Table 3

Subfamilial placement of the Cuatro Ciénegas hydrobiid genera (based on the results of this study) contrasted with those of Taylor (1966a)

Taylor (1966a)	This study
Family Hydrobiidae	Family Hydrobiidae
Subfamily Cochiliopinae	Subfamily Littoridininae
Coahulix (1)	Coahulix (1)
Coachliopina	Paludiscala (1)
Subfamily Littoridininae	Mexithauma (1)
Mexipyrgus (1)	Coachliopina
Duragonella	Duragonella
Subfamily Nymphphilinae	Mexipyrgus (1)
Nymphophilus (1)	Subfamily Nymphphilinae
Subfamily Mexithaumatinae	Nymphophilus (1)
Mexithauma (1)	"Stobia" (3)
Subfamily Paludiscalinae	Subfamily Unknown
Paludiscala (1)	Orygocerus(?)(4)

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(1) Genus endemic to the basin
(2) Subfamily considered endemic by Taylor (1966a)
(3) New Genus
(4)Systematic status uncertain