Family EUCALLIACIDAE Manning & Felder, 1991

TYPE GENUS. — Eucalliax Manning & Felder, 1991 .

REMARKS

The family has a well-documented fossil record with a stratigraphic span reaching back to Late Cretaceous (Cenomanian) (Charbonnier et al. 2017) . The assignment of the fossil material consisting of isolated cheliped elements to various eucalliacid genera was discussed in several studies (Hyžný 2012; Hyžný & Hudáčková 2012; Hyžný & Gašparič 2014). However, recent revisions of extant representatives based both on molecular and morphological characters (Poore et al. 2019; Robles et al. 2020; Poore 2021) call for re-evaluation of the fossil record of these animals.