Species;N;"Gill arch 1";"Gill arch 2";"Gill arch 3";"Gill arch 4";"Gill arch 5" Anterior;Posterior;Anterior;Posterior;Anterior;Posterior;Anterior;Posterior;Anterior "P. jackschultzi";3;"11–12 (1a)";"12–13 (1b)";"2–3 (1b)/10–11 (3)";"13–14 (1b)";"2–3 (1b)/10–11 (3)";"14 (1b)";"2–3 (1b)/10 (3)";"17 (2)";"16 (2)" "P. infans";4;"14–15 (1a)";"18–20 (1b)";"16–17 (1b)";"18–19 (1b)";"18–19 (1b)";"18–20 (1b)";"20–22 (1b)";"18–19 (2)";"18–19 (2)" "P. lucida";4;"14–15 (1a)";"20–21 (1b)";"20–21 (1b)";20–21(1b);"20–21 (1b)";"19–21 (1b)";"18–19 (1b)";"20–21 (2)";"19–21 (2)" "P. occidentalis";4;"11–12 (1a)";"18–19 (1b)";"19-20 (1b)";"19–21 (1b)";"18–20 (1b)";"17–19 (1b)";"18–19 (1b)";"24–25 (2)";"23–24 (2)" "P. prolifica";4;"10–11 (1a)";"14–15 (1b)";14–16(1b);"14–16 (1b)";"14–16 (1b)";"14–16 (1b)";"15–16 (1b)";"18–20 (2)";"15–16 (2)" "P. monacha";4;"12–13 (1a)";"14–16 (1b)";"13–14 (3)";"15–16 (1b)";"16–18 (3)";"15 (1b)";"15 (3)";"17–18 (2)";"16–17 (2)"