Ammonite species from the "OXFORDIAN" stage (1 entry found)

Small involute species. The last whorl shows two elbows (a round one followed by a pinched one) and narrow flanks. The thin ribs start above a flat periumbilical zone and they generally divide into two ribs at mid-flank. The umbilicus has a rectangular shape with rounded angles. The rostrum is prece... [view details for full description]