来自新西兰的一具长牙的海豚化石和对鲸类化石中平卧牙齿的分析

IF 2.1 4区 综合性期刊 Q2 MULTIDISCIPLINARY SCIENCES
Ambre Coste, Robert Ewan Fordyce, Carolina Loch
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引用次数: 0

摘要

对齿螈化石的解剖描述和分类学的研究为了解齿螈的进化史和多样性提供了新的思路。这项研究分析了齿螈的象牙状牙齿,包括对来自新西兰北奥塔哥怀塔基山谷的新物种Nihoroa reimaea的描述。本文详细描述了一种纤细、长颈的齿齿动物Nihoroa reaea的牙齿特征,它具有平卧的象牙状前牙和略具小齿的颊齿。对来自新西兰标本和世界其他地方的象牙状牙齿进行了比较分析,允许对齿形动物中的象牙状牙齿进行分类,并强调了真正的象牙和有根的平卧牙齿之间的差异。相关分析显示齿喙比例与牙冠形态有显著的相关性。这项研究有助于了解象牙状牙齿,并阐明其在齿状动物进化中的意义。Nihoroa reaea扩展了我们对鲸类化石的认识,并突出了新西兰具有象牙状牙齿的齿龙化石记录的重要性。
本文章由计算机程序翻译,如有差异,请以英文原文为准。
A new fossil dolphin with tusk-like teeth from New Zealand and an analysis of procumbent teeth in fossil cetaceans
Studies involving anatomical description and taxonomy of fossil odontocetes offer insights into their evolutionary history and diversity. This study analyses tusk-like teeth in odontocetes including the description of a new species, Nihoroa reimaea, from the Waitaki valley, North Otago, New Zealand. Dental features of Nihoroa reimaea, a gracile, longirostrine odontocete with procumbent tusk-like anterior teeth and slightly denticulate cheek teeth, are described in detail. A comparative analysis of tusk-like teeth from New Zealand specimens and from elsewhere in the world was performed allowing a classification of tusk-like teeth in odontocetes and highlighting the differences between true tusks and rooted procumbent teeth. Correlation analyses revealed significant associations between rostrum proportions and tooth crown morphology. This study contributes to the understanding of tusk-like teeth and illuminates their significance in odontocete evolution. Nihoroa reimaea expands our knowledge of fossil cetaceans and highlights the importance of New Zealand's exceptional fossil record of odontocetes with tusk-like teeth.
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来源期刊
Journal of the Royal Society of New Zealand
Journal of the Royal Society of New Zealand 综合性期刊-综合性期刊
CiteScore
4.60
自引率
0.00%
发文量
74
审稿时长
3 months
期刊介绍: Aims: The Journal of the Royal Society of New Zealand reflects the role of Royal Society Te Aparangi in fostering research and debate across natural sciences, social sciences, and the humanities in New Zealand/Aotearoa and the surrounding Pacific. Research published in Journal of the Royal Society of New Zealand advances scientific knowledge, informs government policy, public awareness and broader society, and is read by researchers worldwide.
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