Trisidus

Trisidus
Trisidos tortuosa
Systematics
Subclass : Autolamellibranchiata Subclass : Pteriomorphia Order : Arcida Superfamily : Arcoidea Family : Ark clams (Arcidae) Genre : Trisidus
Scientific name
Trisidus
Röding , 1798

Trisidos kuracheensis Archiac & Haime, 1854, Eocene, Sindh , Pakistan

Trisidos is a shell - genus from the family of ark shells (Arcidae).

features

The unevenly hinged housings are up to 10 cm long. They are oblong rhomboidal in side view. The dorsal margin is straight to very slightly arched (in side view), but twisted to the left. The rotation can be up to about 90 °. The fulcrum is the vertebral region. The front and rear ends of the dorsal margin are each rounded, angled or even pointed.

The dorsal field is narrow. The lock plate is straight to slightly curved. The back teeth get longer towards the edge and tilt more and more outwards. There are almost twice as many teeth in the front area compared to the rear area of ​​the lock plate. The latter also gradually become longer outwards and tilt strongly outwards. The rear edge is straight to slightly curved. The ventral margin is flat, straight to slightly concave.

A keel with a rounded or pointed cross section extends from the vertebra to the posterior end of the dorsal edge. A shallow depression often follows the center of the case inside the keel, which extends from the vertebra to the ventral edge.

The whitish shell is strong, the ornamentation is not very pronounced. It consists of strong growth strips parallel to the edge and radial lines that form a net-like pattern. The periostracum is brownish.

Geographical distribution and habitat

The recent representatives of the genus live in tropical and subtropical waters of the Indian Ocean (including the Red Sea) and the western Pacific, here in the north to central Japan and in the south to Australia. In the Oligocene, species of the genus occurred in the Paratethys , and in the Neogene in the Aquitaine Basin .

Today's species live in muddy, muddy-sandy or fine-sandy soils with a lot of shell breakage in shallow water up to a depth of about 35 meters.

Taxonomy

The genre was established in 1798 by Peter Friedrich Röding . Type species by monotype is Arca tortuosa Linnaeus, 1758. synonyms are Epitrisis Iredale, 1939 Parallelepipedum Mörch, 1850 Parallepipedum Jousseaume, 1888 (unjustified emendation of Parallelepipedum ) and Trisis Blainville, 1825th

• Genus Trisidos Röding, 1798
  • † Trisidos bellunensis (Oppenheim, 1903) ( Oligocene )
  • † Trisidos caheni (Freneix, 1979) ( Lutetium )
  • † Trisidos fajumensis (Oppenheim, 1906) (Upper Eocene)
  • † Trisidos forojuliensis Lombardini, 1920 (Oligocene)
  • † Trisidos grateloupi (Mayer, 1868) (Oligocene) (syn .: Trisidos levequei Magne & Saubade 1974)
  • † Trisidos isseli (Rovereto, 1898) (Oligocene)
  • † Trisidos italicus (Sacco, 1898) (Oligocene)
  • Trisidos kiyonoi (Makiyama, 1931)
  • † Trisidos kurracheensis (d'Archiac & Haime, 1854) (Eocene)
  • † Trisidos prototortuosum (Noetling, 1901)
  • † Trisidos schafarziki (Horusitzky, 1927) ( Egerian , Oligocene / Miocene border area)
  • † Trisidos semitorta (Lamarck, 1819) (Oligocene)
  • Trisidos torta (Mörch, 1850)
  • Trisidos tortuosa (Linnaeus, 1758)
  • † Trisidos yatsuoensis Fujii, 1961 (Miocene)

According to the molecular biological investigations by David Combosch and Gonzalo Giribet, the two Trisidos species investigated come to lie in the middle of the genus Barbatia . The genus Barbatia is probably polyphyletic to the current extent.

supporting documents

literature

• Norman D. Newell: Trisidos Röding, 1798. In: Raymond Cecil Moore (Ed.): Treatise on invertebrate paleontology. Mollusca, 6, Bivalvia 1. XXXVIII, S.N254, New York, 1969.
• Philip W. Reinhart: Classification of the Pelecypod Family Arcidae. Bulletin du Musée royal d'Histoire naturelle de Belgique, 11 (13): 1–68, Brussels 1935 PDF
• Michael JS Tevesz, Joseph G. Carter: Form and function in Trisidos (Bivalvia) and a comparison with other burrowing arcoids. Malacologia, 19: 77-85, 1979 Online at www.biodiversitylibrary.org .

