Ritidae

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Ritidae
Rita rita

Rita rita

Systematics
Overcohort : Clupeocephala
Cohort : Otomorpha
Sub-cohort : Ostariophysi
Otophysa
Order : Catfish (Siluriformes)
Family : Ritidae
Scientific name
Ritidae
Ng , 2003

The Ritidae are a family of South and Southeast Asian catfish with 13 species that are divided into two genera, namely Rita and Nanobagrus . The taxon only got the family status in 2016 in the 5th edition of Fishes of the World , a standard work on fish systematics, and was previously considered a subfamily of the spiny catfish (Bagridae). The spiny catfish belong to a group of closely related Asian catfish families called "Big Asia", while the Ritidae may be the coral catfish(Plotosidae) that do not belong to the “Big Asia” group. The Ritidae occur in South Asia, Indochina , Borneo and Sumatra .

features

The species of the genus Rita are medium-sized to very large catfish that can be 20 cm to 2 meters long. The spines of its pectoral and dorsal fin are large and well developed, and the eyes are dorsolateral. The species of the genus Nanobagrus remain very small with lengths of 3 to 5 cm. In both genera the anal fin is short and the caudal fin is forked. The pelvic fins have 7 to 8 fin rays, the anus and genital opening are close together, the posterior extension of the shoulder girdle is rudimentary. In the spiny catfish, on the other hand, the pelvic fins have 6 fin rays, the anus and genital opening are not close together, and the posterior extension of the shoulder girdle is well developed.

Genera and species

literature