Redescription of soft tissue preservation in the holotype of Scaphognathus crassirostris (Goldfuß, 1831) using reflectance transformation imaging

IF 2 4区 地球科学 Q1 Earth and Planetary Sciences
Nils Henkemeier, K. Jäger, M. Sander
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Abstract

The description of the holotype of the non-pterodactyloid pterosaur Scaphog-nathus crassirostris from the Upper Jurassic Solnhofen Formation by the German palaeontologist Georg August Goldfuß in 1831 was the basis for the first published scientific life reconstruction of a pterosaur. In the time since Goldfuß, the technologies used in imaging soft parts in fossils have advanced greatly, but despite its historical importance, the holotype of S. crassirostris has received relatively little attention, limiting comparisons to more recent pterosaurian soft part finds. In this study, reflectance transformation imaging (RTI) was used to investigate fine surface details of the S. cras-sirostris type specimen. The observations of Goldfuß concerning the existence of different preservational patterns of the hair-like integumentary structures (pycnofibres) in this specimen were confirmed. Individual pycnofibre types differ both in their position and frequency and may indicate variation in pycnofibre morphology across different body regions in the living animal. Pycnofibre types forming a ‘tuft’ or a ‘feather-like’ structure are similar to those of other pterosaur fossils from the southern German Sol-nhofen Formation and the northeastern Chinese Tiaojishan Formation. However, some types, such as ‘forked’ pycnofibre impressions, could be artefacts of taphonomic processes. This study provides further evidence for the similarity in the preservation of integumentary appendages and associated preservational patterns in pterosaurs across different localities, palaeoenvironments, stratigraphic ages
利用反射变换成像重新描述骨舟骨(Goldfuß, 1831)全型标本中软组织的保存
1831年,德国古生物学家Georg August Goldfuß对来自上侏罗统Solnhofen组的非翼手类翼龙Scaphog-nathus crassirostris的全型描述,为首次发表的翼龙生命重建奠定了基础。自Goldfuß以来,用于化石软部成像的技术已经取得了很大的进步,但尽管具有历史重要性,S. crassirostris的全模化石受到的关注相对较少,这限制了与最近发现的翼龙软部的比较。本研究采用反射变换成像(RTI)技术研究了S. cras-sirostris型标本的精细表面细节。Goldfuß关于在该标本中存在不同的毛发状被皮结构(pycnofibers)保存模式的观察得到了证实。个体碧萝丝的类型在位置和频率上都不同,这可能表明在活体动物的不同身体区域,碧萝丝的形态存在差异。形成“簇状”或“羽毛状”结构的翼龙纤维类型与德国南部Sol-nhofen组和中国东北部条集山组的其他翼龙化石相似。然而,有些类型,如“分叉”的纤维印痕,可能是埋藏过程的人工制品。本研究为不同地区、不同古环境、不同地层时代翼龙的外皮附属物保存模式的相似性提供了进一步的证据
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来源期刊
Palaeontologia Electronica
Palaeontologia Electronica 地学-古生物学
CiteScore
3.60
自引率
0.00%
发文量
20
审稿时长
>12 weeks
期刊介绍: Founded in 1997, Palaeontologia Electronica (PE) is the longest running open-access, peer-reviewed electronic journal and covers all aspects of palaeontology. PE uses an external double-blind peer review system for all manuscripts. Copyright of scientific papers is held by one of the three sponsoring professional societies at the author''s choice. Reviews, commentaries, and other material is placed in the public domain. PE papers comply with regulations for taxonomic nomenclature established in the International Code of Zoological Nomenclature and the International Code of Nomenclature for Algae, Fungi, and Plants.
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