Remains of Hegetotheriinae (Hegetotheriidae, Notoungulata) from several sites of La Pampa Province

Cerdeño, Esperanza; Montalvo, Claudia I.

doi:10.22179/revmacn.4.20

Cited by 15 publications

(18 citation statements)

References 0 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…Contreras et al (2013) indicated that although the evolutionary grade of octodontid rodents indicates that the older levels of the Cerro Azul Formation are found in Laguna Chillhué and Cerro La Bota, the evaluation of the associations as a whole ( e.g. , Montalvo et al , 1995; Cerdeño & Montalvo, 2001, 2002) shows relationships with both the Chasicoan and the “Huayquerian” Stages/Ages. However, more recently, based on a new interpretation of the evolution of other rodent lineages (Piñero et al , 2021, fig.…”

Section: Resultsmentioning

confidence: 99%

Advances in the Understanding of Neogene Mammalian Fauna in the Pampean Region (Central Argentina) Through Revising “Biozone” Hypotheses Based on New Dates and Biochronological Analyses

Romano¹,

Bonini²,

Hemming³

et al. 2023

Ameghiniana

View full text Add to dashboard Cite

Fossil vertebrates, especially mammals, of the Neogene-Quaternary of Central Argentina were fundamental to the construction of time and rock-time scales and the knowledge of the biotic evolution of southern South America. The poverty of fossiliferous localities constrained with radiometric and/or paleomagnetic data heavily complicated the correlation of different faunas and their temporal allocation. The Cerro Azul Formation (Argentina) constitutes a suitable example of this situation but also enlarged because its fossils have been collected from scattered and isolated small outcrops whose chronological ordering was based on the "stage of evolution" of some rodents. We present here new dates for the fauna/locality of Telén (La Pampa Province) plus extensive biochronological analyses covering 16 fossiliferous localities referred to Cerro Azul Formation. Two dates from an "escoria" sample gave 7.09 Ma for Telén assemblage, an age in accordance with that obtained from an independent faunal analysis. Faunal ordination and age obtained with regression analyses identify a succession of faunas/localities that cover the time range between 8-5.33 Ma. The older assemblages (e.g., Cerro Bota) appear to be transitional between Chasicoan and "Huayquerian" faunas. The first records of procyonids and cricetid rodents, two North American lineages, are not synchronic (7 and 5.7 Ma, respectively). Our results show important temporal overlapping among the proposed successive rodent "biozones". The use of the "stage of evolution" in the analyses does not improve the results, suggesting that its application without independent chronological/ biostratigraphical constraints is not appropriate.

show abstract

Section: Resultsmentioning

confidence: 99%

Advances in the Understanding of Neogene Mammalian Fauna in the Pampean Region (Central Argentina) Through Revising “Biozone” Hypotheses Based on New Dates and Biochronological Analyses

Romano¹,

Bonini²,

Hemming³

et al. 2023

Ameghiniana

View full text Add to dashboard Cite

show abstract

“…Following Croft and Anaya (2006:table 1), we re-score Hemihegetotherium trilobus with state 0. Hemihegetotherium achathaleptum and Tremacyllus impressus present both conditions, according to Cerdeño and Montalvo (2002) and Vera and Ercoli (2018:table 1), respectively, and we re-score these species as (0 1).…”

Section: Character Scoringsmentioning

confidence: 99%

“…achathaleptum and Hm. torresi by Cerdeño and Montalvo [2002], Montalvo et al [2019], andSostillo et al [2021]). Other studies included two or three species of Hemihegetotherium that were recovered as a clade in most of them (Croft & Anaya, 2006;Kramarz & Bond, 2017;, except for Seoane et al (2017).…”

Section: Phylogenetic Nomenclaturementioning

confidence: 99%

“…2; for an updated revision of Propachyrucos see Seoane et al, 2019). With respect to subfamily Hegetotheriinae , the complete dental series of MACN-PV 2540 differs from Sallatherium altiplanense (lacking lower canine; Reguero & Cerdeño, 2005), some specimens of Hegetotherium mirabile (lacking lower canine; Seoane & Cerdeño, 2019), and most specimens of Hemihegetotherium achathaleptum (lacking lower p1; Cerdeño & Montalvo, 2002). Also, T. burmeisteri differs from Sallatherium in the i3, which is more than 50% shorter (Table 1; Reguero & Cerdeño, 2005: table 2); the concave lingual wall of the p2 (straight in Sallatherium ); the proportion of the p3, with the talonid slightly longer than the trigonid, contrary to Sallatherium ; and the presence of a buccal talonid groove in the m3 (but both species are scored as m3 bilobed; see Phylogenetic Analysis section).…”

Section: Systematic Paleontologymentioning

confidence: 99%

“…P1/p1: present or variably present (0); always absent (1). This character was introduced by Croft and Anaya (2006) to represent the variable condition (present/absent) of the p1 observed in Hemihegetotherium achathaleptum by Cerdeño and Montalvo (2002). Vera (2019) discussed this feature, reinterpreting the holotype of Hemihegetotherium robustum MACN-PV 8156 (synonymized with Hm .…”

Section: Phylogenetic Analysismentioning

confidence: 99%

See 2 more Smart Citations

Reassessment of Tegehotherium burmeisteri Ameghino 1903–1904 ( Notoungulata , Hegetotheriidae ) and a new phylogenetic analysis of Hegetotheriidae

Seoane,

Cerdeño,

Gaetano

2023

Journal of Vertebrate Paleontology

Self Cite

View full text Add to dashboard Cite

Within the notoungulate family Hegetotheriidae, some species have not been analyzed since their original publication more than a century ago. Here we present the first re-evaluation of Tegehotherium burmeisteri, including a detailed description of its holotype in an updated comparative framework, a species presumably coming from the Trelew Member of the Sarmiento Formation (Chubut Province, Argentina). Tegehotherium burmeisteri is included for the first time in a phylogenetic analysis centered in the interrelationships of hegetotheriids and defining clades according to the PhyloCode. Tegehotherium burmeisteri is recovered as a hegetotheriine closely related to Sallatherium and Hegetotherium; Hegetotheriopsis sulcatus is the earliest branch of the clade Hegetotheriidae, whereas Prohegetotherium and Paedotherium turn out to be paraphyletic, reinforcing results obtained in recent studies. The family Hegetotheriidae and both subfamilies, Hegetotheriinae and Pachyrukhinae, are recovered as monophyletic groups and defined phylogenetically, as well as two new clades: Pachyrukhini and Hemihegetotheriomorpha.

show abstract

Vertebrate taphonomy in loess-palaeosol deposits: A case study from the late Miocene of central Argentina

Montalvo

Melchor

Visconti

et al. 2008

Geobios

View full text Add to dashboard Cite

Remains of Hegetotheriinae (Hegetotheriidae, Notoungulata) from several sites of La Pampa Province

Cited by 15 publications

References 0 publications

Advances in the Understanding of Neogene Mammalian Fauna in the Pampean Region (Central Argentina) Through Revising “Biozone” Hypotheses Based on New Dates and Biochronological Analyses

Advances in the Understanding of Neogene Mammalian Fauna in the Pampean Region (Central Argentina) Through Revising “Biozone” Hypotheses Based on New Dates and Biochronological Analyses

Reassessment of Tegehotherium burmeisteri Ameghino 1903–1904 ( Notoungulata , Hegetotheriidae ) and a new phylogenetic analysis of Hegetotheriidae

Vertebrate taphonomy in loess-palaeosol deposits: A case study from the late Miocene of central Argentina

Contact Info

Product

Resources

About