|Basic info||Taxonomic history||Classification||Relationships|
|Morphology||Ecology and taphonomy||External Literature Search||Age range and collections|
Trilobita - Ptychopariida - Olenidae
It was recombined as Triarthrus tetragonalis by Harrington and Leanza (1952), Harrington and Leanza (1957) and Robison and Pantoja-Alor (1968); it was recombined as Bienvillia tetragonalis by Henningsmoen (1957) and Ludvigsen and Tuffnell (1983).
|Year||Name and author|
|1938||Parabolinella tetragonalis Harrington p. 196|
|1952||Triarthrus tetragonalis Harrington and Leanza p. 192|
|1957||Triarthrus tetragonalis Harrington and Leanza|
|1957||Bienvillia tetragonalis Henningsmoen p. 144|
|1968||Triarthrus tetragonalis Robison and Pantoja-Alor p. 791|
|1983||Bienvillia tetragonalis Ludvigsen and Tuffnell p. 574|
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If no rank is listed, the taxon is considered an unranked clade in modern classifications. Ranks may be repeated or presented in the wrong order because authors working on different parts of the classification may disagree about how to rank taxa.