Dispersal of Vertebrates from Between the Americas, Antarctica, and Australia in the Late Cretaceous and Early Cenozoic

Goin, Francisco J.; Woodburne, Michael O.; Zimicz, Ana Natalia; Martín, Gabriel M.; Chornogubsky, Laura

doi:10.1007/978-94-017-7420-8_3

Cited by 25 publications

(12 citation statements)

References 99 publications

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“…this could be tentatively followed, as the protodidelphids of the Itaboraí Basin show a relative degree of morphological and ecological specialization, with "basal" and apical taxa in the same locality; however, the lower Eocene time span of the Itaboraí Basin, as proposed by Woodburne et al (2014a, b), is here followed based on the bunoid adaptations present in the apical protodidelphids of this fauna, which are compatible with the increase of the extension of the tropical forests, as proposed by Woodburne et al (2014b). these evidences follow the results of Goin et al (2012Goin et al ( , 2016 and Woodburne et al (2014a, b), who considered the Itaboraí Basin as lower Eocene in age, and attested the importance of the PEtM as one of the most important environmental events during the Paleogene for the evolution of the South American metatherians.…”

Section: Discussionsupporting

confidence: 89%

A new protodidelphid (Mammalia, Marsupialia, Didelphimorphia) from the Itaboraí Basin and its implications for the evolution of the Protodidelphidae

Carneiro

2019

An. Acad. Bras. Ciênc.

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the Protodidelphidae was a group of marsupials that lived in Gondwana from the early to middle Eocene. Among South American faunas, the Itaboraí Basin calls attention by the presence of four genera and six species. herein is described Bergqvistherium primigenia gen. et sp. nov., a new protodidelphid from the Itaboraí Basin-lower Eocene. This taxon differs from other protodidelphids in the smaller size, developed entocristid, less brachyo-bunoid adaptations, and entoconid more mesial than the hypoconid. these characters are recovered as plesiomorphies of the Protodidelphidae, supporting Bergqvistherium as an early-divergent lineage of this group. the Protodidelphidae fauna of the Itaboraí Basin is represented by less specialized "basal" taxa, such as Bergqvistherium and Periprotodidelphis; and more specialized apical taxa, such as Guggenheimia, Protodidelphis, and Carolocoutoia. This result indicates that the diversification of apical protodidelphids probably was a result of a relatively short-time event, occurring during the early Eocene. this evolutionary event can be directly correlated to the increase in the temperatures and the extension of tropical forests resulted by the Paleocene-Eocene thermal Maximum during the Itaboraiense time span. the study supported a Late Cretaceous origin for the Protodidelphidae, which agrees with molecular studies for the Didelphimorphia.

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Section: Discussionsupporting

confidence: 89%

A new protodidelphid (Mammalia, Marsupialia, Didelphimorphia) from the Itaboraí Basin and its implications for the evolution of the Protodidelphidae

Carneiro

2019

An. Acad. Bras. Ciênc.

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“…This agrees well with previous hypotheses suggesting multiple origins of South American clades (e.g. Case et al, 2005;Forasiepi, 2009;Goin et al, 2012Goin et al, , 2016Carneiro & Oliveira, 2017a, b;Carneiro, 2018). That is, South American clades were not the result of a single radiation but instead of successive marsupialiform radiations from North America via Caribbean Plate.…”

Section: Paleobiogeographic Implicationssupporting

confidence: 92%

“…Since its original description by Marshall & Muizon (1988), pediomyid affinities were suggested for this taxon from the lower Paleocene of Tiupampa, Bolivia (see also Muizon, 1992). Oliveira & Goin (2012) and Goin et al (2016) included Khasia within the Pediomyidae, basically acknowledging that several of its most distinctive features match the basic pediomyoid derived features (sensu Davis, 2007). The phylogenetic analysis of our study supports Khasia as a pediomyid.…”

