Lucilla singleyana is a species of small air-breathing land snail, a terrestrial pulmonate gastropod mollusc or micromollusk in the family Helicodiscidae.

Lucilla singleyana was originally discovered and described (under the name Zonites singleyanus) by Henry Augustus Pilsbry in 1889.

Shell minute, broadly umbilicate, planorboid, the spire scarcely perceptibly exserted; subtranslucent, waxen white, shining, smooth, under a strong lens seen to be slightly wrinkled by growth-lines; whorls three, rather rapidly increasing, separated by well-impressed sutures, convex, the apex rather large; body-whorl depressed, slightly descending, indented below around the umbilicus; aperture small, semilunar, oblique; peristome simple, acute.

I have also found a few specimens among the shells collected by myself in central Texas, during the winter of 1885-'86.

This depressed form has been noticed in Mexico by Strebel,* who proposes for Z. minusculus the new generic title of Chanomphalus, which of course is completely synonymous with Pseudohyalina Morse, 1864, and this again is not different enough from Hyalina to warrant the erection of a new genus or sub-genus.

* Vide Beitrag zur Kenntniss der Fauna mexikanischer Land und Süsswasser

Then non-indigenous distribution areas include: This species was previously announced from the Czech Republic since 1988, but later in 2009 was all findings recognized as Lucilla scintilla.