Gastropoda - Architaenioglossa - Ampullinidae

Alternative combination: Pseudocrommium carmenensis

Full reference: B. L. Clark and J. W. Durham. 1946. Eocene Faunas from the Department of Bolivar, Colombia. Geological Society of America Memoir 16:1-126

Belongs to Pachycrommium according to R. Majima 1989

Sister taxa: Amaurellina (Pachycrommium) fahmii, Amaurellina (Pachycrommium) moradi, Pachycrommium clarki, Pachycrommium dalli, Pachycrommium eburnoides, Pachycrommium harrisi, Pachycrommium indicum, Pachycrommium martini, Pachycrommium nagaoi, Pachycrommium oweni, Pachycrommium saginata, Pseudocrommium gabrielensis

Type specimen: CAS 31694, a shell. Its type locality is C.A.S. locality 31694, Colombia, which is in the Bartonian of sandstone Colombia.

Ecology: epifaunal grazer

Average measurements (in mm): shell 23.5 x 11.0