Mortoniceras

Mortoniceras is an ammonoid genus belonging to the superfamily Acanthocerataceae, named by Meek in 1876, based on "Ammonites vespertinu", named by Morton in 1834.
"Mortoniceras" is the type genus of the Mortoniceratinae, one of 4 subfamilies in the Brancoceratidae which is part of the Acanthocerataceae (renamed Acanthoceratoidea to conform with the ICZN ruling on superfamily endings)
Distribution.
"Mortoniceras" is found in middle and upper Albian sediments, at the end of the Lower Cretaceous in Algeria, Angola, Armenia, Belgium, Canada (British Columbia), Colombia (Hiló Formation), Ecuador, France, Germany, Iran, Japan, Madagascar, Mexico, Mozambique, Nigeria, South Africa, Spain, Suriname, Switzerland, Ukraine, the United Kingdom, the United States (California, New Mexico, Texas, Oregon), and Venezuela.