Doris verrucosa Linnaeus, 1758 is the type species of Doris, the type genus of Dorididae. Its currently accepted distribution includes the Mediterranean, Eastern (Europe and Africa) and Western Atlantic (Massachusetts, USA to Santa Catarina, Brazil). Until now, papers on the anatomy of this species dealt with restricted characters such as rhinophores, radula and reproductive organs, never comparing specimens from different localities. In this study we have examined the anatomy of species similar to D. verrucosa from the Brazilian coast, and compared them with samples of D. verrucosa from Europe, the type locality. After an extensive complementary anatomical study of the circulatory, excretory, digestive, reproductive and nervous systems, the identity of the Brazilian specimens is clarified, proving that they belong to a different species. To solve the consequent nomenclatural gap, we revalidate Staurodoris januarii Bergh, 1878, described from Brazil, transferred to the genus Doris. The nominal species Doris verrucosa is, therefore, restricted to European waters.

Three specimens of the genus Corambe were found in the intertidal zone of Santos, São Paulo (Brazil); two of them were identified as C. evelinae and one as C. carambola. Both species are reported for the first time since more than about 40 years ago.

Tyrinna evelinae (Er. Marcus, 1958) MZSP/CAS Família Discodorididae Jorunna spazzola (Er. Marcus, 1955) MZSP/CAS (*) Discodoris boholiensis Bergh, 1877 CAS-IZ Discodoris branneri (Er. Marcus, 1955) MZSP Platydoris angustipes (Mörch, 1863) MZSP/CAS Platydoris sp. MZSP (*) Diaulula sandiegensis (Cooper, 1862) USNM/CAS Montereina greeleyi (MacFarland, 1909) MZSP/CAS Discodoris pusae (Er. Marcus, 1955) MZSP Thordisa ladislavii (Ihering, 1886) MZSP (*) Sclerodoris tuberculata Eliot, 1903 MZSP/CAS Sclerodoris sp. BR MZSP

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Platydoris angustipes (Mörch, 1863) is a common nudibranch in the Western Atlantic, ranging from Florida, USA, to Rio de Janeiro, Brazil. In this study, we examined the anatomy of P. angustipes along its distribution, including its type material. Our analysis shows consistent differences between the Caribbean and Brazilian populations, mainly in the reproductive system, radular teeth and odontophore musculature. This strongly suggests that the two populations actually belong to distinct species. The Brazilian population is described herein as a new species, Platydoris guarani sp. n.

The genus Doris in Brazilian shelf is represented by four species: Doris verrucosa, Doris bovena, Doris ilo e Doris kyolis. This species have a misunderstood taxonomy. In this study was carried out a taxonomy revision, utilizing comparative anatomy and previous literature data. As a result, was possible to separate D. verrucosa in two species, maintaining D. verrucosa with distribution to Europe and Mediterranean Sea, whereas Doris januarii, a revalidated synonym, is restricted in Brazilian Atlantic coast. In addition, anatomical data complementary validates the species status of D. bovena, D. ilo e D. kyolis. The distinctive anatomical characteristics that justify the separation among these species are found in the following structures: odontophore, radula, reproductive system and nervous system.

The terebrid gastropod Hastula hastata (Gmelin, 1791) is reported for the first time from Trindade Island, off southeastern Brazil. The new record extends the known geographic range of the species ca. 1,167 km eastward from Vitória, Espírito Santo state.

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