The family Geplanaviridae has recently been approved by the International Committee for the Taxonomy of Viruses (ICTV), in the year 2023, as a separate family under the order Geplafuvirales, based on sequence analysis of many unclassified circular single-stranded DNA viral genomes, which have characteristic features suggesting rolling circle replication. These viruses, along with other previously classified ones, share several common features allowing them to be commonly identified as circular replication-associated protein (Rep)-encoding single-stranded DNA viruses (CRESS DNA viruses). CRESS DNA viruses have been discovered from a diverse range of hosts which include organisms from all three domains of life, namely, archaea, bacteria, and eukaryotes, and have some of the smallest genomes among viruses (Kazlauskas et al. 2018). Within CRESS DNA viruses, among the several groups described, a group known as CRESSV6 exists (Kazlauskas et al. 2018, 2019; Kinsella et al. 2022; Kraberger et al. 2015; Krupovic et al. 2020) of which 37 viral genomes have been recently analyzed in detail, based on their Rep sequences, leading to the proposal of forming a new family Geplanaviridae. All the Rep sequences have the Geminivirus Rep Sequence (GRS) motif (Nash et al. 2011), which is a characteristic and specific feature of viruses in the families Geminiviridae and Genomoviridae. The sequence analysis of the Rep and their genome organization have revealed common features, which are sufficiently different from those found in CRESS DNA viruses for which taxonomy is established, namely, the families Geminiviridae and Genomoviridae, prompting the analyzed CRESS DNA viruses to be placed under a new family, Geplanaviridae.