|Basic info||Taxonomic history||Classification||Relationships|
|Morphology||Ecology and taphonomy||External Literature Search||Age range and collections|
Bivalvia - Arcida - Arcidae
It was recombined as Limopsis declivis by Conrad (1860); it was recombined as Trigonarca declivis by Dall (1898); it was recombined as Trinacria declivis by Harris (1919); it was recombined as Halonanus declivis by Gardner (1945).
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.