Hydromermis achrorovi
Hydromermis acuminata
Hydromermis acutipenis
Hydromermis albicola
Hydromermis albionis
Hydromermis amblyospicula
Hydromermis amphidis
Hydromermis angusta
Hydromermis angusticauda
Hydromermis annulosa
Hydromermis bathycola
Hydromermis biesboeri
Hydromermis bostrycodes
Hydromermis brevicaudata
Hydromermis catena
Hydromermis chasmogama
Hydromermis churchillensis
Hydromermis cognata
Hydromermis conopophaga
Hydromermis contorta
Hydromermis conura
Hydromermis crassispicula
Hydromermis dacica
Hydromermis doloresi
Hydromermis floridensis
Hydromermis fluviatilis
Hydromermis gastrofaga
Hydromermis gastroviridis
Hydromermis grandis
Hydromermis haggardi
Hydromermis illiensi
Hydromermis itascensis
Hydromermis kirjanovae
Hydromermis lanceicephala
Hydromermis leptoposthia
Hydromermis longicaudata
Hydromermis macroovata
Hydromermis macrospiculatus
Hydromermis micronura
Hydromermis minutissima
Hydromermis multicauda
Hydromermis orbicaudata
Hydromermis osami
Hydromermis palustris
Hydromermis pamirensis
Hydromermis philopsychra
Hydromermis polycarpa
Hydromermis porosamphidis
Hydromermis pratensis
Hydromermis pseudocontorta
Hydromermis sibirica
Hydromermis sitaensis
Hydromermis soodlensis
Hydromermis tanytarsis
Hydromermis transversalis
Hydromermis tshudskoensis
(tree size 1)
Hydromermis uralensis
Hydromermis uterina
Hydromermis viridis
Hydromermis welchi
Hydromermis borokii