Kujdanowiaspis consists of three species, all described in 1934: Kujdanowiaspis buczacziensis (type species), Kujdanowiapsis podolica, and Kudjanowiaspis rectiformis - although the independent status of K. rectiformis is in doubt, and is instead most likely K. podolica.[4][5][6]Kujdanowiaspis zychi was also named and described by Stensiö in 1945, but was reassigned to the new genusErikaspis in 2007.[4][5]
Because of the poor preservation of Kujdanowiaspis fossils, little is known about its physiology. What is known about it is typical of actinolepid placoderms, and it can compared to the better known primitive arthrodires such as Dicksonosteus or Actinolepis. It had a very pronounced, serrated spinal plate, giving it an almost lunate dorsal silhouette.[4]
The body of Kujdanowiaspis is slightly wider than high, with large spinal plates protruding laterally, suggesting a benthic lifestyle. The body armour of the genus Erikaspis is much flatter.[5]
Its jaws were comparatively underdeveloped in comparison to the more robust-jawed arthrodires that would come after it, such as Dunkleosteus and Coccosteus, indicating that it likely subsisted primarily on smaller, softer-bodied animals such as mollusks or worms instead of larger, tougher prey animals.
Referencesedit
^Dupret, Vincent; Carls, Peter; Martínez-Pérez, Carlos; Botella, Héctor (2011-10-01). "First Perigondwanan record of actinolepids (Vertebrata: Placodermi: Arthrodira) from the Lochkovian (Early Devonian) of Spain and its palaeobiogeographic significance". Palaeogeography, Palaeoclimatology, Palaeoecology. 310 (3): 273–282. doi:10.1016/j.palaeo.2011.07.019. ISSN 0031-0182.
^Dupret, Vincent; Blieck, Alain (2009-01-01). "The Lochkovian–Pragian boundary in Podolia (Lower Devonian, Ukraine) based upon placoderm vertebrates". Comptes Rendus Geoscience. 341 (1): 63–70. doi:10.1016/j.crte.2008.09.007. ISSN 1631-0713.
^Szrek, Piotr; Dupret, Vincent (2017). "Placoderms from the Early Devonian "placoderm sandstone" of the Holy Cross Mountains, Poland with biostratigraphical and palaeobiogeographical implications". Acta Palaeontologica Polonica. 62. doi:10.4202/app.00395.2017. hdl:1885/204872.
^ abcdDupret, Vincent (2010). "Revision of the genus Kujdanowiaspis Stensiö, 1942 (Placodermi, Arthrodira, "Actinolepida") from the Lower Devonian of Podolia (Ukraine)". Geodiversitas. 32 (1): 5–63. doi:10.5252/g2010n1a1. S2CID 129505974.
^ abcDupret, Vincent; Goujet, Daniel; Mark-Kurik, Elga (2007). "A New Genus of Placoderm (Arthrodira: 'Actinolepida') from the Lower Devonian of Podolia (Ukraine)". Journal of Vertebrate Paleontology. 27 (2): 266–284. ISSN 0272-4634.
^Dupret, Vincent; Sanchez, Sophie; Goujet, Daniel; Ahlberg, Per Erik (7 Feb 2017). "The internal cranial anatomy of Romundina stellina Ørvig, 1975 (Vertebrata, Placodermi, Acanthothoraci) and the origin of jawed vertebrates—Anatomical atlas of a primitive gnathostome". PLoS One. 12 (2): 266–284. doi:10.1371/journal.pone.0171241. PMC5295682. PMID 28170434.
^Dupret, V.; Zhu, M. I. N.; Wang, J. N. Q. (2009). "The morphology of Yujiangolepis liujingensis (Placodermi, Arthrodira) from the Pragian of Guangxi (south China) and its phylogenetic significance". Zoological Journal of the Linnean Society. 157: 70. doi:10.1111/j.1096-3642.2009.00519.x.
