Apycnodiscus
Species
Apycnodiscus decussatum (Begg, 1934)
Occurrence: Fairmount
Reference: Smith and Paul, 1982
Includes Cyclocystoides mundulus Miller and Dyer, 1878
Characterized by circular to ovoid test, with 32–33 marginal ossicles; marginals with 2–3 (rarely 4) cupules, with prominent elongate tubercle