Avian diversity and behavior in an Eocene coastal plain, Svalbard: the ichnological evidence

IF 0.8 4区 地球科学 Q4 PALEONTOLOGY
Ricardo N. Melchor, A. Uchman, R. Steel
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引用次数: 1

Abstract

Abstract This study presents an ichnotaxonomical assessment of bird footprints from a coastal plain setting in the Eocene lower to middle Aspelintoppen Formation in Brongniartfjellet and Storvola, Svalbard. These footprints are unique evidence for Paleogene birds from Svalbard and the second evidence of Paleogene avifauna of the Arctic (along with scarce fossil remains from Ellesmere Island). The analyzed footprints are assigned to six ichnotaxa belonging to three ichnofamilies: Aquatilavipes isp., avian footprint morphotype A and B (ichnofamily Avipedidae); Gruipeda cf. G. abeli, Gruipeda cf. G. dominguensis (ichnofamily Gruipedidae); and Gyeongsangornipes isp. (ichnofamily unknown). Associated invertebrate ichnofossils include Helminthoidichnites tenuis, Cochlichnus anguineus, and Helminthopsis isp. The avian footprints reflect small, medium-sized and rare large birds that can be morphologically compared to those of modern relatives including crane, heron, plover, moorhen, gallinule, oystercatcher and curlew. It is also proposed that in situ sets of shorebird footprints showing a preferred orientation, not composing trackways and showing overprinting, can be used as an indicator of the position and orientation of the shoreline.
斯瓦尔巴群岛始新世海岸平原鸟类多样性和行为:技术证据
摘要对斯瓦尔巴群岛Brongniartfjellet和Storvola地区始新世沿海平原下至中Aspelintoppen组鸟类足迹进行了技术分类研究。这些脚印是斯瓦尔巴群岛古近纪鸟类的独特证据,也是北极古近纪鸟类的第二个证据(还有来自埃尔斯米尔岛的稀有化石遗迹)。分析的足迹归属于3个鱼科的6个鱼分类群:水龙鱼(Aquatilavipes);A、B型鸟类足迹(飞禽科);Gruipeda cf. G. abeli, Gruipeda cf. G. dominguensis(鱼科Gruipeda dae);和庆尚县的isp。(ichnofamily未知)。相关的无脊椎鱼类化石包括Helminthoidichnites tenuis, Cochlichnus anguineus和Helminthopsis isp。鸟类足迹反映了小型,中型和稀有的大型鸟类,可以在形态上与现代近亲进行比较,包括鹤,苍鹭,鸻,赤蛋鸡,捕牡蛎者和杓鹬。此外,我们还提出了一组呈现优先方向的滨鸟足迹,而不是组成轨迹和叠印,可以作为海岸线位置和方向的指示器。
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来源期刊
CiteScore
2.50
自引率
12.50%
发文量
0
审稿时长
>12 weeks
期刊介绍: The foremost aim of Ichnos is to promote excellence in ichnologic research. Primary emphases center upon the ethologic and ecologic significance of tracemaking organisms; organism-substrate interrelationships; and the role of biogenic processes in environmental reconstruction, sediment dynamics, sequence or event stratigraphy, biogeochemistry, and sedimentary diagenesis. Each contribution rests upon a firm taxonomic foundation, although papers dealing solely with systematics and nomenclature may have less priority than those dealing with conceptual and interpretive aspects of ichnology. Contributions from biologists and geologists are equally welcome. The format for Ichnos is designed to accommodate several types of manuscripts, including Research Articles (comprehensive articles dealing with original, fundamental research in ichnology), and Short Communications (short, succinct papers treating certain aspects of the history of ichnology, book reviews, news and notes, or invited comments dealing with current or contentious issues). The large page size and two-column format lend flexibility to the design of tables and illustrations. Thorough but timely reviews and rapid publication of manuscripts are integral parts of the process.
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