April 09, 2024
kujdanowiaspis, extinct, genus, arthrodire, placoderm, fish, from, early, devonian, podolia, ukraine, poland, spain, known, from, many, fragmentary, head, shields, body, armours, temporal, range, early, devonian, preꞒ, nartist, reconstruction, buczacziensissci. Kujdanowiaspis is an extinct genus of arthrodire placoderm fish from the Early Devonian of Podolia Ukraine Poland and Spain 1 2 3 Kujdanowiaspis is known from many fragmentary head shields and body armours 4 KujdanowiaspisTemporal range Early Devonian 419 393 Ma PreꞒ Ꞓ O S D C P T J K Pg NArtist s reconstruction of K buczacziensisScientific classificationDomain EukaryotaKingdom AnimaliaPhylum ChordataClass PlacodermiOrder ArthrodiraGenus KudjanowiaspisStensio 1942Species Kudjanowiaspis buczacziensis Brotzen 1934 type Kudjanowiaspis podolica Brotzen 1934 Kudjanowiaspis rectiformis Brotzen 1934 Classification edit nbsp Preserved spinal plate and thoracic shieldKujdanowiaspis consists of three species all described in 1934 Kujdanowiaspis buczacziensis type species Kujdanowiapsis podolica and Kudjanowiaspis rectiformis although the independent status of K rectiformis is in doubt and is instead most likely K podolica 4 5 6 Kujdanowiaspis zychi was also named and described by Stensio in 1945 but was reassigned to the new genus Erikaspis in 2007 4 5 Kujdanowiaspis is one of the more basal members of the order Arthrodira as shown in the cladogram below 7 Lunaspis broiliiEurycaraspis incilisArthrodira Yujiangolepis liujingensisAntarctaspis mcmurdoensisWuttagoonaspidae Yiminaspis shenmeWuttagoonaspis fletcheriAethaspis majorAethaspis utahensisLehmanosteus hyperboreusAleosteus eganensisSimblaspis cachensisKujdanowiaspis buczacziensisKujdanowiaspis podolicaErikaspis zychiSigaspis lepidophoraEskimaspis heintziBaringaspis dineleyiProaethaspis ohioensisAnarthraspis chamberliniHeightingtonaspis anglicaPhyllolepida Gavinaspis convergensPhyllolepis orviniAustrophyllolepis sp Cowralepis mclachlaniPlacolepis budawangensisActinolepidae Bollandaspis woschmidtiActinolepis spinosaActinolepis magnaActinolepis tuberculataBryantolepis brachycephalusPhlyctaenioidei PhlyctaeniidaeGroenlandaspidaeArctaspidae Dicksonosteus arcticusArctolepidaeBrachythoraci Actinolepidoidei PhlyctaeniinaDescription editBecause of the poor preservation of Kujdanowiaspis fossils little is known about its physiology What is known about it is typical of actinolepid placoderms and it can compared to the better known primitive arthrodires such as Dicksonosteus or Actinolepis It had a very pronounced serrated spinal plate giving it an almost lunate dorsal silhouette 4 The body of Kujdanowiaspis is slightly wider than high with large spinal plates protruding laterally suggesting a benthic lifestyle The body armour of the genus Erikaspis is much flatter 5 Its jaws were comparatively underdeveloped in comparison to the more robust jawed arthrodires that would come after it such as Dunkleosteus and Coccosteus indicating that it likely subsisted primarily on smaller softer bodied animals such as mollusks or worms instead of larger tougher prey animals References edit Dupret Vincent Carls Peter Martinez Perez Carlos Botella Hector 2011 10 01 First Perigondwanan record of actinolepids Vertebrata Placodermi Arthrodira from the Lochkovian Early Devonian of Spain and its palaeobiogeographic significance Palaeogeography Palaeoclimatology Palaeoecology 310 3 273 282 doi 10 1016 j palaeo 2011 07 019 ISSN 0031 0182 Dupret Vincent Blieck Alain 2009 01 01 The Lochkovian Pragian boundary in Podolia Lower Devonian Ukraine based upon placoderm vertebrates Comptes Rendus Geoscience 341 1 63 70 doi 10 1016 j crte 2008 09 007 ISSN 1631 0713 Szrek Piotr Dupret Vincent 2017 Placoderms from the Early Devonian placoderm sandstone of the Holy Cross Mountains Poland with biostratigraphical and palaeobiogeographical implications Acta Palaeontologica Polonica 62 doi 10 4202 app 00395 2017 hdl 1885 204872 a b c d Dupret Vincent 2010 Revision of the genus Kujdanowiaspis Stensio 1942 Placodermi Arthrodira Actinolepida from the Lower Devonian of Podolia Ukraine Geodiversitas 32 1 5 63 doi 10 5252 g2010n1a1 S2CID 129505974 a b c Dupret Vincent Goujet Daniel Mark Kurik Elga 2007 A New Genus of Placoderm Arthrodira Actinolepida from the Lower Devonian of Podolia Ukraine Journal of Vertebrate Paleontology 27 2 266 284 ISSN 0272 4634 Dupret Vincent Sanchez Sophie Goujet Daniel Ahlberg Per Erik 7 Feb 2017 The internal cranial anatomy of Romundina stellina Orvig 1975 Vertebrata Placodermi Acanthothoraci and the origin of jawed vertebrates Anatomical atlas of a primitive gnathostome PLoS One 12 2 266 284 doi 10 1371 journal pone 0171241 PMC 5295682 PMID 28170434 Dupret V Zhu M I N Wang J N Q 2009 The morphology of Yujiangolepis liujingensis Placodermi Arthrodira from the Pragian of Guangxi south China and its phylogenetic significance Zoological Journal of the Linnean Society 157 70 doi 10 1111 j 1096 3642 2009 00519 x Retrieved from https en wikipedia org w index php title Kujdanowiaspis amp oldid 1180006339, wikipedia, wiki, book, books, library,
