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Notogynaphallia caissara (E.M. Froehlich, 1955) and N. fita (Froehlich, 1959) are redescribed. Both species are included in the so-called group 2 of E.M. Froehlich & Leal-Zanchet (2003), in Notogynaphallia, and are provided with a cephalic retractor muscle derived from the ventral longitudinal subepidermic muscle layer. A muscle retractor does not exist in the type-species of the genus. This is strong evidence of the morphological heterogeneity within the genus, as E.M. Froehlich & Leal-Zanchet (2003) previously proposed mainly based on characters of the reproductive organs. Redescrevem-se N. caissara (E.M. Froehlich, 1955) e N. fita (Froehlich, 1959), reunidas no chamado grupo 2 de E.M. Froehlich & Leal-Zanchet (2003), dentro de Notogynaphallia. Ambas as espécies possuem um músculo retrator cefálico derivado da musculatura subepidérmica longitudinal ventral. A presença deste retrator nas duas espécies, mas não na espécie-tipo do gênero, é uma evidência consistente da heterogeneidade morfológica do gênero, como previamente sugerido por E.M. Froehlich & Leal-Zanchet (2003) com base em características dos órgãos reprodutores

revista brasileira de zoologia

Redescription of two land planarian species of Notogynaphallia Ogren &amp; Kawakatsu (Platyhelminthes, Tricladida, Geoplaninae) and confirmation of the heterogeneity of the genus