Articles | Volume 23, issue 1
https://doi.org/10.5194/fr-23-1-2020
© Author(s) 2020. This work is distributed under
the Creative Commons Attribution 4.0 License.
the Creative Commons Attribution 4.0 License.
https://doi.org/10.5194/fr-23-1-2020
© Author(s) 2020. This work is distributed under
the Creative Commons Attribution 4.0 License.
the Creative Commons Attribution 4.0 License.
Research article
| 
12 Feb 2020
Research article |
| 12 Feb 2020
| 12 Feb 2020
A new species of baenid turtle from the Early Cretaceous Lakota Formation of South Dakota
Walter G. Joyce
CORRESPONDING AUTHOR
Department of Geosciences, University of Fribourg, 1700 Fribourg,
Switzerland
Yann Rollot
Department of Geosciences, University of Fribourg, 1700 Fribourg,
Switzerland
Richard L. Cifelli
Oklahoma Museum of Natural History, Norman, OK 73072, USA
Related authors
Walter G. Joyce and Yann Rollot
Foss. Rec., 23, 83–93, https://doi.org/10.5194/fr-23-83-2020, https://doi.org/10.5194/fr-23-83-2020, 2020
Short summary
Short summary
Peltochelys duchastelii is an enigmatic fossil turtle from the Early Cretaceous of Bernissart, Belgium. Here we provide an alternative interpretation of the morphology of this turtle, which suggests for the first time relationships with paracryptodires, a now extinct group of turtles known from coeval deposits throughout western Europe and North America.
Walter G. Joyce, Virginie S. Volpato, and Yann Rollot
Foss. Rec., 21, 301–310, https://doi.org/10.5194/fr-21-301-2018, https://doi.org/10.5194/fr-21-301-2018, 2018
Short summary
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Pig-nosed turtles are an enigmatic group of reptiles with an extensive fossil record across the globe. The group is known to have inhabited North America during the Eocene, about 55 to 40 million years ago, but information is still limited regarding the exact morphology of these turtles, as remains are few. Here we document the morphology of the only known skull of a North American pig-nosed turtle based on a fossil from the middle Eocene Washakie Formation of Sweetwater County, Wyoming, USA.
Walter G. Joyce and Yann Rollot
Foss. Rec., 23, 83–93, https://doi.org/10.5194/fr-23-83-2020, https://doi.org/10.5194/fr-23-83-2020, 2020
Short summary
Short summary
Peltochelys duchastelii is an enigmatic fossil turtle from the Early Cretaceous of Bernissart, Belgium. Here we provide an alternative interpretation of the morphology of this turtle, which suggests for the first time relationships with paracryptodires, a now extinct group of turtles known from coeval deposits throughout western Europe and North America.
Walter G. Joyce, Virginie S. Volpato, and Yann Rollot
Foss. Rec., 21, 301–310, https://doi.org/10.5194/fr-21-301-2018, https://doi.org/10.5194/fr-21-301-2018, 2018
Short summary
Short summary
Pig-nosed turtles are an enigmatic group of reptiles with an extensive fossil record across the globe. The group is known to have inhabited North America during the Eocene, about 55 to 40 million years ago, but information is still limited regarding the exact morphology of these turtles, as remains are few. Here we document the morphology of the only known skull of a North American pig-nosed turtle based on a fossil from the middle Eocene Washakie Formation of Sweetwater County, Wyoming, USA.
Related subject area
Evolution and phylogeny
The life cycle in late Paleozoic eryopid temnospondyls: developmental variation, plasticity and phylogeny
A unique, large-sized stem Odonata (Insecta) found in the early Pennsylvanian of New Brunswick (Canada)
Sheltered preservation in Ordovician trilobites
Determining the gait of Miocene, Pliocene, and Pleistocene horses from fossilized trackways
†Cretolixon – a remarkable new genus of rhopalosomatid wasps (Hymenoptera: Vespoidea: Rhopalosomatidae) from chemically tested, mid-Cretaceous Burmese (Kachin) amber supports the monophyly of Rhopalosomatinae
The youngest occurrence of embolomeres (Tetrapoda: Anthracosauria) from the Sunjiagou Formation (Lopingian, Permian) of North China
Sampling fossil floras for the study of insect herbivory: how many leaves is enough?
