|Basic info||Taxonomic history||Classification||Relationships|
|Morphology||Ecology and taphonomy||External Literature Search||Age range and collections|
Lingulata - Acrotretida - Acrotretidae
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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.
|A. Williams 1962||Large Conotreta, fight brown and pink with shades of cream-blue in colour, with a high, subconical pedicle valve flattened posteriorly along a wide pseudointerarea with a poorly defined or obscure median track, commissure outline transversely oval just over two-thirds as long as wide, ornamented by closely spaced, overlapping growth-lamellae; ventral vaseula media bifurcating just anterior to the pediculate boss, at least 2 pairs of lateral sinuses also impressed; brachial valve unknown.|