Abstract
Records of free-living flatworms (turbellarians) from Tunisian waters are scattered. Based on new material and published accounts, an annotated checklist of free-living flatworm species from Tunisian waters is provided. A total of 29 species is recorded, including 18 species with new material and 11 species only from literature records. For each species, information on systematics, habitats and distribution is supplied, together with taxonomic or biological remarks. Three species, the acotylean polyclads Cestoplana rubrocinta Lang, 1884 and Comoplana agilis (Lang, 1884) as well as the marine triclad Cercyra hastata Schmidt, 1861 are recorded for the first time in Tunisia. The controversial occurrence of the leptoplanid polyclad Leptoplana tremellaris in the Mediterranean is supported with histological sections and embryological data. The proseriate Monocelis fusca Örsted, 1843 previously reported from Tunisia is considered to be a misidentification.
By presenting a checklist of the recorded species, this work summarizes our current knowledge of the turbellarian fauna diversity in Tunisia, providing baseline data for future biogeographical, ecological, behavioral and evolutionary investigations.
References
Ax, P. (1959) Zur Systematik, Ökologie und Tiergeographie der Turbellarienfauna in den ponto-kaspischen Brackwassergebieten. Zoologische Jahrbücher für Systematik, 87, 43–184.
Ball, I.R. & Reynoldson, R.B. (1981) British Planarians. Platyhelminthes: Tricladida. Cambridge University Press, Cambridge, 141 pp.
Ball, I.R. (1983) Planarians, plurality and biogeographical explanations. In: Simms, R.W., Price, J.H. & Whalley, P.E.S. (Eds.), In Evolution, Time and Space: The Emergence of the Biosphere. Academic Press, London, pp. 409–430.
Beauchamp, P. dea (1932) Sur une collection de turbellariés d'eau douce (Triclades) du Maroc, rassemblée par Robert Pn. Dollfus. Bulletin de la Société des Sciences Naturelles du Maroc, 12, 221–222.
Beauchamp, Pde. (1934) Quelques Turbellariés des Balkans et d'Asie mineure. Bulletin de la Société Zoologique de France, 59, 203–209.
Benazzi, M. (1933) Notizie biologico-faunistiche sulle Tricladi delle Alpi Piemontesi. Bollettino dei musei di zoologia ed anatomia comparata della Università di Torino, 43, 297–311.
Benazzi, M. (1957) Cariologia di Dugesia lugubris (Schmidt) (Tricladida Paludicola). Caryologia, 10, 276–303.
https://doi.org/10.1080/00087114.1957.10797624Benazzi, M., Baguna, J., Ballester, R. & Del Papa, R. (1975) Further contribution to the taxonomy of the "Dugesia lugubris-polychroa group" with description of Dugesia mediterranea n.sp. (Tricladida, Paludicola). Bollettino di Zoologia, 42, 81–89.
https://doi.org/10.1080/11250007509430132Beukeboom, L.W., Weinzierl, R.P., Reed, K.M. & Michiels, N.K. (1996) Distribution and origin of chromosomal races in the freshwater planarian Dugesia polychroa (Turbellaria: Tricladida). Hereditas, 124, 7–15.
https://doi.org/10.1111/j.1601-5223.1996.00007.xBlanchard, E. (1847) Recherches sur l'organisation des vers. Annales des Sciences Naturelles, 8, 271–275.
https://doi.org/10.5962/bhl.title.51506Bock, S. (1913) Studien ueber Polycladen. Zoologiska bidrag fran Uppsala, 2, 29–344.
Brusca, G.J. (1975) General patterns of invertebrate development. Mad River Press, Eureka, California, 134 pp.
Brusa, F., Damborenea, C. & Quiroga, S. (2009) First records of Pseudocerotidae (Platyhelminthes: Polycladida: Cotylea) from Patagonia, Argentina. Zootaxa, 2283, 51–59.
Bytinski-Salz, H. (1935) Un policlado (Sylochus pilidium Lang) dannoso ai parchi ostricoli. Thalassia, 2, 1–24.
Cannon, L.R.G. (1986) Turbellaria of the World. A Guide to Families & Genera. Queensland. Museum, South Brisbane, 136 pp.