Quantitative analysis of suture lines in Carboniferous ammonoids
Osseous anomalies of the cryptobranchid Eoscapherpeton asiaticum (Amphibia: Caudata) from the Late Cretaceous of Uzbekistan
Growth patterns, sexual dimorphism, and maturation modeled in Pachypleurosauria from Middle Triassic of central Europe (Diapsida: Sauropterygia)
New information on the Cenomanian bothremydid turtle Algorachelus based on new, well-preserved material from Spain
A case study of developmental palaeontology in Stereosternum tumidum (Mesosauridae, Parareptilia)
Postcrania of large dissorophid temnospondyls from Richards Spur, Oklahoma
Description of the skeleton of the fossil beaked whale Messapicetus gregarius: searching potential proxies for deep-diving abilities
Foramina in plesiosaur cervical centra indicate a specialized vascular system
The wasp larva's last supper: 100 million years of evolutionary stasis in the larval development of rhopalosomatid wasps (Hymenoptera: Rhopalosomatidae)
The fossil history of pseudoscorpions (Arachnida: Pseudoscorpiones)
The blueprint of the Amphiesmenoptera – Tarachoptera, a new order of insects from Burmese amber (Insecta, Amphiesmenoptera)
Modeling the physiology of the aquatic temnospondyl Archegosaurus decheni from the early Permian of Germany
Turtle shell bone and osteoderm histology of Mesozoic and Cenozoic stem-trionychian Adocidae and Nanhsiungchelyidae (Cryptodira: Adocusia) from Central Asia, Mongolia, and North America
Reinvestigation of Protelytron permianum (Insecta; Early Permian; USA) as an example for applying reflectance transformation imaging to insect imprint fossils
A new species of Cyclotosaurus (Stereospondyli, Capitosauria) from the Late Triassic of Bielefeld, NW Germany, and the intrarelationships of the genus
New remarkable Late Jurassic teleosts from southern Germany: Ascalaboidae n. fam., its content, morphology, and phylogenetic relationships
New specimen of Cacops woehri indicates differences in the ontogenetic trajectories among cacopine dissorophids
The stratigraphic importance of the brontothere (cf. Diplacodon elatus) in the Brennan Basin Member of the Duchesne River Formation of Utah
Do tracks yield reliable information on gaits? – Part 1: The case of horses
Rainer R. Schoch
Foss. Rec., 24, 295–319, https://doi.org/10.5194/fr-24-295-2021, https://doi.org/10.5194/fr-24-295-2021, 2021
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Eryopids were 2 m large relatives of modern amphibians that formed top predators in the Paleozoic. They are found in aquatic deposits and apparently preyed on fishes. Their life cycle is preserved in a single species, Onchiodon labyrinthicus, from eastern Germany. It existed in a stressed ecosystem, and the broad variation in the studied sample correlates with seasonal fluctuations. Eryopids evolved into increasingly large, heavily built inhabitants of streams and seasonal water bodies.
Olivier Béthoux, Rowan E. Norrad, Matthew R. Stimson, Olivia A. King, Luke F. Allen, Isabelle Deregnaucourt, Steven J. Hinds, Jake H. Lewis, and Jörg W. Schneider
Foss. Rec., 24, 207–221, https://doi.org/10.5194/fr-24-207-2021, https://doi.org/10.5194/fr-24-207-2021, 2021
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A specimen of an extinct relative of damsel- and dragonflies was discovered from ca. 310-million-years-old strata from New Brunswick (Canada). It is composed of an incomplete hindwing belonging to a new species whose wingspan was about 35 cm. Despite its incompleteness, it composes a useful addition to our knowledge of the early evolution of the group, owing to its unique combination of traits.
Oldřich Fatka, Petr Budil, and Petr Kraft
Foss. Rec., 24, 193–205, https://doi.org/10.5194/fr-24-193-2021, https://doi.org/10.5194/fr-24-193-2021, 2021
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Sixteen samples contain one to six Ordovician trilobites preserved in the protected space inside of empty cephalopod conchs or under diverse parts of exoskeletons of much larger disarticulated trilobites. Analyses of the level of articulation of trilobites in combination with their orientation, disposition, and placement make it possible to conclude that the hidden trilobites deliberately entered shells of dead cephalopods for food, refuge, ecdysis, reproduction or lodging.
