Pneumobranchia

plural noun
Pneu·​mo·​branchia | \ˌn(y)üməˈbraŋkēə\
variants: or Pneumobranchiata \-​ˌbraŋkēˈätə, -​ätə \

Definition of Pneumobranchia 

in former classifications

: a group of terrestrial snails (suborder Rhipidoglossa) comprising those (as members of the genus Helicina) in which the gills are replaced by a respiratory sac

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History and Etymology for Pneumobranchia

New Latin, from pneum- + -branchia or branchiata

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