Ameghiniana最新文献_第10页

Actualistic Taphonomy in South America. 南美洲的现实Taphonomy。

IF 1 4区地球科学

Ameghiniana Pub Date : 2021-03-18 DOI: 10.5710/1851-8044-58.1.72

Devapriya Chattopadhyay

引用次数: 0

The Earliest Known Titanosaur Sauropod Dinosaur 已知最早的泰坦巨龙蜥脚类恐龙

IF 1 4区地球科学

Ameghiniana Pub Date : 2021-02-28 DOI: 10.5710/AMGH.20.08.2020.3376

P. Gallina, J. Canale, J. Carballido

{"title":"The Earliest Known Titanosaur Sauropod Dinosaur","authors":"P. Gallina, J. Canale, J. Carballido","doi":"10.5710/AMGH.20.08.2020.3376","DOIUrl":"https://doi.org/10.5710/AMGH.20.08.2020.3376","url":null,"abstract":"Abstract. The titanosaur sauropod record of Patagonia, mainly recovered from Upper Cretaceous strata, is probably the richest worldwide. Here we present a new sauropod dinosaur, Ninjatitan zapatai gen. et sp. nov., from the Lower Cretaceous Bajada Colorada Formation (Berriasian–Valanginian) of north Patagonia (Neuquén Province, Argentina), from which postcranial remains are preserved. The anatomical analysis and comparisons performed in this specimen evidence strong affinity with titanosaur sauropods. This assumption is corroborated with the inclusion of the new taxon in an updated phylogenetic data matrix. The cladistic analyses indicate that Ninjatitan could be considered the earliest known titanosaur sauropod. The combination of features such as the presence of procoelous anterior caudal centra, the pneumatized neural arch of anterior caudal vertebrae, and the posterodorsal border of the scapular acromion near the glenoid level supports its titanosaur affinities. The presence of a basal titanosaurian sauropod in the lowermost Cretaceous of Patagonia supports the hypothesis that the group was established in the Southern Hemisphere and reinforces the idea of a Gondwanan origin for Titanosauria. The Bajada Colorada sauropod fauna represents one of the most diverse and unique associations from the lowermost Cretaceous worldwide recorded.","PeriodicalId":50819,"journal":{"name":"Ameghiniana","volume":"58 1","pages":"35 - 51"},"PeriodicalIF":1.0,"publicationDate":"2021-02-28","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"41429267","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"地球科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 16

The Fossil Record of Camelids (Mammalia, Cetartiodactyla) in Tucumán Province, Northwestern Argentina 阿根廷西北部图库曼省骆驼类动物化石记录

IF 1 4区地球科学

Ameghiniana Pub Date : 2021-02-28 DOI: 10.5710/AMGH.27.11.2020.3353

Vanessa Torres-Carro, D. Garcia-Lopez, P. Ortiz

{"title":"The Fossil Record of Camelids (Mammalia, Cetartiodactyla) in Tucumán Province, Northwestern Argentina","authors":"Vanessa Torres-Carro, D. Garcia-Lopez, P. Ortiz","doi":"10.5710/AMGH.27.11.2020.3353","DOIUrl":"https://doi.org/10.5710/AMGH.27.11.2020.3353","url":null,"abstract":"Abstract. The presence of fossil camelids in Tucumán, northwestern Argentina, has been recognized for many years but its relevance has not been fully evaluated so far. Here, we review previous mentions of fossil camelids for this province, present new material, and compare it with fossil and extant specimens of South American camelids, clarifying its taxonomic context and discussing its paleobiogeographic significance. For Tucumán we recognize Vicugna vicugna (Tafí del Valle Formation, late Pleistocene–early Holocene) and Palaeolama sp. (Tucumán Formation, late Pleistocene), mainly based on size and dental features. The current distribution of V. vicugna is restricted to the Central Andes, in the Puna and High Andean environments over 3200 m altitude; there is no mention, neither current nor historical, for Tucumán. Its presence at around 2200 m in the Tafí valley during the Quaternary indicates cooler and drier conditions than those currently established. The observations made in the context of this contribution allow us to establish that the species V. provicugna is a synonym of V. vicugna. In turn, we consider that the validity of the species Palaeolama hoffstetteri, only based on postcranial remains, should be properly evaluated in the future.","PeriodicalId":50819,"journal":{"name":"Ameghiniana","volume":"58 1","pages":"52 - 60"},"PeriodicalIF":1.0,"publicationDate":"2021-02-28","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"41827634","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"地球科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Revision of Botrychiopsis plantiana: A Key Species of the Gzhelian–Cisuralian in Westernmost Gondwana 冈瓦纳大陆最西部葛里阶-西苏里阶的一个关键种植物Botrychiopsis plantiana的修订