Alan Vincelette
Foss. Rec., 24, 151–169, https://doi.org/10.5194/fr-24-151-2021, https://doi.org/10.5194/fr-24-151-2021, 2021
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This study compares footprints made by modern horses with two fossil trackways. One shows a Pleistocene horse in a gallop of 9 m/s, perhaps fleeing predators or migrating. More intriguing is the trackway of a Miocene horse with diagonal couplets in a gait of 2 m/s. This best matches the artificial gait of the rack/tölt only found in breeds such as the Saddlebred, Icelandic, and Paso, providing more evidence that early horses possessed a greater variety of useful gaits than most modern horses.
Volker Lohrmann, Qi Zhang, Peter Michalik, Jeremy Blaschke, Patrick Müller, Laurent Jeanneau, and Vincent Perrichot
Foss. Rec., 23, 215–236, https://doi.org/10.5194/fr-23-215-2020, https://doi.org/10.5194/fr-23-215-2020, 2020
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A new mid-Cretaceous rhopalosomatid wasp, Cretolixon alatum Lohrmann gen. et sp. nov., is described from Burmese (Kachin) amber. The new genus has a unique mixture of characters, some of which are only known from the recent brachypterous genus Olixon and others of which are known only from the recent macropterous genera. Thus, Cretolixon not only provides further evidence for the monophyly of the family but also contributes evidence for the monophyly of the Rhopalosomatinae.
Jianye Chen and Jun Liu
Foss. Rec., 23, 205–213, https://doi.org/10.5194/fr-23-205-2020, https://doi.org/10.5194/fr-23-205-2020, 2020
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In this paper, we describe a new species of embolomere from 255-million-year-old fossil beds from northern China. This group of ancient animals is closely related to amniotes (reptiles, birds, and mammals) and was previously thought to have gone extinct around 273 million years ago. The new discovery indicates that North China, with its ancient tropical rain forest, became a last reservoir for these animals right before the end-Permian mass extinction.
Sandra R. Schachat, S. Augusta Maccracken, and Conrad C. Labandeira
Foss. Rec., 23, 15–32, https://doi.org/10.5194/fr-23-15-2020, https://doi.org/10.5194/fr-23-15-2020, 2020
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Insects have been feeding on plants for over 300 million years. The fossil record preserves evidence of this behavior: it is possible to examine a fossilized leaf and see the spots where insects ate it or laid their eggs in it. The study of these insect
traceson leaves shows us how insects have adapted to changing climates. Here, we address the question of how many leaves from a single fossil locality must be examined to permit statistically robust comparisons in deep time.
Michael Wegerer, Kenneth De Baets, and Dieter Korn
Foss. Rec., 21, 223–236, https://doi.org/10.5194/fr-21-223-2018, https://doi.org/10.5194/fr-21-223-2018, 2018
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Two morphometric methods are applied for the analysis of suture lines in Early Carboniferous ammonoids: (1) classic metric data using multivariate statistic methods and (2) outline data are analysed using the elliptic Fourier analysis. Both methods lead to similar results and demonstrate ontogenetic and phylogenetic trends in these ammonoids: (1) a general decrease in the amplitude of lobes and saddles, (2) a proportional widening of the external lobe, and (3) a heightening of the median saddle.
Pavel Skutschas, Veniamin Kolchanov, Elizaveta Boitsova, and Ivan Kuzmin
Foss. Rec., 21, 159–169, https://doi.org/10.5194/fr-21-159-2018, https://doi.org/10.5194/fr-21-159-2018, 2018
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Paleopathologies among fossil members of modern groups of amphibians are poorly documented. We describe pathologies of the fossil salamander Eoscapherpeton asiaticum from the Late Cretaceous of Uzbekistan. These pathologies can result from trauma, infection from trauma and congenital disorders. The occurrence of several traumatic femoral pathologies in Eoscapherpeton could result from intraspecific aggressive behavior. Bone pathologies are described for the first time in fossil salamanders.
Nicole Klein and Eva Maria Griebeler
Foss. Rec., 21, 137–157, https://doi.org/10.5194/fr-21-137-2018, https://doi.org/10.5194/fr-21-137-2018, 2018
Adán Pérez-García
Foss. Rec., 21, 119–135, https://doi.org/10.5194/fr-21-119-2018, https://doi.org/10.5194/fr-21-119-2018, 2018
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The Spanish Algorachelus peregrinus is the oldest pleurodiran turtle known in the Northern Hemisphere. New material is presented, including several shells. The patterns by which some of them were disarticulated are analyzed. Several pathologies are identified. The knowledge about the anatomy and intraspecific variability is improved. Algorachelus is recognized in the Middle East and North America. The oldest known dispersal event of Pleurodira from Gondwana to Laurasia is characterized.
