A small penguin cranium (Aves, Spheniscidae) from the Late Miocene of Bahía Inglesa Formation, Atacama Desert, Northern Chile

IF 1.2 4区地球科学 Q3 PALEONTOLOGY

Comptes Rendus Palevol Pub Date : 2023-04-27 DOI:10.5852/cr-palevol2023v22a13

C. A. Hospitaleche, S. Soto-Acuña

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Abstract

A new cranium of penguin from the Late Miocene of the Bahía Inglesa Formation (Northern Chile) is described here. Specimen SGO.PV.22245 exhibits a unique combination of characters that suggests it belongs to a new species of either Eudypula Bonaparte, 1856, Spheniscus Brisson, 1760, or more probably to a more basal taxon related to them. The specimen is notably smaller than the fossil species of Spheniscus and more similar in size to the extant Spheniscus. The fossa glandulae nasalis narrows caudally, the crista nuchalis transversa and the crista temporalis are expanded like short wings, and a short crista nuchalis sagittalis connects with the rounded and cranially projected eminentia cerebellaris. The fossa temporalis is subtriangular and deeper caudally and the cranial roof is widely expanded. All these features approach the condition to some species of Spheniscus and Eudyptula. However, because of the incompleteness of the material and the fact that it cannot be compared with some fossil species of Spheniscus only known through postcranial material, we are not able to provide a more accurate assignment.

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智利北部阿塔卡马沙漠Bahía Inglesa组中新世晚期的一个小企鹅头盖骨(鸟，企鹅科)

本文描述了一种来自Bahía Inglesa组(智利北部)晚中新世的企鹅头盖骨。标本SGO.PV。22245显示出独特的特征组合，表明它属于Eudypula Bonaparte(1856年)和Spheniscus Brisson(1760年)的一个新种，或者更可能属于与它们相关的一个更基础的分类单元。该标本明显小于Spheniscus的化石物种，在尺寸上与现存的Spheniscus更相似。鼻腺窝尾部变窄，颈横突和颞突像短翅膀一样展开，短的矢状颈突与圆形和颅骨突出的小脑突相连。颞窝呈近三角形，在尾部较深，颅顶广泛扩张。所有这些特征都接近于某些种类蝶属和尤蒂属的状况。然而，由于材料的不完整性以及它无法与一些仅通过颅后材料已知的蝶骨化石物种进行比较，我们无法提供更准确的分配。

本文章由计算机程序翻译，如有差异，请以英文原文为准。

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来源期刊

Comptes Rendus Palevol 地学-古生物学

CiteScore

2.10

自引率

0.00%

发文量

审稿时长

17.6 weeks

期刊介绍： Comptes Rendus Palevol is a fully electronic and peer-reviewed journal, with a continuous publication stream, devoted to palaeontology, prehistory and evolutionary sciences. It publishes original research results, in French or English, in the following domains: systematic and human palaeontology, prehistory, evolutionary biology and macroevolution, and history of sciences. Thematic issues may also be published under the responsibility of a guest editor. All articles published in Comptes Rendus Palevol are compliant with the different nomenclatural codes. A copyright assignment will be signed by the authors before publication.