Richardson, C. L. (1989). Streptaxacea: Catalog of Species Part II: Ammonitellidae, Chlamydephoridae, Haplotrematidae, Rhytididae, Systrophiidae. Tryonia. 18: i, 1-154.
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Richardson, C. L.
1989
Streptaxacea: Catalog of Species Part II: Ammonitellidae, Chlamydephoridae, Haplotrematidae, Rhytididae, Systrophiidae