Comparative material, Carychium mexicanum Pilsbry, 1891 (AJC 2092) from Puebla, Mexico. A–L fresh shells collected proximal to topotypic locality (Orizaba, Mexico) A, I–J degrees of variation in apertural barriers. Scale bar 1 mm.

  Part of: Jochum A, Weigand AM, Bochud E, Inäbnit T, Dörge DD, Ruthensteiner B, Favre A, Martels G, Kampschulte M (2017) Three new species of Carychium O.F. Müller, 1773 from the Southeastern USA, Belize and Panama are described using computer tomography (CT) (Eupulmonata, Ellobioidea, Carychiidae). ZooKeys 675: 97-127.