Revision of the Eocene artiodactyls (Mammalia, Placentalia) from Aumelas and Saint-Martin-de-Londres (Montpellier limestones, Hérault, France) questions the early European artiodactyl radiation

Luccisano, Vincent; Sudre, Jean; Lihoreau, Fabrice

doi:10.1080/14772019.2020.1799253

Cited by 8 publications

(7 citation statements)

References 26 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…Homacodontidae is not monophyletic, and Hexacodus represents the most basal taxon consistent with its primitive characters and early Eocene age. It is interesting that Dichobune is more closely related to homacodontids than to other European endemic artiodactyls, consistent with the topology of basal artiodactyls by Luccisano et al (2020).…”

Section: Phylogenetic Position Of Obotherium and Tapiruloidessupporting

confidence: 60%

“…Protodichobune and Eurodexis are successive sister groups to Lantianiinae-Hyperdichobuninae and Homacodontidae-Dichobune-Cuisitherium-Ruminantia-Tapirulidae clade. Diacodexis is not monophyletic, and D. antunesi is a sister group to other early artiodactyls in this analysis; but Diacodexis is monophyletic in theLuccisano et al (2020) …”

contrasting

confidence: 56%

“…The European endemic Amphimerycidae including Amphimeryx and Pseudamphimeryx was considered to be more closely related to xiphodontids or dacrytheriids than to ruminants, although a fused cubonavicular is present in Amphimeryx collatarsus (Erfurt and Métais, 2007). Similarly, Amphimerycidae is a sister group to Archaeomeryx within European bunoselenodont families (Luccisano et al, 2020), suggesting it is allied with ruminants (Simpson, 1945;McKenna and Bell, 1997). Cuisitherium is controversial, having been assigned to Dacrytheriidae (Sudre et al, 1983), Choeropotamidae (Hooker and Thomas, 2001;Erfurt and Métais, 2007), or Haplobunodontidae (Luccisano et al, 2020).…”

Section: Phylogenetic Position Of Obotherium and Tapiruloidesmentioning

confidence: 99%

“…Similarly, Amphimerycidae is a sister group to Archaeomeryx within European bunoselenodont families (Luccisano et al, 2020), suggesting it is allied with ruminants (Simpson, 1945;McKenna and Bell, 1997). Cuisitherium is controversial, having been assigned to Dacrytheriidae (Sudre et al, 1983), Choeropotamidae (Hooker and Thomas, 2001;Erfurt and Métais, 2007), or Haplobunodontidae (Luccisano et al, 2020). Our analyses indicate that Cuisitherium is probably allied with ruminants and tapirulids.…”

Section: Phylogenetic Position Of Obotherium and Tapiruloidesmentioning

confidence: 99%

See 3 more Smart Citations

Small artiodactyls with tapir-like teeth from the middle Eocene of the Erlian Basin, Inner Mongolia, China

Bai

Wang²,

Theodor³

et al. 2023

Front. Earth Sci.

View full text Add to dashboard Cite

Artiodactyls diversified during the Eocene and Oligocene in North America and Europe after their first Holarctic appearance at the beginning of the Eocene. However, the relationships among early artiodactyls, European endemic forms, and later derived suiforms, tylopods, and ruminants remain unclear. Early artiodactyls are relatively rare in Asia compared to those known from North America and Europe; thus, investigation of Eocene artiodactyls from Asia is important to resolve these issues. Here we report two new genera and three new species of small early artiodactyls from middle Eocene deposits of the Erlian Basin, Inner Mongolia, China. The new materials represent a morphologically gradational series from Asian Land Mammal Ages Irdinmanhan to Sharamurunian, characterized by a trend towards bilophodonty in the lower molars. Morphologic and phylogenetic analyses suggest that these new taxa have a close relationship with the enigmatic European Tapirulus, which currently consists of five species that range from the middle Eocene to the early Oligocene. The close relationship between the Erlian specimens and Tapirulus suggests possible faunal exchanges between Europe and Asia during the middle Eocene, a view that has been supported by other mammalian groups across the two continents. The evolution of bilophodonty in Tapirulidae and Raoellidae is probably attributable to convergence.

show abstract

Section: Phylogenetic Position Of Obotherium and Tapiruloidessupporting

confidence: 60%

contrasting

confidence: 56%

Section: Phylogenetic Position Of Obotherium and Tapiruloidesmentioning

confidence: 99%

Section: Phylogenetic Position Of Obotherium and Tapiruloidesmentioning

confidence: 99%

See 2 more Smart Citations

Small artiodactyls with tapir-like teeth from the middle Eocene of the Erlian Basin, Inner Mongolia, China

Bai

Wang²,

Theodor³

et al. 2023

Front. Earth Sci.

