全新世脊椎动物组合首次证明了在索科特拉岛(也门)上存在仓鸮(Tytonidae,Tyto alba)

IF 1.6 4区 地球科学 Q2 PALEONTOLOGY Geobios Pub Date : 2024-04-01 DOI:10.1016/j.geobios.2023.03.005
Gloria Ramello , Massimo Delfino , Emiliano Mori , Andrea Viviano , Giulio Pavia , Giorgio Carnevale , Marco Pavia
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引用次数: 0

摘要

我们描述了在索科特拉岛(也门)Taiti 洞穴内全新世沉积物中发现的脊椎动物遗骸。这些化石是在一个沙丘中发现的,沙丘几乎占据了洞穴的全部主要空腔,其中一些骨骼采集于洞穴表面,而大部分骨骼则发现于洞穴表面之下,特别是在一小层硬化的沙子之下,后者可能与鸟粪沉积有关。它们大多是孤立的骨头,但在鸟粪层下,其中一些骨头聚集在一起,可以辨认出属于猫头鹰的骨团。对脊椎动物遗骸的分析表明,猎物种类繁多,再加上骨盆堆积的位置和遗骸几乎完美的保存,表明该沉积物来自白鸮的骨盆堆积。在胡克洞穴的一处地层背景不确定的沉积物中发现的白琵鹭喙片也证实了这一假设。本文提供的数据是索科特拉岛上存在白琵鹭的首个有据可查的证据,表明在全新世期间,岛上可能存在现已灭绝的白琵鹭种群,而在十九世纪首次鸟类学调查时,该种群已经灭绝。
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Holocene vertebrate assemblages provide the first evidence for the presence of the barn owl (Tytonidae, Tyto alba) on Socotra Island (Yemen)

We describe the vertebrate remains found in a Holocene deposit inside the Taiti Cave, Socotra Island (Yemen). The fossils were found in a sand dune occupying almost entirely the main cavity of the Cave, with some bones collected on the surface and the majority of them found under its surface, in particular below a tiny level of hardened sand, the latter probably related to a guano deposit. They were mostly isolated bones, but under the guano layer, some of them were aggregated and recognizable as belonging to owl pellets. The analysis of the vertebrate remains reveals a great prey diversity and, together with the location of the pellet accumulation and the almost perfect preservation of the remains, indicates that the deposit derived from a pellet accumulation made by Tyto alba. This hypothesis is corroborated by a Tyto alba beak fragment found in the Hoq cave, in a deposit of uncertain stratigraphic context. The data presented herein represent the first documented evidence of the presence of Tyto alba on Socotra Island and indicate the probable existence of a now extinct population of Tyto alba on the island during the Holocene, already extinct at the time of the first ornithological surveys during the XIX Century.

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来源期刊
Geobios
Geobios 地学-古生物学
CiteScore
3.30
自引率
6.20%
发文量
28
审稿时长
6-12 weeks
期刊介绍: Geobios publishes bimonthly in English original peer-reviewed articles of international interest in any area of paleontology, paleobiology, paleoecology, paleobiogeography, (bio)stratigraphy and biogeochemistry. All taxonomic groups are treated, including microfossils, invertebrates, plants, vertebrates and ichnofossils. Geobios welcomes descriptive papers based on original material (e.g. large Systematic Paleontology works), as well as more analytically and/or methodologically oriented papers, provided they offer strong and significant biochronological/biostratigraphical, paleobiogeographical, paleobiological and/or phylogenetic new insights and perspectices. A high priority level is given to synchronic and/or diachronic studies based on multi- or inter-disciplinary approaches mixing various fields of Earth and Life Sciences. Works based on extant data are also considered, provided they offer significant insights into geological-time studies.
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