New latest Cretaceous mammals from northeastern Colorado with biochronologic and biogeographic implications

Wilson, Gregory P.; Dechesne, Marieke; Anderson, Ingrid R.

doi:10.1080/02724631003620955

Cited by 23 publications

(14 citation statements)

References 70 publications

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“…Meniscoessus robustus is from the latest Cretaceous of Alberta, Saskatchewan, Montana, Wyoming, the Dakotas, and Colorado (Kielan‐Jaworowska et al ., ; Wilson, Dechesne & Anderson, ). Descriptions and illustrations used to score Men.…”

Section: Phylogenetic Analysismentioning

confidence: 99%

A new taeniolabidoid multituberculate (Mammalia) from the middle Puercan of the Nacimiento Formation, New Mexico, and a revision of taeniolabidoid systematics and phylogeny

et al. 2015

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Multituberculates were amongst the most abundant and taxonomically diverse mammals of the late Mesozoic and the Palaeocene, reaching their zenith in diversity and body size in the Palaeocene. Taeniolabidoidea, the topic of this paper, includes the largest known multituberculates, which possess highly complex cheek teeth adapted for herbivory. A new specimen from the early Palaeocene (middle Puercan; biochron Pu2) of the Nacimiento Formation, New Mexico represents a new large-bodied taeniolabidoid genus and species, Kimbetopsalis simmonsae. A phylogenetic analysis to examine the relationships within Taeniolabidoidea that includes new information from Kimbetopsalis gen. et sp. nov. and gen. nov. and from new specimens of Catopsalis fissidens, first described here, and data from all other described North American and Asian taeniolabidoids. This analysis indicates that Catopsalis is nonmonophyletic and justifies our transfer of the basal-most taeniolabidoid 'Catopsalis' joyneri to a new genus, Valenopsalis. Kimbetopsalis and Taeniolabis form a clade (Taeniolabididae), as do the Asian Lambdopsalis, Sphenopsalis, and possibly also Prionessus (Lambdopsalidae). Taeniolabidoids underwent a modest taxonomic radiation during the early Palaeocene of North America and underwent a dramatic increase in body size, with Taeniolabis taoensis possibly exceeding 100 kg. Taeniolabidoids appear to have gone extinct in North America by the late Palaeocene but the appearance of lambdopsalids in the late Palaeocene of Asia suggests that they dispersed from North America in the early to middle Palaeocene.

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Section: Phylogenetic Analysismentioning

confidence: 99%

A new taeniolabidoid multituberculate (Mammalia) from the middle Puercan of the Nacimiento Formation, New Mexico, and a revision of taeniolabidoid systematics and phylogeny

et al. 2015

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“…The fossil record of Late Cretaceous marsupials is almost entirely restricted to the Western Interior of North America, where several endemic families are represented, primarily by isolated teeth and incomplete jaws with teeth (e.g., Marsh 1889;Matthew 1916;Simpson 1928Simpson , 1929Russell 1952;Clemens 1966Clemens , 1979Lillegraven 1969;Fox 1971Fox , 1987Fox , 1989Sahni 1972;Cifelli and Eaton 1987;Cifelli 1990Cifelli , 2004Johanson 1996;Davis 2007;Wilson et al 2010). Although marsupials flourished during Aquilan through Lancian time in North America, they suffered substantial losses in taxonomic diversity at the Cretaceous-Paleogene boundary, with but a single family, the Peradectidae, having either survived the extinction event or having first appeared during the earliest parts of the Paleocene (e.g., Matthew and Granger 1921;Archibald 1982;Eberle and Lillegraven 1998, and see the contrasting opinions on the systematics of Late Cretaceous marsupials by, e.g., Clemens 1966;Eaton 1993;Johanson 1996;Wilson 2005Wilson , 2013Williamson et al 2012).…”

Section: Introductionmentioning

confidence: 99%

Review of Stagodontidae (Mammalia, Marsupialia) from the Judithian (Late Cretaceous) Belly River Group of southeastern Alberta, Canada

Scott

Fox

2015

Can. J. Earth Sci.