Cannon, J., Vellutini, B.C., Smith, J., Ronquist, F., Jondelius, U. & Hejnol, A. (2016) Xenacoelomorpha is the sister group of Nephrozoa. Nature, 530, 8993.
https://doi.org/10.1038/nature16520Chandebois, R. (1954) Sur Procerodes dohrni Wilhelmi, triclade marine nouvelle pour la faune de France et les caractères qui la distinguent de Procerodes lobata O. Schmidt. Bulletin de la Société Zoologique de France, 79, 134–137.
Charbagi-Barbirou, K., Álvarez-Presas, M., Vila-Farré, M., Gammoudi, M., Tekaya, S. & Riutort, M. (2011) Marine triclads (Platyhelminthes, Tricladida, Maricola), a preliminary molecular approach to their phylogeny. Cahiers de Biologie Marine, 52, 303–311.
Charni, M., Harrath, A.H., Sluys, R., Tekaya, S. & Zghal, F. (2004) The freshwater planarian Dugesia sicula Lepori, 1948 (Platyhelmintes, Tricladida) in Tunisia: ecology, karyology, and morphology. Hydrobiologia, 517, 161–170.
https://doi.org/10.1023/B:HYDR.0000027344.07747.f7Charni, M., Ben Ammar, A., Jaafoura, M.H., Zghal, F. & Tekaya, S. (2011a) Spermatogenesis and spermatozoon ultrastructure in Dugesia sicula Lepori, 1948 (Platyhelminthes, Tricladida, Paludicola). Belgian Journal of Zoology, 140, 118–125.
Charni, M., Ben Ammar, A., Jaafoura, M.H., Zghal, F. & Tekaya, S. (2011b) Ultrastructure of germaria and vitellaria in Dugesia sicula Lepori, 1948 (Platyhelminthes, Tricladida, Paludicola). Belgian Journal of Zoology, 140, 111–118.
Çinar, M.E. (2014) Checklist of the phyla Platyhelminthes, Xenacoelomorpha, Nematoda, Acanthocephala, Myxozoa, Tardigrada, Cephalorhyncha, Nemertea, Echiura, Brachiopoda, Phoronida, Chaetognatha, and Chordata (Tunicata, Cephalochordata, and Hemichordata) from the coasts of Turkey. Turkish Journal of Zoology, 38, 698–722.
https://doi.org/10.3906/zoo-1405-70Claparede, E. (1863) Beobachtungen über Anatomie und Entwicklungsgeschichte wirbelloser Thiere an der Küste von Normandie angestellt von A. Rene Edouard Claparede. Engelmann, Leipzig, 120 pp.
Curini-Galletti, M., Campus, P. & Delogu, V. (2008) Theama mediterranea sp. nov. (Platyhelminthes, Polycladida), the first interstitial polyclad from the Mediterranean. Italian Journal of Zoology, 75 (1), 77–83.
https://doi.org/10.1080/11250000701690525Dahm, A.G. (1958) Taxonomy and ecology of five species-groups in the family Planariidae (Turbellaria Tricladida Paludicola). Nya Litografen, Malmö, 241 pp.
Delogu, V. & Curini-Galletti, M. (2009) The Parotoplana jondelii species-group (Platyhelminthes: Proseriata): a microturbellarian radiation in the Mediterranean. Contributions to Zoology, 78 (3), 99–112.
Devries, E.J. (1985) The biogeography of the genus Dugesia (Turbellaria, Tricladida, Paludicola) in the Mediterranean region. Journal of Biogeography, 12, 509–518.
https://doi.org/10.2307/2844906Domenici, L., Galleni, L. & Gremigni, V. (1975) Electron microscopical and cytochemical study of eggshell globules in Notoplana alcinoi (Turbellaria, Polycladida). Journal of submicroscopic cytology and pathology, 7, 239–247.
Du Plessis, G. (1907) Etude sur la Cercyra verrucosa nov. Nouvelle triclade marine. Revue Suisse de Zoologie, 15, 129–140.