Constanze Bickelmann and Linda A. Tsuji
Foss. Rec., 21, 109–118, https://doi.org/10.5194/fr-21-109-2018, https://doi.org/10.5194/fr-21-109-2018, 2018
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Mesosaurs were reptiles that lived around 280 mya. They were the first land reptile group to return to the water. Study of a fossil from the Museum für Naturkunde, Berlin reveals a previously unobserved baby skeleton near the adult. This small skeleton can tell us about how these creatures grew; the lower segment of the hind limb is already proportionally larger than the upper hind limb and the lower and upper forelimbs. This may be because young mesosaurs needed to swim right from birth.
Bryan M. Gee and Robert R. Reisz
Foss. Rec., 21, 79–91, https://doi.org/10.5194/fr-21-79-2018, https://doi.org/10.5194/fr-21-79-2018, 2018
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This paper presents a description of an extremely well-preserved and articulated skeleton of a temnospondyl amphibian from the early Permian of Oklahoma. Postcranial material is not often well-preserved or well-described in the literature for this group, known as dissorophids, and acquiring new data on this region of the skeleton is important for understanding the evolution of the group. It also represents the first documentation at this site of a genus that was otherwise known only from Texas.
Benjamin Ramassamy, Olivier Lambert, Alberto Collareta, Mario Urbina, and Giovanni Bianucci
Foss. Rec., 21, 11–32, https://doi.org/10.5194/fr-21-11-2018, https://doi.org/10.5194/fr-21-11-2018, 2018
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Extant beaked whales perform deep dives to forage for squids. We studied the morphology of the fossil ziphiid Messapicetus gregarius to evaluate its ability to perform such dives. Our analysis suggests an enlargement of the pterygoid sinus system in deep divers. In M. gregarius, the pterygoid sinus is enlarged, but other lines of evidence indicate that the coastal environment also represented an important part of its home range.
Tanja Wintrich, Martin Scaal, and P. Martin Sander
Foss. Rec., 20, 279–290, https://doi.org/10.5194/fr-20-279-2017, https://doi.org/10.5194/fr-20-279-2017, 2017
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Plesiosaurians retain a very long neck but greatly reduce neck flexibility, and the cervicals have large, paired, and highly symmetrical foramina on the ventral side of the centrum, traditionally termed
subcentral foramina, and on the floor of the neural canal. We found that these dorsal and the ventral foramina are connected by a canal. The foramen are not for nutrient transfer; they are the osteological correlates of a highly paedomorphic vascular system in the neck of plesiosaurs.
Volker Lohrmann and Michael S. Engel
Foss. Rec., 20, 239–244, https://doi.org/10.5194/fr-20-239-2017, https://doi.org/10.5194/fr-20-239-2017, 2017
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Amber functions as a window into the past, capable of capturing behaviors
frozenfor millions of years. Here, we report on the exceptionally rare discovery of a dinosaur-age larva of a stinging wasp, feeding on its cricket host, in mid-Cretaceous amber from Myanmar. It reveals a considerable constancy in the biology of this particular family over the last 100 million years. The excellent preservation of the larva is remarkable and due solely to the fidelity permitted by inclusion in amber.
Danilo Harms and Jason A. Dunlop
Foss. Rec., 20, 215–238, https://doi.org/10.5194/fr-20-215-2017, https://doi.org/10.5194/fr-20-215-2017, 2017
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We review the fossil history of pseudoscorpions (Arachnida: Pseudoscorpiones), one of the oldest terrestrial lineages with
a fossil record that goes back to the Devonian. Pseudoscorpions do not fossilise easily, and records from the Mesozoic and
Cenozoic consist almost exclusively of amber inclusions. Overall, 16 of the 26 recent families have been documented from
fossils. This is a group of evolutionary stasis and we discuss aspects of palaeobiology, preservation, and ecology.
Wolfram Mey, Wilfried Wichard, Patrick Müller, and Bo Wang
Foss. Rec., 20, 129–145, https://doi.org/10.5194/fr-20-129-2017, https://doi.org/10.5194/fr-20-129-2017, 2017
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Based on a total of 14 inclusions from Burmese amber the new, extinct insect order Tarachoptera was established. The new order Tarachoptera is placed in the superorder Amphiesmenoptera. The species of Tarachoptera are tiny insects with a wing span of 2.3–4.5 mm, but are highly specialized according to their aberrant morphology. They lived in the forests of Southeast Asia about 100 million years ago.
