Microdevario

Microdevario
	Microdevario kubotai
Systematics
without rank:	Otophysa
Order :	Carp-like (Cypriniformes)
Subordination :	Carp fish-like (Cyprinoidei)
Family :	Bärblings (Danionidae)
Subfamily :	Danioninae
Genre :	Microdevario
Scientific name
	Microdevario
	Fang , Norén , Liao , Källersjö & Kullander , 2009

Microdevario is a three types comprehensive genus very small danios (Danioninae) from the mainland Southeast Asia . It occurs in Thailand and Burma . The genus name is made up of "mikros" ( size : small) and the name of the closely related genus Devario .

features

The Microdevario species only reach body lengths of 15 to 23 mm, are partially transparent, with a yellowish or greenish shimmer and yellow or silvery belly and transparent fins. The pectoral fins are sickle-shaped. A characteristic feature of the genus is a semicircular depression on the parasphenoid that does not occur in any other genus of the Danionini tribe and is also rare in other carp fish. A double instead of a single ligament between the premaxillary and the kinethmoid, a typical carp-like bone, they share with Chela , Laubuca and Devario and show their close relationship to these genera. Microdevario differs from the three genera by the lack of a groove on the supraorbitalia, a skull bone, and the concave outer edge of the dorsal and anal fin. From Microrasbora , another Bärblingsgattung with dwarfism, differs Microdevario by numerous features of the skull anatomy.

Other features, but not autapomorphies , are the absence of barbels , the absence of perforated scales for the lateral line organ, and the lower number of trunk vertebrae compared to the caudal vertebrae.

Scale formula : mLR 24–26 + 1–2, 10–13 scales in front of the dorsal fin.
Fin formula : Dorsal : 2–3 / 7–8; Anal : 3 / 9–13, ventral : 6–7, caudal : 10 + 9 main rays, 9 + 8 branched rays.

Systematics

Microdevario belongs to the Danionini tribe and is closely related to Devario , Chela and Laubuca . The systematic position of the genus Microdevario shows the following cladogram :

The large Devario species e.g. B. the malabar fish ( Devario aequipinnatus ), are close relatives of the tiny genus Microdevario

Tribe Danionini

Devario

	Chela

	Laubuca

Microdevario

Danio

Esomus

species

Microdevario gatesi Herre , 1939
Microdevario kubotai ( Kottelat & Witte , 1999) ( type species )
Microdevario nana (Kottelat & Witte, 1999)

literature

Fang, F., M. Norén, T.-Y. Liao, M. Källersjö & SO Kullander 2009: Molecular phylogenetic interrelationships of the south Asian cyprinid genera Danio, Devario and Microrasbora (Teleostei, Cyprinidae, Danioninae). Zoologica scripta v. 38 (no. 3): 237-256. doi : 10.1111 / j.1463-6409.2008.00373.x .

Web links

Commons : Microdevario - collection of pictures, videos and audio files

Microdevario on Fishbase.org (English)