic Geology 43 187 197 doi 10 4138 5650 a b Mondejar Fernandez Jorge Janvier Philippe 2014 10 01 Further evidence for the presence of holoptychiid porolepiforms Sarcopterygii Dipnomorpha from the Frasnian of Colombia Comptes Rendus Palevol 13 7 587 597 Bibcode 2014CRPal 13 587M doi 10 1016 j crpv 2014 03 009 ISSN 1631 0683 Janvier amp Villarroel 1998 Holoptychius at Fossilworks org Bibliography edit Janvier Philippe Villarroel A Carlos 1998 Los Peces Devonicos del Macizo de Floresta Boyaca Colombia Consideraciones taxonomicas bioestratigraficas biogeograficas y ambientales Geologia Colombiana 23 3 18 Retrieved 2017 03 31 nbsp Media related to Holoptychius at Wikimedia Commons nbsp This article about a prehistoric lobe finned fish is a stub You can help Wikipedia by expanding it vte Retrieved from https en wikipedia org w index php title Holoptychius amp oldid 1164311887, wikipedia, wiki, book, books, library,

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