Thornback guitar rays

Thornback guitar rays
Platyrhinoidis triseriata
Systematics
Class : Cartilaginous fish (Chondrichthyes) Subclass : Euselachii Subclass : Plate gill (Elasmobranchii) without rank: Stingray (batoidea) Order : Electric rays (Torpediniformes) Family : Thornback guitar rays
Scientific name
Platyrhinidae
Jordan , 1923

The thornback guitar rays (Platyrhinidae) are a family of rays that occur on the continental shelf on the coast of the northwest (China, Japan and Vietnam) and northeast (California, Mexico) Pacific , as well as in the northeast Indian Ocean ( Andaman Sea ). The fish are sluggish bottom dwellers and are frequent in places.

features

They become half a meter to a meter long. Your body disc is round or heart-shaped, the caudal fin stalk is strong, shark-like and about as long as the body disc. There are two large dorsal fins on the top of the tail fin stalk. The cartilage that supports the rostrum has receded. On the back and on the tail fin stalk there are rows of the eponymous strong thorns, which have developed from placoid scales .

Systematics

The systematic classification of the thorn-back guitar rays was controversial for a long time. While the American ichthyologist Joseph S. Nelson them in his standard work as subordination Platyrhinoidei to the fish systematics stingray-like i.wS counts (Myliobatiformes), they are by other authors as subfamily Platyrhininae into the family of a guitar fish found (Rhinobatidae). According to recent studies, they are the sister group of the four families of the electric ray-like (Torpediniformes) and can therefore be classified neither with the Myliobatiformes nor with the Rhinobatidae. At Fishbase and in the Catalog of Fishes, they have recently been placed in the order of the electric ray-like as the fifth family.

Genera and species

Platyrhina sinensis

There are two genera and five types:

• Platyrhina
  • Platyrhina hyugaensis Iwatsuki, Miyamoto & Nakaya, 2011
  • Platyrhina psomadakisi White & Last, 2016
  • Platyrhina sinensis ( Bloch & Schneider , 1801)
  • Platyrhina tangi Iwatsuki, Zhang & Nakaya, 2011
• Platyrhinoidis
  • Platyrhinoidis triseriata ( Jordan & Gilbert, 1880)

literature

• Joseph S. Nelson : Fishes of the World. 4th edition. John Wiley & Sons, Hoboken NJ et al. 2006, ISBN 0-471-25031-7 .
• Kurt Fiedler: Fish (= textbook of special zoology. Vol. 2: Vertebrates. Part. 2). Gustav Fischer, Jena 1991, ISBN 3-334-00338-8 .

Individual evidence

1. ↑ Neil C. Aschliman, Mutsumi Nishida, Masaki Miya, Jun G. Inoue, Kerri M. Rosana, Gavin JP Naylord: Body plan convergence in the evolution of skates and rays (Chondrichthyes: Batoidea). In: Molecular Phylogenetics and Evolution. Volume 63, No. 1, April 2012, pp. 28-42. doi: 10.1016 / j.ympev.2011.12.012 .
2. ↑ Gaitán-Espitia, JD, Solano-Iguaran, JJ, Tejada-Martinez, D: & Quintero-Galvis, JF (2016): Mitogenomics of electric rays: evolutionary considerations within Torpediniformes (Batoidea; Chondrichthyes). Zoological Journal of the Linnean Society, April 2016. DOI: 10.1111 / zoj.12417
3. ↑ Gavin JP Naylor, Janine N. Caira, Kirsten Jensen, Kerri AM Rosana, Nicolas Straube, Clemens Lakner: Elasmobranch Phylogeny: A Mitochondrial Estimate Based on 595 Species. Page 43 in Jeffrey C. Carrier, John A. Musick, Michael R. Heithaus: Biology of Sharks and Their Relatives (Marine Biology). Publisher: Crc Pr Inc, 2012, ISBN 1-43983-924-7 .
4. ↑ Order Summary for Torpediniformes on Fishbase.org (English)

Web links

Commons : Thornback Guitar Rays (Platyrhinidae)  - Collection of images, videos and audio files

• Thornback Guitar Rays on Fishbase.org (English)