Abstract
From a survey of the interstitial fauna at Giglio, Italy, the new species Symsagittifera smaragdina sp. nov., (Sagittiferidae) is described. We herein transfer the genus Praesagittifera and its three species P. gracilis (Yamasu, 1982), P. naikaiensis (Yamasu, 1982), and P. shikoki Kostenko & Mamkaev, 1990 to the family Convolutidae. In addition the diagnosis for the family Sagittiferidae is revised to include only those species possessing sagittocysts in adult specimens.
References
Baguñà, J., Ruiz-Trillo, I., Paps, J., Loukota, M., Ribera, C., Jondelius, U., Riutort, M. (2001) The first Bilaterian organisms: simple or complex? New Molecular evidence. International Journal of Developmental Biology, 45, 133–134 Suppl. 1.
Bartolomaeus, T. & Balzer I. (1997) Convolutriloba longifissura nov. spec. (Acoela) - the first case of longitudinal fission in Platyhelminthes. Microfauna Marina, 11, 7–18.
Beklemischev, V.N. (1957) Convoluta psammophila n. sp. and juvenile oligomerisation of cellular elements in acoel turbellarians [In Russian, French summary]. Trudy Leningradskogo Obshchestvo Estestvoispitatelei, 73, 5–14.
Brüggemann, J. (1985) Ultrastructure and formation of the bursa mouthpiece of Philocelis cellata (Plathelminthes, Acoela). Hydrobiologia, 128, 23–30.
Crezée, M. (1975) Monograph of the Solenofilomorphidae (Turbellaria: Acoela). International Revues der gesamten Hydrobiologie, 60, 769–845.
Eisenman, E.A. & Alfert, M. (1982) A new fixation procedure for preserving the ultrastructure of marine invertebrate tissues. Journal of Microscopy, 125, 117–120.
Faubel, A., Kawakatsu, M., Froehlich, E.M., Jones, H.D., Sasaki, G. (2004) The present status of taxonomic studies on Acoela (Platyhelminthes) in Japan, continuation from the 'Occ. Publ., Biol. Lab. Fuji Women's College, Sapporo, http://planarian.net/kswp/42/acoela.pdf
Graff, L. (1891) Die Organisation der Turbellaria Acoela, Verlag von Wilhelm Engelmann, Leipzig, 90 pp.
Gschwentner, R., Ladurner, P., Salvenmoser, W., Rieger, R.M. & Tyler S. (1999) Fine structure and evolutionary significance of sagittocysts of Convolutriloba longifissura (Acoela, Platyhelminthes). Invertebrate Biology, 118, 332–345.
Gschwentner, R., Baric, S., Rieger, R.M. (2002) New model for the formation and function of sagittocysts: Symsagittifera corsicae n. sp. (Acoela). Invertebrate Biology, 121(2), 95–103.
Hendelberg, J. & Åkesson, B. (1988) Convolutriloba retrogemma gen. et sp. n., a turbellarian (Acoela, Platyhelminthes) with reversed polarity of reproductive buds. Fortschritte der Zoologie, 36, 321–327.
Hooge, M.D., Haye, P.A.., Tyler, S., Litvaitis, M.K. & Kornfield, I. (2002) Molecular systematics of the Acoela (Acoelomorpha, Platyhelminthes) and its concordance with morphology. Molecular Phylogenetics and Evolution, 24, 333–342.
Hooge M.D. & Tyler S. (2005) New tools for resolving phylogenies: a systematic revision of the Convolutidae (Acoelomorpha, Acoela). Journal of Zoological Systematics and Evolutionary Research, 43(2), 100–113.
Hooge M.D. & Tyler S. (2001) Interstitial acoels (Platyhelminthes: Acoela) from Bermuda. Proceedings of the Biological Society of Washington, 114(2), 414–426.
International Commission on Zoological Nomenclature, International Code of Zoological Nomenclature, 4th ed. 1999. International Trust for Zoological Nomenclature, London, 306 pp.
Ivanov, A.V. (1952) Turbellaria (Acoela) from the southern coast of Sakhalin (in Russian, no English summary) ((Oxyposthia praedator n. gen., n. sp.; Otocelis sachalinensis n. sp.; Convoluta sagittifera n.sp.)). Trudy Instituta Zoologicheskoro Akademiia Sciencyi USSR, 12, 40–132.
Jondelius, U., Ruiz-Trillo, I., Baguñà, J. & Riutort, M. (2001) The Nemertodermatida are basal bilaterians not members of Platyhelminthes. Zoologica Scripta, 31, 201–215.
