Maiseyacanthus ozarkanum
Bronson, 2021
Classification: Holocephali Symmoriiformes incert. fam.
Reference of the original description
A three-dimensionally preserved stethacanthid cranium and endocast from the Late Mississippian Fayetteville Shale (Arkansas, USA). In: Ancient Fishes and their Living Relatives: a Tribute to John G. Maisey. Alan Pradel, John S. S. Denton & Philippe Janvier (eds.): pp. 93-100, Verlag Dr. Friedrich Pfeil, München, Germany
A three-dimensionally preserved stethacanthid cranium and endocast from the Late Mississippian Fayetteville Shale (Arkansas, USA). In: Ancient Fishes and their Living Relatives: a Tribute to John G. Maisey. Alan Pradel, John S. S. Denton & Philippe Janvier (eds.): pp. 93-100, Verlag Dr. Friedrich Pfeil, München, Germany
Description:
Citation: Maiseyacanthus ozarkanum Bronson, 2021: In: Database of fossil elasmobranch teeth www.shark-references.com, World Wide Web electronic publication, Version 08/2026
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Description
Original diagnosis after Bronson, 2021 [31292]: According to the present description, Maiseyacanthus may be diagnosed as follows : Chondrichthyan features : Tessellated calcified cartilage, placoid scales (cranial cap denticles) Symmoriiform features : Enclosed, median dorsal aorta; single-crowned cranial cap denticles, cladodont teeth with small lateral cusps, no serrations, and a reniform tooth base. Autapomorphies of genus and species: platybasic skull, cranium with expanded roof in the otic region, and with a very large foramen magnum (approximately 1/5 of the width of the cranium), foramen magnum steeply angled in relation to the rest of the cranial cavity (appx. 100° relative to the angle of the external semicircular canal), four spino-occipital foramina present, lateral otic shelf upwardly curved and scooplike, large fossa present just medial to lateral otic process, periotic shelf present but very slight.
Original diagnosis after Bronson, 2021 [31292]: According to the present description, Maiseyacanthus may be diagnosed as follows : Chondrichthyan features : Tessellated calcified cartilage, placoid scales (cranial cap denticles) Symmoriiform features : Enclosed, median dorsal aorta; single-crowned cranial cap denticles, cladodont teeth with small lateral cusps, no serrations, and a reniform tooth base. Autapomorphies of genus and species: platybasic skull, cranium with expanded roof in the otic region, and with a very large foramen magnum (approximately 1/5 of the width of the cranium), foramen magnum steeply angled in relation to the rest of the cranial cavity (appx. 100° relative to the angle of the external semicircular canal), four spino-occipital foramina present, lateral otic shelf upwardly curved and scooplike, large fossa present just medial to lateral otic process, periotic shelf present but very slight.
Remarks
shark-references Species-ID=16378;
type species of Maiseyacanthus Bronson, 2021 [31292] by monotypy (Art. 68.3 ICZN);
shark-references Species-ID=16378;
type species of Maiseyacanthus Bronson, 2021 [31292] by monotypy (Art. 68.3 ICZN);
References
A three-dimensionally preserved stethacanthid cranium and endocast from the Late Mississippian Fayetteville Shale (Arkansas, USA). In: Ancient Fishes and their Living Relatives: a Tribute to John G. Maisey. Alan Pradel, John S. S. Denton & Philippe Janvier (eds.): pp. 93-100, Verlag Dr. Friedrich Pfeil, München, Germany
A three-dimensionally preserved stethacanthid cranium and endocast from the Late Mississippian Fayetteville Shale (Arkansas, USA). In: Ancient Fishes and their Living Relatives: a Tribute to John G. Maisey. Alan Pradel, John S. S. Denton & Philippe Janvier (eds.): pp. 93-100, Verlag Dr. Friedrich Pfeil, München, Germany