Egger, B., Ladurner, P., Nimeth, K., Gschwentner, R. & Rieger, R. (2006) The regeneration capacity of the flatworm Macrostomum lignano on repeated regeneration, rejuvenation and the minimal size needed for regeneration. Development Genes and Evolution, 216, 565–557.
https://doi.org/10.1007/s00427-006-0069-4Egger, B., Gschwentner, R. & Rieger, R. (2007) Free-living flatworms under the knife: past and present. Development Genes and Evolution, 217, 89–104.
https://doi.org/10.1007/s00427-006-0120-5Egger, B., Lapraz, F., Tomiczek, B., Muller, S., Dessimoz, C., Girstmair, J., Skunca, N., Rawlinson, K.A., Cameron, C.B., Beli, E., Todaro, M.A., Gammoudi, M., Noreña, C. & Telford, M.J. (2015) A Transcriptomic-Phylogenomic Analysis of the Evolutionary Relationships of Flatworms. Current Biology, 25, 1347–1353.
https://doi.org/10.1016/j.cub.2015.03.034Ehlers, U. (1985) Das Phylogenetische System der Plathelminthes. Gustav Fischer Verlag, Stuttgart, New York, 317 pp.
Evans, W. (1905) Rhynchodemus terrestris in the Edinburgh district. Annals of Scottish natural history, 53, 57–58.
Faubel, A. (1983) The Polycladida, Turbellaria. Proposal and establishment of a new system. Part I. The Acotylea. Mitteilungen des hamburgischen zoologischen Museums und Instituts, 80, 17–121.
Faubel, A. & Warwick, R.M. (2005) The marine flora and fauna of the Isles of Scilly: free-living Plathelminthes (‘Turbellaria’). Journal of Natural History, 39, 1–45.
https://doi.org/10.1080/00222930310001613593Fleming, J. (1823) Gleanings of Natural History, gathered on the coast of Scotland during a voyage in 1821. Edinburgh Philosophical Journal, 8, 297–303.
Fuhrmann, O. (1894) Die Turbellarien der Umgebung von Basel. Inaugural-Dissertation. Revue Suisse de Zoologie, 2, 213–292.
Galleni, L. (1976) Polyclads of the Tuscan coasts. II. Stylochus alexandrinus Steinboeck and Stylochus mediterraneus n. sp. from the rocky shores near Pisa and Livorno. Bolletino di Zoologia, 43, 15–25.
https://doi.org/10.1080/11250007609434882Galleni, L. (1978) Policladi delle coste toscane. III. Echinoplana celerrima Haswell, Planoceridae nuovo per il Mediterraneo e note sul genere. Echinoplana.Atti. Atti della Società Toscana de Scienze Naturali di Pisa, 85, 139–148.
Galleni, L., Tongiorgi, P., Ferrero, E. & Salghetti, U. (1980) Stylochus mediterraneus (Turbellaria: Polycladida), predator on the mussel Mytilus galloprovincialis. Marine Biology, 55, 317–326.
https://doi.org/10.1007/BF00393784Gamble, F.W. (1893a) The Turbellaria of Plymouth Sound and the neighbourhood. Journal of the Marine Biological Association of the United Kingdom, 3, 30–47.
https://doi.org/10.1017/S0025315400049547Gamble, F.W. (1893b) Contributions to a knowledge of British marine Turbellaria. Quarterly Journal of Microscopical Science, 34, 433–528.
Gammoudi, M., Tekaya, S. & Noreña, C. (2009) Contribution to the knowledge of Acotylean Polyclads (Platyhelminthes Polycladida) from Tunisian Coasts. Zootaxa, 2195, 43–60.
Gammoudi, M. & Tekaya, S. (2012) Distribution en Méditerranée occidentale de quelques polyclades (plathelminthes). Bulletin de la Société Zoologique de France, 137 (1–4), 197–213.
Gammoudi, M., Ben Rached, B. & Tekaya, S. (2011) les polyclades (plathelminthes de vie libre) du nord de la Tunisie: Inventaire et distribution. Bulletin de l’Institut National des Sciences et Technologie de la Mer de Salammbô, 38, 83–88.
