The Interatheriinae notoungulates from the middle Miocene Collón Curá Formation in Argentina

Vera, Bárbara; Reguero, Marcelo Alfredo; Ruiz, Laureano Raúl González

doi:10.4202/app.00373.2017

Cited by 17 publications

(22 citation statements)

References 0 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…The phylogenetic analysis of the Interatheriidae presented herein (like that of Fernández et al, 2021b) shows improved resolutions compared to earlier work (e.g., Cifelli, 1993;Hitz et al, 2000Hitz et al, , 2006Reguero & Prevosti, 2010;Billet, 2011;Billet & Muizon, 2013;Billet et al, 2015;García-López & Babot, 2015;Vera, 2016Vera, , 2017Vera et al, 2017Vera et al, , 2018, and represents the most complete analysis in terms of interathere genera. Interatheriidae are recovered as a clade (Fig.…”

Section: Phylogenetic Analysismentioning

confidence: 77%

“…However, Croft & Anaya (2020) also indicated that Interatherium is also closely related to one species of Protypotherium. Further, other authors resolve Interatherium as more closely related to Protypotherium plus Miocochilius (e.g., Reguero et al, 2003;Reguero & Prevosti, 2010;Billet, 2011;Billet & Muizon, 2013;García-López & Babot, 2015, Fernández et al, 2019b, to Plagiarthrus (e.g., Hitz et al, 2000), or even as part of a polytomy (e.g., Vera et al, 2017Vera et al, , 2018 that included a clade constituted by Mesotheriidae+Archaeohyracidae and Hegetotheriidae, triggering Vera (2017) to question the monophyly of the Interatheriidae and Interatheriinae. The latter agrees with Vera (2016) and Vera et al (2018), who must include Mesotheriidae+Hegetotheriidae and Olfieldthomasiidae, respectively, within Interatheriidae in order to consider this family monophyletic.…”

Section: Phylogenetic Analysismentioning

confidence: 99%

“…to Plagiarthrus (e.g., Hitz et al, 2000), or even as part of a polytomy (e.g., Vera et al, 2017Vera et al, , 2018 While the precise phylogenetic relationships of the diverse interatheres are not agreed upon, there is ample evidence that Interatherium represents a monophyletic group.…”

Section: (2021b) This Close Relationship Between Interatherium Andmentioning

confidence: 99%

See 2 more Smart Citations

Systematic Revision of Interatherium and Icochilus (Interatheriidae, Notoungulata) from the Santa Cruz Formation (Early To Middle Miocene), Santa Cruz Province, Argentina

2023

View full text Add to dashboard Cite

Interatheriidae (late Paleocene-Late Miocene) is one of the most morphologically derived families within Order Notoungulata, and the most taxonomic diverse and abundant clade of extinct South American Native Ungulates. Most of the interatheriids described during late 19 th century were erected from specimens collected from the prolific Santa Cruz Formation (Santacrucian SALMA; Burdigalian-early Langhian), Santa Cruz Province (Argentina). Interatherium, the type genus of the family, and Icochilus, a closely related genus, were last revised more than a century ago and most of the species were considered Typotheria incertae sedis. This contribution provides the taxonomic revision of these genera, made within the framework of an exhaustive unpublished systematic revision of Interatheriinae. We propose several synonyms, including the synonymy between both genera, conclude that Interatherium is comprised of I. rodens and I. extensus, consider Interatherium supernum as nomen nudum according to its first description in 1887, and Interatherium brevifrons and Icochilus curtus as species inquirenda. This taxonomic scheme is supported by a phylogenetic analysis, in which Interatherium is recovered as a monophyletic genus and as the sister taxon of the clade Neoicochilus plus Cochilius. In a biostratigraphic context, it is not possible to subdivide the Santa Cruz Formation based on the presence/absence of any species of Interatherium, due to their wide geographic and temporal distribution. Finally, the localities from the Atlantic coast (east) and Río Santa Cruz (central) are similar in their content concerning Interatherium, but both differ from that of the western area, which lacks any evidence of this genus.

show abstract

Section: Phylogenetic Analysismentioning

confidence: 77%

Section: Phylogenetic Analysismentioning

confidence: 99%

See 1 more Smart Citation

Systematic Revision of Interatherium and Icochilus (Interatheriidae, Notoungulata) from the Santa Cruz Formation (Early To Middle Miocene), Santa Cruz Province, Argentina

2023

View full text Add to dashboard Cite

show abstract

“…In contrast, the occurrences of notostylopids (typotheres) are restricted to Paleogene sequences in Argentina, Brazil, and Chile (McKenna and Bell 1997;Billet 2011). The absence of cementum rules out any relationship with the Interatheriinae (Vera et al 2017), while the crown lacks the distinctive flat labial face present in hegetotheriids (Cerdeño and Reguero 2015). The anteroposterior elongation of the second lobe rules out any relationship to basal hegetotheriids, while the m3 has a relatively deep labial sulcus on m3 not present in basal Interatheriinae such as †Santiagorothia and †Proargyrohyrax (Cerdeño and Reguero 2015).…”

