Sulcidens sulcidens
(Darteville & Casier, 1943)
Classification: Elasmobranchii Myliobatiformes incert. fam.
Synonyms / new combinations and misspellings
Myliobatis arambourgi, Myliobatis sulcidens
Myliobatis arambourgi, Myliobatis sulcidens
Description:
Citation: Sulcidens sulcidens (Darteville & Casier, 1943): In: Database of fossil elasmobranch teeth www.shark-references.com, World Wide Web electronic publication, Version 08/2026
Description
Amended Diagnosis after Underwood, Kolmann & Ward, 2017 [25382]: Myliobatid known only from articulated and disarticulated dentitions. Little dignathic heterodonty, with teeth presumed from lower dentitions higher and more robust. Dentition of alternating rows comprising a large symphyseal tooth and one pair of lateral teeth in one row alternating with a row with two pairs of lateral teeth; symphyseal teeth are far wider than deep, lateral teeth are of similar size within the dentition and roughly diamond-shaped. Lateral teeth and lateral parts of symphyseal teeth strongly concave. Occlusal face of teeth finely granulose, with in-life wear very reduced relative to other myliobatids or absent. Tooth crowns slightly displaced lingually. Root lobes with rounded bases and widely separated. Teeth weakly joined within dentition with suturing moderate to absent.
Amended Diagnosis after Underwood, Kolmann & Ward, 2017 [25382]: Myliobatid known only from articulated and disarticulated dentitions. Little dignathic heterodonty, with teeth presumed from lower dentitions higher and more robust. Dentition of alternating rows comprising a large symphyseal tooth and one pair of lateral teeth in one row alternating with a row with two pairs of lateral teeth; symphyseal teeth are far wider than deep, lateral teeth are of similar size within the dentition and roughly diamond-shaped. Lateral teeth and lateral parts of symphyseal teeth strongly concave. Occlusal face of teeth finely granulose, with in-life wear very reduced relative to other myliobatids or absent. Tooth crowns slightly displaced lingually. Root lobes with rounded bases and widely separated. Teeth weakly joined within dentition with suturing moderate to absent.
Remarks
shark-references Species-ID=14904;
type species (Myliobatis sulcidens) of Sulcidens Underwood, Kolmann & Ward, 2017 [25382] by monotypy (Art. 68.3 ICZN);
shark-references Species-ID=14904;
type species (Myliobatis sulcidens) of Sulcidens Underwood, Kolmann & Ward, 2017 [25382] by monotypy (Art. 68.3 ICZN);
References
A Paleogene chondrichthyan assemblage from central Chile supports a latitudinal and temporal boundary of the Weddellian Province along the southeastern Pacific. Acta Palaeontologica Polonica, 71(2), 255–266
DOI: 10.4202/app.01299.2025
Global impact and selectivity of the Cretaceous-Paleogene mass extinction among sharks, skates, and rays. Science, 379, 802–806
DOI: 10.1126/science.abn2080
Reassessment of historical sections from the Paleogene marine margin of the Congo Basin reveals an almost complete absence of Danian deposits. Geoscience Frontiers, 10(3), 1039-1063
DOI: 10.1016/j.gsf.2018.06.002
Generic Assessment and Reallocation of Cenozoic Myliobatinae based on new information of tooth, tooth plate and caudal spine morphology of extant taxa. Palaeontos, 24, 1–66
Generic Assessment and Reallocation of Cenozoic Myliobatinae based on new information of tooth, tooth plate and caudal spine morphology of extant taxa. Palaeontos, 24, 1–66
Contribution à l'étude des élasmobranches du Thanétien (Paléocène) du Bassin de Paris. 1. Découverte d'une faune d'Elasmobranches dans la partie supérieure des Sables de Bracheux (Thanétien, Paléocène du Bassin de Paris) des régions de Compiègne (Oise) et de Montdidier (Somme). Belgian Geological Survey, Professional Paper, Elasmobranches et Stratigraphie, 278, 185–259
(Sharks of Paleogene and their stratigraphic significance). «in russian». Nauka Press: 229 p., 76 fig., 31 pl. Moscou.
Note sur la collection des poissons paléocènes et éocènes de l'Enclave de Cabinda (Congo). Annales du Musée du Congo Belge, Sér. A (Minéralogie Géologie, Paléontologie), 1(2): 1–48
Les poissons fossiles du Bas-Congo et des régions voisines. Annales du Musée du Congo Belge, Sér. A (Minéralogie Géologie, Paléontologie), 3, 2(3): 257–568
Les vertébrés fossiles des gisements de phosphates (Maroc-Algérie-Tunisie). Notes et Mémoires du Service Géologique du Maroc, 92, 1–372
A Paleogene chondrichthyan assemblage from central Chile supports a latitudinal and temporal boundary of the Weddellian Province along the southeastern Pacific. Acta Palaeontologica Polonica, 71(2), 255–266
DOI: 10.4202/app.01299.2025
Global impact and selectivity of the Cretaceous-Paleogene mass extinction among sharks, skates, and rays. Science, 379, 802–806
DOI: 10.1126/science.abn2080
Reassessment of historical sections from the Paleogene marine margin of the Congo Basin reveals an almost complete absence of Danian deposits. Geoscience Frontiers, 10(3), 1039-1063
DOI: 10.1016/j.gsf.2018.06.002
Generic Assessment and Reallocation of Cenozoic Myliobatinae based on new information of tooth, tooth plate and caudal spine morphology of extant taxa. Palaeontos, 24, 1–66
Generic Assessment and Reallocation of Cenozoic Myliobatinae based on new information of tooth, tooth plate and caudal spine morphology of extant taxa. Palaeontos, 24, 1–66
Contribution à l'étude des élasmobranches du Thanétien (Paléocène) du Bassin de Paris. 1. Découverte d'une faune d'Elasmobranches dans la partie supérieure des Sables de Bracheux (Thanétien, Paléocène du Bassin de Paris) des régions de Compiègne (Oise) et de Montdidier (Somme). Belgian Geological Survey, Professional Paper, Elasmobranches et Stratigraphie, 278, 185–259
(Sharks of Paleogene and their stratigraphic significance). «in russian». Nauka Press: 229 p., 76 fig., 31 pl. Moscou.
Note sur la collection des poissons paléocènes et éocènes de l'Enclave de Cabinda (Congo). Annales du Musée du Congo Belge, Sér. A (Minéralogie Géologie, Paléontologie), 1(2): 1–48
Les poissons fossiles du Bas-Congo et des régions voisines. Annales du Musée du Congo Belge, Sér. A (Minéralogie Géologie, Paléontologie), 3, 2(3): 257–568
Les vertébrés fossiles des gisements de phosphates (Maroc-Algérie-Tunisie). Notes et Mémoires du Service Géologique du Maroc, 92, 1–372
