巴塔哥尼亚（阿根廷丘布特省）达尼亚纲的一个新Veneroid属（软体动物：双壳纲）

IF 1.2 4区地球科学 Q3 PALEONTOLOGY

Ameghiniana Pub Date : 2021-04-30 DOI:10.5710/AMGH.04.01.2021.3377

M. Alvarez, Claudia J. del Río

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引用次数: 0

摘要

摘要巴塔哥尼亚特有属Titomaya gen.nov.包括来自Chubut省（阿根廷）的Danian Meretrix玉髓（Lefipan组和Salamanca组）和Titomayalongobucca sp.nov.（Salamaca组）。尽管Meretrix和Titomaya有着相同的若虫特征雕塑，但Titomya的区别在于有中等到小的亚三角形、比长壳高的外壳、更窄更短的铰链板、更小的基牙和前牙，以及更深的苍白窦。正如人们长期以来所认为的那样，这个新属排除了Meretrix在巴塔哥尼亚的存在，并增加了巴塔哥尼亚Danian群落的特有分类群列表。

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A New Veneroid Genus (Mollusca: Bivalvia) of the Danian of Patagonia (Chubut Province, Argentina)

Abstract. The endemic Patagonian genus Titomaya gen. nov. is erected to include the Danian Meretrix chalcedonica (Lefipan and Salamanca formations) and Titomaya longobucca sp. nov. (Salamanca Formation) from the Chubut Province (Argentina). Although Meretrix and Titomaya share the same characteristic sculpture of their nymphs, Titomaya is differentiated by having medium to small, subtriangular, higher than long shells, a narrower and shorter hinge plate, smaller cardinal and anterior teeth, and by the development of a deeper pallial sinus. This new genus rules out the presence of Meretrix in Patagonia, as was long believed, and increases the list of endemic taxa that characterize the Danian assemblages of Patagonia.

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来源期刊

Ameghiniana 地学-古生物学

CiteScore

2.50

自引率

10.00%

发文量

期刊介绍： Ameghiniana is a bimonthly journal that publishes original contributions on all disciplines related to paleontology, with a special focus on the paleontology of Gondwana and the biotic history of the southern hemisphere. Published yearly since 1957, it has undoubtedly become the main palaeontological publication from Latin America. Ameghiniana has recently broadened its editorial board, reorganized its production process, and increased to a bimonthly frequency, which resulted in a significant decrease in the turn around time.