Florian Witzmann and Elizabeth Brainerd
Foss. Rec., 20, 105–127, https://doi.org/10.5194/fr-20-105-2017, https://doi.org/10.5194/fr-20-105-2017, 2017
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Based on the estimation of its body mass and metabolic rate, we calculated heat balance, gas exchange, osmoregulation, and digestion of the 290-million-year-old aquatic amphibian Archegosaurus. Our results suggest that its physiology was more fish- than tetrapod-like in many respects. We conducted this study, which is mainly based on theoretical calculations and comparison with extant analogs, to shed light on the physiology and lifestyle of early tetrapods.
Torsten M. Scheyer, Elena V. Syromyatnikova, and Igor G. Danilov
Foss. Rec., 20, 69–85, https://doi.org/10.5194/fr-20-69-2017, https://doi.org/10.5194/fr-20-69-2017, 2017
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We review shell bone microstructures of Adocidae and Nanhsiungchelyidae, two groups of extinct hide-necked turtles related to modern soft-shelled turtles (Trionychidae) and the pig-nosed turtle Carettochelys insculpta (Carettochelyidae). Adocids and nanhsiungchelyids both have a good fossil record in North America and Asia during the Cretaceous and Cenozoic. Our microstructural data supplement previously reported differences in external shell morphology between adocids and nanhsiungchelyids.
Olivier Béthoux, Artémis Llamosi, and Séverine Toussaint
Foss. Rec., 20, 1–7, https://doi.org/10.5194/fr-20-1-2016, https://doi.org/10.5194/fr-20-1-2016, 2016
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Fossil insects preserved as an imprint on laminae have subtle differences in relief which can be difficult to photograph. Recourse to reflectance transformation imaging allowed us to deliver exhaustive and interactive photographic data for Protelytron permianum. Based on these data we were able ascertain that it is an early relative of earwigs. In order to better appreciate its elaborate hind wing folding mechanism, we provide guidelines to build and operate a paper model.
Florian Witzmann, Sven Sachs, and Christian J. Nyhuis
Foss. Rec., 19, 83–100, https://doi.org/10.5194/fr-19-83-2016, https://doi.org/10.5194/fr-19-83-2016, 2016
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In this study, the well-preserved skull of a giant amphibian from the Late Triassic Stuttgart Formation (Schilfsandstein) of Bielefeld-Sieker in NW Germany is described and a new species, Cyclotosaurus buechneri sp. nov., is erected. Cyclotosaurus buechneri represents the only unequivocal evidence of Cyclotosaurus in northern Germany. The amphibian skull was found more than 40 years ago and is well known in Bielefeld and the surrounding areas but has so far never been described.
G. Arratia
Foss. Rec., 19, 31–59, https://doi.org/10.5194/fr-19-31-2016, https://doi.org/10.5194/fr-19-31-2016, 2016
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Complete morphological descriptions of exceptionally beautifully preserved Late Jurassic fishes from Bavaria (e.g., Ettling and Eichsttät), southern Germany, are provided for a new genus and species, which is endemic of Ettling and for a new family, Ascalaboidae. The new family is only known from marine Upper Jurassic localities of Europe and is interpreted as an extinct and primitive group of Teleostei, which is considered the largest group within osteichthyans (bony fishes).
N. B. Fröbisch, A. Brar, and R. R. Reisz
Foss. Rec., 18, 73–80, https://doi.org/10.5194/fr-18-73-2015, https://doi.org/10.5194/fr-18-73-2015, 2015
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Here we describe a large specimen of the Paleozoic dissorophid amphibian Cacops woehri from the Fort Sill locality in Oklahoma, which was previously only known from a partial juvenile skull. The new data show that, in contrast to the closely related species C. morrisi, C. woehri underwent only subtle changes in skull morphology in late ontogeny, which indicates different functional demands possibly associated with a different ecology.
B. J. Burger and L. Tackett II
Foss. Rec., 17, 69–74, https://doi.org/10.5194/fr-17-69-2014, https://doi.org/10.5194/fr-17-69-2014, 2014
K. Kienapfel, S. Läbe, and H. Preuschoft
Foss. Rec., 17, 59–67, https://doi.org/10.5194/fr-17-59-2014, https://doi.org/10.5194/fr-17-59-2014, 2014
Cited articles
Batsch, A. J. G. C.: Versuch einer Anleitung, zur Kenntniß und
Geschichte der Thiere und Mineralien. Jena: Akademische Buchhandlung, 528 pp., 1788.
