Aetobatus

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Aetobatus
Aetobatus ocellatus

Aetobatus ocellatus

Systematics
Subclass : Euselachii
Subclass : Plate gill (Elasmobranchii)
without rank: Stingray (batoidea)
Order : Myliobatiformes
Family : Aetobatidae
Genre : Aetobatus
Scientific name of the  family
Aetobatidae
Agassiz , 1858
Scientific name of the  genus
Aetobatus
Blainville , 1816

Aetobatus (English: pelagic eagle rays) is a four species of ray genus from the order of the stingray (Myliobatiformes). The fish are found in all tropical and subtropical seas around the world.

features

Aetobatus species are large to very large rays. Their rhombic body disc, together with the wing-like pectoral fins, can reach a width of three meters. The actual trunk is strong and thick; the head is narrow and clearly protruding. The eyes sit on the side of the head, the injection holes behind them dorsolaterally. They are always clearly visible from above. The mouth on the underside of the head is broad and surrounded by large fields of sensory pores and papillae. In both jaws, the teeth are arranged in a single row. In the upper jaw the tooth plate is wider than it is long, in the lower jaw it is longer than it is wide. The lower jaw teeth are angular. The nasal skin is clearly indented. The front edge of the broad pectoral fins is at eye level. Their outer ends are narrowly rounded, almost pointed, the rear ends are broadly rounded. Shortly in front of the narrow base of the tail but in front of the rear end of the pelvic fins there is a small dorsal fin. One or more conspicuous spines can be found directly behind the dorsal fin. The tail is whip-like and longer than the body disc.

species

Systematics

Aetobatus was introduced as a subgenus of Raia in 1816 by the French zoologist Henri Marie Ducrotay de Blainville . Aetobatus later became a separate genus and was classified in the Myliobatidae family. Recent molecular and morphological studies come to the conclusion that the genus Aetobatus differs so strongly from Aetomylaeus and Myliobatis , the other two genera of the Myliobatidae ie S., that it can be classified in an independent family. The name Aetobatidae is used for this purpose, which was introduced in 1858 by the American ichthyologist Louis Agassiz as the subfamily Aëtobatinae and corrected to Aetobatinae by Gill in 1865.

literature

Individual evidence

  1. ↑ Agassiz, L. (1858) A new species of skate from the Sandwich Islands . Proceedings of the Boston Society of Natural History, 6 (1856-1859), 385.

Web links

Commons : Aetobatus  - collection of images, videos and audio files