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Holoptychius Greek : όλος holos Greek : πτυχή ptyche [1] 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]
Description
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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] 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
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Of the genus Holoptychius the following species have been described:[2]
Distribution
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Fossils of Holoptychius have been found in the Mississippian of the United Kingdom and the Devonian of Belgium, Colombia (Cuche Formation , Boyacá ),[8] [7] [5] [6] [9]
Gallery
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References
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^ 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 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 doi :10.4138/5650
^ 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 .
^ Janvier & Villarroel, 1998
^ Holoptychius at Fossilworks .org
Bibliography
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Holoptychius at Wikimedia Commons
t
e
R e t r i e v e d f r o m " https://en.wikipedia.org/w/index.php?title=Holoptychius&oldid=1164311887 " C a t e g o r i e s : ● P o r o l e p i f o r m e s ● L a t e D e v o n i a n f i s h ● C a r b o n i f e r o u s f i s h ● D e v o n i a n f i s h o f E u r o p e ● D e v o n i a n f i s h o f N o r t h A m e r i c a ● P r e h i s t o r i c f i s h o f S o u t h A m e r i c a ● D e v o n i a n a n i m a l s o f S o u t h A m e r i c a ● D e v o n i a n C o l o m b i a ● F o s s i l s o f C o l o m b i a ● F o s s i l t a x a d e s c r i b e d i n 1 8 3 9 ● T a x a n a m e d b y L o u i s A g a s s i z ● P r e h i s t o r i c l o b e - f i n n e d f i s h s t u b s H i d d e n c a t e g o r i e s : ● A r t i c l e s w i t h s h o r t d e s c r i p t i o n ● S h o r t d e s c r i p t i o n i s d i f f e r e n t f r o m W i k i d a t a ● A r t i c l e s w i t h ' s p e c i e s ' m i c r o f o r m a t s ● A r t i c l e s c o n t a i n i n g G r e e k - l a n g u a g e t e x t ● A l l a r t i c l e s w i t h u n s o u r c e d s t a t e m e n t s ● A r t i c l e s w i t h u n s o u r c e d s t a t e m e n t s f r o m A p r i l 2 0 1 7 ● C o m m o n s c a t e g o r y l i n k i s o n W i k i d a t a ● A l l s t u b a r t i c l e s
● T h i s p a g e w a s l a s t e d i t e d o n 8 J u l y 2 0 2 3 , a t 1 8 : 5 8 ( U T C ) . ● T e x t i s a v a i l a b l e u n d e r t h e C r e a t i v e C o m m o n s A t t r i b u t i o n - S h a r e A l i k e L i c e n s e 4 . 0 ;
a d d i t i o n a l t e r m s m a y a p p l y . B y u s i n g t h i s s i t e , y o u a g r e e t o t h e T e r m s o f U s e a n d P r i v a c y P o l i c y . W i k i p e d i a ® i s a r e g i s t e r e d t r a d e m a r k o f t h e W i k i m e d i a F o u n d a t i o n , I n c . , a n o n - p r o f i t o r g a n i z a t i o n . ● P r i v a c y p o l i c y ● A b o u t W i k i p e d i a ● D i s c l a i m e r s ● C o n t a c t W i k i p e d i a ● C o d e o f C o n d u c t ● D e v e l o p e r s ● S t a t i s t i c s ● C o o k i e s t a t e m e n t ● M o b i l e v i e w
Media related to Holoptychius at Wikimedia Commons