IF 1 4区地球科学

Ameghiniana Pub Date : 2021-02-28 DOI: 10.5710/AMGH.28.09.2020.3355

Johana A. Fernández

引用次数: 0

New Insights on Pachybiotherium illuminatum(Mammalia, Marsupialia, Microbiotheriidae) from the Early Miocene of the Pinturas Formation (Santa Cruz Province, Argentina) 阿根廷圣克鲁斯省Pinturas组早中新世光照厚生兽(哺乳目，有袋目，微生物科)的新认识

IF 1 4区地球科学

Ameghiniana Pub Date : 2021-02-28 DOI: 10.5710/AMGH.01.09.2020.3371

Germán Barmak, L. Chornogubsky, L. Gaetano

引用次数: 0

Mites (Acari, Oribatida, Nanhermannidae) from the Eocene of Patagonia: First Southern Hemisphere Fossil Record in Marine Sediments 巴塔哥尼亚始新世的螨类(蜱螨，恙螨科，Nanhermannidae):南半球海洋沉积物的首个化石记录

IF 1 4区地球科学

Ameghiniana Pub Date : 2021-02-28 DOI: 10.5710/AMGH.26.06.2020.3354

D. Fernández, P. Martínez, L. Palazzesi, V. Barreda

引用次数: 0

Advances in South American Micropaleontology. Selected Papers of the 11th Argentine Paleontological Congress 南美洲微词学进展。第十一届阿根廷古生物学大会论文选集

IF 1 4区地球科学

Ameghiniana Pub Date : 2021-01-07 DOI: 10.5710/1851-8044-57.6.625

G. Hassan

引用次数: 0

‘A Very Lazy Deer': Revision of the Cotype Of Nothropus carcaranensis (Mammalia, Xenarthra) “一只非常懒惰的鹿”：carcaranensis Nothropus Cotype的修订（哺乳动物，异种关节动物）

IF 1 4区地球科学

Ameghiniana Pub Date : 2020-12-18 DOI: 10.5710/AMGH.30.07.2020.3368

R. Vezzosi, A. Rotti, Leonardo Dos Santos Avilla

引用次数: 2

The Late Triassic World. Earth in a Time of Transition 晚三叠纪世界地球在一个过渡时期

IF 1 4区地球科学

Ameghiniana Pub Date : 2020-12-18 DOI: 10.5710/1851-8044-57.6.623

A. Mancuso

引用次数: 1

A New Species of Brachyphyllum from the Crato Formation (Lower Cretaceous), Araripe Basin, Brazil 标题巴西Araripe盆地下白垩世克拉托组短叶门一新种

IF 1 4区地球科学

Ameghiniana Pub Date : 2020-12-18 DOI: 10.5710/AMGH.23.06.2020.3333

M. E. P. Batista, L. Kunzmann, A. Sá, A. Saraiva, M. I. Loiola

{"title":"A New Species of Brachyphyllum from the Crato Formation (Lower Cretaceous), Araripe Basin, Brazil","authors":"M. E. P. Batista, L. Kunzmann, A. Sá, A. Saraiva, M. I. Loiola","doi":"10.5710/AMGH.23.06.2020.3333","DOIUrl":"https://doi.org/10.5710/AMGH.23.06.2020.3333","url":null,"abstract":"Abstract. The Araripe Basin, located in the Northeast of Brazil, contains many fossils. Among these, the gymnosperms stand out, especially species of the fossil taxon Brachyphyllum. It encompasses conifer shoots with helically arranged scale-like, adpressed leaves whose length does not exceed the width. This foliage morphotype was widely distributed during the Mesozoic, and species accommodated in this genus can be attributed to different families if their anatomical characters are taken into consideration. In the Araripe basin, specifically in the Crato and Romualdo formations, Brachyphyllum obesum is frequently found and was attributed to the family Araucariaceae based on leaf epidermal and xylem characters. In this work, we describe a new species from the Crato Formation (Lower Cretaceous), Brachyphyllum sattlerae sp. nov., based on the following morphological and anatomical features: sub-main shoots with lateral branches oppositely disposed and almost exclusively decussately arranged leaves; scarious leaf margins; rugose abaxial leaf surfaces; non-papillate epidermal cells; stomata distributed in longitudinal rows except close to the leaf margins and scarce at the leaf base; stomatal openings obliquely oriented; and hypodermis with a sinuous pattern around the substomatal chamber. Some of these features are distinctive of Araucariaceae, which indicates that B. sattlerae sp. nov. also belongs to this family.","PeriodicalId":50819,"journal":{"name":"Ameghiniana","volume":"57 1","pages":"519 - 533"},"PeriodicalIF":1.0,"publicationDate":"2020-12-18","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"46164498","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"地球科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 5