Lingula is a Latin word meaning little tongue and can stand for: It has been suggested that History of the Latin language be merged into this article or section. ... Many animals have longer and more flexible tongues than humans. ...
The genus Lingula a brachiopod of the class of the Lingulata
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In Lingula the shell is composed of alternate layers of chitin and of phosphate of lime.
The structures formerly regarded as pseudohearts have been shown by Huxley to be nephridia; the true heart was described and figured by A. Hancock, but has in many cases escaped the observation of later zoologists.
In Discinisca and Lingula, however, the sub-oesophageal ganglion is not drawn out, but lies medianly; it gives off two posteriorly directed nerves to the stalk, which in Lingula unite and form a substantial nerve.
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