An pagkakaiba han mga rebisyon han "Isda"

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Bagis 13:
==Taxonomiya==
 
Gin babahinGinbabahin sa tulo na ''extant class'' ngan an extinct danay sakob san tulo na extant og may kalugaringun na ''class'' sa taditionaltraditional na klasipikasyon san mga isda:<ref name="Romer, A 1977">[[Alfred Romer|Romer, A.S]]. & T.S. Parsons. 1977. ''The Vertebrate Body.'' 5th ed. Saunders, Philadelphia. (6th ed. 1985)</ref><ref>Benton, M. J. (1998) The quality of the fossil record of vertebrates. Pp. 269–303, in Donovan, S. K. and Paul, C. R. C. (eds), The adequacy of the fossil record, Fig. 2. Wiley, New York, 312 pp.</ref>
* Class [[Agnatha]] (''jawless fish'')
** Subclass [[Cyclostomata]] ([[hagfish]] ngan [[lamprey]])