Lingula has not risen since the Silurian epoch, whereas other molluscs may have risen.
"The Life and Letters of Charles Darwin, Volume II (of II)" by Charles Darwin
Remember Silurian Nautilus, Lingula and other Brachiopods, and Nucula, and amongst Echinoderms, the Silurian Asterias, etc.
"More Letters of Charles Darwin" by Charles Darwin
But the evidence that animal life commenced with the Lingula-flags, 'e.g.
"Lectures and Essays" by T.H. Huxley
The specimens of existing Lingula are precisely similar to those found in the earliest geological formations.
"Scientific American, Volume 40, No. 13, March 29, 1879" by Various
The Buglossus solea or soale plana and oculata as also the Lingula or small soale all in very great plentie.
"The Works of Sir Thomas Browne" by Thomas Browne