Cow nosed rays

Cow nosed rays
Golden ray ( Rhinoptera steindachneri )
Systematics
Subclass : Euselachii Subclass : Plate gill (Elasmobranchii) without rank: Stingray (batoidea) Order : Myliobatiformes Family : Rhinopteridae Genre : Cow nosed rays
Scientific name of the  family
Rhinopteridae
Jordan & Evermann , 1896
Scientific name of the  genus
Rhinoptera
Jordan & Evermann, 1896

The rhinoptera ( Rhinoptera ) or Kuhkopfrochen live pelagic in tropical and sub-tropical regions of the Atlantic and Indo-Pacific . With the exception of the special head shape, they resemble the eagle rays , to which they also belonged. Recently, they have been increasingly classified as a separate family.

Cow-nosed rays are 86 centimeters to 2.15 meters long , depending on the species . The characteristic feature of the genus is the indented (concave) head.

The swimming-happy animals are diurnal and live socially, sometimes in large schools with hundreds of specimens. From Rhinoptera bonasus one has seen flocks of 10,000 rays. Like many rays, cow nosed rays are ovoviviparous . The young rays are often born in mangroves .

Javanese cow nosed ray

species

• Rhinoptera adspersa
• Atlantic cow nosed ray ( Rhinoptera bonasus )
• Rhinoptera brasiliensis
• Javanese cow nosed ray ( Rhinoptera javanica )
• Rhinoptera jayakari
• Common cow nosed ray ( Rhinoptera marginata )
• Rhinoptera neglecta
• Golden ray ( Rhinoptera steindachneri )

Cow-nosed rays are often shown in large show aquariums . In Europe show u. a. the L'Oceanogràfic in Valencia, the Meereszentrum Fehmarn , the Sealife -Aquarium Munich, the Aquarium of the Zoological Garden Berlin , the Aquarium Wilhelmshaven and the London Aquarium Kuhnasenray.

literature

• Joseph S. Nelson : Fishes of the world , Fourth Edition, Wiley & Sons, Hoboken 2006, ISBN 978-0-471-25031-9 .

Web links

Commons : Cow-nosed Ray ( Rhinoptera )  - Collection of images, videos and audio files

• Cow-nosed rays on Fishbase.org (English)

Individual evidence

1. ↑ Gavin JP Naylor, Janine N. Caira, Kirsten Jensen, Kerri AM Rosana, Nicolas Straube, Clemens Lakner: Elasmobranch Phylogeny: A Mitochondrial Estimate Based on 595 Species. Pages 39 to 40 in Jeffrey C. Carrier, John A. Musick, Michael R. Heithaus: Biology of Sharks and Their Relatives (Marine Biology). Publisher: Crc Pr Inc, 2012, ISBN 1-4398-3924-7 .
2. ↑ White, WT & Naylor, GJP (2016): Resurrection of the family Aetobatidae (Myliobatiformes) for the pelagic eagle rays, genus Aetobatus. Zootaxa , 4139 (3): 435-438. doi: 10.11646 / zootaxa.4139.3.10