Porrostoma

Most of the >100 species in Porrostoma were formerly placed in other genera such as Metriorrhynchus, and as a result, the spelling of the species names is subject to much confusion in the literature and online sources (e.g. ^[1]) but under ICZN Article 31 the correct spelling of all adjectival names requires agreement with the neuter gender of the genus, while all names that are nouns (or potentially nouns; e.g., eremita,^[2] eucerus,^[3] frater,^[4] hexastichus,^[5] monticola,^[6] nigricauda,^[7] paradoxa,^[8] quinquecavus,^[9] rhipidius^[10], and trichocerus^[11]) must retain their original spelling, and do not change.^[12]