Nanobdellaceae

Abstract Na.no.bdel.la.ce'ae. N.L. fem. n. Nanobdella , the type genus of the family; L. fem. pl. n. suff. ‐ aceae , ending to denote a family; N.L. fem. pl. n. Nanobdellaceae , the family Nanobdella . Nanobdellota / Nanobdellia / Nanobdellales / Nanobdellaceae Currently, Nanobdellaceae is the sole family of the order Nanobdellales and contains the sole genus Nanobdella including the only species with a validly published name, Nanobdella aerobiophila . Based on phylogenetic analysis, the genera “Nanopusillus” and “ Nanoclepta ” should be included in this family. Although these genera were described earlier than Nanobdella , their names have not been validly published. Thus, these genera cannot serve as the nomenclatural types of the higher taxa. Members of this family are obligately symbiotic, only growing in coculture with their specific archaeal hosts. Depending on their hosts, they grow under aerobic or anaerobic conditions. Cells are small cocci and occur singly or attached to the cell surface of their hosts. The genome size of the members of this family range between 0.58 and 0.67 Mb. DNA G + C content (mol%) : 24.2–32.2. Type genus : Nanobdella Kato et al. 2022 VP .