Chimaerotheca schernfeldensis
Duffin, Lauer & Lauer, 2022
Classification: Holocephali Chimaeriformes incert. fam.
Reference of the original description
Chimaeroid egg cases from the Late Jurassic of the Solnhofen area (S Germany). Neues Jahrbuch für Geologie und Paläontologie, Abhandlungen, 306(2), 161–175
Chimaeroid egg cases from the Late Jurassic of the Solnhofen area (S Germany). Neues Jahrbuch für Geologie und Paläontologie, Abhandlungen, 306(2), 161–175
Description:
Citation: Chimaerotheca schernfeldensis Duffin, Lauer & Lauer, 2022: In: Database of fossil elasmobranch teeth www.shark-references.com, World Wide Web electronic publication, Version 11/2024
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Chimaerotheca schernfeldensis Duffin, Lauer & Lauer, 2022, Double egg capsule, Tithonian (Late Jurassic), Schernfeld Quarry, near Eichstätt, Germany (LF 703). A – Photographed under normal lighting. B – Photogrammetry image. © Christopher J. Duffin
Chimaerotheca schernfeldensis Duffin, Lauer & Lauer, 2022, Double egg capsule, Tithonian (Late Jurassic), Schernfeld Quarry, near Eichstätt, Germany (LF 703). A – Photographed under normal lighting. B – Photogrammetry image. © Christopher J. Duffin
Description
Original diagnose after Duffin et al. (2022) [31282]: Chimaeroid egg cases of rhinochimaerid type measuring up to 370 mm in length and 72 mm across at the widest point. The ratio of capsule length to maximum width is 5.1:1. The pedicle comprises around 60 % of the total length of the case. The lateral web is only moderately developed and strengthened with branched and occasional unbranched costae which are angled anteriorly at 70o to 80o in the beak region. In the trunk and pedicle regions the costae are directed posteriorly at increasingly acute angles (74o in central part of the trunk, changing to around 53o–55o at the trunk/pedicle junction and 45o in the proximal region of the pedicle). The posterior part of the pedicle is bare of web development. A central ridge is present down the length of the tail sheath in the midline of the pedicle.
Original diagnose after Duffin et al. (2022) [31282]: Chimaeroid egg cases of rhinochimaerid type measuring up to 370 mm in length and 72 mm across at the widest point. The ratio of capsule length to maximum width is 5.1:1. The pedicle comprises around 60 % of the total length of the case. The lateral web is only moderately developed and strengthened with branched and occasional unbranched costae which are angled anteriorly at 70o to 80o in the beak region. In the trunk and pedicle regions the costae are directed posteriorly at increasingly acute angles (74o in central part of the trunk, changing to around 53o–55o at the trunk/pedicle junction and 45o in the proximal region of the pedicle). The posterior part of the pedicle is bare of web development. A central ridge is present down the length of the tail sheath in the midline of the pedicle.
References
A review of the Late Jurassic chondrichthyan egg capsules from the Plattenkalk area of Southern Germany [Abstract]. In Book of abstracts, 8. Meeting on Mesozoic Fishes and Aquatic Tetrapods 10.–14. July 2023, Stuttgart, p. 29
Chimaeroid egg cases from the Late Jurassic of the Solnhofen area (S Germany). Neues Jahrbuch für Geologie und Paläontologie, Abhandlungen, 306(2), 161–175
DOI: 10.1127/njgpa/2022/1101
A review of the Late Jurassic chondrichthyan egg capsules from the Plattenkalk area of Southern Germany [Abstract]. In Book of abstracts, 8. Meeting on Mesozoic Fishes and Aquatic Tetrapods 10.–14. July 2023, Stuttgart, p. 29
Chimaeroid egg cases from the Late Jurassic of the Solnhofen area (S Germany). Neues Jahrbuch für Geologie und Paläontologie, Abhandlungen, 306(2), 161–175
DOI: 10.1127/njgpa/2022/1101
