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Taxonomy
Cardium subquadratum was named by Evans and Shumard (1857). It is a 3D body fossil.
It was recombined as Protocardia subquadrata by Warren (1934).
It was recombined as Protocardia subquadrata by Warren (1934).
Sister species lacking formal opinion data
P. africana, P. barneyi, P. beiha, P. besairiei, P. bipi, P. contusa, P. hillanum, P. lycetti, P. moshuiwanensis, P. olea, P. oxynoti, P. parahillana, P. pertenuis, P. phillipiana, P. rahmuensis, P. regulare, P. schucherti, P. spillmani, P. subhillanum, P. texana, P. tosensis, P. amanoi, P. lycetti, P. peraltaensis, P. phillipiana
Synonymy list
Year | Name and author |
---|---|
1857 | Cardium subquadratum Evans and Shumard p. 39 |
1934 | Protocardia subquadrata Warren p. 89 |
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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.
†Protocardia subquadrata Evans and Shumard 1857
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Diagnosis
No diagnoses are available