Eosemionotus

Eosemionotus Temporal range: Anisian to Ladinian PreꞒ Ꞓ O S D C P T J K Pg N
Eosemionotus sp. fossil
Scientific classification
Domain:	Eukaryota
Kingdom:	Animalia
Phylum:	Chordata
Class:	Actinopterygii
Clade:	Ginglymodi
Order:	†Semionotiformes
Family:	†Macrosemiidae
Genus:	†Eosemionotus Stolley, 1919
Type species
†Allolepidotus vogeli von Fritsch, 1906
Species
See text

Eosemionotus ("dawn Semionotus") is an extinct genus of prehistoric marine macrosemiid ray-finned fish from the Middle Triassic (Anisian to Ladinian). It was a speciose genus known from throughout Europe, including formations of the Muschelkalk.[1][2]

The following species are known:[2][3]

• E. ceresiensis Bürgin, 2004 - early Ladinian of Italy (Besano Formation)
• E. diskosomus López-Arbarello et al., 2019 - early Ladinian of Italy (Meride Formation) and Switzerland (Cassina Formation)
• E. minutus López-Arbarello et al., 2019 - early Ladinian of Italy (Meride Formation)
• E. ratumensis Diependaal et al. 2024 - mid-late Anisian of the Netherlands (Vossenveld Formation)[4]
• E. sceltrichensis López-Arbarello et al., 2019 - Ladinian of Switzerland (Meride Formation)
• E. vogeli (von Fritsch, 1906) - late Anisian of Germany (Heilbronn Formation) (=Allolepidotus vogeli von Fritsch, 1906)

In addition, indeterminate remains of Eosemionotus are known from Spain, Slovenia, and China.[2][5]

The Tethys Ocean appears to have been the center of diversification for the genus. The species E. vogeli appears to descend from a population that dispersed from the Tethys into the Germanic Basin prior to the late Anisian.[2]

See also

• Prehistoric fish
• List of prehistoric bony fish

References

1. Sepkoski, Jack (2002). "A compendium of fossil marine animal genera". Bulletins of American Paleontology. 364: 560. Archived from the original on 2011-07-23. Retrieved 2009-02-27.
2. University~[e-mail], Adriana López-Arbarello~Ludwig Maximilian; Bürgin~Naturmuseum~[e-mail], Toni; Zürich~[e-mail], Heinz Furrer~Paläontologisches Institut und Museum der Universität; Naturale~[e-mail], Rudolf Stockar~Museo cantonale di storia (2019-02-27). "Taxonomy and phylogeny of Eosemionotus Stolley, 1920 (Neopterygii: Ginglymodi) from the Middle Triassic of Europe". Palaeontologia Electronica. Retrieved 2025-01-21.
3. "PBDB Taxon". paleobiodb.org. Retrieved 2025-01-21.
4. "Deinsea 22". www.hetnatuurhistorisch.nl. Retrieved 2025-01-21.
5. Romano, Carlo; Koot, Martha B.; Kogan, Ilja; Brayard, Arnaud; Minikh, Alla V.; Brinkmann, Winand; Bucher, Hugo; Kriwet, Jürgen (2016). "Permian-Triassic Osteichthyes (bony fishes): diversity dynamics and body size evolution". Biological Reviews. 91 (1): 106–147. doi:10.1111/brv.12161. PMID 25431138. S2CID 5332637.