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";
D-comma and is no longer in use. Ḑ ḑ is part of the Livonian alphabet but is written with a cedilla. Unicode does not include precomposed characters for D̦ d̦—they must be represented with a combining diacritic, which may not align properly in some fonts. Nevertheless, the sequence of base character + combining diacritic is given a unique name. Otherwise, the D-cedilla (Ḑ ḑ) is somewhat to be a substitute as part of the Unicode standards because the typographic point of view of D-cedilla is very similar that has a comma. D-comma D̦ d̦ (D-comma) is a letter that was part