Arid
DOI10.1016/j.palaeo.2012.07.012
Exceptional Late Pliocene microvertebrate diversity in northwestern Argentina reveals a marked small mammal turnover
Ortiz, Pablo E.1,2,3; Garcia Lopez, Daniel A.2,3; Judith Babot, M.4; Pardinas, Ulyses F. J.5; Alonso Muruaga, Pablo J.6; Pablo Jayat, J.7
通讯作者Ortiz, Pablo E.
来源期刊PALAEOGEOGRAPHY PALAEOCLIMATOLOGY PALAEOECOLOGY
ISSN0031-0182
EISSN1872-616X
出版年2012
卷号361页码:21-37
英文摘要

Despite a century of paleontological work in Neogene sequences of northwestern Argentina there is still much to learn about the biotic diversity in this area during Pliocene times. We report a rich microvertebrate assemblage recovered from Late Pliocene deposits of Uquia Formation, Jujuy Province, northernmost Argentina. Taxa represented in the studied sample include members of Bufonidae (Amphibia: Anura), lguanoidea (Reptilia: Squamata), Passeriformes (Ayes), Argyrolagidae, Didelphidae, Caviidae, Ctenomyidae, Octodontidae, and Cricetidae (Mammalia). Taphonomic attributes indicate that the bone concentration was produced by owls. The remains were disposed highly concentrated suggesting that the assemblage would have been generated in a short lapse, indicating a low time-averaging, retaining the main ecological signals of the past living community. The studied assemblage is noteworthy because it encompasses at least five new genera of cricetid rodents, illustrating the oldest record in northwestern Argentina for this diverse family of mammals. In spite of clear taxonomic differences at specific and generic levels, the structure of the assemblage is ecologically comparable to modern small mammal communities in terms of body mass distribution, trophic structure and abundance, with a dominance of cricetids over marsupials and caviomorph rodents. Striking differences in taxonomic composition between the Uquian assemblage and the coeval record from central Argentina indicate biogeographical distinctions since the Late Pliocene. The new Uquian cricetids show that the early divergence times for phyllotine genera proposed by several authors cannot be supported. The dominance of phyllotines in the assemblage as well as the record of Microcavia and an octodontid allow inferring arid or semiarid paleoenvironment conditions, in a more or less open habitat. The studied assemblage reflects a noteworthy faunal turnover, which implies the establishment of cricetid rodents as the dominant group in the small mammal communities. This faunal change can be associated to increasing aridity during Late Pliocene worldwide. (C) 2012 Elsevier BM. All rights reserved.


英文关键词Taphonomy Uquia Formation Sigmodontinae Great American Biotic Interchange Paleoenvironments Faunal turnover
类型Article
语种英语
国家Argentina
收录类别SCI-E
WOS记录号WOS:000310824800003
WOS关键词AMERICAN BIOTIC INTERCHANGE ; PLEISTOCENE-HOLOCENE BOUNDARY ; PAMPEAN REGION ARGENTINA ; MIOCENE FAUNAL TURNOVER ; BUENOS-AIRES PROVINCE ; TAFI VALLEY TUCUMAN ; SOUTH-AMERICA ; PALEOENVIRONMENTAL RECONSTRUCTION ; CRICETIDAE RODENTIA ; CATAMARCA PROVINCE
WOS类目Geography, Physical ; Geosciences, Multidisciplinary ; Paleontology
WOS研究方向Physical Geography ; Geology ; Paleontology
资源类型期刊论文
条目标识符http://119.78.100.177/qdio/handle/2XILL650/174318
作者单位1.Consejo Nacl Invest Cient & Tecnol CONICET, Inst Super Correlac Geol INSUGEO, RA-4000 San Miguel De Tucuman, Tucuman, Argentina;
2.Inst Miguel Lillo, RA-4000 San Miguel De Tucuman, Tucuman, Argentina;
3.Fac Ciencias Nat, Catedra Paleontol, RA-4000 San Miguel De Tucuman, Tucuman, Argentina;
4.Fdn Miguel Lillo, RA-4000 San Miguel De Tucuman, Tucuman, Argentina;
5.Ctr Nacl Patagon, RA-9120 Puerto Madryn, Chubut, Argentina;
6.Univ Buenos Aires, Dept Ciencias Geol, Buenos Aires, DF, Argentina;
7.Univ Nacl Tucuman, Lab Invest Ecol Yungas IER LIEY, Inst Ecol Reg, RA-4107 San Miguel De Tucuman, Argentina
推荐引用方式
GB/T 7714
Ortiz, Pablo E.,Garcia Lopez, Daniel A.,Judith Babot, M.,et al. Exceptional Late Pliocene microvertebrate diversity in northwestern Argentina reveals a marked small mammal turnover[J],2012,361:21-37.
APA Ortiz, Pablo E.,Garcia Lopez, Daniel A.,Judith Babot, M.,Pardinas, Ulyses F. J.,Alonso Muruaga, Pablo J.,&Pablo Jayat, J..(2012).Exceptional Late Pliocene microvertebrate diversity in northwestern Argentina reveals a marked small mammal turnover.PALAEOGEOGRAPHY PALAEOCLIMATOLOGY PALAEOECOLOGY,361,21-37.
MLA Ortiz, Pablo E.,et al."Exceptional Late Pliocene microvertebrate diversity in northwestern Argentina reveals a marked small mammal turnover".PALAEOGEOGRAPHY PALAEOCLIMATOLOGY PALAEOECOLOGY 361(2012):21-37.
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