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Lepomis peltastes
The northern sunfish (''Lepomis peltastes'') is a North American species of freshwater fish in the sunfish family (Centrarchidae) of order Perciformes. ''Lepomis peltastes'' was traditionally recognized as a subspecies of longear sunfish (''Lepomis megalotis'') but is often considered to be a separate species.〔Bailey, R. M., W. C. Latta, and G. R. Smith. 2004. An atlas of Michigan fishes with keys and illustrations for their identification. University of Michigan Museum of Zoology, Miscellaneous Publications 192, Ann Arbor.〕 However, this change remains controversial.〔Hubbs, C. L., K. F. Lagler, and G. R. Smith. 2004. Fishes of the Great Lakes region, revised edition. University of Michigan Press, Ann Arbor.〕
==Identification==
The northern sunfish (''Lepomis peltastes'') and the longear sunfish (''Lepomis megalotis'') contain very few physical variations. Both are generally small, vibrantly scaled fish with bright, elongated opercular flaps which give the fish an appearance of an ear. This "ear" is a key factor in differentiating the two fish. ''Lepomis peltastes'' opercular flaps tend to have an outline of white and red, while ''Lepomis megalotis'' outlines are strictly white. Although each species coloration is nearly identical, the patterns which form from these colors are not. The northern sunfish tends to have more of a lateral stripe and speckled turquoise pattern along its sides, while the longear sunfish tends to have spotting on its sides, still in turquoise. Each fish also has "war paint" all the way from the mouth to the edge of the gill flap in the same color as the speckles or spots. Both also contain olive sides and bright orange bellies. These few differences between ''Lepomis peltastes'' and ''Lepomis megalotis'' leave these fish incredibly hard to distinguish from one another.〔Michigan - Dearborn, University Of. "Fish." Friends of the Rouge:. University of Michigan - Dearborn, Web. 04 Jan. 2015. (Rouge Watershed - Northern Longear Sunfish ).〕 In all other aspects, these fish look near identical.
The northern sunfish is usually regarded as a subspecies of the longear sunfish due to little and/or improper justification as to why this fish should be elevated as a separate species.〔Jennings, Martin. "Online Fishes of Wisconsin." Fishes of Wisconsin. Fishes of Wisconsin, June 2013. Web. 04 Jan. 2015. (Fishes of Wisconsin - Longear Sunfish ).〕 The assertion, brought about by Carl Leavitt Hubbs over three decades ago, has yet to be clarified with ichthyologists.
抄文引用元・出典: フリー百科事典『 ウィキペディア（Wikipedia）』
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