Approximately fifty species have been assigned to the genus; the following are
accepted: •
P. eichwaldi shunnerensis (
King, 1914). 326.4–318.1 Ma,
Great Shunner Fell, England.
Synonyms Griffithides shunnerensis,
P. shunnerensis,
Weberides shunnerensis. •
P. helmsensis (
Whittington, 1954). 339.4–318.1 Ma, Texas. •
P. iwaizakiensis (
Kobayashi and
Hamada, 1984). 265.0–259.0 Ma, Japan. •
P. morrowensis (
Mather, 1915). 318.1–314.6 Ma, Oklahoma. Synonym
Griffithides morrowensis. •
P. mucronatus (
Girty, 1910). 339.4–336.0 Ma, Arkansas and Oklahoma. Synonym
Griffithides mucronatus. •
P. opisthops (Kobayashi and Hamada, 1979). 314.6-306.95 Ma, Thailand. •
P. veeravurusi (Kobayashi and Hamada, 1979). 314.6-306.95 Ma, Thailand. ==References==