Results 61 to 70 of about 1,128 (190)
Neurocranial anatomy of an enigmatic Early Devonian fish sheds light on early osteichthyan evolution
eLife, 2018 The skull of ‘Ligulalepis’ from the Early Devonian of Australia (AM-F101607) has significantly expanded our knowledge of early osteichthyan anatomy, but its phylogenetic position has remained uncertain.
Alice M Clement +6 more
doaj +1 more source
Getting to the heart of a good fossil [PDF]
, 2016 This article is distributed under the terms of the Creative Commons Attribution License, which permits unrestricted use and redistribution provided that the original author and source are credited.The discovery of perfectly preserved 113-119 million year
Long, John A
core +1 more source
A new Groenlandaspidid Arthrodire (Vertebrata: Placodermi) from the Famennian of Belgium [PDF]
, 2005 A new species of the arthrodire genus Groenlandaspis is described from the upper part of the Evieux Formation (Upper Famennian), based on several specimens collected from quarries at Modave and Villers-le-Temple,Liège Province, Belgium.
Clément, G, Janvier, P
core +1 more source
Investigating the Morphogenesis and Replacement of Lamprey Toothlets Using Synchrotron Imaging
Journal of Morphology, Volume 286, Issue 10, October 2025.Toothlet replacement is a conserved feature in lampreys. We describe the mechanism at tissue level and quantify the determining factors, thus providing the basis for studies into a deep homology of cyclostome toothlets and gnathostome teeth. ABSTRACT Teeth are a key innovation that underpinned the adaptive radiation of jawed vertebrates; however, their
Madleen Grohganz +9 more
wiley +1 more source
Remarkable preservation of brain tissues in an Early Cretaceous iguanodontian dinosaur [PDF]
, 2016 It has become accepted in recent years that the fossil record can preserve labile tissues. Here we report highly detailed mineralisation of soft tissues associated with a naturally occurring brain endocast of an iguanodontian dinosaur, found in ~133 Ma ...
Antcliffe, Jonathan B. +11 more
core +12 more sources
A Middle-Late Devonian fish fauna from the Sierra de Perijá, western Venezuela, South America [PDF]
Fossil 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
Oligodendrogenesis in Evolution, Development and Adulthood
Glia, Volume 73, Issue 9, Page 1770-1783, September 2025.Main Points Oligodendrocytes and myelin took shape in jawed vertebrates During development, OPCs are originated from NSCs and then undergo differentiation into mature oligodendrocytes that supply myelin. OPCs persist in the adult CNS and continue to produce oligodendrocytes and myelin.
Hao Hu +3 more
wiley +1 more source
A New Occurrence of the Devonian Arthrodire Holonema [PDF]
, 1971 Author Institution: Department of Geology, Wayne State University, Detroit, Michigan 48202A single, incomplete, paranuchal plate of the cranial shield of Holonema found in the Middle Devonian (Lower Givetian) Silica Formation (Traverse Group) of ...
Mitchell, Steven W.
core
Journal of Anatomy, Volume 247, Issue 3-4, Page 418-441, September/October 2025.The tooth patterning logic, which cannot be inferred from surface morphology, is revealed by visualizing buried tooth remnants in 3D. The primary teeth are added labially, initially organized in radial rows, which transition into linear rows where the coronoid becomes slender.
Donglei Chen
wiley +1 more source
Three-dimensional paleohistology of the scale and median fin spine of Lophosteus superbus (Pander 1856) [PDF]
PeerJ, 2016 Lophosteus superbus is one of only a handful of probable stem-group osteichthyans known from the fossil record. First collected and described in the late 19th century from the upper Silurian Saaremaa Cliff locality in Estonia, it is known from a wealth ...
Anna Jerve +4 more
doaj +2 more sources