Lissodus duffini
Prasad, Singh, Parmar, Goswami, & Sudan, 2008
Classification: Elasmobranchii Hybodontiformes fam. indet
Reference of the original description
Hybodont shark teeth from the continental Upper Triassic deposits of India. In G. Arratia, H.-P. Schultze & M.V.H. Wilson (Eds.), Mesozoic Fishes 4 – Homology and Phylogeny (pp. 413–432). Verlag Dr. Friedrich Pfeil
Hybodont shark teeth from the continental Upper Triassic deposits of India. In G. Arratia, H.-P. Schultze & M.V.H. Wilson (Eds.), Mesozoic Fishes 4 – Homology and Phylogeny (pp. 413–432). Verlag Dr. Friedrich Pfeil
Description:
Citation: Lissodus duffini Prasad, Singh, Parmar, Goswami, & Sudan, 2008: In: Database of fossil elasmobranch teeth www.shark-references.com, World Wide Web electronic publication, Version 08/2026
Description
Original diagnosis after Prasad, Singh, Parmar, Goswami, & Sudan, 2008 [1935]: The mesial teeth display a triangular outline in occlusal view. The occlusal crest is prominent and arcuate. The principal cusp is diamond-shaped with two pairs of lateral cusplets. A large triangular labial peg occupies a major part of the labial face of the crown. The longitudinal ridge is well-developed lingually and moderately developed labially. The crowns are medially arched with smooth labial and lingual faces and a triangular basal surface of the crown at the crown/root junction. The mesio-lateral teeth are less robust than the mesial teeth with a relatively reduced principal cusp, a reduced labial peg, and less lingually curved lateral extremities. The lateral teeth are more mesio-distally elongated than the mesial and mesio-lateral teeth. The principal cusp of the lateral teeth is reduced in height, and the labial peg is greatly reduced. The crown/root junction is elongated mesio-distally (spindle-shaped), and the crown is more robustly constructed. The disto-lateral teeth are labio-lingually compressed with a reduced but still prominent principal cusp. The lateral cusplets and the labial peg are all highly reduced.
Original diagnosis after Prasad, Singh, Parmar, Goswami, & Sudan, 2008 [1935]: The mesial teeth display a triangular outline in occlusal view. The occlusal crest is prominent and arcuate. The principal cusp is diamond-shaped with two pairs of lateral cusplets. A large triangular labial peg occupies a major part of the labial face of the crown. The longitudinal ridge is well-developed lingually and moderately developed labially. The crowns are medially arched with smooth labial and lingual faces and a triangular basal surface of the crown at the crown/root junction. The mesio-lateral teeth are less robust than the mesial teeth with a relatively reduced principal cusp, a reduced labial peg, and less lingually curved lateral extremities. The lateral teeth are more mesio-distally elongated than the mesial and mesio-lateral teeth. The principal cusp of the lateral teeth is reduced in height, and the labial peg is greatly reduced. The crown/root junction is elongated mesio-distally (spindle-shaped), and the crown is more robustly constructed. The disto-lateral teeth are labio-lingually compressed with a reduced but still prominent principal cusp. The lateral cusplets and the labial peg are all highly reduced.
Remarks
shark-references Species-ID=7667;
shark-references Species-ID=7667;
References
New microvertebrate assemblage from the continental upper triassic rocks of peninsular India [Abstract]. Journal of Vertebrate Paleontology, 29(Supplement to Number 3), 167A
Hybodont shark teeth from the continental Upper Triassic deposits of India. In G. Arratia, H.-P. Schultze & M.V.H. Wilson (Eds.), Mesozoic Fishes 4 – Homology and Phylogeny (pp. 413–432). Verlag Dr. Friedrich Pfeil
Brief synopsis of the hybodont form taxon Lissodus BROUGH, 1935, with remarks on the environment and associated fauna. Freiberger Forschungshefte, C528, 1–23
Microscopic chondrichthyan remains from Pennsylvanian marine rocks of Ohio and adjacent areas. Unpublished PhD thesis, Ohio State University, Columbus, Ohio. 2 vols. 514pp.
New microvertebrate assemblage from the continental upper triassic rocks of peninsular India [Abstract]. Journal of Vertebrate Paleontology, 29(Supplement to Number 3), 167A
Hybodont shark teeth from the continental Upper Triassic deposits of India. In G. Arratia, H.-P. Schultze & M.V.H. Wilson (Eds.), Mesozoic Fishes 4 – Homology and Phylogeny (pp. 413–432). Verlag Dr. Friedrich Pfeil
Brief synopsis of the hybodont form taxon Lissodus BROUGH, 1935, with remarks on the environment and associated fauna. Freiberger Forschungshefte, C528, 1–23
Microscopic chondrichthyan remains from Pennsylvanian marine rocks of Ohio and adjacent areas. Unpublished PhD thesis, Ohio State University, Columbus, Ohio. 2 vols. 514pp.
