Definition of "personid"

In the personid genus Distorsio, varix formation is accompanied by a reorientation of the aperture.

1995, Geerat J. Vermeij, A Natural History of Shells‎, page 31

Current research shows the personids to be more similar anatomically to the Ficidae than to the Ranellidae (Beu 1998).

2010, John Wesley Tunnell, Encyclopedia of Texas Seashells‎, page 183

The genus name is a good descriptor of the shells of personids, most of which are moderately to severely distorted.

2014, M. G. Harasewych, The Book of Shells: A Life-Size Guide to Identifying and Classifying Six Hundred Seashells‎