Gammoudi, M., Noreña, C., Tekaya, S., Prantl, V. & Egger, B. (2012a) Insemination and embryonic development of some Mediterranean polyclad flatworms. Invertebrate Reproduction and Development, 56 (4), 272–286.
https://doi.org/10.1080/07924259.2011.611825Gammoudi, M., Egger, B., Tekaya, S. & Noreña, C. (2012b) The genus Leptoplana (Leptoplanidae, Polycladida) in the Mediterranean basin. Redescription of the species Leptoplana mediterranea (Bock, 1913) comb. nov. Zootaxa, 3178, 45–56.
Gammoudi, M., Ben Ahmed, R., Bouriga, N., Ben-Attia, M. & Harrath, A.H. (2016a) Predation by the polyclad flatworm Imogine mediterranea on the cultivated mussel Mytilus galloprovincialis in Bizerta Lagoon (northern Tunisia) Aquaculture Research, 48 (4), 1608–1617.
https://doi.org/10.1111/are.12995Gammoudi, M., Ben Ahmed, R., Ahmed, M., Sayed, S.R., Alwasel, S.H., Tekaya, S. & Harrath, A.H. (2016b) Ultrastructural study of oogenesis in the acotylean Echinoplana celerrima, (Platyhelminthes, Polycladida). Zoologischer Anzeiger, 260, 72–77.
https://doi.org/10.1016/j.jcz.2016.01.005Gauthie, H. (1923) Observations sur quelques Planaires d'Algérie. Bulletin de la Société d'histoire naturelle de l'Afrique du Nord, 14, 30–34.
Girstmair, J., Schnegg, R., Telford, M.J. & Egger, B. (2014) Cellular dynamics during regeneration of the flatworm Monocelis sp. (Proseriata, Platyhelminthes). Evo Devo, 5, 37.
https://doi.org/10.1186/2041-9139-5-37Harrath, A.H., Tekaya, S. & Zghal, F. (2001) Biodiversity of freshwater planarians (Turbellaria, Tricladida) from Tunisia . Bulletin de la Société zoologique de France, 126 (12), 228–229.
Harrath, A.H., Charni M, Sluy,s R., Zghal, F. & Tekaya, S. (2004) Ecology and distribution of the freshwater planarian Schmidtea mediterranea in Tunisia. Italian Journal of Zoology, 71, 233–236.
https://doi.org/10.1080/11250000409356577Harrath, A.H., Alwasal, S., Alahzza, I., Zghal, F. & Tekaya, S. (2011) Etude ultrastructurale de l’ovogenese chez la planaire Schmidtea mediterranea (Plathelminthe,Paludicole). An ultrastructural study of oogenesis in the planarian Schmidtea mediterranea (Platyhelminthes, Paludicola). Comptes Rendus Biologies, 334 (7), 516–525.
https://doi.org/10.1016/j.crvi.2011.03.009Harrath, A.H., Sluys, R., Merzoug, D., Yacoubi-Khbeiza, M., Alwasal, S. & Riutort, M. (2012a) Freshwater planarians (Platyhelminthes, Tricladida) from the Palearctic section of the African continent: new records, with the description of a new species. Zootaxa, 3182, 1–15.
Harrath, A. H., Sluys, R., Alwasel, S., Zghal, F. & Tekaya, S. (2012b). Ultrastructure of spermatogenesis and mature spermatozoon of the freshwater planarian Schmidtea mediterranea (Platyhelminthes, Paludicola). Comptes Rendus Biologies, 335, 87–95.
https://doi.org/10.1016/j.crvi.2011.11.005Harrath, A.H., Sluys, R., Ghlala, A. & Alwasel, S. (2012 c) The first subterranean freshwater planarians from North Africa, with an analysis of adenodactyl structure in the genus Dendrocoelum (platyhelminthes, tricladida, dendrocoelidae). Journal of Cave and Karst Studies, 74 (1), 48–57.
https://doi.org/10.4311/2011LSC0215Harrath, A.H., Ahmed, M., Sayd, S.R., Saifi, M.A. & Alwasal, S. (2013) Ultrastructural study of oogenesis and cell dynamics during cocoon secretion in the subterranean freshwater planarian Dendrocoelum constrictum (Platyhelminthes, Paludicola). Tissue Cell, 45, 39–46.