Section: Affinities Of Austropediomys and Other Late Cretaceous--earlmentioning

confidence: 99%

“…The fossil record of this family is known from the upper Santonian to the uppermost Maastrichtian, with no confirmed record for the Cenozoic of that continent (Clemens, 1966;Eaton, 2006Eaton, , 2013Davis, 2007;Williamson et al, 2012Williamson et al, , 2014Wilson, 2014). Notwithstanding, possible pediomyioids have been reported for South America in: (i) the lower Paleocene of Tiupampa, Bolivia (Case & Woodburne, 1986;Muizon, 1992;Oliveira & Goin, 2012;Woodburne et al, 2014;Goin et al, 2016), (ii) Laguna Umayo, southern Peru (Sigé, 1972), currently dated as upper Paleocene-lower Eocene (Sigé et al, 2004;Gelfo & Sigé, 2011); and (iii) the lower Eocene of Itaboraí Basin, Brazil (Marshall, 1987;Marshall et al, 1990;Oliveira, 1998;Oliveira & Goin, 2012). Based on tarsal morphological elements, Szalay (1994) stated that the lower ankle joint of some specimens from Itaboraí (his "Itaboraí Metatherian Group 1" sample) "…are very similar to the peradectine and pediomyine patterns" (Szalay, 1994, p. 164).…”

Section: Introductionmentioning

confidence: 99%

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Austropediomys marshalli gen. et sp. nov., a new Pediomyoidea (Mammalia, Metatheria) from the Paleogene of Brazil: paleobiogeographic implications

Carneiro

Oliveira

Goin

2018

Rev. bras. paleontol.

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The Pediomyiodea has been largely regarded as a Late Cretaceous North American metatherian lineage; however, some studies have suggested that a few South American taxa could be related to this family. Herein, Austropediomys marshalli gen. et sp. nov. from the Itaboraí Basin, Brazil (lower Eocene-Itaboraian SALMA), is described. Austropediomys gen. nov. represents the first report of a pediomyoid metatherian in the Paleogene of South America backed by a phylogenetic analysis. Several derived features in the upper molars support its belonging to the Pediomyoidea: presence of accessory 'conular-like' structures (here named conuloids) lingual to the conules; supernumerary stylar cusps; asymmetric stylar shelf, with parastylar shelf reduced to a narrow rim in M1; straight centrocrista; short and obliquely oriented prepacrista, which contacts StA in M2-3. The presence of 'conular-like' structures lingual to the paraconule and metaconule is identified in Austropediomys gen. nov. and in Late Cretaceous pediomyoids as well, and results in the phylogenetic analysis as a synapomorphy of the Pediomyoidea. Austropediomys gen. nov. is autapomorphyc in the presence of enlarged conuloids on protocristae. The record of a pediomyoid in the Paleogene of South America increases the temporal and biogeographical range of this lineage. Also, our results support the hypothesis that several non-related metatherian lineages dispersed from North to South America via the Caribbean Plate, most probably during the latest Cretaceous, in an island-hopping or sweepstakes model.

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“…Regarding the probable dispersal route between North and South America, the 'Aves Ridge' and adjacent Cuba were indicated as the best pathway candidates for the dispersal route between both landmasses (Bonaparte, 1984;Woodburne & Case, 1996;Case et al, 2005;Pascual, 2006;Pascual & Ortiz-Jaureguizar, 2007;Goin et al, 2016;Carneiro & Oliveira, 2017). The volcanic activity during the Late Cretaceous (Pindell, 1994) associated with strong sea-level lowstands during the late Campanian (around 73 Ma) and the late Maastrichtian (around 66 Ma) (Eaton, 1993b;Haq, 2014;Carneiro & Oliveira, 2017;Carneiro, 2017) probably allowed a sweepstakes dispersal pattern for them; with a hopping-island model as the best model for their dispersal.…”

Section: Paleobiogeography Of Stagodontidaementioning

confidence: 99%

Systematic affinities of the extinct metatherian Eobrasilia coutoi Simpson, 1947, a South American Early Eocene Stagodontidae: implications for "Eobrasiliinae"

Carneiro¹,

Oliveira²

2017

Rev. bras. paleontol.

