Ylistrum
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Ylistrum is a genus of marine bivalve mollusks in the family Pectinidae, the scallops.
There are four species currently in the genus:
- Ylistrum balloti (Bernardi, 1861)
- Ylistrum japonicum (Gmelin, 1791)
- †Ylistrum morganense (Beu & Darragh, 2001)
- †Ylistrum subcostatum (Beu & Darragh, 2001)
Previously, these species were considered to be members of Amusium, but a 2014 paper determined that the resemblance of their shell to Amusium pleuronectes is a case of convergent evolution; thorough studies of genetics and morphology allowed for the description of Ylistrium as a new genus, being sister to Antillipecten.