Julia A. Schultz
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View article: Novel perspectives on Late Cretaceous elasmobranch diversity in the Southern Hemisphere high latitudes
Novel perspectives on Late Cretaceous elasmobranch diversity in the Southern Hemisphere high latitudes Open
Two new vertebrate assemblages rich in elasmobranch isolated teeth and dermal denticles from the lower Cenomanian (Upper Cretaceous) of Patagonia in southern Argentina comprise ten identified taxa († Protosqualus sp., † Heterodontus sp., †…
View article: Reexamining the evolutionary history of the mammalian medial pterygoid muscle
Reexamining the evolutionary history of the mammalian medial pterygoid muscle Open
In non-mammalian synapsids, feeding and hearing are closely linked because some jaw bones are involved in both functions. The evolutionary decoupling of these two systems in early mammals likely catalyzed greater specialization of feeding …
View article: A perspective from the Mesozoic: Evolutionary changes of the mammalian skull and their influence on feeding efficiency and high‐frequency hearing
A perspective from the Mesozoic: Evolutionary changes of the mammalian skull and their influence on feeding efficiency and high‐frequency hearing Open
The complex evolutionary history behind modern mammalian chewing performance and hearing function is a result of several changes in the entire skeletomuscular system of the skull and lower jaw. Lately, exciting multifunctional 3D analytica…
View article: The origins of mammal growth patterns during the Jurassic mammalian radiation
The origins of mammal growth patterns during the Jurassic mammalian radiation Open
We use synchrotron x-ray tomography of annual growth increments in the dental cementum of mammaliaforms (stem and crown fossil mammals) from three faunas across the Jurassic to map the origin of patterns of mammalian growth patterns, which…
View article: A new biomechanical model of the mammal jaw based on load path analysis
A new biomechanical model of the mammal jaw based on load path analysis Open
The primary function of the tetrapod jaw is to transmit jaw muscle forces to bite points. The routes of force transfer in the jaw have never been studied but can be quantified using load paths – the shortest, stiffest routes from regions o…
View article: Does age matter?—Efficiency of mechanical food break down in Tupaia belangeri at different ages
Does age matter?—Efficiency of mechanical food break down in Tupaia belangeri at different ages Open
The relationship of food comminution and individual age in Tupaia belangeri is investigated. It is hypothesized that with increasing age the performance of the molar dentition decreases due to progressive tooth wear. While this relationshi…
View article: Deciduous dentition, tooth replacement, and mandibular growth in the Late Jurassic docodontan Haldanodon exspectatus (Mammaliaformes)
Deciduous dentition, tooth replacement, and mandibular growth in the Late Jurassic docodontan Haldanodon exspectatus (Mammaliaformes) Open
The Late Jurassic docodontan Haldanodon exspectatus from the Guimarota coal mine in Portugal provides important information on the evolution of the dental replacement pattern in mammaliaforms. Haldanodon shows diphyodont replacement of ant…
View article: The first southern hemisphere occurrence of the extinct Cretaceous sclerorhynchoid sawfish <i>Ptychotrygon</i> (Chondrichthyes, Batoidea), with a review of <i>Ptychotrygon</i> taxonomy
The first southern hemisphere occurrence of the extinct Cretaceous sclerorhynchoid sawfish <i>Ptychotrygon</i> (Chondrichthyes, Batoidea), with a review of <i>Ptychotrygon</i> taxonomy Open
A new extinct sclerorhynchoid sawfish, Ptychotrygon ameghinorum sp. nov., is presented here based on abundant isolated teeth and some dermal denticles, which were recovered from the Mata Amarilla Formation, belonging to the lower Upper Cre…
View article: Mammalian petrosal from the Lower Cretaceous high paleo-latitude Teete locality (Yakutia, Eastern Russia)
Mammalian petrosal from the Lower Cretaceous high paleo-latitude Teete locality (Yakutia, Eastern Russia) Open
A mammalian petrosal from the Lower Cretaceous Teete locality in Yakutia (Russia) shows a prominent and complex system of venous channels in the bony wall of the pars cochlearis surrounding the straight cochlear canal. This complex venous …
View article: First spalacotheriid and dryolestid mammals from the Cretaceous of Germany
First spalacotheriid and dryolestid mammals from the Cretaceous of Germany Open
The new spalacotheriid “symmetrodontan” Cifellitherium suderlandicum gen. et sp. nov. from the Barremian–Aptian
\nof the Balve locality in northwestern Germany is the first record of spalacotheriids in Central Europe. The new taxon is
\n…
View article: Jurassic mammaliaform petrosals from Western Siberia (Russia) and implications for early mammalian inner-ear anatomy
Jurassic mammaliaform petrosals from Western Siberia (Russia) and implications for early mammalian inner-ear anatomy Open
Five partially preserved mammaliaform petrosals recovered from Middle Jurassic sediments of the Berezovsk coal mine (Krasnoyarsk Krai, Russia) show similarities to other early mammaliaforms like the morganucodontan Morganucodon and the doc…
