Polygonia comma form of comma is frequently confused with the dark form of the question mark ("P. interrogationis"), but the two can readily be distinguished by the shape of the comma mark on the underside. The pale form is easily confused with the satyr comma ("P. satyrus"), which usually occurs north and west of the eastern comma's range. They can be distinguished by the upperside color, which is orange brown in the comma and tawny yellowish brown in "P. satyrus"; by the underside pattern, which tends to be mottled in the comma but appears to be more longitudinally streaked in "P. satyrus";
Comma , , "dòuhào") in China. Since East Asian typography permits commas to join clauses dealing with certain topics or lines of thought, commas may separate subjects and predicates and constructions that would be considered a "comma splice" in English are acceptable and commonly encountered. Korean punctuation uses both commas and interpuncts for lists. In Unicode 5.2.0 "numbers with commas" ( through ) were added to the Enclosed Alphanumeric Supplement block for compatibility with the ARIB STD B24 character set. The comma in the Arabic script (used by Arabic, Urdu, and Persian, etc.) is inverted, upside-down: " (), in order to