Eviota

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Eviota
Eviota albolineata

Eviota albolineata

Systematics
Acanthomorphata
Spinefish (Acanthopterygii)
Perch relatives (Percomorphaceae)
Order : Gobies (Gobiiformes)
Family : Gobies (Gobiidae)
Genre : Eviota
Scientific name
Eviota
Jenkins , 1903

Eviota ( synonyms : Allogobiui Waite, 1904 & Eviotops J.LB Smith, 1956 ) is a genus of very small sea ​​gobies found in the Red Sea and the tropical Indo-Pacific north to Japan, east to Hawaii , the Tuamotu Archipelago , the Norfolk Island and southoccursto Lord Howe Island . The main area of ​​distribution is the coral triangle where numerous endemic species as well as cryptic , previously undescribed species are suspected.

features

Eviota species are very small and reach lengths of 13 to 40 mm. Most are sexually mature at a length of less than 20 mm, the females of the smallest species at a length of 9 mm. The head is rounded, the body elongated with typically 25 or 26 vertebrae. The jaws are set with small, pointed teeth, some of which are enlarged in front. The rays of the pectoral fins can be branched or unbranched. The pelvic fins do not form a suction disk, are separated and only connected at the base by a thin membrane. They have a hard ray and four to five soft rays, the fifth, if present, is simple and unbranched or just a small rudiment, the fourth is multiply branched. The first dorsal fin has six hard rays, one or more of which are filamentously elongated in the males of many species (in some species also in the females). The body is covered by relatively large comb scales. There are fewer than 30 scales in a middle row on the flanks. The head, neck and base of the pectoral fins are scaly. The gill slits are narrow, the genital papilla of the males elongated, that of the females bulbous. The sideline system is developed differently and can also be completely absent.

Eviota species usually have dark, vertical stripes on the sides of the body and often dark spots along the belly line behind the anal fin.

Systematics

Within the family of gobies (Gobiidae) Eviota belongs to a clade of dwarf gobies, which in most cases live very closely (obligatory) with stone or octocorals (e.g. Bryaninops or Gobiodon ). Among these so-called “coral gobies ”, Eviota, together with the genera Kellogella and Sueviota, forms a group of elongated but blunt-snouted genera, in which close coexistence with corals is not mandatory. Sister genus of Eviota is Sueviota . Both genera differ only in the expression of the fifth (middle) pelvic fin ray.

species

By May 2019 over 100 species have been described:

Eviota abax
Eviota afelei
Eviota distigma
Eviota here
Eviota indica
Eviota masudai
Eviota prasina
Eviota prasites
Eviota sebreei
Eviota smaragdus
Eviota zonura

literature

Individual evidence

  1. Jump up ↑ Luke Tornabene, Samantha Valdez, Mark Erdmann, Frank Pezold: Support for a 'Center of Origin' in the Coral Triangle: cryptic diversity, recent speciation, and local endemism in a diverse lineage of reef fishes (Gobiidae: Eviota). Molecular Phylogenetics and Evolution, October 2014, DOI: 10.1016 / j.ympev.2014.09.012
  2. ↑ Christine E. Thacker, Dawn M. Roje: Phylogeny of Gobiidae and identification of gobiid lineages. Systematics and Biodiversity (2011), 9 (4): 329-347, ISSN  1478-0933 doi : 10.1080 / 14772000.2011.629011

Web links

Commons : Eviota  - collection of images, videos and audio files