Individual evidence

1. ^ ^{A b} Peter Friedrich Röding: Museum Boltenianum, sive, Catalogus cimeliorum e tribus regnis naturae quae olim collegerat Joa. Fried. Bolten. 199 p., Hamburg 1798 Online at www.biodiversitylibrary.org (p. 175)
2. ^ Otto Andreas Lowson Mørch : Catalogus conchyliorum quae reliquit CP Kierulf, MD. DR. Nunc publica auctione X decembris MDCCCL Hafniae dividenda. Online at www.biodiversitylibrary.org (p. 25)
3. ↑ ^{a b c d e} MolluscaBase: Trisidos Röding, 1798
4. ↑ Suzanne Freneix: Bivalves you Paleocene Eocene et de l'de l'Angola du et Zaire. Annales Musée Royal de l'Afrique Centrale, Tervuren, Sciences géologiques, 86: 128-170, Tervuren 1979.
5. ^ Paul Oppenheim: On the knowledge of ancient tertiary fauna in Egypt. 2nd delivery: The bivalve second part, Gastropoda and Cephalopoda. Palaeontographica, 30 (3): 163-348, 1906 (pp. 212-214).
6. ^ G. Lombardini: Sopra il nuova lembo oligocenico d'Osoppo nel Friuli. Rivista Italiana di Paleontologia, 26: 18-41, Parma 1920.
7. ^ A. Magne, AM Saubade: Sur un Trisidos nouveau de la region aturienne. Bulletin de la Société de Borda, 355: 381-384, Dax 1979.
8. ↑ ^{a b} Bruno Cahuzac, Jacques Alvinerie, Alain Cluzaud, Jean-François Lesport: Les Trisidos (Bivalvia, Arcidae) du Chattien du Bassin de l'Adour (Aquitaine, France). Systématique, intérêt paleoécologique et paleobiogéographique. Géobios, 14: 87-96, Lyon 1992 ResearchGate
9. ^ Maria Cristina Bonci, Davide Dagnino, Aaron Mazzini, Michele Piazza: The mollusk type material of Gaetano Rovereto in the “BTP Collection” (Museo di Paleontologia - DISTAV - Università di Genova): history of the Collection and the Oligocene bivalve types from the Pareto area. Bollettino della Società Paleontologica Italiana, 53 (3), 2014, 163-177. Modena PDF (ResearchGate)
10. ↑ Federico Sacco : I Molluschi dei Terreni Terziarii del Piemonte e della Liguria , pt. 26, Turin, 1898 Online at www.biodiversitylibrary.org (p. 27) plate 6, Fig. 6 .
11. ↑ About the overturning of S. Orso, the Tertiary of the Tretto and fauna and the position of the ski layers. Journal of the German Geological Society, 55: 98 - **, Berlin 1903. Online at www.archive.org (p. 177)
12. ↑ Etienne Jules Adolphe DESMIER vicomte d'Archiac, Jules Haime: Description of animaux fossiles du groupe nummulitique de l'Inde. Gide (Paris) J. Baudry (Paris) 1854 Online at BnF Gallica (p. 263) [Taf. 20, Fig. 4a, b]
13. ^ Fritz Noetling: Fauna of the Miocene Beds of Burma. Mem.Geol. Survey, India, Palaeont, Indica, New Series, 1: 1-378, Calcutta 1901 Online at www.archive.org (p. 152)
14. ↑ Tamás Báldi: Mollusc Fauna of the Hungarian Upper Oligocene, (Egerian): Studies in Stratigraphy, Palaeoecology, Palaeogeography, and Systematics. 511 pp., Akadémiai Kiadó, Budapest 1973
15. ↑ Shoji Fujii: On some Miocene arcid fossils from Japan. Part 1. Trisidos yatsuoensis n. Sp. Venus, 21 (2): 217-222, 1961.
16. ↑ David J. Combosch, Gonzalo Giribet: Clarifying phylogenetic relationships and the evolutionary history of the bivalve or Arcida (Mollusca: Bivalvia: Pteriomorphia). Molecular Phylogenetics and Evolution, 94: 298-312, 2016, doi : 10.1016 / j.ympev.2015.09.016 , PDF