Acipenseredoj: Malsamoj inter versioj

}}</ref> La familio estas grupigita en kvar genroj: ''[[Acipenser]]'', ''[[Huso]]'', ''Scaphirhynchus'' kaj ''Pseudoscaphirhynchus''. Kvar specioj eble jam estas formortintaj[[formortinta]]j.<ref name="IUCN">{{cite web | url=http://www.iucn.org/?4928/Sturgeon-more-critically-endangered-than-any-other-group-of-species | title=Sturgeon More Critically Endangered Than Any Other Group of Species | publisher=International Union for Conservation of Nature | work=International News Release | date=18a de marto, 2010 | accessdate=19a de septembro, 2015 |author1=Chadwick, Niki |author2=Drzewinski, Pia |author3=Hurt, Leigh Ann }}</ref> Du proksime rilataj specioj, ''[[Polyodon spathula]]'' (American paddlefish) andkaj ''[[Psephurus gladius]]'' (Chineseeble paddlefish, possibly extinctformortintaj) areestas ofde thela samesama orderordo, [[AcipenseriformesAcipenseroformaj]], butsed areestas inen thela familyfamilio [[PolyodontidaePoliodontedoj]] andkaj arene notestas consideredkonsiderataj to bekiel "trueveraj" sturgeonsacipenseroj. BothKaj sturgeonsacipenseroj andkaj paddlefishpoliodonoj haveestis beenreferencataj referred to askiel "[[primitive fishes]]prafiŝoj" becausepro theirsiaj [[MorphologyMorfologio (biologybiologio)|morphologicalmorfologiaj]] characteristicskarakteroj haverestis remainedrelative relativelysenŝanĝe unchangedekde sincela theplej earliestantikva [[fossilFosilio|fosilia recordregistro]].<ref name=USFWS>{{cite web|title=Atlantic Sturgeon|url=http://www.fws.gov/chesapeakebay/sturgeon.html|publisher=U.S. Fish & Wildlife Service|author=Chesapeake Bay Field Office|accessdate=June10a 10de junio, 2014}}</ref><ref>{{cite web|title=Lake sturgeon|url=http://www.dnr.state.mn.us/rsg/profile.html?action=elementDetail&selectedElement=AFCAA01020|publisher=Minnesota Dept. of Natural Resources|accessdate=June10a 10de junio, 2014}}</ref> SturgeonsAcipenseredoj areestas nativeindiĝenaj tode subtropicalsubtropikaj, temperatemoderklimataj andkaj sub-Arcticĉearktaj riversriveroj, lakeslagoj andkaj coastlinesmarbordoj ofde [[Eurasia]] and [[North America]].<ref name=WashingtonEdu>{{cite web|url=http://courses.washington.edu/fish311/FISH%20311%20files/08-Primitive%20bony.pdf|publisher=University of Washington|title=Biology of Fishes (chapter: Biodiversity II: Primitive Bony Fishes and The Rise of Modern Teleosts)|accessdate=May 30, 2014}}</ref>

SturgeonsAcipenseredoj are long-lived, late-maturing fishes with distinctive characteristics, such as a [[Fish fin#AnchCaudal|heterocercal caudal fin]] similar to those of [[shark]]s, and an elongated, spindle-like body that is smooth-skinned, scaleless, and armored with five lateral rows of bony plates called [[scutes]]. Several species can grow quite large, typically ranging {{cvt|7|–|12|ft|m|frac=2}} in length. The largest sturgeon on record was a [[Beluga sturgeon|beluga]] female captured in the [[Volga estuary]] in 1827, weighing {{cvt|1,571|kg|lb}} and {{cvt|7.2|m|ft}} long. Most sturgeons are [[anadromous]] [[benthos|bottom-feeders]], which migrate upstream to spawn, but spend most of their lives feeding in [[river deltas]] and [[estuaries]]. Some species inhabit freshwater environments exclusively, while others primarily inhabit marine environments near [[coastal]] areas, and are known to venture into open ocean.