Bell, H. and Post, E. V.: Geology of the Flint Hill Quadrangle, Fall River
County, South Dakota, U. S. Geol. Surv. Bull., 1063-M, 505–586, 1971.
Bolyard, D. W. and McGregor, A. A.: Stratigraphy and petroleum potential of
Lower Cretaceous Inyan Kara Group in northeastern Wyoming, southeastern
Montana, and western South Dakota, Bull. Am. Ass. Petrol. Geol., 50,
2221–2244, 1966.
Bonde, J. W., Varricchio, D. J., Jackson, F. D., Loope, D. B., and Shirk, A.
M.: Dinosaurs and dunes! Sedimentology and paleontology of the Mesozoic in
the Valley of Fire State Park, Geol. Soc. Am. Field Guide, 11, 249–262,
2008.
Brinkman, D. B.: A review of nonmarine turtles from the Late Cretaceous of
Alberta, Can. J. Earth Sci., 40, 557–571, 2003.
Brinkman, D. B.: Turtles: diversity, paleoecology and distribution, in:
Dinosaur Provincial Park: A Spectacular Ancient Ecosystem Revealed, edited
by: Currie, P. J. and Koppelhus, E. B., Indiana University Press,
Bloomington, Indiana, 202–202, 2005.
Carpenter, K. and Bakker, R. T.: A new latest Jurassic vertebrate fauna, from
the highest levels of the Morrison Formation at Como Bluff, Wyoming, with
comments on Morrison biochronology, Part II. A new baenid turtle, Hunteria,
2, 1–6, 1990.
Cifelli, R. L., Gardner, J. D., Nydam R. L., and Brinkman, D. L.: Additions
to the vertebrate fauna of the Antlers Formation (Lower Cretaceous),
southeastern Oklahoma, Okla. Geol. Notes, 57, 124–131, 1997.
Cifelli, R. L., Nydam, R. L., Gardner, J. D., Weil, A., Eaton, J. G.,
Kirkland, J. I., and Madsen, S. K.: Medial Cretaceous vertebrates from the
Cedar Mountain Formation, Emery County, Utah: the Mussentuchit Local Fauna,
in: Vertebrate Paleontology in Utah, edited by: Gillette, D. D., Utah
Geological Survey, Salt Lake City, 219–242, 1999.
Cifelli, R. L., Davis, B. M., and Sames, B.: Earliest Cretaceous mammals
from the western United States, Act. Palaeontol. Pol., 59, 31–52, 2014.
Cope, E. D.: Descriptions of some new Vertebrata from the Bridger Group of
the Eocene, Proc. Am. Phil. Soc., 12, 460–465, 1873.
Dahlstrom, D. J. and Fox, J. E.: Fluvial architecture of the Lower
Cretaceous Lakota Formation, southwestern flank of the Black Hills Uplift,
South Dakota, B. U. S. Geol. Surv., 1917, S1–S20, 1995.
Dandavati, K. S.: Continental and near-shore depositional environments of
the Inyan Kara Group, southeastern Black Hills, South Dakota, in: Geology of
the Black Hills, South Dakota and Wyoming: Fieldtrip Guidebook, Geological
Society of America, 19–31, 1985.
Darton, N. H.: Preliminary description of the geology and water resources of
the southern half of the Black Hills and adjoining regions in South Dakota
and Wyoming, An. Rep. U. S. Geol. Surv., 21, 489–599, 1901.
DeCelles, P. G.: Late Jurassic to Eocene evolution of the Cordilleran thrust
belt and foreland basin system, Western USA, Am. J. Sci., 304, 105–168,
2004.
D'Emic, M. D., Foreman, B. Z., Jud, N. A., Britt, B. B., Schmitz, M., and
Crowley, J. L.: Chronostratigraphic revision of the Cloverly Formation
(Lower Cretaceous, Western Interior, USA), Bull. Peabody Mus. Nat. Hist.,
60, 3–40, 2019.
Evans, J. and Kemp, T. S.: The cranial morphology of a new Lower Cretaceous
turtle from Southern England, Palaeontol., 18, 25–40, 1975.
Evans, J. and Kemp, T. S.: A new turtle skull from the Purbeckian of England
and a note on the early dichotomies of cryptodire turtles, Palaeontol., 19,
317–324, 1976.
