A new genus of megalonychid ground sloth (Mammalia, Xenarthra) from the late Pleistocene of Quintana Roo, Mexico

A new Mexican state record is provided for Holoaerenica apleta Galileo & Martins, 1987 and a new Honduran record is provided for Antodice sexnotata Franz, 1959 (both Aerenicini). A new Mexican state record is provided for Ptericoptus caudalis Bates, 1880 (Apomecynini). A new record for Panama is provided for Novantinoe hovorei Santos-Silva, 2007 (Disteniidae, Disteniinae). Vandenbergheius celaquensis, gen. nov., sp. nov. (Apomecynini) is described from Honduras; Adetus croton (Apomecynini) is described from the USA (Texas), Mexico (Sonora, Jalisco, Chiapas, Michoacán, Quintana Roo, Tamaulipas, Yucatán, Nuevo León), and Honduras; and Estoloides sinaloana (Desmiphorini) is described from Mexico (Sinaloa).

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Novel application of 3D documentation techniques at a submerged Late Pleistocene cave site in Quintana Roo, Mexico

2015 Digital Heritage ◽

10.1109/digitalheritage.2015.7413868 ◽

2015 ◽

Cited By ~ 1

Author(s):

Dominique Rissolo ◽

Alberto Nava Blank ◽

Vid Petrovic ◽

Roberto Chavez Arce ◽

Corey Jaskolski ◽

...

Keyword(s):

Late Pleistocene ◽

Quintana Roo ◽

3D Documentation

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OMALONOMUS RELICTUS, AN UNUSUAL NEW GENUS AND NEW SPECIES (COLEOPTERA: STAPHYLINIDAE, OMALHNAE) OF BLIND ROVE BEETLE; A PREGLACIAL (TERTIARY?) RELICT IN THE CYPRESS HILLS, ALBERTA–SASKATCHEWAN, CANADA

The Canadian Entomologist ◽

10.4039/ent122949-9 ◽

1990 ◽

Vol 122 (5) ◽

pp. 949-961 ◽

Cited By ~ 1

Author(s):

J.M. Campbell ◽

S.B. Peck

Keyword(s):

New Species ◽

Late Pleistocene ◽

North American ◽

New Genus ◽

Rove Beetle ◽

Structural Peculiarities ◽

Subterranean Habitat

AbstractOmalonomus relictus, a highly modified new genus and new species of soil-dwelling rove beetle, is described from the Cypress Hills of Alberta and Saskatchewan. The structural peculiarities associated with its subterranean habitat are discussed and illustrated. Moore and Legner’s (1974) key to the genera of North American Omaliinae is modified to assist in the identification of adults of the genus. The occurrence of this blind, slightly pigmented, flightless beetle in the soil of the Cypress Hills supports the hypothesis that at least part of this area was unglaciated and served as a refugium during late Pleistocene glacial advances.

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New evidence for Late Pleistocene human exploitation of Jefferson's Ground Sloth (Megalonyx jeffersonii) from northern Ohio, USA

World Archaeology ◽

10.1080/00438243.2012.647576 ◽

2012 ◽

Vol 44 (1) ◽

pp. 75-101 ◽

Cited By ~ 16

Author(s):

Brian G. Redmond ◽

H Gregory McDonald ◽

Haskel J. Greenfield ◽

Matthew L. Burr

Keyword(s):

Late Pleistocene ◽

Ground Sloth ◽

New Evidence ◽

Northern Ohio

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Skeletal pathologies in the giant ground sloth Eremotherium laurillardi (Xenarthra, Folivora): New cases from the Late Pleistocene of Brazil

Journal of South American Earth Sciences ◽

10.1016/j.jsames.2021.103377 ◽

2021 ◽

pp. 103377

Author(s):

Fernando Henrique de Souza Barbosa ◽

Hermínio Ismael de Araújo-Júnior

Keyword(s):

Late Pleistocene ◽

Ground Sloth

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Unexpected inhibitory cascade in the molariforms of sloths (Folivora, Xenarthra): a case study in xenarthrans honouring Gerhard Storch’s open-mindedness

Fossil Imprint ◽

10.37520/fi.2020.002 ◽

2020 ◽

Vol 76 (1) ◽

pp. 1-16

Author(s):

Luciano Varela ◽

P. Sebastián Tambusso ◽

Richard A. Fariña

Keyword(s):

Late Pleistocene ◽

Evolutionary History ◽

Developmental Model ◽

Dental Formula ◽

Evolutionary Trends ◽

Signalling Molecules ◽

Morphological Adaptations ◽

Ground Sloth

The inhibitory cascade (IC) represents a developmental model that explains the evolution of molar relative sizes, originally described in rodents but later validated in several mammalian groups. The IC comprises signalling molecules produced by the first molar buds that inhibit the development of subsequent molars and molecules from surrounding tissues that have opposite effects. Sloths, as xenarthrans, present many peculiarities in their dentition, like tooth and enamel loss, homodonty, and changes in the typically mammalian dental formula. Here, we test the existence of an IC and explore the evolution of the lower dentition in sloths. We studied the variability of molariform proportions in 20 specimens of the Late Pleistocene ground sloth Lestodon armatus. We also analysed molariforms proportions in 53 sloth genera to explore evolutionary trends. Our results show that the lower dentition of most sloths complies with the IC model, despite the difficulties of assessing dental homologies with other mammals. Furthermore, we tested the existence of different patterns among families, obtaining support for models taking mylodontids and orophodontids separately from the rest of sloths. Also, members of Mylodontidae show a unique IC pattern, with a slope considerably higher than 2 and an mf1 ≤ mf2 << mf3 configuration. This pattern could be related to the morphological adaptations to grazing showed by mylodontids during most of their evolutionary history.

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