Kalmar "Genus Hydromantes" tana nufin rarrabuwa taxonomic a cikin ilmin halitta wanda ke cikin dangin Pletodontidae, wanda ya haɗa da ƙungiyar salamanders da aka sani da "mazaunan ruwa" ko "masu neman ruwa". Halittar Halittar Hydromantes ta ƙunshi ƙungiyar salamanders marasa huhu waɗanda ake samu a tsaunukan California, Oregon, da Mexico. Wadannan salamanders sun dace da zama a cikin yanayin jika kuma suna da siffofi na musamman, irin su wutsitsin wutsiya da tsayin jiki, wanda ke ba su damar tafiya cikin sauƙi ta cikin ruwa.