Description
Li ke Challengeria , but has spines on sharp margi nal edge of shell (Fig . 34). FAM ILY MEDUSETTIDAE Haeckel , 1887 Ovate , hemispherica l or cape-shaped (ovate with a broad basal opening) shell of alveolated stru cture , with by-spines , and with or without ap ical spine. Peristome surrounded by cyl indri cal , hollow, articulated sp ines (Fig . 42)
Type species
Figures
No linked figures.
Raw text
Li ke Challengeria , but has spines on sharp margi nal edge of shell (Fig . 34). FAM ILY MEDUSETTIDAE Haeckel , 1887 Ovate , hemispherica l or cape-shaped (ovate with a broad basal opening) shell of alveolated stru cture , with by-spines , and with or without ap ical spine. Peristome surrounded by cyl indri cal , hollow, articulated sp ines (Fig . 42)