https://doi.org/10.1016/j.tice.2012.09.003Harrath, A.H., Gammoudi, M., Mansour, L., Ahmed, M., Sirotkin, A.V., Al Omar, S.Y., Ibrahim, K.E. & Alwasel, S.H. (2014) Investigation of the ultrastructure of Dendrocoelum constrictum (Platyhelminthes, Tricladida) spermatogenesis and mature spermatozoa. Comptes Rendus Biologies, 337, 513–520.
https://doi.org/10.1016/j.crvi.2014.07.004Hartog, C. Den (1968) Marine triclads from the Plymouth area. Journal of the Marine Biological Association of the United Kingdom, 48, 209–223.
https://doi.org/10.1017/S0025315400032549Harms, J. (1993) Check list of species (algae, invertebrales and vertebrales) found in the vicinity of the island of Helgoland (North Sea, German Bight)- a review of recent records. Helgoländer Wissenschaftliche Meeresuntersuchungen, 41, 1–34.
https://doi.org/10.1007/BF02366182Haswell, W.A. (1907) Observations on Australian polyclads. Transactions of the Linnean Society of London, 9, 465–485.
https://doi.org/10.1111/j.1096-3642.1907.tb00455.xHolleman, J. (2007) Some New Zealand Polyclads (Platyhelminthes, Polycladida). Zootaxa, 1560, 1–17.
Howson, C.M. & Picton, B.E. (1997) The species directory of the marine fauna and flora of the british isles and surrounding seas. Ulster Museum and the marine conservation society, Belfast and Ross-on Wye Ulster museum publication 276, 1–508.
Hyman, L.H. (1951) The invertebrates: Platyhelminthes and Rhynchocoela. The acoelomate Bilateria. Vol. II. McGraw-Hill, New York, 550 pp.
Johnston, E.L. & Lee, K.M. (2008) Brooding behaviour and reproductive success in two species of free-living simultaneous hermaphrodites. Marine Biology, 155, 555–561.
https://doi.org/10.1007/s00227-008-1056-2Karez, R. (1991) Die Besiedlung sublitoraler Rotalgen am Felssockel von Helgoland. Dipl Arb Univ Marburg, 143 pp.
Kato, K. (1937) Polyclads collected in Idu, Japan. Japanese Journal of Zoology, 7, 211–232.
Kato, K. (1944) Polycladida of Japan. Journal Sigenkagaku Kenkyusyo, l, 257–318.
Keferstein, W. (1868) Beitraege zur Anatomie und Entwicklungsgeschichte einiger Seeplanarien von St. Malo. Abhandlungen der Königlichen Gesellschaft der Wissenschaften zu Göttingen, 14, 1–38.
Kolasa, J. (2001) Flatworms: Turbellaria and Nemertea. In: Thorp, J.H. & Covich, A.P. (Eds.), Ecology and Classification of North American Freshwater Invertebrates. Academic Press, New York, pp. 155–180.
https://doi.org/10.1016/B978-012690647-9/50007-7Lázaro, E.M. & Riutort, M. (2013) Dugesia sicula (Platyhelminthes, Tricladida): the colonizing success of an asexual Planarian. BMC Evolutionary Biology, 13, 268.
https://doi.org/10.1186/1471-2148-13-268Lázaro, E.M., Harrath, A.H., Stocchino, G.A., Pala, M., Bagunà, J. & Riutort, M. (2011) Schmidtea mediterranea phylogeography: an old species surviving on a few Mediterranean islands? BMC Evolutionary Biology, 11, 274.
https://doi.org/10.1186/1471-2148-11-274Lang, A. (1884) Die Polycladen (Seeplanarien) des Golfes von Neapel und der angrenzenden Meeresabschnitte. Eine Monographie. Fauna und Flora des Golfes von Neapel und der angrenzenden Meeresabschnitte, herausgegeben von der Zoologische Station in Neapel. Engelmann, Leipzig, 688 pp.
Laidlaw, F.F. (1903) On the marine fauna of Zanzibar and British East Africa, from collections made by Cyril Crossland in the Years 1901 and 1902. Turbellaria Polycladida. I. The Acotylea. Proceedings of the Zoological Society of London, 2 (8), 99–113.
