Pteroscyllium sweetmani
Duffin & Batchelor, 2024
Classification: Elasmobranchii Carcharhiniformes Scyliorhinidae
Reference of the original description
A chondrichthyan fauna from the Vectis Formation (Early Aptian, Early Cretaceous) of the Isle of Wight Neues Jahrbuch für Geologie und Paläontologie - Abhandlungen, 312(3), 325–354
A chondrichthyan fauna from the Vectis Formation (Early Aptian, Early Cretaceous) of the Isle of Wight Neues Jahrbuch für Geologie und Paläontologie - Abhandlungen, 312(3), 325–354
Images of types
Description:
Citation: Pteroscyllium sweetmani Duffin & Batchelor, 2024: In: Database of fossil elasmobranch teeth www.shark-references.com, World Wide Web electronic publication, Version 10/2024
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Pteroscyllium sweetmani Duffin & Batchelor, 2024, NHMUK PV P 77484, holotype, anterior tooth, Vectis Formation, Early Cretaceous, Aptian, Atherfield Point, Isle of Wight, UK, scale bar: 1 mm. © Duffin & Batchelor
Pteroscyllium sweetmani Duffin & Batchelor, 2024, NHMUK PV P 77484, holotype, anterior tooth, Vectis Formation, Early Cretaceous, Aptian, Atherfield Point, Isle of Wight, UK, scale bar: 1 mm. © Duffin & Batchelor
Description
Original description by Duffin & Batchelor, 2024 [33562]: Teeth showing considerable heterodonty and the following combination of characters: teeth ranging up to 4 mm high in which the central cusp is generally flanked by a single pair of lateral cusplets, although a second pair is occasionally developed either fully or in rudimentary form. Crown ornamentation comprises a series of very coarse, occasionally bifurcating vertical ridges which may extend 90% of the way up the central cusp labially. Lingual vertical ridges are similar but finer and more variable in their height up the central cusp. Lateral cusplet axes are subparallel to the central cusp axis. The central cusp varies from high and fairly gracile in anterior teeth to much lower and wide-based in lateral teeth. The central cusp is even lower and basally wider in posterior teeth. The central cusp is upright in anterior teeth becoming more distally inclined with a progressively more steeply angled basal kink through lateral to posterior files. The root varies from subequal to longer than the crown in mesiodistal width. Root vascularisation is holaulacorhize. The labial protuberance is well developed, the extremities of the mesial and distal root prongs are slightly compressed and the basal arch is U- to V-shaped.
Original description by Duffin & Batchelor, 2024 [33562]: Teeth showing considerable heterodonty and the following combination of characters: teeth ranging up to 4 mm high in which the central cusp is generally flanked by a single pair of lateral cusplets, although a second pair is occasionally developed either fully or in rudimentary form. Crown ornamentation comprises a series of very coarse, occasionally bifurcating vertical ridges which may extend 90% of the way up the central cusp labially. Lingual vertical ridges are similar but finer and more variable in their height up the central cusp. Lateral cusplet axes are subparallel to the central cusp axis. The central cusp varies from high and fairly gracile in anterior teeth to much lower and wide-based in lateral teeth. The central cusp is even lower and basally wider in posterior teeth. The central cusp is upright in anterior teeth becoming more distally inclined with a progressively more steeply angled basal kink through lateral to posterior files. The root varies from subequal to longer than the crown in mesiodistal width. Root vascularisation is holaulacorhize. The labial protuberance is well developed, the extremities of the mesial and distal root prongs are slightly compressed and the basal arch is U- to V-shaped.
Remarks
shark-references Species-ID=17439
shark-references Species-ID=17439
Image gallery
References
A chondrichthyan fauna from the Vectis Formation (Early Aptian, Early Cretaceous) of the Isle of Wight Neues Jahrbuch für Geologie und Paläontologie - Abhandlungen, 312(3), 325–354
DOI: 10.1127/njgpa/2024/1217
A chondrichthyan fauna from the Vectis Formation (Early Aptian, Early Cretaceous) of the Isle of Wight Neues Jahrbuch für Geologie und Paläontologie - Abhandlungen, 312(3), 325–354
DOI: 10.1127/njgpa/2024/1217