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Although stagodontid marsupials are among the most distinctive mammals of Late Cretaceous age in North America, there remain significant gaps in knowledge of their dental anatomy, particularly that of the stratigraphically oldest genus, Eodelphis Matthew, 1916. We report here on stagodontid specimens from the Judithian Belly River Group of southeastern Alberta, Canada, that document what was until now previously unknown parts of the upper and lower premolar dentition of Eodelphis browni Matthew, 1916 and Eodelphis cutleri (Smith Woodward, 1916). The new information further confirms the distinctiveness of both nominal species of Eodelphis, and bolsters previous hypotheses suggesting a close phylogenetic relationship between E. cutleri and the advanced stagodontid Didelphodon Marsh, 1889. Although the new specimens from Alberta suggest that the problematic holotype of "Boreodon matutinus" Lambe, 1902 is an upper third premolar, a referral to Eodelphis cannot be made with confidence and the name should continue to be treated as a nomen dubium. Lastly, we report the first occurrence of Didelphodon in strata of the Belly River Group, extending the geological age of the genus into the Judithian, co-eval with species of Eodelphis, and suggesting a significant prior and as yet undiscovered evolutionary history.Résumé : Si les marsupiaux stagodontidés figurent parmi les mammifères les plus distinctifs du Crétacé tardif en Amérique du Nord, d'importantes lacunes persistent dans les connaissances sur leur anatomie dentaire, en particulier celle du plus vieux genre, d'un point de vue stratigraphique, Eodelphis Matthew, 1916. Nous rendons compte de spécimens de stagodontidés du Groupe de Belly River du Judithien du sud-est de l'Alberta (Canada), qui documentent des parties jusqu'ici inconnues de la dentition prémolaire supérieure et inférieure d'Eodelphis browni Matthew, 1916 et d'Eodelphis cutleri (Smith Woodward, 1916. Les nouvelles données confirment le caractère distinctif des deux espèces nominales d'Eodelphis et appuient des hypothèses antéri-eures qui postulent un lien phylogénétique étroit entre E. cutleri et le stagodontidé avancé Didelphodon Marsh, 1889. Bien que les nouveaux spécimens de l'Alberta indiquent que l'holotype problématique de "Boreodon matutinus" Lambe, 1902 est une troisième prémolaire supérieure, il n'est pas possible de l'affecter avec confiance à Eodelphis et le nom devrait continuer d'être traité comme un nomen dubium. Enfin, nous signalons la première découverte de Didelphodon dans des strates du Groupe de Belly River, ce qui étend l'âge géologique du genre au Judithien, donc contemporain des espèces d'Eodelphis, et indiquerait une importante évolution préalable non découverte à ce jour. [Traduit par le Rédaction]

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“…Marsupials, of which there are about 340 species, are largely confined geographically to Australia and South America, besides a few opossum species (didelphids) distributed in Central and North America. Placentals have a worldwide distribution on land and in the seas and are much more diverse, with 5138 species (Wilson and Reeder 2005;Dickman 2007;Ceballos and Ehrlich 2009;Voss and Jansa 2009). The evolutionary success of placentals seems tremendous when compared with their sister group the marsupials or with egg-lying mammals, the monotremes (Lillegraven et al 1987;Sears 2004;Cooperand Steppan 2010).…”

Section: Introductionmentioning

confidence: 99%

Why are There Fewer Marsupials than Placentals? On the Relevance of Geography and Physiology to Evolutionary Patterns of Mammalian Diversity and Disparity

Sánchez‐Villagra

2012

J Mammal Evol

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Placental mammals occupy a larger morphospace and are taxonomically more diverse than marsupials by an order of magnitude, as shown by quantitative and phylogenetic studies of several character complexes and clades. Many have suggested that life history acts as a constraint on the evolution of marsupial morphology. However, the frequent circumvention of constraints suggests that the pattern of morphospace occupation in marsupials is more a reflection of lack of ecological opportunity than one of biases in the production of variants during development. Features of marsupial physiology are a potential source of biases in the evolution of the group; these could be coupled with past macroevolutionary patterns that followed conditions imposed by global temperature changes. This is evident at the K/Pg boundary and at the Eocene/Oligocene boundary. The geographic pattern of taxonomic and morphological diversity in placental clades mirrors that of extant placentals as a whole versus marsupials: placentals of northern origin are more diverse those of southern one and include the clades that are outliers in taxonomic (rodents and bats) and ecomorphological (whales and bats) richness.

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New latest Cretaceous mammals from northeastern Colorado with biochronologic and biogeographic implications

Cited by 23 publications

References 70 publications

A new taeniolabidoid multituberculate (Mammalia) from the middle Puercan of the Nacimiento Formation, New Mexico, and a revision of taeniolabidoid systematics and phylogeny

A new taeniolabidoid multituberculate (Mammalia) from the middle Puercan of the Nacimiento Formation, New Mexico, and a revision of taeniolabidoid systematics and phylogeny

Review of Stagodontidae (Mammalia, Marsupialia) from the Judithian (Late Cretaceous) Belly River Group of southeastern Alberta, Canada

Why are There Fewer Marsupials than Placentals? On the Relevance of Geography and Physiology to Evolutionary Patterns of Mammalian Diversity and Disparity

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