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-Eobrasilia coutoiSimpson is currently considered one of the most enigmatic metatherian mammals of Itaboraí Basin, Brazil. A single badly broken and incomplete skull, with a single strongly worn M3, and an associated fragmentary dentary are the elements currently attributed to this taxon. This fragmentary condition contributes for its uncertain position within Metatheria. Herein, the preserved dental morphology of this species is re-analyzed. The morphology of these structures, such as a tiny, obliquely oriented, one-rooted P1; absence of retro-premolar spaces between the premolars and mesiodistally developed p3, supports the assignment of Eobrasilia as a South American stagodontid. This new result leads a systematic review of the affinities of "Eobrasiliinae", currently represented by Eobrasilia, Gaylordia and Didelphopsis. The hypothesis that "Eobrasiliinae" represents a valid taxon is refuted in the phylogenetic analysis, which recovered Eobrasilia as more closely related to Didelphodon within Stagodontidae, Gaylordia as the sister taxon of Tiulordia and more closely related to Minusculodelphis and Marmosopsis, and Didelphopsis as the sister taxon of Itaboraidelphys and more closely related to Herpetotherium, Carolopaulacoutoia and Derorhynchus. The shared characters between Eobrasilia, Gaylordia and Didelphopsis were likely a result of convergent evolution, as these three lineages independently adapted to more durophagous diets. The phylogenetic analysis did not support the sister relation between Fumodelphodon and Didelphodon and Eodelphis and Hoodootherium. The grouping of Eobrasilia and Didelphodon corroborates the previous hypothesis that Metatheria dispersed from North to South America during the Late Cretaceous.Key words: Early Eocene, Eobrasilia, "Eobrasiliinae", Itaboraí, Stagodontidae, systematics. RESUMO -Eobrasilia coutoiSimpson é considerado atualmente como um dos metatérios mais enigmáticos da Bacia de Itaboraí, Brasil. Um crânio muito fragmentado e incompleto com um M3 muito desgastado, e um dentário fragmentado são os únicos elementos atribuídos a esse táxon. Essa "fragmentação" dos materiais associados ao gênero Eobrasilia contribui para a sua posição incerta dentro do clado dos Metatheria. Aqui, a morfologia dentária preservada dessa espécie é reanalisada. A presença de um P1 pequeno, com uma orientação oblíqua em relação aos P2-3 e com uma única raiz; ausência de espaços retro-premolares entre os pré-molares e o evidente desenvolvimento mesiodistal do p3 suportam a associação de Eobrasilia como um stagodontídeo sul-americano. Esse novo resultado levou a uma revisão sistemática das afinidades dos "Eobrasiliinae", previamente representado por Eobrasilia, Gaylordia e Didelphopsis. A hipótese de que "Eobrasiliinae" representa um táxon válido é refutada pela análise filogenética, que recuperou Eobrasilia como grupo-irmão de Didelphodon e pertencente à família Stagodontidae; Gaylordia como táxon irmão de Tiulordia, sendo ambos mais próximos filogeneticamente de Minusculodelphis e Marmoso...

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Dispersal of Vertebrates from Between the Americas, Antarctica, and Australia in the Late Cretaceous and Early Cenozoic

Cited by 25 publications

References 99 publications

A new protodidelphid (Mammalia, Marsupialia, Didelphimorphia) from the Itaboraí Basin and its implications for the evolution of the Protodidelphidae

A new protodidelphid (Mammalia, Marsupialia, Didelphimorphia) from the Itaboraí Basin and its implications for the evolution of the Protodidelphidae

Austropediomys marshalli gen. et sp. nov., a new Pediomyoidea (Mammalia, Metatheria) from the Paleogene of Brazil: paleobiogeographic implications

Systematic affinities of the extinct metatherian Eobrasilia coutoi Simpson, 1947, a South American Early Eocene Stagodontidae: implications for "Eobrasiliinae"

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