Dinematichthyidae

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Dinematichthyidae
Ogilbia sabaji

Ogilbia sabaji

Systematics
Acanthomorphata
Spinefish (Acanthopterygii)
Perch relatives (Percomorphaceae)
Order : Viscera (Ophidiiformes)
Subordination : Bythitoidei
Family : Dinematichthyidae
Scientific name
Dinematichthyidae
Whitley , 1926

The Dinematichthyidae are bony fish (Osteichthyes) from the order of the intestinal fish-like (Ophidiiformes). The family wasn't introduced until April 2016. Before that, the species of the family formed the tribe Dinematichthyini, within the livebearers Brotulas (Bythitidae). Most of the species in the family live tucked away in reefs, and a few live in fresh water. The freshwater species often inhabit cave systems such as Typhliasina pearsei on the Yucatán Peninsula and Ogilbia galapagosensis on the Galapagos Island of Santa Cruz .

features

The species of Dinematichthyidae reach standard lengths of 22 cm to almost two meters. Like all gut fish-like, they are elongated. The number of vertebrae is 36 to 87, of which 10 to 25 are trunk vertebrae and 25 to 65 are tail vertebrae. The dorsal and anal fins are long. The caudal fin is free and has not grown together with the dorsal and anal fin to form a continuous fin edge. The first fin support of the anal fin is more or less elongated.

The sensory pores on the head are usually not reduced. There are 6 pores on the lower jaw, 2 to 4 on the preoperculum , 5 to 7 on the infraorbitalia (eye ring bones) and 3 to 4 on the supraorbitalia (skull bones above the eyes). The rearmost supraorbital pore is tubular. The fish have up to seven extended gill rakes . The male's reproductive organ, which consists of a penis-like organ and one to two (less often three) pairs of pseudoclases , lies in a fold of the skin of the abdomen and is covered by a fleshy hood, is a diagnostic feature of the family .

Genera and species

A total of 25 genera with 114 species belong to the Dinematichthyidae. Many of these species have only been described in recent years .

literature

  • Peter Rask Møller, Steen Wilhelm Knudsen, Werner Schwarzhans, Jørgen G. Nielsen: A new classification of viviparous brotulas (Bythitidae) - with the establishment of a new family Dinematichthyidae - based on molecular, morphological and fossil data. Molecular Phylogenetics and Evolution, April 2016, doi: 10.1016 / j.ympev.2016.04.008