Eychlaodus

Eychlaodus; Temporal range: Danian PreꞒ Ꞓ O S D C P T J K Pg N
Scientific classification
Kingdom:	Animalia
Phylum:	Chordata
Class:	Chondrichthyes
Subclass:	Elasmobranchii
Family:	†Orthacodontidae
Genus:	†Eychlaodus; Glickman [fr], 1957
Type species
	†Eychlaodus lundgreni; (Davis, 1890)
Synonyms
	Species synonymy Oxyrhina lundgreni ; Davis, 1890; Sphenodus lundgreni ; (Davis, 1890); ;

Eychlaodus is an extinct genus of neoselachians that lived during the Paleocene. It contains one species, E. lundgreni, which has been found in Denmark, Sweden, and Russia.

Taxonomy

Oxyrhina lundgreni was named by James W. Davis in 1890 for isolated teeth from various localities in Denmark and Sweden. In 1957, Leonid S. Glickman [fr] named the new genus Eychlaodus for this species and referred additional teeth from Russia to it. Eychlaodus was synonymized with Sphenodus by Henri Cappetta in 1987. However, their synonymy was rejected by David J. Ward and colleagues in 2026.

References

1 2 Glickman, L.S. (1957). "O geneticheskoy svyazi semeystva Lamnidae i Odontaspidae i novykh rodakh verkhnemelovykh lamnid [On the genetic relationship between the families Lamnidae and Odontaspidae and new genera of Upper Cretaceous lamnids]" (PDF). Trudy Geologicheskogo Muzeya Imeni A.P. Karpinskogo. 1: 110–117.
1 2 Davis, J.W. (1890). "On the fossil fish of the Cretaceous formations of Scandinavia". The Scientific Transactions of the Royal Dublin Society. Series II. 4 (6): 363–434.
↑ Cappetta, H. (1987). Handbook of Paleoichthyology. Volume 3B. Chondrichthyes II. Mesozoic and Cenozoic Elasmobranchii. Stuttgart, DE: Gustav Fischer Verlag. p. 50.
↑ Lopyrev, V.A.; Popov, E.V.; Ward, D.J. (2026). "Eychlaodus Glickman, 1957—a valid orthacodid genus for the Paleocene species E. lundgreni (Davis, 1890) (Elasmobranchii, Orthacodidae)". Zootaxa. 5886 (4): 597–600. doi:10.11646/zootaxa.5886.4.8.

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[Glickman_1957-1] 1 2 Glickman, L.S. (1957). "O geneticheskoy svyazi semeystva Lamnidae i Odontaspidae i novykh rodakh verkhnemelovykh lamnid [On the genetic relationship between the families Lamnidae and Odontaspidae and new genera of Upper Cretaceous lamnids]" (PDF). Trudy Geologicheskogo Muzeya Imeni A.P. Karpinskogo. 1: 110–117.

[Davis_1890-2] 1 2 Davis, J.W. (1890). "On the fossil fish of the Cretaceous formations of Scandinavia". The Scientific Transactions of the Royal Dublin Society. Series II. 4 (6): 363–434.

[Cappetta_1987-3] Cappetta, H. (1987). Handbook of Paleoichthyology. Volume 3B. Chondrichthyes II. Mesozoic and Cenozoic Elasmobranchii. Stuttgart, DE: Gustav Fischer Verlag. p. 50.

[Lopyrev_et_al._2026-4] Lopyrev, V.A.; Popov, E.V.; Ward, D.J. (2026). "Eychlaodus Glickman, 1957—a valid orthacodid genus for the Paleocene species E. lundgreni (Davis, 1890) (Elasmobranchii, Orthacodidae)". Zootaxa. 5886 (4): 597–600. doi:10.11646/zootaxa.5886.4.8.