Lamprocyclas maritalis group?
Massive shell; cephalis oval, with a large apical horn (shell structure 2). Thorax cupola-shaped, with regular, circular, framed pores. Abdomen separated by a conspicuous lumbar stricture, inflated, with larger, regularly arranged, framed pores, usually with a well-defined poreless peristome with teeth.
Lamprocyclas maritalis maritalis Haeckel differs from Lamprocyclas maritalis Haeckel polypora Nigrini in having a less inflated abdomen. Maximum breadth of abdomen: 100-140 µm.
Ref.: Nigrini and Moore (1979).