Definition of Protobifidus. Meaning of Protobifidus. Synonyms of Protobifidus

- The formation has provided the following fossils: Didymograptellus protobifidus Phyllograptus anna Pseudophyllograptus angustifolius Notopeltis sp. Michelinoceras...
- name for the Chewtonian (mid-Floian, Lower Ordovician) graptolite D. protobifidus sensu Benson & Keble, 1935, non Elles, 1933". Alcheringa: An Australasian...
- 68–69. Rjpper, E. A., 1937a. A note on the occurrence of Didymograptus protobifidus Elies in the Lower Ordovician of Victoria. Proceedings of the Royal Society...
- unidentified comparable form †Didymograptus gracilis †Didymograptus protobifidus †Dielasma †Dimegelasma †Diparelasma †Diparelasma typi**** – or unidentified...
- using admittedly obsolete nomenclature †Didymograptus †Didymograptus protobifidus †Dimeropygiella †Dimeropygiella caudanodosa †Diochthofera †Diochthofera...
- †Dictytonina pannula †Didymograptus †Didymograptus artus †Didymograptus protobifidus †Dielasma †Dielasma diabloense – or unidentified comparable form †Dielasma...