angleščinaShell thin, medium to large sized (commonly exceeding to 10 cm in length), laterally compressed, almost circular in outline, gaping anteriorly and posteriorly. Both valves somewhat convex, the right (lower) valve only a little more inflated and larger than the left (upper) valve. Ears small, subequal in size and shape, with the right anterior ear faintly sinuated at anteroventral margin and devoid of ctenolium. Surface of left valve with 2 broad and very shallow depressed areas radiating from the umbo to anteroventral and radial lines. Interior of both valves with distinct radial ribs, usually in pairs, much narrower than the flat interspaces and becoming obsolete on umbonal area. Right valve with 42 to 54 internal radial ribs (46 to 54 in the typical subspecies A. japonicum, and 42 to 48 in the southern A. japonicum balloti). Colour: outside of left valve reddish brown, with variable shades along the concentric growth marks; outer colour pattern of subspecies balloti also with small, yellowish and dark brown spots along radial lines on umbonal area and often with a few irregular, larger dark spots towards periphery. Interior of left valve glossy to pale yellow externally and internally; subspecies balloti with an additional external brown scattering along some concentric growth marks.
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Prevedeno iz angleščine prevedla BING
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slovenščinaLupini tanke, srednje velike velika (pogosto presega 10 cm dolžine), bočno stisnjen, skoraj krožno v oris, Zurenje anteriorly in Pozadi. Obe ventili nekoliko izbočen, desno (nižje) ventil, samo malo bolj napihnjen in večji od levi ventil (zgornji). Ušesa majhne, subequal v velikosti in oblike, s sprednjo desno uho rahlo sinuated, na robu anteroventral in brez ctenolium. Površino levi ventil z 2 široko in zelo plitvo območja v krizi širi na umbo anteroventral in radialni vrsticam. Notranjost tako ventili z različni radialni rebra, ponavadi v parih, veliko ožji kot ravno presledkov in postaja zastarela na umbonal področju. Pravica ventil z 42 do 54 notranja radialna rebri (46 do 54 v značilna podvrsta A. japonicum, in 42 48 v Južni balloti A. japonicum). Barva: zunaj levi ventil, rdečkasto rjava, s spremenljivo odtenki vzdolž koncentrični rasti znamk; zunanja barva vzorec podvrste balloti tudi z majhno, rumeno in temno rjave lise radialni okvirih na umbonal področju in pogosto z nekaj nepravilnih, večje temne lise proti obrobju. Notranjost levi ventil sijajni do bledo rumeno, zunanje in notranje; podvrste balloti z dodatne zunanje rjave sipanje skupaj nekaj znamk koncentrični rasti.