The first record of Ceratophrys (Anura: Ceratophryidae) for the Upper Miocene of northwest Argentina and its paleoecological implications

IF 1.7 4区地球科学 Q3 GEOSCIENCES, MULTIDISCIPLINARY

Journal of South American Earth Sciences Pub Date : 2025-06-03 DOI:10.1016/j.jsames.2025.105618

Gonzalo G. Bravo , Ana S. Duport-Bru , Pablo J. Alonso-Muruaga , Matias A. Armella , Daniel A. García-López

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Abstract

Ceratophryidae is a clade of hyperossified anurans characteristic of the South American Neotropical fauna, with a well-documented fossil record in the Neogene of central Argentina, but scarcely represented in northwestern Argentina (NWA). This study describes two fossil specimens (IBIGEO-P 99 and IBIGEO-P 128) assigned to Ceratophryidae, recovered from the Palo Pintado Formation (Miocene–Pliocene) in Salta Province. These findings represent some of the westernmost occurrences of Ceratophrys in Argentina and extend the genus' paleobiogeographic range during the Late Neogene. The exceptional preservation of the IBIGEO-P 99 skull -despite potential reworking by transport- suggests a depositional setting related to sudden flooding and proximal overbank sedimentation (floodplain). This study enhances our understanding of the historical biogeography of Ceratophrys and highlights the paleoenvironmental and biostratigraphic significance of the Palo Pintado Formation as a key site for reconstructing Neogene ecosystems in northwestern Argentina.

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阿根廷西北部上中新世首个角鼻蝇（无尾目：角鼻蝇科）记录及其古生态意义

Ceratophryidae是南美洲新热带动物群的一个分支，在阿根廷中部新近纪有很好的化石记录，但在阿根廷西北部（NWA）很少有代表。本文描述了在Salta省Palo Pintado组（中新世-上新世）发现的2个角鼻虫科化石标本（ibigeo - p99和ibigeo - p128）。这些发现代表了阿根廷角鼻属在最西端的一些出现，并扩大了该属在晚新近纪的古生物地理范围。ibigeo - p99头骨的特殊保存——尽管可能因运输而被改造——表明其沉积环境与突然洪水和近岸沉积（洪泛平原）有关。该研究增强了我们对角鼻鸟历史生物地理学的认识，并强调了帕洛平塔多组作为阿根廷西北部新近系生态系统重建的关键地点的古环境和生物地层学意义。

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

Journal of South American Earth Sciences 地学-地球科学综合

CiteScore

3.70

自引率

22.20%

发文量

364

审稿时长

6-12 weeks

期刊介绍： Papers must have a regional appeal and should present work of more than local significance. Research papers dealing with the regional geology of South American cratons and mobile belts, within the following research fields: -Economic geology, metallogenesis and hydrocarbon genesis and reservoirs. -Geophysics, geochemistry, volcanology, igneous and metamorphic petrology. -Tectonics, neo- and seismotectonics and geodynamic modeling. -Geomorphology, geological hazards, environmental geology, climate change in America and Antarctica, and soil research. -Stratigraphy, sedimentology, structure and basin evolution. -Paleontology, paleoecology, paleoclimatology and Quaternary geology. New developments in already established regional projects and new initiatives dealing with the geology of the continent will be summarized and presented on a regular basis. Short notes, discussions, book reviews and conference and workshop reports will also be included when relevant.