Amarsipus carlsbergi

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Amarsipus carlsbergi
Systematics
Spinefish (Acanthopterygii)
Perch relatives (Percomorphaceae)
Order : Scombriformes
Family : Amarsipidae
Genre : Amarsipus
Type : Amarsipus carlsbergi
Scientific name of the  family
Amarsipidae
Haedrich , 1969
Scientific name of the  genus
Amarsipus
Haedrich, 1969
Scientific name of the  species
Amarsipus carlsbergi
Haedrich, 1969

Amarsipus carlsbergi is the only species of the Amarsipidae family from the order of the Scombriformes . The generic name Amarsipus indicates the lack of throat sacs ( Gr .: Ἀμάρσιπος "a" = without; "marsipos" = sack). The species epithet was given in honor of the Carlsberg Foundation , in whose journal Dana Reports the description appeared.

features

The characteristic difference to the other "Stromateoids" lies in the absence of the pharynx sac. It is unclear whether this deficiency is primitive or derived. As with some other "stromateoids", fully grown animals are still unknown; H. you don't know how big they will be. He recognized that the juvenile fish described by Richard Haedrich in 1969 belong to the “stromateoids” from their skin (mucus) canal system, the pores of which are scattered all over the body. The jaw teeth stand in a row, are small and curved inward. There are only 3 or 4 on the vomer , those on the palatine are tiny. The gill spines (19-22 on the first arch) are quite long, strong and flattened. There are six Branchiostegal radii each.

Fin formula : D1 IX-XII, D2 22-27, A (I?) / 27-32, C 17 (-18). The caudal fin is stiff and deeply forked. The pectoral fins are rounded and deflected far ventrally , the pelvic fins small, throat-set in juvenile fish, later on the chest. The sideline is only developed in the tail section. The small round scales are quite easy. Only the gill cover is scaled on the head . There are 46–48 vertebrae.

The shape is elongated (similar to that of the Tetragonuridae , with a lower first dorsal fin). The brown, still somewhat translucent juvenile fish are quite common in the epipelagic of the tropical Indian and Pacific Oceans. The largest specimen to date (212 mm long) was caught at night in 1988 at a maximum depth of 130 m. Nothing is known about the biology of fish.

literature

Individual evidence

  1. ↑ Ryu Doiuchi, Tomoyasu Sato, Tetsuji Nakabo: Phylogenetic relationships of the stromateoid fishes (Perciformes). In: Ichthyological Research. Vol. 51, No. 3, 2004, ISSN  1341-8998 , pp. 202-212, doi : 10.1007 / s10228-004-0216-8 .

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