Gaffney, E. S.: The systematics of the North American family Baenidae
(Reptilia, Cryptodira), Bull. Am. Mus. Nat. Hist., 147, 241–320, 1972.
Gaffney, E. S.: A phylogeny and classification of higher categories of
turtles, Bull. Am. Mus. Nat. Hist., 155, 387–436, 1975.
Gaffney, E. S.: The Jurassic turtles of North America, Bull. Am. Mus. Nat.
Hist., 162, 91–136, 1979.
Gilmore, C. W.: New fossil turtles, with notes on two described species,
Proc. U. S. Nat. Mus., 56, 113–132, 1919.
Goloboff, P. A., Farris, J., and Nixon, K.: TNT: a free program for
phylogenetic analysis, Cladistics, 24, 774–786, 2008.
Goloboff, P. A., Torres, A., and Salvador Arias, J.: Weighted parsimony
outperforms other methods of phylogenetic inference under models appropriate
for morphology, Cladistics, 34, 407–437, 2018.
Gott, G. B., Wolcott, D. E., and Bowles, C. G.: Stratigraphy of the Inyan
Kara Group and localization of uranium deposits, southern Black Hills, South
Dakota and Wyoming, Geol. Surv. Prof. Pap., 763, 1–57, 1974.
Hay, O. P.: The Fossil Turtles of North America, Carn. Inst. Wash. Pub., 75,
1–568, 1908.
Joyce, W. G.: Phylogenetic relationships of Mesozoic turtles, Bull. Peabody
Mus. Nat. Hist., 48, 3–102, 2007.
Joyce, W. G. and Anquetin, J.: A review of the fossil record of non-baenid
turtles of the clade Paracryptodira, Bull. Peabody Mus. Nat. Hist., 60,
129–155, 2019.
Joyce, W. G. and Lyson, T. R.: A review of the fossil record of turtles of
the clade Baenidae, Bull. Peabody Mus. Nat. Hist., 56, 147–183, 2015.
Lipka, T. R., Therrien, F., Weishampel, D. B., Jamniczky, H. A., Joyce, W.
G., Colbert, M. W., and Brinkman, D. B.: A new turtle from the Arundel Clay
Facies (Potomac Formation, Early Cretaceous) of Maryland, USA, J. Vert.
Paleontol., 26, 300–307, 2006.
Lyson, T. R. and Joyce, W. G.: A new species of Palatobaena (Testudines: Baenidae) and
a maximum parsimony and Bayesian phylogenetic analysis of the Baenidae, J.
Paleontol., 83, 457–470, 2009a.
Lyson, T. R. and Joyce, W. G.: A revision of Plesiobaena (Testudines: Baenidae) and an
assessment of baenid ecology across the K/T boundary, J. Paleontol., 83,
833–853, 2009b.
Lyson, T. R. and Joyce, W. G.: A new baenid turtle from the Upper Cretaceous
(Maastrichtian) Hell Creek Formation of North Dakota and a preliminary
taxonomic review of Cretaceous Baenidae, J. Vert. Paleontol., 30, 394–402,
2010.
Lyson, T. R. and Joyce, W. G.: Cranial anatomy and phylogenetic placement of
the enigmatic turtle Compsemys victa Leidy, 1856, J. Paleontol., 85, 789–801, 2011.
Lyson, T. R., Joyce, W. G., Lucas, S. G., and Sullivan, R. M.: A new baenid
turtle from the early Paleocene (Torrejonian) of New Mexico and a species
level phylogenetic analysis of Baenidae, J. Paleontol., 90, 305–316, 2016.
Lyson, T. R., Sayler, J. L., and Joyce, W. G.: Anew baenid turtle,
Saxochelys gilberti, gen. et sp. nov., from the uppermost Cretaceous
(Maastrichtian) Hell Creek Formation: sexual dimorphism and spatial niche
partitioning within the most speciose group of Late Cretaceous turtles, J.
Vert. Paleontol., 39, e1662428, https://doi.org/10.1080/02724634.2019.1662428, 2019.
Marsh, O. C.: Notice of some extinct Testudinata, Am. J. Sci., 40, 177–179,
1890.
Milner, A. R.: The turtles of the Purbeck Limestone Group of Dorset,
southern England, Palaeontol., 47, 1441–1467, 2004.
