|Basic info||Taxonomic history||Classification||Relationships|
|Morphology||Ecology and taphonomy||External Literature Search||Age range and collections|
Lingulata - Lingulida - Lingulasmatidae
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||Dark-brown, elongate, parallel-sided and gently biconvex Lingulella, ventral umbo
obtuse, pedicle valve almost two-thirds as wide as long; ornamentation consisting of fine, crowded, concentric raised lines, about 16 per millimetre antero-medianly, as well as variably spaced concentric growth-ridges; dorsal interior with a well-defined median ridge extending forward for over half the length of the
brachial valve and separating a pair of narrow, wedge-shaped, slightly raised areas radiating from the umbo; ventral interior with a low, broad, median ridge extending anteriorly for about one-haft the length of the pedicle valve and united with a pair of reniform raised areas which are disposed normally to the median ridge at about two-fifths of the length of the valve.