Results 21 to 30 of about 278 (105)

A Devonian Fish Tale: A New Method of Body Length Estimation Suggests Much Smaller Sizes for Dunkleosteus terrelli (Placodermi: Arthrodira)

open access: yesDiversity, 2023
Dunkleosteus terrelli, an arthrodire placoderm, is one of the most widely recognized fossil vertebrates due to its large size and status as one of the earliest vertebrate apex predators.
Russell K. Engelman
doaj   +1 more source

A new Lower Devonian arthrodire (Placodermi) from the NW Siberian Platform [PDF]

open access: yesEstonian Journal of Earth Sciences, 2013
A new genus and species of arthrodires, Eukaia elongata (Actinolepidoidei, Placodermi), is described from the Lower Devonian, ?Pragian of the Turukhansk region, NW Siberian Platform.
Elga Mark-Kurik
doaj   +1 more source

Evolution of glial wrapping: A new hypothesis

open access: yesDevelopmental Neurobiology, Volume 81, Issue 5, Page 453-463, July/August 2021., 2021
Abstract Animals are able to move and react in numerous ways to external stimuli. Thus, environmental stimuli need to be detected, information must be processed and finally an output decision must be transmitted to the musculature to get the animal moving.
Simone Rey   +2 more
wiley   +1 more source

A new assessment of the Late Devonian antiarchan fish Bothriolepis leptocheira from South Timan (Russia) and the biotic crisis near the Frasnian–Famennian boundary [PDF]

open access: yesActa Palaeontologica Polonica, 2017
The species of the Late Devonian, earliest Famennian placoderm fish Bothriolepis jeremejevi has been downranked to subspecies Bothriolepis leptocheira jeremejevi comb. nov.
Ervīns Lukševičs   +2 more
doaj   +1 more source

Placoderms from the Lower Devonian “placoderm sandstone” of the Holy Cross Mountains, Poland with biostratigraphical and palaeobiogeographical implications [PDF]

open access: yesActa Palaeontologica Polonica, 2017
The siliciclastic sequence of the Lower Devonian of the southern part of the Holy Cross Mountains in Poland is renown for abundant vertebrate fossils, including ostracoderm, sarcopterygian, acanthodian, chondrichthyan, and placoderm remains. Study of the
Piotr Szrek, Vincent Dupret
doaj   +1 more source

A Middle-Late Devonian fish fauna from the Sierra de Perijá, western Venezuela, South America [PDF]

open access: yesFossil Record, 2002
A new Devonian fossil fish fauna from the region of Caño Colorado between the Rio Palmar and Rio Socuy, Sierra de Perijá, Venezuela, comes from two localities and several horizons within the Campo Chico Formation, dated on plants and spores as Givetian ...
G. C. Young, J. M. Moody
doaj   +5 more sources

Bioerosion in the Late Devonian placoderm remains from the Holy Cross Mountains, Poland

open access: yesActa Palaeontologica Polonica
We report the first occurrence of trace fossils in placoderm bones from the Upper Devonian of the Holy Cross Mountains. A taxonomic analysis of three ichnogenera revealed the earliest evidence of Sulculites (ie., Sulculites bellus), characterised by ...
Patrycja G. Dworczak   +2 more
doaj   +1 more source

Some notes on a variability of Bothriolepidids (Placodermi, Antiarchi): unusual specimen of Livnolepis Heckeri (Luksevics) from the famennian of Tver region, European Russia

open access: yesИзвестия высших учебных заведений: Геология и разведка, 2019
The fragment of the skull cap of placoderm Livnolepis heckeri (Luksevics) from the Bilovo Formation (Famennian, Upper Devonian) near the Bilovo Village of Tver Region has been described.
S. V. Moloshnikov, V. V. Linkevich
doaj   +1 more source

Type Crania of the Devonian Placoderm Macropetalichthys from North America: Resolving Key Nomenclatural and Stratigraphic Conundrums

open access: yesFishes
Macropetalichthys rapheidolabis Norwood and Owen, 1846 (Placodermi: Petalichthyida), type species of Macropetalichthys Norwood and Owen, 1846, was based on a single cranial roof from the Devonian of southeastern Indiana.
Loren E. Babcock
doaj   +1 more source

A new tubalepid fish (Antiarcha, Placodermi) from the Middle Devonian of Huize, Yunnan, China

open access: yesSwiss Journal of Palaeontology
A new genus and species of tubalepid antiarch, Tongdulepis concavus gen. et sp. nov., is described from the Middle Devonian (Qujing Formation, late Eifelian) in Huize County, Qujing, northeastern Yunnan, China.
Yanchao Luo, Zhaohui Pan, Min Zhu
doaj   +1 more source

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