Results 31 to 40 of about 1,128 (190)
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]
Acta 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
Paleo-evo-devo implications of a revised conceptualization of enameloids and enamels. [PDF]
Biol Rev Camb Philos SocABSTRACT Understanding the origin and evolution of the mineralized skeleton is crucial for unravelling vertebrate history. However, several limitations hamper our progress. The first obstacle is the lack of uniformity and clarity in the literature for the definition of the tissues of concern, especially of enameloid(s) and enamel(s), resulting in ...
Houée G +3 more
europepmc +2 more sources
First articulated phyllolepid placoderm from North America, with comments on phyllolepid systematics [PDF]
, 2013 Copyright 2013 The Academy of Natural Sciences of Philadelphia. Published version of the paper reproduced here with permission from the publisher.The first articulated phyllolepid placoderm from North America (outside of Greenland) is described from the ...
Daeschler, EB, Long, John A
core +1 more source
Exceptional soft tissues preservation in a mummified frog-eating Eocene salamander [PDF]
, 2017 Fossils are almost always represented by hard tissues but we present here the exceptional case of a three-dimensionally preserved specimen that was ‘mummified’ (likely between 40 and 34 million years ago) in a terrestrial karstic environment.
Laurin, Michel +2 more
core +6 more sources
Electroporation‐based delivery of proteins in Penium margaritaceum and other zygnematophycean algae
Physiologia Plantarum, Volume 175, Issue 6, November/December 2023., 2023 Abstract Zygnematophycean algae represent the streptophyte group identified as the closest sister clade to land plants. Their phylogenetic position and growing genomic resources make these freshwater algae attractive models for evolutionary studies in the context of plant terrestrialization.
Vanessa Polet Carrillo‐Carrasco +2 more
wiley +1 more source
Romundina and the evolutionary origin of teeth [PDF]
, 2015 Theories on the origin of vertebrate teeth have long focused on chondrichthyans as reflecting a primitive condition—but this is better informed by the extinct placoderms, which constitute a sister clade or grade to the living gnathostomes.
Donoghue, Philip C J, Rucklin, Martin
core +2 more sources
Sedimentology, Volume 70, Issue 5, Page 1413-1471, August 2023., 2023 ABSTRACT The study examines bioclastic carbonate contourites that arise from the broad spectrum of bottom‐current related sedimentary processes ranging from deposition to erosion. The result of the intermittent accumulation of sediment are thin and condensed successions with abundant hiatuses.
Heiko Hüneke +9 more
wiley +1 more source
The Hunsrück Slate Konservat‐Lagerstätte
Geology Today, Volume 39, Issue 2, Page 72-76, March/April 2023., 2023 The Lower Devonian Hunsrück Slate in western Germany is world‐famous for its exceptionally preserved and beautiful fossils. What makes this Konservat‐Lagerstätte so fascinating is its unique style of pyritization that has perfectly captured an entire ecosystem, from delicate echinoderms with preserved soft tissues to the Lovecraftian Mimetaster.
Jack T. R. Wilkin
wiley +1 more source
Cautionary tales on the use of proxies to estimate body size and form of extinct animals. [PDF]
Ecol EvolReconstructing the body size and form of extinct animals is of vital importance to our understanding of macroevolution and palaeontology. This is often done using anatomical proxies where extinct species are known only from fragmentary remains. However, there are many limitations influencing the selection of proxy taxa that are frequently overlooked ...
Gayford JH +7 more
europepmc +2 more sources
A large Late Devonian arthrodire (Vertebrata, Placodermi) from Poland [PDF]
Estonian Journal of Earth Sciences, 2018 The arthrodire placoderm, Dunkleosteus sp., is reported from the Upper Devonian (Frasnian) of the Holy Cross Mountains, Poland. The material comprises partially preserved remains of two individuals found in the Kellwasser-like horizon of the Płucki ...
Piotr Szrek, Olga Wilk
doaj +1 more source