genus C

New genus C Korn & Hairapetian (in press) Type species New species K to be described by Korn & Hairapetian (in press); original designation. Diagnosis Genus of the family Pleuronautilidae with subevolute conch; whorl profile inverted trapezoidal, weakly depressed or equidimensional with broadly rounded venter, parallel or weakly convergent flanks, rounded umbilical margin and convex or flattened umbilical wall. Sculpture with ribs on the flanks, without nodes or tubercles. Suture line with very shallow external lobe and broadly rounded lateral lobe; without annular process (from Korn & Hairapetian in press: 38). Included species Central Iran (Korn & Hairapetian in press): new species K to be described by Korn & Hairapetian (in press), Wuchiapingian; new species L to be described by Korn & Hairapetian (in press), Wuchiapingian; new species M to be described by Korn & Hairapetian (in press), Wuchiapingian. Remarks The new genus C will be introduced by Korn & Hairapetian (in press) for Permian species with a conch shape and sculpture similar to some Triassic species of Pleuronautilus, such as P. mosis Mojsisovics, 1882. The main difference, however, is that the new genus does not possess the annular process that is present in Pleuronautilus. Other Late Permian species from other regions may also belong to the new genus. This is particularly true for the species from the Salt Range and southern China, which are usually classified as Metacoceras or Pleuronautilus. However, this will have to be verified based on the original material as part of a revision.