Results for 'Peltoceras marysae' (2 entries found)

Peltoceras marysae is an evolute species. The microconch only shows the first two stages of the macroconch: the inner whorls show fine, dense simple ribs, which then become a bit stronger and sometimes fork. The ammonite is terminated by two lappets.

Peltoceras marysae is an evolute species and its ornamentation changes a lot along its growth. The inner whorls show fine, dense simple ribs, which then become a bit stronger and sometimes fork. Then appears a bituberculated stage with very strong tubercles. The ornamentation becomes softer on the b... [view details for full description]