Icriodus alternatus helmsi Sandberg and Dreesen, 1984

Fig. 5G.

Icriodus alternatus helmsi; Sandberg and Dreesen 1984: 159, pl. 2: 1–4, 6–7.

Remarks.—The P 1 (Pa, I) element of Icriodus alternatus helmsi is characterized by alignment of the cusp with the innerlateraldenticles.Specimensinwhichthemedialdenticles are absent commonly occur in the Lower Pa. triangularis Zone through Middle Pa. crepida Zone (Sandberg and Dreesen 1984).