Gasterosteus

Superregnum: Eukaryota
Cladus: Unikonta
Cladus: Opisthokonta
Cladus: Holozoa
Regnum: Animalia
Subregnum: Eumetazoa
Cladus: Bilateria
Cladus: Nephrozoa
Superphylum: Deuterostomia
Phylum: Chordata
Subphylum: Vertebrata
Infraphylum: Gnathostomata
Megaclassis: Osteichthyes
Superclassis/Classis: Actinopterygii
Classis/Subclassis: Actinopteri
Subclassis/Infraclassis: Neopterygii
Infraclassis: Teleostei
Megacohors: Osteoglossocephalai
Supercohors: Clupeocephala
Cohors: Euteleosteomorpha
Subcohors: Neoteleostei
Infracohors: Eurypterygia
Sectio: Ctenosquamata
Subsectio: Acanthomorphata
Divisio/Superordo: Acanthopterygii
Subdivisio: Percomorphaceae
Series: Eupercaria
Ordo: Perciformes
Subordo: Cottoidei
Infraordo: Gasterosteales

Familia: Gasterosteidae
Genus: Gasterosteus
Species: G. aculeatus – G. crenobiontus – G. gymnurus – G. islandicus – G. microcephalus – G. wheatlandi

Nomina dubia: G. occidentalis
Name

Gasterosteus Linnaeus, 1758
Gender: masculine
Type species: Gasterosteus aculeatus Linnaeus, 1758

Source

Linnaeus, C. 1758. Systema Naturae per regna tria naturæ, secundum classes, ordines, genera, species, cum characteribus, differentiis, synonymis, locis, Tomus I. Editio decima, reformata. Holmiæ: impensis direct. Laurentii Salvii. i–ii, 1–824 pp DOI: 10.5962/bhl.title.542: 295. Open access Reference page.
Gasterosteus in the World Register of Marine Species
Gasterosteus at FishBase

Vernacular names
eesti: Ogalik

Gasterosteus is a genus of ray-finned fishes belonging to the family Gasterosteidae, the sticklebacks. These fishes are found in freshwater, brackish water and marine habitats in the Holarctic region.
Species

There are currently 6 recognized species in this genus:

Gasterosteus aculeatus Linnaeus, 1758 (Three-spined stickleback)
†Gasterosteus crenobiontus Băcescu & R. Mayer, 1956 (Techirghiol stickleback)
Gasterosteus islandicus Sauvage, 1874 (Iceland stickleback)
Gasterosteus microcephalus Girard, 1854 (Smallhead stickleback)
Gasterosteus nipponicus Higuchi, Sakai & A. Goto, 2014 [1]
Gasterosteus wheatlandi Putnam, 1867 (Black-spotted stickleback)

Additionally there are a number of fossil species including:

†Gasterosteus kamoensis Nazarkin, Yabumoto & Urabe, 2013

References

Higuchi, M., Sakai, H. & Goto, A. (2014): A new threespine stickleback, Gasterosteus nipponicus sp. nov. (Teleostei: Gasterosteidae), from the Japan Sea region. Ichthyological Research, (61) 4: 341-351.`