View full text Add to dashboard Cite

show abstract

“…4), who retrieved Mixtotherium at the base of a clade gathering Anoplotheriidae and Cainotherioidea. Finally, Luccisano et al (2020;fig. 7b) in a larger scale analysis, found Mixtotherium at the base of all European bunoselenodont families.…”

Section: Introductionmentioning

confidence: 97%

Brain damage: the endocranial cast of Mixtotherium cuspidatum (Mammalia, Artiodactyla) from the Victor Brun Museum (Montauban, France)

Orliac¹,

Bouaziz²,

Weppe³

2021

View full text Add to dashboard Cite

Our knowledge of the external brain morphology of the late Eocene artiodactyl ungulate Mixtotherium, relies on a plaster model realized on a specimen from the Victor Brun Museum in Montauban (France) and described by Dechaseaux (1973). Here, based on micro CT-scan data, we virtually reconstruct the 3D cast of the empty cavity of the partial cranium MA PHQ 716 from the Victor Brun Museum and compare it to the plaster model illustrated and described by Dechaseaux (1973). Indeed, the specimen from which the original plaster endocast originates was not identified by Dechaseaux by a specimen number. We confirm here that the studied specimen was indeed the one described and illustrated by Dechaseaux (1973). We also reconstruct a second, more detailed, model providing additional morphological and quantitative observations made available by micro CT scan investigation such as precisions on the neopallium folding and endocranial volumes.

show abstract

Paleoneurology of Artiodactyla, an Overview of the Evolution of the Artiodactyl Brain

Orliac

Maugoust

Balcarcel

et al. 2022

Paleoneurology of Amniotes

View full text Add to dashboard Cite

This chapter presents a detailed review of works published on Artiodactyla endocasts and provides a comprehensive examination of artiodactyl brain evolutionary history, including Cetacea, from the early Eocene (c.a. 45 Ma) onwards. Artiodactyl endocasts have been actively studied from the second half of the 19 th century to the 1970's. These works on natural or artificial endocasts widely took place outside the frame of phylogenetic concerns. We compile here the data available, including recent works using µCT-scan imagery techniques, and place them in a phylogenetic framework. We also provide new additional data regarding paleogene representatives of North American extinct clades (Homacodon, Helohyus, Leptauchenia, Agriochoerus), endemic European clade (Mouillacitherium, Dichobune), and Suoidea (Palaeochoerus) to complete the picture. The brain of modern artiodactyls is remarkable by the expansion and by the folding of the neopallium. We highlight the diversity of neopallium patterns at the Artiodactyla scale and their convergent nature on the last 45 millions years and show that encephalization increases with time, but with different modes between terrestrial and fully aquatic taxa (i.e. Cetacea). Each clade shows a mosaic pattern of derived and plesiomorphic features that now has to be put in perspective with both the history and the ecology of taxa.

show abstract

Revision of the Eocene artiodactyls (Mammalia, Placentalia) from Aumelas and Saint-Martin-de-Londres (Montpellier limestones, Hérault, France) questions the early European artiodactyl radiation

Cited by 8 publications

References 26 publications

Small artiodactyls with tapir-like teeth from the middle Eocene of the Erlian Basin, Inner Mongolia, China

Small artiodactyls with tapir-like teeth from the middle Eocene of the Erlian Basin, Inner Mongolia, China

Brain damage: the endocranial cast of Mixtotherium cuspidatum (Mammalia, Artiodactyla) from the Victor Brun Museum (Montauban, France)

Paleoneurology of Artiodactyla, an Overview of the Evolution of the Artiodactyl Brain

Contact Info

Product

Resources

About