Cephalopoda - Ellesmerocerida - Balkoceratidae
Full reference: R. H. Flower. 1964. The Nautiloid Order Ellesmeroceratida (Cephalopoda). State Bureau of Mines and Mineral Resources New Mexico Institute of Mining and Technology, Memoir 12:234 p.
Parent taxon: Ellesmerocerida according to R. E. Crick 1981
See also Flower 1964
Sister taxa: Acaroceratidae, Antacaroceras, Bambusoceras, Bathmoceratidae, Cyptendocerina, Cyrtocerinina, Ellesmeroceratidae, Ellesmeroceratina, Eocyckistomiceras, Eothinoceratidae, Huaiheceratidae, Hunyuenoceras, Parapalaeoceras, Phthanoncoceratidae, Plectronoceratidae, Plectronoceratina, Protocycloceratidae, Qiushougouceras, Rioceratidae, Rudolfoceratidae, Shideleroceratidae, Theskeloceras, Vassaroceras, Xiaoshaoceras
Subtaxa: Balkoceras
Ecology: nektobenthic carnivore
Distribution: found only at Threadgill Creek section (San Saba Limestone) (Cambrian of Texas)