A new giant megatheriine ground sloth (Mammalia: Xenarthra: Megatheriidae) from the late Blancan to early Irvingtonian of Florida

Iuliis, Gerardo De; Cartelle, Cástor

doi:10.1111/j.1096-3642.1999.tb01383.x

Cited by 39 publications

(11 citation statements)

References 10 publications

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“…Among the best known representatives of the tardigrade clades in North America, we may note Paramylodon (Mylodontidae), Megalonyx (Megalonychidae), Eremotherium (Megatheriidae), and Nothrotheriops (Nothrotheriidae). The Megatheriinae Eremotherium eomigrans, about equal in size to its more widespread relative E. laurillardi (also present in North America), was described from Florida by De Iuliis and Cartelle (1999). It is characterized by a plesiomorphic pentadactyl manus and two distinct carpal arrangements, a striking example of the considerable plasticity of ground sloths.…”

Section: Discovery Of "Peculiar" Sloths and New Prospecting Areasmentioning

confidence: 97%

“…It is characterized by a plesiomorphic pentadactyl manus and two distinct carpal arrangements, a striking example of the considerable plasticity of ground sloths. The taxon is important not only because it illustrates the plesiomorphic megatheriine condition of the manus, but also because it is the first member of Megatheriinae to have migrated to North America during the Great American Biotic Interchange (De Iuliis and Cartelle 1999).…”

Section: Discovery Of "Peculiar" Sloths and New Prospecting Areasmentioning

confidence: 99%

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Recent Advances on Variability, Morpho-Functional Adaptations, Dental Terminology, and Evolution of Sloths

et al. 2012

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The occasion of the Xenarthra Symposium during the ICVM 9 meeting allowed us to reflect on the considerable advances in the knowledge of sloths made by the "Xcommunity" over the past two decades, particularly in such aspects as locomotion, mastication, diet, dental terminology, intraspecific variation, sexual dimorphism, and phylogenetic relationships. These advancements have largely been made possible by the application of cladistic methodology (including DNA analyses) and the discovery of peculiar forms such as Diabolotherium, Thalassocnus, and Pseudoglyptodon in traditionally neglected areas such as the Chilean Andes and the Peruvian Pacific desert coast. Modern tree sloths exhibit an upside-down posture and suspensory locomotion, but the habits of fossil sloths are considerably more diverse and include locomotory modes such as inferred bipedality, quadrupedality, arboreality or semiarboreality, climbing, and an aquatic or semi-aquatic lifestyle in saltwater. Modern tree sloths are generalist browsers, but fossil sloths had browsing, grazing, or mixed feeding dietary habits. Discovery of two important sloth faunas in Brazil (Jacobina) and southern North America (Daytona Beach and Rancho La Brea) have permitted evaluation of the ontogenetic variation in Eremotherium laurillardi and the existence of possible sexual dimorphism in this sloth and in Paramylodon harlani. A new dental terminology applicable to a majority of clades has been developed, facilitating comparisons among taxa. An analysis wherein functional traits were plotted onto a phylogeny of sloths was used to determine patterns of evolutionary change across the clade. These analyses suggest that megatherioid sloths were primitively semiarboreal or possessed climbing adaptations, a feature retained in some members of the family Megalonychidae. Pedolateral stance in the hindfoot is shown to be convergently acquired in Mylodontidae and Megatheria (Nothrotheriidae + Megatheriidae), this feature serving as a synapomorphy of the latter clade. Digging adaptations can only be securely ascribed to scelidotheriine and mylodontine sloths, and the latter are also the only group of grazing sloths, the remainder being general browsers.

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Section: Discovery Of "Peculiar" Sloths and New Prospecting Areasmentioning

confidence: 97%

Section: Discovery Of "Peculiar" Sloths and New Prospecting Areasmentioning

confidence: 99%

Recent Advances on Variability, Morpho-Functional Adaptations, Dental Terminology, and Evolution of Sloths

et al. 2012

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“…Indeed, during the last 50 years, numerous species have been named for the Pleistocene and early Holocene (at least 14; Cartelle and De Iuliis, 1995), all synonymous with the single species Eremotherium laurillardi (Lund, 1842). Two other species are still considered valid within the genus, Eremotherium sefvei (De Iuliis and Saint André, 1997) and Eremotherium eomigrans (De Iuliis and Cartelle, 1999), both slightly older in age (late Pliocene-earliest Pleistocene).…”

Section: Introductionmentioning

confidence: 97%

New remains of Eremotherium laurillardi (Lund, 1842) (Megatheriidae, Xenarthra) from the coastal region of Ecuador

Tito

2008

Journal of South American Earth Sciences

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“…Eremotherium has three species with morphological differences, timing and distribution: E. eomigrans, found in Late Pliocene-Early Pleistocene of Florida, USA; E. sefvei, restricted to the Pleistocene of Bolivia, and E. laurillardi, from the Late Pleistocene from Brazil to USA, being this the most commonly found species in the North and South American continents (Cartelle and De Iuliis, 1995;De Iuliis and St-André, 1997;De Iuliis and Cartelle, 1999).…”

Section: Introductionmentioning

confidence: 99%

A new specimen of Eremotherium laurillardi (Xenarthra, Megatheriidae) from the Late Pleistocene of Chiapas, and comments about the distribution of the species in Mexico

Carbot-Chanona¹,

Pérez²,

Coutiño-José³

2022

BSGM

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Eremotherium laurillardi was a common giant ground sloth in the Late Pleistocene of the Americas. A right femur referable to this species was recovered from fluvial sediments in Constitución 27 colony, Socoltenango municipality, in the southern State of Chiapas, Mexico. The femur shows the morphological characteristics of E. laurillardi, such as: large size; rectangular shape, it is dorsoventrally flattened; lateral and medial margin rectilinear and parallel, and patellar trochlea transversely elongated with the medial margin in the sagittal plane of the femur. The record from Constitución 27 town, adds a new locality for E. laurillardi in Mexico, which adds to the previously known seven localities with remains of this species in Chiapas. In Mexico, E. laurillardi is present in 31 localities distributed in 13 states, mainly in the central and southern portion of Mexico, with an altitudinal range between 0-200 up to 2000-2500 meters above sea level, indicating a mostly tropical distribution of this species.

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A new giant megatheriine ground sloth (Mammalia: Xenarthra: Megatheriidae) from the late Blancan to early Irvingtonian of Florida

Cited by 39 publications

References 10 publications

Recent Advances on Variability, Morpho-Functional Adaptations, Dental Terminology, and Evolution of Sloths

Recent Advances on Variability, Morpho-Functional Adaptations, Dental Terminology, and Evolution of Sloths

New remains of Eremotherium laurillardi (Lund, 1842) (Megatheriidae, Xenarthra) from the coastal region of Ecuador

A new specimen of Eremotherium laurillardi (Xenarthra, Megatheriidae) from the Late Pleistocene of Chiapas, and comments about the distribution of the species in Mexico

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