Query Genus Locality Fossil Stomatorbina concentrica Main Key to Species About Contact
Class: Rotaliata    Subclass: Textulariana    Order: Lituolida    Family: Trochamminidae
Portatrochammina Echols, 1971

Portatrochammina antarctica
(Parr, 1950)
identified by scientist   
Quaternary
Gulf of Mexico

Portatrochammina karica
(Shchedrina, 1946)
identified by scientist   
Quaternary
Barents Sea

Portatrochammina pacifica
(Cushman, 1925)
type specimen   holotype
Quaternary
Western Canada and USA