INVESTIGADORES
MIÑO BOILINI Angel Ramon
artículos
Título:
New records of Neogene Xenarthra (Mammalia) from eastern Puna (Argentina): diversity and biochronology
Autor/es:
QUIÑONES, S.I; MIÑO BOILINI, A. R.; ZURITA, A.E.; CONTRERAS, S.; LUNA, C.; CANDELA, A.M.; CAMACHO, M.; ERCOLI,M; SOLÍS, N.; BRANDONI, D.
Revista:
JOURNAL OF PALEONTOLOGY
Editorial:
PALEONTOLOGICAL SOC INC
Referencias:
Lugar: Lawrence; Año: 2019 vol. 93 p. 1258 - 1275
ISSN:
0022-3360
Resumen:
XenarthraisanendemicSouthAmericanlineageofmammals,probablythesistercladeoftheotherplacental mammals.TheoldestrecordsofXenarthraarefromthelatestPaleocene,althoughitscurrentdiversityismuchlowerthan that recorded in some intervals of the Cenozoic Era. A new Neogene Xenarthra (Pilosa and Cingulata) assemblage from two localities of the Argentine Eastern Puna (Calahoyo and Casira) is described. The newly recorded taxa?Cingulata, Dasypodidae, Eutatini: Stenotatus sp. indet. and Eutatini indet., Euphractini: Macrochorobates scalabrinii (Moreno and Mercerat, 1891), and Tardigrada, Mylodontinae: cf. Simomylodon sp. indet. and Simomylodon cf. S. uccasamamensis Saint-André et al., 2010?and those already published from Calahoyo?Cingulata: Macrochorobates chapadmalensis (Ameghino, 1908), Eosclerocalyptus sp. indet., and Tardigrada, Megatheriidae: Pyramiodontherium bergi (Moreno and Mercerat, 1891)?suggest a middle?late Miocene age for the fossil-bearing levels. In Calahoyo, the presence of Stenotatus sp. indet., in addition to some rodents currently under study in the lower levels, suggest a closer similarity with the palaeofauna of Cerdas (southern Bolivia), probably involving the last part of the Miocene Climatic Optimum. The Xenarthra recorded in the middle and upper levels of Calahoyo and Casira suggest a late Miocene?Pliocene age. AcomparativeanalysisbetweenCalahoyoandCasirahighlightstheabsenceofCingulatainthelatterandahighdiversity intheformer.Thissituationprobablyindicatesdifferentpaleoenvironmentalconditions.Finally,wepresentthe firstcertain record of the genus Simomylodon Saint-André et al., 2010 in Argentina, which includesthe oldest record of dermal ossicles for sloths in South America.
