The evolution of muscle spindles. [PDF]
Exp PhysiolAbstract Muscle spindles are stretch‐sensitive mechanoreceptors found in the skeletal muscles of most four‐limbed vertebrates. They are unique amongst sensory receptors in the ability to regulate their sensitivity by contraction of the intrafusal muscle fibres on which the sensory endings lie.
Banks RW, Proske U.
europepmc +2 more sources
Investigation of a bone lesion in a gorgonopsian (Synapsida) from the Permian of Zambia and periosteal reactions in fossil non-mammalian tetrapods [PDF]
Philosophical Transactions of the Royal Society B: Biological Sciences, 2020 Christian A Sidor, Adam K Huttenlocker
exaly +2 more sources
Frontiers in Ecology and Evolution, 2021 Varanids are the only non-avian sauropsids that are known to approach the warm-blooded mammals in stamina. Furthermore, a much higher maximum metabolic rate (MMR) gives endotherms (including birds) higher stamina than crocodiles, turtles, and non-varanid
Philipp L. Knaus +8 more
doaj +1 more source
A new varanopid synapsid from the early Permian of Oklahoma and the evolutionary stasis in this clade [PDF]
Royal Society Open Science, 2019 Varanopids are a basal clade of small- to medium-sized non-therapsid synapsids, whose range extends from the late Pennsylvanian to the late middle Permian, and are found in North America, Russia, Europe and South Africa.
Sigi Maho +2 more
doaj +1 more source
Computed Tomography elucidates ontogeny within the basal therapsid clade Biarmosuchia [PDF]
PeerJ, 2021 Biarmosuchia is a clade of basal therapsids that includes forms possessing plesiomorphic ‘pelycosaurian’ cranial characters as well as the highly derived Burnetiamorpha which are characterised by cranial pachyostosis and a variety of cranial bosses ...
Aliénor Duhamel +4 more
doaj +2 more sources
Effects of taphonomic deformation on geometric morphometric analysis of fossils: a study using the dicynodont Diictodon feliceps (Therapsida, Anomodontia) [PDF]
PeerJ, 2020 Taphonomic deformation, the distortion of fossils as a result of geological processes, poses problems for the use of geometric morphometrics in addressing paleobiological questions.
Christian F. Kammerer +3 more
doaj +2 more sources
Systematics of the Rubidgeinae (Therapsida: Gorgonopsia) [PDF]
PeerJ, 2016 The subfamily Rubidgeinae, containing the largest known African gorgonopsians, is thoroughly revised. Rubidgeinae is diagnosed by the absence of a blade-like parasphenoid rostrum and reduction or absence of the preparietal.
Christian F. Kammerer
doaj +2 more sources
Journal of Morphology, Volume 284, Issue 9, September 2023., 2023 Neutron tomography of a skull of the burrower Kawingasaurus fossilis (Synapsida, Dicynodontia) revealed a system of turbinal ridges for attachment of respiratory and olfactory turbinates including remains of turbinates in the nasal cavity that strongly resemble the mammalian bauplan.
Michael Laaß, Anders Kaestner
wiley +1 more source
A new therocephalian (Gorynychus masyutinae gen. et sp. nov.) from the Permian Kotelnich locality, Kirov Region, Russia [PDF]
PeerJ, 2018 A new therocephalian taxon (Gorynychus masyutinae gen. et sp. nov.) is described based on a nearly complete skull and partial postcranium from the Permian Kotelnich locality of Russia. Gorynychus displays an unusual mixture of primitive (“pristerosaurian”
Christian F. Kammerer, Vladimir Masyutin
doaj +2 more sources
Elevated Cranial Sutural Complexity in Burrowing Dicynodonts
Frontiers in Ecology and Evolution, 2021 Relationships between the complexity of the cranial sutures and the inferred ecology of dicynodont synapsids are explored. Simple complexity indices based on degree of sutural interdigitation were calculated for 70 anomodont species and indicate that the
Christian F. Kammerer
doaj +1 more source