Kato, K. (1951) Convoluta, an Acoelous Turbellarian, Destroyed the Edible Clam. [in Japanese, translated title and notes by Kawakatsu]. Miscellaneaus Reports of the Research Institute for Natural Resources, Nos. 19–21, 64–67.
Kostenko, A.G. & Mamkaev, Y.V. (1990) The position of green convoluts in the system of acoel turbellarians (Turbellaria, Acoela). 1. Simsagittifera gen. n. Zoologicheskii Zhurnal (Moscow), 69(6), 11–21.
Kostenko, A.G. & Mamkaev Y.V. (1990) The position of green convoluts in the system of acoel turbellarians (Turbellaria, Acoela). 2. Sagittiferidae fam. n. Zoologicheskii Zhurnal (Moscow), 69(7), 5–16.
Kozloff, E.N. (1998) Acoel flatworms (Platyhelminthes) from the ancient Punic Ports of Carthage, at Salammbo, Tunisia. Cahiers de Biologie Marine, 39, 15–28.
Ladurner, P., Schärer, L., Salvenmoser, W. & Rieger R.M. (2005) A new model organism among the lower Bilateria and the use of digital microscopy in taxonomy of meiobenthic Platyhelminthes: Macrostomum lignano, n. sp. (Rhabditophora, Macrostomorpha). Journal of Zoological Systematics and Evolutionary Research, 43(2), 114–126.
Mamkaev, Y.V. & Kostenko, A.G. (1991) On the phylogenetic significance of sagittocysts and copulatory organs in acoel turbellarians. Hydrobiologia, 227, 307–314.
Mamkaev Y.V. (1971) On the Convoluta (Turbellaria, Acoela) from the South Primorsk. Fauna and Flora of the Possjet Bay of the Sea of Japan. Acad. Sci. USSR Zool Inst., St. Petersburg, Explorations of the Fauna of the Seas, 8 (10/6), 31–54.
Marcus Bois-Reymond, E. (1957) On Turbellaria. Anais de Academia Brasileira de Ciencias, 29, 153–191.
Marcus, E., Macnae, W. (1954) Architomy in a Species of Convoluta. Nature, London, 173, 130
Richardson, K.L., Jaret, L. & Finke E.H. (1960) Embedding in epoxy resins for ultra thin sectioning in electron microscopy. Stain Technology, 35, 313–325.
Ruiz-Trillo, I., Riutort, M., Fourcade, H.M., Baguñà, J. & Boore J.L. (2004) Mitochondrial genome data support the basal position of Acoelomorpha and the polyphyly of the Platyhelminthes. Molecular Phylogenetics and Evolution, 33(2), 321–32.
Ruiz-Trillo, I., Paps, J., Loukota, M., Ribera, C., Jondelius, U., Baguñà, J. and Riutort, M. (2002) A phylogenetic analysis of myosin heavy chain type II sequences corroborates that Acoela and Nemertodermatida are basal bilaterians. Proceedings of the Royal Society, 99(17), 11246–11251.
Ruiz-Trillo, I., Riutort, M., Littlewood, D.T., Herniou, E.A. & Baguñà, J. (1999), Acoel flatworms: earliest extant bilaterian Metazoans, not members of Platyhelminthes. Science, 283(5409), 1919–1923.
Schärer, L., Joss, G. & Sandner, P. (2004) Mating behaviour of the marine turbellarian Macrostomum sp.: these worms suck. Marine Biology, 145, 373–380.
Schmidt, O. (1852) Neue Rhabdocoelen aus dem nordischen und dem adriatischen Meere. Sitzungsbericht der mathematisch-naturwissenschaftlichen Classe der kaiserlichen Akademie der Wissenschaften zu Wien, 9, 490–505.
Telford, M.J., Lockyer, A.E., Cartwright-Finch, C. & Littlewood, D.T. (2003) Combined large and small subunit ribosomal RNA phylogenies support a basal position of the acoelomorph flatworms. Proceedings of the Royal Society London, 270, 1077–1083.
Winsor, L. (1990) Marine Turbellaria (Acoela) from North Queensland. Memoirs of the Queensland Museum, 28(2), 785–800.
Yamasu, T. (1982) Five new species of acoel flat worms from Japan. Galaxea, 1, 29–43.
Yamasu, T. (1991) Fine structure and function of ocelli and sagittocysts of acoel flatworms. Hydrobiologia, 227, 273–282.