"The family Zosimeidae, currently composed of the genera Zosime Boeck, 1873, Peresime Dinet, 1974, Heterozosime Kim &Lee. 2021, Acritozosime Kim & Lee, 2021 and Pseudozosime T. Scott, 1912, was erected by Seifried (2003) based on unique apomorphies in the mouth parts, P1 endopod, and P5 (Seifried 2003; Huys & Clark 2009). These genera can easily be distinguished from each other by the segmentation of the endopods of P2-P4 (Wells 2007; Koller & George 2011). Although the family is small, presently accommodating only 19 species/subspecies and mainly from sublittoral marine habitats (Wells 2007; Koller & George 2011), many unnamed species have been reported in the literature and are awaiting description (Carey & Montagna 1982; Mu et al. 2002; Seifried 2003; Chertoprud et al. 2009; Huys & Clark 2009). Zosime is the most speciose genus in the family, currently comprising 16 species/subspecies and assuming a wide geographical distribution (Koller & George 2011). Recently, Koller & George (2011) noted that some species display derived features in the antennule, fifth leg, and caudal ramus, and suggested that a phylogenetic study based on the type material of most species is necessary to confirm or reject the monophyletic status of the genus" (accordin to to Huys & Clark, 2016)

"Based on morphological comparison of female character states, the genus Zosime can be subdivided into three provisional groups, anneae-, incrassata-, and typica-group. These groups are distinguished from each other by differences in the antennule, antennary exopod, mandibular rami, armature of swimming legs, fifth leg, and caudal rami" (Kim et al., 2016)

BREVIFRONS Harris V.A., 1994

PORCELLIDIUM Claus, 1860 (syn. Thyone Philippi, 1840 )