Macrosemiiformes

Macrosemiidae

Macrosemiidae

Extinct order of fishes

Macrosemiidae is an extinct family of ginglymodian fish. The family first appeared during the Middle Triassic[1] and disappeared during the Late Cretaceous. The group has been found in rock formations in Africa, Australia, Eurasia and North America.[2] As ginglymodians, their closest living relatives are gars, with them being typically placed as nested within the Semionotiformes.[3] Many members of the family have elongated dorsal fins, often associated with adjacent area of skin which was free of scales. These fins were likely undulated for use in precision swimming. Their body morphology suggests that they were slow swimmers that were capable of maneuvering around complex topography, such as reef environments.[4]

Quick Facts Macrosemiidae Temporal range: Late Triassic - Late Cretaceous, Scientific classification ...
Fin shape diversity within Macrosemiiformes A. Propterus microstomus; B. Notagogus denticulatus; C. Legnonotus krambergeri; D. Macrosemius rostratus; E. Enchelyolepis andrewsi F. Enchelyolepis pectoralis G. Uarbryichthys latus H. Voelklichthys comitatus. Pectoral fins are shown in yellow; pelvic fins in orange; dorsal fins in red; and anal fins in green.

Taxonomy

Timeline of genera

CretaceousJurassicTriassicLate CretaceousEarly CretaceousLate JurassicMiddle JurassicEarly JurassicLate TriassicMiddle TriassicEarly TriassicPetalopteryxEnchelyolepisNotagogusPropterusHistionotusMacrosemiusLegnonotusOphiopsisCretaceousJurassicTriassicLate CretaceousEarly CretaceousLate JurassicMiddle JurassicEarly JurassicLate TriassicMiddle TriassicEarly Triassic

References

Wikimedia Commons has media related to Macrosemiiformes.
  1. [1]
    López-Arbarello, Adriana; Bürgin, Toni; Furrer, Heinz; Stockar, Rudolf (2019-02-27). "Taxonomy and phylogeny of Eosemionotus Stolley, 1920 (Neopterygii: Ginglymodi) from the Middle Triassic of Europe". Palaeontologia Electronica. 22 (1): 1–64. doi:10.26879/904. ISSN 1094-8074.
  2. [2]
    "Macrosemiiformes". Palaeos vertebrates. Archived from the original on 29 August 2010. Retrieved 20 August 2009.
  3. [3]
    López-Arbarello, Adriana; Bürgin, Toni; Furrer, Heinz; Stockar, Rudolf (2019). "Taxonomy and phylogeny of Eosemionotus Stolley, 1920 (Neopterygii: Ginglymodi) from the Middle Triassic of Europe". Palaeontologia Electronica. doi:10.26879/904.
  4. [4]
    Cawley, John J.; Marramà, Giuseppe; Carnevale, Giorgio; Villafaña, Jaime A.; López‐Romero, Faviel A.; Kriwet, Jürgen (February 2021). "Rise and fall of †Pycnodontiformes: Diversity, competition and extinction of a successful fish clade". Ecology and Evolution. 11 (4): 1769–1796. doi:10.1002/ece3.7168. ISSN 2045-7758. PMC 7882952. PMID 33614003.
  5. [5]
    Arratia, G.; Schultze, H.-P. (2012-01-01). "The macrosemiiform fish companion of the Late Jurassic theropod Juravenator from Schamhaupten, Bavaria, Germany". Fossil Record. 15 (1): 5–25. doi:10.5194/fr-15-5-2012. ISSN 2193-0074.
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