Genus names whose last component is a present participle (usually ending in -ens or -ans), which is treated as a noun [Rule 10a], can be in any gender. The gender can be chosen by the original authors and if this did not happen can be chosen by later authors [Rule 65 (1)]. A list of genus names formed in that manner is provided below. Epithets derived from present participles are not listed here. A special case is genes, which originally is an Ancient Greek suffix meaning "born from" but is nowadays mainly used as a Neolatin suffix meaning "producing". See also the LPSN introductory page on forming names.
"Candidatus Ethaniperedens" corrig. — "Candidatus Hydrogenedens" — "Candidatus Methanoperedens" — Saccharedens
Acerihabitans — Aestuariihabitans — Algihabitans — Antrihabitans — Aquihabitans — Ascidiaceihabitans — Calderihabitans — Coraliihabitans — Cribrihabitans — Desertihabitans — Entomohabitans — "Candidatus Equihabitans" — "Candidatus Fimihabitans" — Frondihabitans — Glaciihabitans — Herbihabitans — Humihabitans — Insectihabitans — Jatrophihabitans — Lacihabitans — Lacisediminihabitans — Lichenihabitans — "Candidatus Limihabitans" — Limnohabitans — Litorihabitans — Mangrovihabitans — Marihabitans — Membranihabitans — Mycetohabitans — Oceanihabitans — Paludihabitans — Pelagihabitans — Phytohabitans — "Candidatus Poriferihabitans" — "Candidatus Pyrohabitans" — Qaidamihabitans — Rhizohabitans — Rivihabitans — Salinihabitans — Sediminihabitans — Solihabitans — "Candidatus Spongiihabitans" — Stagnihabitans — "Stomatohabitans" — "Synoicihabitans" — "Candidatus Synoicihabitans" — Tamaricihabitans — Terrihabitans — Tropicihabitans — Zophobihabitans
Aestuariivivens — "Candidatus Aphodovivens" — Brotonthovivens — "Candidatus Caccovivens" — "Candidatus Colivivens" — "Candidatus Coprovivens" — "Candidatus Faecivivens" — "Candidatus Fimivivens" — "Candidatus Limivivens" — Litorisediminivivens — Litorivivens — Marivivens — "Candidatus Merdivivens" — "Candidatus Onthovivens" — Pontivivens — "Candidatus Porivivens" — "Candidatus Scatovivens"
Agarivorans — "Candidatus Alkanivorans" — Anaeropeptidivorans — Chelativorans — Methanomethylovorans — "Candidatus Methanovorans" — Mucinivorans — Polycyclovorans — "Taurinivorans"