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Laevitrigonia troedssoni
Taxonomy
Laevitrigonia troedssoni was named by Melville (1956). It is not extant. Its type specimen is GSM Bj 2538/36. Its type locality is Stowell Park borehole (T. ibex Zone, B. centaurus Subzone, 985-1188ft), which is in a Pliensbachian marine mudstone/shale in the Lower Lias Formation of the United Kingdom.
Sister species lacking formal opinion data