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Masillosteus

Masillosteus ("bony one from Messel") is an extinct genus of gar that inhabited western North America and Europe during the Eocene. It is known from two species, each from a famous freshwater lagerstätte: M. kelleri from the Messel pit in the Messel Formation of Germany, and M. janeae from Fossil Butte in the Green River Formation of Wyoming.[1][2] They are known from only a few specimens from both localities, and may have not been permanent inhabitants of the fossil lakes where they were preserved.[3][4]

Masillosteus
Temporal range: Early Eocene
M. janeae specimen at the Field Museum
Scientific classification
Domain: Eukaryota
Kingdom: Animalia
Phylum: Chordata
Class: Actinopterygii
Clade: Ginglymodi
Order: Lepisosteiformes
Family: Lepisosteidae
Genus: Masillosteus
Micklich & Kappert, 2001
Species
  • Masillosteus janeae Grande, 2010
  • Masillosteus kelleri Micklich & Kappert, 2001

Masillosteus was an atypical gar with a short, broad snout and molariform teeth likely adapted to crushing crustaceans and other hard-shelled invertebrate prey.[1] It shares the short, broad snout with the extinct gar Cuneatus, which inhabited western North America during the same time period; both genera are classified in the tribe Cuneatini. Although fossils of both genera are known only from the Paleogene, it is assumed that both diverged from one another during the Cretaceous.[5]

References edit

  1. ^ a b Micklich, N.; Klappert, G. (2001). "Masillosteus kelleri, a new gar (Actinopterygii, Lepisosteidae) from the middle Eocene of Grube Messel (Hessen, Germany)". Kaupia. 11: 73–81.
  2. ^ Grande, Lance (2010). "An Empirical Synthetic Pattern Study of Gars (lepisosteiformes) and Closely Related Species, Based Mostly on Skeletal Anatomy. the Resurrection of Holostei". Copeia. 2010 (2A): iii–871. ISSN 0045-8511.
  3. ^ Micklich, Norbert (1 December 2012). "Peculiarities of the Messel fish fauna and their palaeoecological implications: a case study". Palaeobiodiversity and Palaeoenvironments. 92 (4): 585–629. doi:10.1007/s12549-012-0106-4. ISSN 1867-1608.
  4. ^ de Mazancourt, Valentin; Wappler, Torsten; Wedmann, Sonja (27 October 2022). "Exceptional preservation of internal organs in a new fossil species of freshwater shrimp (Caridea: Palaemonoidea) from the Eocene of Messel (Germany)". Scientific Reports. 12 (1): 18114. doi:10.1038/s41598-022-23125-9. ISSN 2045-2322.
  5. ^ Brownstein, Chase Doran; Yang, Liandong; Friedman, Matt; Near, Thomas J. (20 December 2022). "Phylogenomics of the Ancient and Species-Depauperate Gars Tracks 150 Million Years of Continental Fragmentation in the Northern Hemisphere". Systematic Biology. 72 (1): 213–227. Retrieved 5 June 2023.

masillosteus, bony, from, messel, extinct, genus, that, inhabited, western, north, america, europe, during, eocene, known, from, species, each, from, famous, freshwater, lagerstätte, kelleri, from, messel, messel, formation, germany, janeae, from, fossil, butt. Masillosteus bony one from Messel is an extinct genus of gar that inhabited western North America and Europe during the Eocene It is known from two species each from a famous freshwater lagerstatte M kelleri from the Messel pit in the Messel Formation of Germany and M janeae from Fossil Butte in the Green River Formation of Wyoming 1 2 They are known from only a few specimens from both localities and may have not been permanent inhabitants of the fossil lakes where they were preserved 3 4 MasillosteusTemporal range Early Eocene PreꞒ Ꞓ O S D C P T J K Pg N M janeae specimen at the Field Museum Scientific classification Domain Eukaryota Kingdom Animalia Phylum Chordata Class Actinopterygii Clade Ginglymodi Order Lepisosteiformes Family Lepisosteidae Genus MasillosteusMicklich amp Kappert 2001 Species Masillosteus janeae Grande 2010 Masillosteus kelleri Micklich amp Kappert 2001 Masillosteus was an atypical gar with a short broad snout and molariform teeth likely adapted to crushing crustaceans and other hard shelled invertebrate prey 1 It shares the short broad snout with the extinct gar Cuneatus which inhabited western North America during the same time period both genera are classified in the tribe Cuneatini Although fossils of both genera are known only from the Paleogene it is assumed that both diverged from one another during the Cretaceous 5 References edit a b Micklich N Klappert G 2001 Masillosteus kelleri a new gar Actinopterygii Lepisosteidae from the middle Eocene of Grube Messel Hessen Germany Kaupia 11 73 81 Grande Lance 2010 An Empirical Synthetic Pattern Study of Gars lepisosteiformes and Closely Related Species Based Mostly on Skeletal Anatomy the Resurrection of Holostei Copeia 2010 2A iii 871 ISSN 0045 8511 Micklich Norbert 1 December 2012 Peculiarities of the Messel fish fauna and their palaeoecological implications a case study Palaeobiodiversity and Palaeoenvironments 92 4 585 629 doi 10 1007 s12549 012 0106 4 ISSN 1867 1608 de Mazancourt Valentin Wappler Torsten Wedmann Sonja 27 October 2022 Exceptional preservation of internal organs in a new fossil species of freshwater shrimp Caridea Palaemonoidea from the Eocene of Messel Germany Scientific Reports 12 1 18114 doi 10 1038 s41598 022 23125 9 ISSN 2045 2322 Brownstein Chase Doran Yang Liandong Friedman Matt Near Thomas J 20 December 2022 Phylogenomics of the Ancient and Species Depauperate Gars Tracks 150 Million Years of Continental Fragmentation in the Northern Hemisphere Systematic Biology 72 1 213 227 Retrieved 5 June 2023 Retrieved from https en wikipedia org w index php title Masillosteus amp oldid 1211832218, wikipedia, wiki, book, books, library,

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