== References ==* Introduction to the Lingulata* Proof that Lingula (Brachiopoda) is not a living-fossil, and emended diagnoses of the Family Lingulidae A paper that argues that genus "Lingula" is not as old as most think.
* Introduction to the Lingulata* Emig, C. C. (2003) Proof that "Lingula" (Brachiopoda) is not a living-fossil, and emended diagnoses of the Family Lingulidae* Лингула