Short nose chimeras

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Short nose chimeras
Hydrolagus colliei

Hydrolagus colliei

Systematics
Superclass : Jaw mouths (Gnathostomata)
Class : Cartilaginous fish (Chondrichthyes)
Subclass : Holocephali
Superordinate : Holocephalimorpha
Order : Sea cats (Chimaeriformes)
Family : Short nose chimeras
Scientific name
Chimaeridae
Bonaparte , 1831

The short-nosed chimeras (Chimaeridae) are a family in the order of the sea ​​cats (Chimaeriformes) within the cartilaginous fish (Chondrichthyes).

features

The fish are 40 to 150 centimeters long. In contrast to the two other families of the sea ​​cats (Chimaeriformes), their snout is short and rounded or conical. The lateral line organ has open pores and extends to the head as well.

The approximately 44 species belong to the two genera Chimaera and Hydrolagus . In Hydrolagus the anal and diphycerke caudal fin have grown together to form a fin edge, while in Chimaera they are separate. In both genera, the first dorsal fin is high and is protected by a spike in front, the second dorsal fin is low and elongated in a fringe. The sting is connected to a poison gland. A sting leads to painful wounds in humans.

The egg capsules of the short nose chimeras are spindle-shaped, relatively small, typically 17 × 2.5 cm in size. They have a dorsal keel.

distribution

Short-nosed chimeras live in temperate and tropical areas in the Atlantic , Pacific and Indian Oceans , mostly at depths below 200 meters. The only species in European waters is the sea ​​cat ( Chimaera monstrosa ).

Genera and species

Sea cat ( Chimaera monstrosa )
Hydrolagus affinis
Hydrolagus mirabilis
Hydrolagus pallidus

Tribal history

The family has been proven in fossil records since the early Cretaceous (genus Belgorodon ). The genus Chimaera is known fossil from the Upper Cretaceous and the Eocene of the Antarctic .

literature

Web links

Commons : Short Nose Chimera  - collection of images, videos and audio files

Individual evidence

  1. Eighty-first amendment to the announcement on trade names for fishery and aquaculture products from July 8, 2016 ( BAnz AT 07/21/2016 B5 )