Vaillantoonia jonasoni
Johns & Fischer, 2025
Classification:
Reference of the original description
First chimaeroid fish egg capsule (Chondrichthyes, Holocephali, Chimaeriformes) from upper Eocene Carmanah Group strata, West Coast of Vancouver Island, British Columbia, Canada. Canadian Journal of Earth Sciences, 62(5), 1013–1042
First chimaeroid fish egg capsule (Chondrichthyes, Holocephali, Chimaeriformes) from upper Eocene Carmanah Group strata, West Coast of Vancouver Island, British Columbia, Canada. Canadian Journal of Earth Sciences, 62(5), 1013–1042
Description:
Citation: Vaillantoonia jonasoni Johns & Fischer, 2025: In: Database of fossil elasmobranch teeth www.shark-references.com, World Wide Web electronic publication, Version 09/2025
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Description
Original diagnosis after Johns & Fischer, 2025 p. 1032, 1033 [34449]: Elongate chimaeroid egg capsule (rhinochimaerid-like type C, subtype C2); 21.9 cm long and 8.2 cm wide (including membrane); tail elongate and narrow (<0.5 cm wide over most of its length and about 11.7 cm long), at posterior broadening to about 1.0 cm and bearing a thin median ridge; beak spatula-shaped (about 3.0 cm long × 1.2 cm wide) with a constriction at the junction between the beak and the central body; central body spindle-shaped; lateral web membrane with many primary costae (about 36–42 per side), which are convexly-arched with peripheral ends curving posteriorly; secondary costae are present.
Original diagnosis after Johns & Fischer, 2025 p. 1032, 1033 [34449]: Elongate chimaeroid egg capsule (rhinochimaerid-like type C, subtype C2); 21.9 cm long and 8.2 cm wide (including membrane); tail elongate and narrow (<0.5 cm wide over most of its length and about 11.7 cm long), at posterior broadening to about 1.0 cm and bearing a thin median ridge; beak spatula-shaped (about 3.0 cm long × 1.2 cm wide) with a constriction at the junction between the beak and the central body; central body spindle-shaped; lateral web membrane with many primary costae (about 36–42 per side), which are convexly-arched with peripheral ends curving posteriorly; secondary costae are present.
Remarks
shark-references Species-ID=17646
shark-references Species-ID=17646
References
First chimaeroid fish egg capsule (Chondrichthyes, Holocephali, Chimaeriformes) from upper Eocene Carmanah Group strata, West Coast of Vancouver Island, British Columbia, Canada. Canadian Journal of Earth Sciences, 62(5), 1013–1042
DOI: 10.1139/cjes-2024-0096
First record of a late Eocene–early Oligocene chimaeroid fish egg capsule in British Columbia. British Columbia. Paleontological Alliance Journal, Issue 02
First record of an Oligocene chimaeroid fish (Chondrichthyes, Holocephali, Chimaeriformes) egg capsule from Carmanah Group rocks, West Coast of Vancouver Island, British Columbia Canada [Abstract]. In 14th British Columbia Paleontological Symposium, Abstracts, June 9–12, 2023. University of Victoria, Victoria, B.C., 29–30
First chimaeroid fish egg capsule (Chondrichthyes, Holocephali, Chimaeriformes) from upper Eocene Carmanah Group strata, West Coast of Vancouver Island, British Columbia, Canada. Canadian Journal of Earth Sciences, 62(5), 1013–1042
DOI: 10.1139/cjes-2024-0096
First record of a late Eocene–early Oligocene chimaeroid fish egg capsule in British Columbia. British Columbia. Paleontological Alliance Journal, Issue 02
First record of an Oligocene chimaeroid fish (Chondrichthyes, Holocephali, Chimaeriformes) egg capsule from Carmanah Group rocks, West Coast of Vancouver Island, British Columbia Canada [Abstract]. In 14th British Columbia Paleontological Symposium, Abstracts, June 9–12, 2023. University of Victoria, Victoria, B.C., 29–30