View article: The evolution of anteriorly directed molar occlusion in mammals
The evolution of anteriorly directed molar occlusion in mammals Open
In non-mammalian synapsids and early mammals, evolutionary transformations in the feeding and hearing apparatuses are posited to have been prerequisites for the radiation of extant mammals. Unlike most vertebrates, including many early syn…
View article: Dental morphology of<i>Adalatherium hui</i>(Mammalia, Gondwanatheria) from the LATE Cretaceous of Madagascar
Dental morphology of<i>Adalatherium hui</i>(Mammalia, Gondwanatheria) from the LATE Cretaceous of Madagascar Open
The dentition in the only known specimen of Adalatherium hui, a gondwanatherian mammal from the Late Cretaceous of Madagascar, is markedly different from that of any previously known mammaliaform, extinct or extant. The two preserved upper…
View article: Multituberculate mammals from the Middle Jurassic of Western Siberia, Russia, and the origin of Multituberculata
Multituberculate mammals from the Middle Jurassic of Western Siberia, Russia, and the origin of Multituberculata Open
Tashtykia primaeva gen. et sp. nov. and Tagaria antiqua gen. et sp. nov. (Multituberculata incertae sedis ) are described based on isolated teeth from the Middle Jurassic (Bathonian) Itat Formation from the Berezovsk coal mine in Krasnoyar…
View article: A new small-sized stem salamander from the Middle Jurassic of Western Siberia, Russia
A new small-sized stem salamander from the Middle Jurassic of Western Siberia, Russia Open
Salamanders (Caudata) are one of the three modern groups of amphibians known from the Middle Jurassic. The early stages of evolution of these amphibians are still poorly known, especially for stem taxa of Jurassic age. A new small-sized st…
View article: Dental morphology of <i>Adalatherium hui</i> (Mammalia, Gondwanatheria) from the LATE Cretaceous of Madagascar
Dental morphology of <i>Adalatherium hui</i> (Mammalia, Gondwanatheria) from the LATE Cretaceous of Madagascar Open
The dentition in the only known specimen of Adalatherium hui, a gondwanatherian mammal from the Late Cretaceous of Madagascar, is markedly different from that of any previously known mammaliaform, extinct or extant. The two preserved upper…
View article: Complementary approaches to tooth wear analysis in Tritylodontidae (Synapsida, Mammaliamorpha) reveal a generalist diet
Complementary approaches to tooth wear analysis in Tritylodontidae (Synapsida, Mammaliamorpha) reveal a generalist diet Open
Stereoscopic microwear and 3D surface texture analyses on the cheek teeth of ten Upper Triassic to Lower Cretaceous tritylodontid (Mammaliamorpha) taxa of small/medium to large body size suggest that all were generalist feeders and none wa…
View article: Morphology of the petrosal and stapes of <i>Borealestes</i> (Mammaliaformes, Docodonta) from the Middle Jurassic of Skye, Scotland
Morphology of the petrosal and stapes of <i>Borealestes</i> (Mammaliaformes, Docodonta) from the Middle Jurassic of Skye, Scotland Open
We describe, in unprecedented detail, the petrosals and stapes of the docodont Borealestes from the Middle Jurassic of Scotland, using high resolution μ CT and phase‐contrast synchrotron imaging. We describe the inner ear endocast and the …
View article: The vertebrate middle and inner ear: A short overview
The vertebrate middle and inner ear: A short overview Open
The evolution of the various hearing adaptations is connected to major structural changes in nearly all groups of vertebrates. Besides hearing, the detection of acceleration and orientation in space are key functions of this mechanosensory…
View article: Oldest known multituberculate stapes suggests an asymmetric bicrural pattern as ancestral for Multituberculata
Oldest known multituberculate stapes suggests an asymmetric bicrural pattern as ancestral for Multituberculata Open
Middle ear ossicles (malleus, incus, stapes) are known for few multituberculate taxa, and three different stapedial morphotypes have been suggested: (i) slender, columelliform and microperforate, (ii) robust and rod-like, and (iii) bicrura…
View article: 13th Symposium on Mesozoic Terrestrial Ecosystems and Biota (MTE13)
13th Symposium on Mesozoic Terrestrial Ecosystems and Biota (MTE13) Open
MTE13 is a showcase for the most up-to-date and groundbreaking research on Mesozoic terrestrial ecosystems and organisms. Presentations cover a wide variety of Mesozoic life, from protists to mammals, and Mesozoic environments, from organi…
View article: Supplementary material from "Oldest known multituberculate stapes suggests an asymmetric bicrural pattern as ancestral for Multituberculata"
Supplementary material from "Oldest known multituberculate stapes suggests an asymmetric bicrural pattern as ancestral for Multituberculata" Open
Middle ear ossicles (malleus, incus, stapes) are known for few multituberculate taxa, and three different stapedial morphotypes have been suggested: (i) slender, columelliform and microperforate, (ii) robust and rod-like and (iii) bicrural…