. Bonner zoologische Beiträge : Herausgeber: Zoologisches Forschungsinstitut und Museum Alexander Koenig, Bonn. Biology; Zoology. 240 Katharina Hándellr & Heike Wacíple: Phylogeny of Saeogiossa fore Elysiella ¡ntsUla is named from liereon as Elysia piisil- la (Bergh, 1872). Several species, described under the genus name Elysia (Elysia dubia Eliot, 1904, Elysia luil- imedae Macnae, 1954, Elysia latipes Marcus & Marcus, 1960 and Elysia maciiaei Marcus, 1982) are mentioned to be synonymous to Elysiapiisilla (see Jensen & Wells 1990). Marcus du Bois-Reymond (1980) distinguished materi
. Bonner zoologische Beiträge : Herausgeber: Zoologisches Forschungsinstitut und Museum Alexander Koenig, Bonn. Biology; Zoology. 240 Katharina Hándellr & Heike Wacíple: Phylogeny of Saeogiossa fore Elysiella ¡ntsUla is named from liereon as Elysia piisil- la (Bergh, 1872). Several species, described under the genus name Elysia (Elysia dubia Eliot, 1904, Elysia luil- imedae Macnae, 1954, Elysia latipes Marcus & Marcus, 1960 and Elysia maciiaei Marcus, 1982) are mentioned to be synonymous to Elysiapiisilla (see Jensen & Wells 1990). Marcus du Bois-Reymond (1980) distinguished material identified as Elysia halimedae by Baba (1957) and Burn (1972) from the original E. halimedae Macnae, 1954 from South Africa by the presence of papillate rhinophores in the latter. She re-named the material niisidcntified as E. halimedae and established the name E. maciiaei Marcus, 1980. Our study includes a specimen from the Zoologische Staatssammlung München, collect- ed in Sulawesi and identified by courtesy by Michael Schrödi as E. macnaei. This specimen does not group with Elysia pusilla indicating that E. macnaei is not synony- mous with E. pusilla. Comparing our results with the only available phyloge- netic hypothesis on Sacoglossa elaborated by Jensen (1996), the results of the Maximum Likelihood analysis come closest to her results. Both analyses support mono- phyly of the Plakobranchacea, Plakobranchoidea, Plako- branchidae as well as the genera Elysia (with Elysiella as a synonym) and Thuridilla. Plakobranchus and Bösel lia form distinct evolutionary lines. Juliidae are also mono- phyletic. The two hypotheses contradict in the paraphyly (this study) versus monophyly (Jensen 1996) of the Oxynoacea, Oxynoidae and Limapontiidae. But it has to be emphasized that these taxa are underrepresented in our study and ftiture analyses have to be performed with more representatives of these groups. Furthennore, other genes have to be used for analysing deeper nodes of S
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