Biology:Ticinepomis

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Short description: Extinct genus of coelacanths

Ticinepomis
Temporal range: Lower Ladinian, 240.91 Ma
Ticinepomis peyeri.JPG
Fossil
Ticinepomis peyeri reconstruction.jpg
Reconstruction
Scientific classification e
Domain: Eukaryota
Kingdom: Animalia
Phylum: Chordata
Clade: Sarcopterygii
Class: Actinistia
Order: Coelacanthiformes
Family: Latimeriidae
Genus: Ticinepomis
Rieppel, 1980
Type species
Ticinepomis peyeri
Rieppel, 1980
Other species
  • T. ducanensis Ferrante, Furrer, Martini et Cavin, 2023

thumb|left|Marine life of the [[Early Triassic|Early and early Middle Triassic: Ticinepomis (13)[1]]] Ticinepomis is an extinct genus of coelacanth lobe-finned fish which lived during the Middle Triassic period in what is now Switzerland . It contains two species, T. peyeri and T. ducanensis.[2]

Specimens of the species T. peyeri, which was named after Bernhard Peyer, are most common in the Besano Formation (or Grenzbitumenzone) of Monte San Giorgio in canton Ticino.[3] Other coelacanths from Monte San Giorgio include a larger species (tentatively referred to Holophagus picenus) from the Besano Formation,[4] and a species of Heptanema from the Meride Limestone.[5]

Larger Ticinepomis specimens have been found in the Prosanto Formation of canton Graubünden, originally referred to as Ticinepomis cf. T. peyeri.[6] A revision showed that this material belongs to a new species, T. ducanensis, remains of which were also discovered in the Besano Formation of canton Ticino.[2] The Prosanto Formation also produced the unusual coelacanths Foreyia and Rieppelia.

Classification

Ticinepomis was originally described as being a member of the family Coelacanthidae, being similar to Coelacanthus, Holophagus and Undina.[3] Later, T. peyeri was placed in Latimeriidae.[6] The bizarre Prosanto Formation latimeriid Foreyia is thought to be T. peyeri's closest relative, as they share many features despite their drastically contrasting appearances.[7]

References

  1. Scheyer, Torsten M.; Romano, Carlo; Jenks, Jim; Bucher, Hugo (2014). "Early Triassic Marine Biotic Recovery: The Predators' Perspective"". PLOS ONE 9 (3): e88987. doi:10.1371/journal.pone.0088987. PMID 24647136. Bibcode2014PLoSO...988987S. 
  2. 2.0 2.1 Ferrante, Christophe; Furrer, Heinz; Martini, Rossana; Cavin, Lionel (2023). "Revision of the Middle Triassic coelacanth Ticinepomis Rieppel 1980 (Actinistia, Latimeriidae) with paleobiological and paleoecological considerations". Swiss Journal of Palaeontology 142 (18): 18. doi:10.1186/s13358-023-00276-4. PMID 37706074. 
  3. 3.0 3.1 Rieppel, O. (1980). "A new coelacanth from the Middle Triassic of Monte San Giorgio, Switzerland". Eclogae Geologicae Helvetiae 73 (3): 921–939. https://www.e-periodica.ch/cntmng?pid=egh-001:1980:73::1251. 
  4. Rieppel, Olivier (1985). "A second actinistian from the Middle Triassic of Monte San Giorgio, Kanton Tessin, Switzerland". Eclogae Geologicae Helvetiae 78: 707–713. doi:10.5169/seals-165676. https://www.e-periodica.ch/cntmng?pid=egh-001:1985:78::1027. 
  5. Renesto, Silvio; Stockar, Rudolf (2018). "FIRST RECORD OF A COELACANTH FISH FROM THE MIDDLE TRIASSIC MERIDE LIMESTONE OF MONTE SAN GIORGIO (CANTON TICINO, SWITZERLAND)" (in en). Rivista Italiana di Paleontologia e Stratigrafia 124 (3). doi:10.13130/2039-4942/10771. ISSN 2039-4942. https://core.ac.uk/download/pdf/296282505.pdf. 
  6. 6.0 6.1 Cavin, Lionel; Furrer, H.; Obrist, C. (2013). "New coelacanth material from the Middle Triassic of eastern Switzerland, and comments on the taxic diversity of actinistans". Swiss Journal of Geosciences 106 (2): 161–177. doi:10.1007/s00015-013-0143-7. 
  7. Cavin, L.; Mennecart, B.; Obrist, C.; Costeur, L.; Furrer, H. (2017). "Heterochronic evolution explains novel body shape in a Triassic coelacanth from Switzerland". Scientific Reports 7 (1): 13695. doi:10.1038/s41598-017-13796-0. PMID 29057913. Bibcode2017NatSR...713695C. 

Wikidata ☰ Q3991177 entry