Oreska, M. P. J., Carrano, M. T., and Dzikiewicz, K. M.: Vertebrate
paleontology of the Cloverly Formation (Lower Cretaceous), I: faunal
composition, biogeographic relationships, and sampling, J. Vert. Paleontol.,
33, 264–292, 2013.
Owen, R.: Report on British fossil reptiles, Part II, Rep. Brit. Ass. Adv.
Sci., 11, 60–204, 1842.
Pérez-García, A.: Revision of the poorly known Dorsetochelys typocardium, a relatively
abundant pleurosternid turtle (Paracryptodira) in the Early Cretaceous of
Europe, Cret. Res., 49, 152–162, 2014.
Pérez-García, A. and Ortega, F.: Selenemys lusitanica, gen. et sp. nov., a new
pleurosternid turtle (Testudines: Paracryptodira) from the Upper Jurassic of
Portugal, J. Vert. Paleontol., 31, 60–69, 2011.
Pérez-García, A., Espílez, E., Mampel, L., and Alcalá, L.:
A new European Albian turtle that extends the known stratigraphic range of
the Pleurosternidae (Paracryptodira), Cret. Res., 55, 74–83, 2015a.
Pérez-García, A., Royo-Torres, R., and Cobos, A.: A new European
Late Jurassic pleurosternid (Testudines, Paracryptodira) and a new
hypothesis of paracryptodiran phylogeny, J. Syst. Palaeontol., 13, 351–369,
2015b.
Post, E. V.: Geology of the Cascade Springs Quadrangle, Fall River County,
South Dakota, U. S. Geol. Surv. Bull., 1063-L, 443–504, 1967.
Sames, B.: Taxonomic studies in Early Cretaceous nonmarine Ostracoda of
North America, Micropaleontol, 57, 289–465, 2011.
Sames, B., Cifelli, R. L., and Schudack, M. E.: The nonmarine Lower
Cretaceous of the North American Western Interior foreland basin: new
biostratigraphic results from ostracod correlations and early mammals, and
their implications for paleontology and geology of the basin – an overview,
Earth Sci. Rev., 101, 207–224, 2010.
Seeley, H. G.: Index to the Fossil Remains of Aves, Ornithosauria, and
Reptilia, from the Secondary System of Strata Arranged in the Woodwardian
Museum of the University of Cambridge, Deighton, Bell, Cambridge, UK, 143 pp., 1869.
Sohn, I. G.: Nonmarine ostracodes in the Lakota Formation (Lower Cretaceous)
from South Dakota and Wyoming, Geol. Surv. Prof. Pap., 1069, 1–22, 1979.
Szigeti, G. J. and Fox, J. E.: Unkpapa Sandstone (Jurassic), Black Hills,
South Dakota: an eolian facies of the Morrison Formation, in: Recent and
Ancient Nonmarine Depositional Environments: Models for Exploration, edited
by: Ethridge, F. G. and and Flores, R. M., SEPM Society for Sedimentary
Geology, Tulsa, Oklahoma, 331–349, 1981.
Waagé, K. M.: Stratigraphy of the Inyan Kara Group in the Black Hills,
U. S. Geol. Surv. Bull., 1081-B, 11–90, 1959.
Walker, J. D., Geissman, J., Bowring, S. A., and Babcock, L. E.: Geologic
Time Scale v. 5.0, Geological Society of America, 2018.
Ward, L. F.: The Cretaceous rim of the Black Hills, J. Geol., 2, 250–266,
1894.
Way, J. N., O'Malley, P. J., Suttner, L. J., and Furer, L. C.: Tectonic
controls on alluvial systems in a distal foreland basin: the Lakota and
Cloverly formations (Early Cretaceous) in Wyoming, Montana and South Dakota,
Sp. Pub. Soc. Sed. Geol., 59, 133–147, 1998.
Zaleha, M. J.: Sevier orogenesis and nonmarine basin filling: implications
of new stratigraphic correlations of Lower Cretaceous strata throughout
Wyoming, USA, Bull. Geol. Soc. Am., 118, 886–896, 2006.
Short summary
Baenids are a group of fossil turtles with a rich fossil record that spans from the Late Cretaceous (Campanian) to Eocene of North America. Only a few fossils are known that document the early evolution of the group. We here describe a new species of baenid, Lakotemys australodakotensis, from the Early Cretaceous (Berriasian to Valanginian) Lakota Formation of South Dakota, USA. Phylogenetic analysis suggests that this is the oldest known baenid turtle.
Baenids are a group of fossil turtles with a rich fossil record that spans from the Late...