Section: Material: a Metacarpal (Amu-curs-742) And A Distal Epiphysis Of A Metacarpal (Amu-curs-1189)mentioning

confidence: 99%

A Pliocene–Pleistocene continental biota from Venezuela

Carrillo-Briceño

Sánchez²,

Scheyer

et al. 2021

Swiss J Palaeontol

View full text Add to dashboard Cite

The Pliocene–Pleistocene transition in the Neotropics is poorly understood despite the major climatic changes that occurred at the onset of the Quaternary. The San Gregorio Formation, the younger unit of the Urumaco Sequence, preserves a fauna that documents this critical transition. We report stingrays, freshwater bony fishes, amphibians, crocodiles, lizards, snakes, aquatic and terrestrial turtles, and mammals. A total of 49 taxa are reported from the Vergel Member (late Pliocene) and nine taxa from the Cocuiza Member (Early Pleistocene), with 28 and 18 taxa reported for the first time in the Urumaco sequence and Venezuela, respectively. Our findings include the first fossil record of the freshwater fishes Megaleporinus, Schizodon, Amblydoras, Scorpiodoras, and the pipesnake Anilius scytale, all from Pliocene strata. The late Pliocene and Early Pleistocene ages proposed here for the Vergel and Cocuiza members, respectively, are supported by their stratigraphic position, palynology, nannoplankton, and 86Sr/88Sr dating. Mammals from the Vergel Member are associated with the first major pulse of the Great American Biotic Interchange. In contrast to the dry conditions prevailing today, the San Gregorio Formation documents mixed open grassland/forest areas surrounding permanent freshwater systems, following the isolation of the northern South American basin from western Amazonia. These findings support the hypothesis that range contraction of many taxa to their current distribution in northern South America occurred rapidly during at least the last 1.5 million years.

show abstract

“…This is a broadly represented group in the Cenozoic of South America (Bond, 1986; Hitz et al, 2000), known mostly by the representatives of early to middle Miocene (Croft et al, 2009), being recorded from the Tinguirirican SALMA (early Oligocene) to the Huayquerian SALMA (late Miocene). The present study focuses on the comparative study of the deciduous and permanent dentition of the genera Interatherium Ameghino, 1887 (Ameghino, 1887a) from the Santacrucian SALMA and Protypotherium Ameghino, 1885, which has an unusually long stratigraphic range that extends from the Deseadan (late Oligocene) to the Huayquerian SALMA (late Miocene) (Fernández et al, 2019b) and whose monophyly has been recently questioned (e.g., Vera et al, 2017; Croft and Anaya, 2020). The obtained results allow the differentiation of several ontogenetic stages for both genera and the establishment of the pattern of eruption and replacement of the deciduous cheek teeth and the eruption sequence of molars.…”

Section: Introductionmentioning

confidence: 99%

Deciduous dentition and dental eruption sequence in Interatheriinae (Notoungulata, Interatheriidae): implications in the systematics of the group

2021

View full text Add to dashboard Cite

Studies focused on deciduous dentition, ontogenetic series, and tooth eruption and replacement patterns in fossil mammals have lately increased due to the recognized taxonomic and phylogenetic weight of these aspects. A study of the deciduous and permanent dentition of Interatherium and Protypotherium (Interatheriinae) is presented, based mainly on unpublished materials. Deciduous cheek teeth are brachydont and placed covering the apex of the respective permanent tooth; in addition, some morphological and metrical differences are observed along the crown height. Five dental ontogenetic stages are distinguished among the juvenile specimens on the basis of the degree of wear, the replacement of the deciduous premolars, and the eruption of the molars. The crown height and the wear degree of different Interatheriinae taxa show: (1) eruption pattern of molars in an anterior–posterior direction (M/m1 to M/m3); (2) pattern of replacement of deciduous premolars and eruption of permanent premolars in a posterior–anterior direction (dP/dp4 to dP/dp2 and P/p4 to P/p2); and (3) eruption of M/m3 before the replacement of dP/dp4. Results allow evaluating the diagnostic dental characteristics used to describe some interatheriines, as well as reinterpreting some taxonomic assumptions: the holotype of Protypotherium diversidens Ameghino, 1891 is recognized as a juvenile of another species of the genus, and the species is not validated, considering it as Protypotherium sp.; the holotype of Eudiastatus lingulatus Ameghino, 1891 falls in the variability of Protypotherium, becoming P. lingulatus new combination, tentatively maintaining the species and implying the synonymy between Eudiastatus and Protypotherium; and the holotype of Eopachyrucos ranchoverdensis Reguero, Ubilla, and Perea, 2003 is reinterpreted as bearing deciduous premolars.

show abstract

The Interatheriinae notoungulates from the middle Miocene Collón Curá Formation in Argentina

Abstract: The Interatheriinae (Notoungulata, Interatheriidae)

Cited by 17 publications

References 0 publications

Systematic Revision of Interatherium and Icochilus (Interatheriidae, Notoungulata) from the Santa Cruz Formation (Early To Middle Miocene), Santa Cruz Province, Argentina

Systematic Revision of Interatherium and Icochilus (Interatheriidae, Notoungulata) from the Santa Cruz Formation (Early To Middle Miocene), Santa Cruz Province, Argentina

A Pliocene–Pleistocene continental biota from Venezuela

Deciduous dentition and dental eruption sequence in Interatheriinae (Notoungulata, Interatheriidae): implications in the systematics of the group

Contact Info

Product

Resources

About