scales exhibit variation in the width of the marginal hyaline area, but intermediate specimens make separation of the two morphologies
difficult. Petasaria heterolepis scales also show differences, in the presence of tubercle rows in the hyaline area and degree of hyaline areal coverage, but separation into discrete varieties is difficult at present. However, specimens with scales bearing a protuberance are considered to be distinct enough to warrant the erection of a new species, Petasaria protuberans Jordan,Malinverno, Šupraha, Thomsen et Young sp. nov.
|Publication status||Published - 2016|