始新世(杜希斯世和最早的乍得世)雷龙兽(雷龙兽科),curryi Protitanops和cf. Parvicornus occidentalis,产于西德克萨斯和墨西哥

IF 2 4区 地球科学 Q1 Earth and Planetary Sciences Palaeontologia Electronica Pub Date : 2021-01-01 DOI:10.26879/944
Matthew C. Mihlbachler, D. Prothero
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引用次数: 0

摘要

大型角兽(Brontotheriidae)在德克萨斯州西部大弯地区和墨西哥附近的杜切斯纪和早乍得纪哺乳动物群中有大量的代表。迄今为止,这些材料的大部分都没有得到充分的研究,但已经得到了鉴定和描述。1948年,Menodus bakeri Stovall发现了该地区第一个命名的野马,它被发现是一种普通的氘。大部分化石材料可参考Protitanops curryi Stock, 1936。P. curryi,以前只从南加州提图斯山谷地层的一个标本中被发现,现在在德克萨斯州的杜切斯尼和查德罗尼陆地哺乳动物时代都被发现。它出现在德克萨斯州大本德国家公园钱伯斯凝灰岩组下部的杜彻斯尼晚期Porvenir地方动物群中,以及早乍得世钱伯斯凝灰岩组上部和奇索斯组下部的小埃及地方动物群中。来自墨西哥Prietos组的早期Chadronian Rancho Gaitan本地动物群的单个标本也被确定为P. curryi。在美国德克萨斯州和墨西哥发现的大量原泰坦虫材料拓宽了该物种的生物地层和地理范围,并对其形态和系统发育位置提供了更广泛的认识。Duchesneodus uintensis (Peterson, 1931)先前在Chambers凝灰岩下部的Blue Cliff地平线上发现了诊断材料。Duchesneodus先前在魔鬼墓地地层的早期Duchesnean Skyline channel中被发现,但这种材料更适合于参考Parvicornus occidentalis Mihlbachler和demsamuise, 2009。因此,D. uintensis仅限于德克萨斯州的杜切斯尼晚期。马修·c·米巴赫勒。纽约理工学院骨科医学院解剖学系,美国纽约老韦斯特伯里11658mmihlbac@nyit.edu唐纳德·r·普罗西罗,古脊椎动物部,洛杉矶县自然历史博物馆,博览会大道900号。,美国加州洛杉矶90007donaldprothero@att.net米巴赫勒和普罗西罗:得克萨斯雷龙科2
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Eocene (Duchesnean and earliest Chadronian) brontotheres (Brontotheriidae), Protitanops curryi and cf. Parvicornus occidentalis, from west Texas and Mexico
Large horned brontotheres (Brontotheriidae) are abundantly represented in Duchesnean and early Chadronian mammal faunas from the Big Bend Area of West Texas and nearby Mexico. The majority of this material, which until now has never been fully examined, is identified and described. The first brontothere to be named from this region, Menodus bakeri Stovall, 1948, is found to be a nomen dubium. The majority of the fossil material is referrable to Protitanops curryi Stock, 1936. P. curryi, previously only known from a single specimen from the Titus Valley Formation of Southern California, is now recognized in both the Duchesnean and Chadronian land mammal ages of Texas. It occurs in the late Duchesnean Porvenir Local Fauna from the lower part of the Chambers Tuff Formation and from the early Chadronian Little Egypt local fauna from the upper part of the Chambers Tuff Formation and the lower Chisos Formation in the Big Bend National Park Texas. A single specimen from the early Chadronian Rancho Gaitan local fauna of the Prietos Formation of Mexico is also identified as P. curryi. The extensive Protitanops curryi material from Texas and Mexico broadens the biostratigraphic and geographic ranges of this species and provides a more extensive understanding of its morphology and phylogenetic position. Duchesneodus uintensis (Peterson, 1931) has been previously identified with diagnostic material in the Blue Cliff horizon of the lower Chambers Tuff. Duchesneodus was previously identified in the early Duchesnean Skyline Channels of the Devil’s Graveyard Formation, but this material is better identified as cf. Parvicornus occidentalis Mihlbachler and Deméré, 2009. D. uintensis is therefore restricted to the late Duchesnean in Texas. Matthew C. Mihlbachler. Department of Anatomy, New York Institute of Technology College of Osteopathic Medicine, Old Westbury, New York 11658, USA. mmihlbac@nyit.edu Donald R. Prothero, Department of Vertebrate Paleontology, Natural History Museum of L.A. County, 900 Exposition Blvd., Los Angeles, California 90007, USA. donaldprothero@att.net MIHLBACHLER & PROTHERO: TEXAS BRONTOTHERIIDAE 2
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来源期刊
Palaeontologia Electronica
Palaeontologia Electronica 地学-古生物学
CiteScore
3.60
自引率
0.00%
发文量
20
审稿时长
>12 weeks
期刊介绍: Founded in 1997, Palaeontologia Electronica (PE) is the longest running open-access, peer-reviewed electronic journal and covers all aspects of palaeontology. PE uses an external double-blind peer review system for all manuscripts. Copyright of scientific papers is held by one of the three sponsoring professional societies at the author''s choice. Reviews, commentaries, and other material is placed in the public domain. PE papers comply with regulations for taxonomic nomenclature established in the International Code of Zoological Nomenclature and the International Code of Nomenclature for Algae, Fungi, and Plants.
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