Heterotorpedo fowleri
Ward, 1983
Classification: Elasmobranchii Myliobatiformes Dasyatidae
Reference of the original description
Additions to the fish fauna of the English Palaeogene. 4. A new batoid genus from the Bracklesham Group of Selsea, Sussex. Tertiary Research, 5(2), 105–114
Additions to the fish fauna of the English Palaeogene. 4. A new batoid genus from the Bracklesham Group of Selsea, Sussex. Tertiary Research, 5(2), 105–114
Types
Heterotorpedo fowleri
Holotype: BMNH.: P.61157; Paratype: BMNH.: P.61158; BMNH.: P.61159; BMNH.: P.61160; BMNH.: P.61161; BMNH.: P.61162; BMNH.: P.61163; BMNH.: P.61165; BMNH.: P.61166; BMNH.: P.61167; NHMUK: PV P 61168; NHMUK: PV P 61167; NHMUK: PV P 61160; NHMUK: PV P 61161; NHMUK: PV P 61165; NHMUK: PV P 61162; NHMUK: PV P 61166; NHMUK: PV P 61163; NHMUK: PV P 61157; NHMUK: PV P 61164; NHMUK: PV P 61159; NHMUK: PV P 61158;
Heterotorpedo fowleri
Holotype: BMNH.: P.61157; Paratype: BMNH.: P.61158; BMNH.: P.61159; BMNH.: P.61160; BMNH.: P.61161; BMNH.: P.61162; BMNH.: P.61163; BMNH.: P.61165; BMNH.: P.61166; BMNH.: P.61167; NHMUK: PV P 61168; NHMUK: PV P 61167; NHMUK: PV P 61160; NHMUK: PV P 61161; NHMUK: PV P 61165; NHMUK: PV P 61162; NHMUK: PV P 61166; NHMUK: PV P 61163; NHMUK: PV P 61157; NHMUK: PV P 61164; NHMUK: PV P 61159; NHMUK: PV P 61158;
Description:
Citation: Heterotorpedo fowleri Ward, 1983: In: Database of fossil elasmobranch teeth www.shark-references.com, World Wide Web electronic publication, Version 11/2024
Description
Original diagnose after Ward (1983) p. 107 [2494]: Torpedinid ray, known only from isolated fossil teeth. Anterior teeth: Crown quadrate in occlusal view with moderately concave labial and lateral margins giving rise to a pair of labia-lateral lappets. In lateral view the crown is sub-triangular with a strong lingual inclination. A cuttingedge may run from just above the basal margin on each lappet to the apex. In some specimens a transverse ridge traverses the labial margin connecting the two cutting-edges at their bases. The enameloid surface bounded by the cutting-edge and the labial ridge is concave and may be smooth, ornamented on the mesial side of the cutting edges or fully ornamented. When present, the ornamentation is lost towards the apex as the surface becomes convex. Root simple, bifid, lingually placed. Antero-lateral teeth: Crown sub-quadrate to triangular in occlusal view, triangular in lateral view. Lappets weakly developed or absent. The triangular occlusal surface is ornamented and depressed. The roots are simple, bifid, basally flat, relatively large, lingually placed. Lateral teeth: Crown ovoid in occlusal view, sometimes with a flattened labial margin. The occlusal surface is depressed and fully ornamented. In lateral view the crown is quadrate, higher lingually. The root is massive, bifid, and centrally placed.
Original diagnose after Ward (1983) p. 107 [2494]: Torpedinid ray, known only from isolated fossil teeth. Anterior teeth: Crown quadrate in occlusal view with moderately concave labial and lateral margins giving rise to a pair of labia-lateral lappets. In lateral view the crown is sub-triangular with a strong lingual inclination. A cuttingedge may run from just above the basal margin on each lappet to the apex. In some specimens a transverse ridge traverses the labial margin connecting the two cutting-edges at their bases. The enameloid surface bounded by the cutting-edge and the labial ridge is concave and may be smooth, ornamented on the mesial side of the cutting edges or fully ornamented. When present, the ornamentation is lost towards the apex as the surface becomes convex. Root simple, bifid, lingually placed. Antero-lateral teeth: Crown sub-quadrate to triangular in occlusal view, triangular in lateral view. Lappets weakly developed or absent. The triangular occlusal surface is ornamented and depressed. The roots are simple, bifid, basally flat, relatively large, lingually placed. Lateral teeth: Crown ovoid in occlusal view, sometimes with a flattened labial margin. The occlusal surface is depressed and fully ornamented. In lateral view the crown is quadrate, higher lingually. The root is massive, bifid, and centrally placed.
Remarks
shark-references Species-ID=2837;
type species of Heterotorpedo Ward, 1983 p. 107 [2494] by original designation (Art. 68.2 ICZN);
valid after Ward (1983) p. 107 [2494];
shark-references Species-ID=2837;
type species of Heterotorpedo Ward, 1983 p. 107 [2494] by original designation (Art. 68.2 ICZN);
valid after Ward (1983) p. 107 [2494];
References
Part 3. Rays from the Fisher/Sullivan Site. In R.E. Weems(ed.), Fossil Vertebrates and Plants from the Fisher/Sullivan Site(Stafford County): A Record of Early Eocene Life in Virginia. Virginia Division of Mineral Resources 152: 39–51
An Illustrated Guide to the British Middle Eocene Vertebrates. Privately published, London, 59 pp.
Additions to the fish fauna of the English Palaeogene. 4. A new batoid genus from the Bracklesham Group of Selsea, Sussex. Tertiary Research, 5(2), 105–114
Part 3. Rays from the Fisher/Sullivan Site. In R.E. Weems(ed.), Fossil Vertebrates and Plants from the Fisher/Sullivan Site(Stafford County): A Record of Early Eocene Life in Virginia. Virginia Division of Mineral Resources 152: 39–51
An Illustrated Guide to the British Middle Eocene Vertebrates. Privately published, London, 59 pp.
Additions to the fish fauna of the English Palaeogene. 4. A new batoid genus from the Bracklesham Group of Selsea, Sussex. Tertiary Research, 5(2), 105–114