Laidlaw, F.F. (1906) On the marine fauna of the Cape Verde Islands, from collections made in 1904 by Mr C. Crossland. The polyclad Turbellaria. Proceedings of the Zoological Society of London, 2, 705–719.
Laumer, C.E., Hejnol, A. & Giribet, G. (2015) Nuclear genomic signals of the “microturbellarian” roots of platyhelminth evolutionary innovation. Elife, 4, e05503.
https://doi.org/10.7554/elife.05503Leopori, N.G. (1948) Descrizione di Dugesia sicula, nuava sp. di Triclade d'acqua dolce dei dintorni Catania. Archivo Zoologico Italiano, 33, 461–472.
Mack-Fira, V. (1974) The turbellarian fauna of the Romanian littoral waters of the Black Sea and its annexes. In: Riser, N.W. & Morse, M.P. (Eds.), Biology of Turbellaria. McGraw-Hill, New York, pp. 248–290.
Marcus, Er. (1949) Turbellaria Brasileiros (7). Boletin de Faculdade de Filosofia Ciencias e Letras, Universidade de Sao Paulo, Seccao Zoologia, 14, 7–155.
Marquina, D., Rodríguez, O.J., Fernández-Despiau, E. & Noreña, C. (2014a) State of knowledge of the Acotylea (Polycladida, Platyhelminthes) from the Mediterranean coasts of Spain: new records and new species. Zootaxa, 3780 (1), 108–134.
https://doi.org/10.11646/zootaxa.3780.1.4Marquina, D., Fernández-Álvarez, F.A. & Noreña, C. (2014b) Five new records and one new species of Polycladida (Platyhelminthes) for the Cantabrian coast (North Atlantic) of the Iberian Peninsula. Journal of the Marine Biological Association of the United Kingdom, 95, 311–322.
https://doi.org/10.1017/S0025315414001106Martín-Durán, J.M. & Egger, B. (2012) Developmental diversity in free-living flatworms. Evo Devo, 3 (1), 1.
https://doi.org/10.1186/2041-9139-3-7Meixner, J. (1928) Der Genitalapparat der Tricladen und seine Beziehungen zu ihrer allgemeinen Morphologie, Phylogenie, Ökologie und Verbreitung. Zeitschrift für Morphologie und Ökologie der Tiere, 11 (5), 570–612.
https://doi.org/10.1007/BF02424587Miyazawa, K., Jeon, J. K., Noguchi, T., Ito, K. & Hashimoto, K. (1987) Distribution of tetrodotoxin in the tissues of the flatworm Planocera multitentaculata (Platyhelminthes). Toxicon, 25, 975–980.
https://doi.org/10.1016/0041-0101(87)90160-7Moatemri Kafsi, R. & Zghal, F. (1988) Sur les Turbellaries de la lagune de Ghar El Melh: Etude morphologique. Bulletin de l'Institut National Scientifique et Technique d'Océanographie et de Pêche, 15, 85–96.
Modlinger, G. (1926) Adatok a Magas-Tatra es Planaria-Faunfijahoz, (Planarian fauna of the high Tatras and their environs). Matem Ter Meszett Ertesito, 43, 585–596.
Maghsoudlou, A. & Rahimian, H. (2014) Contribution to the knowledge of cotylean flatworms (Turbellaria, Polycladida) from Iranian coasts: Introducing a new species, with remarks on new records. Zootaxa, 3680 (4), 325–342.
https://doi.org/10.11646/zootaxa.3860.4.2Müller, O.F. (1776) Zoologiae danicae prodromus, seu Animalium Daniae et Norvegiae indigenarum characteres, nomina, et synonyma imprimis popularium. typis Hallageriis, Havniae, 282 pp.
https://doi.org/10.5962/bhl.title.13268Murina, G.V. (1981) Notes on the biology of some psammophile Turbellaria of the Black Sea. Hydrobiologia, 84, 129–130.
https://doi.org/10.1007/BF00026170Muttkowski, R.A. (1918) The Fauna of Lake Mendota: A Qualitative and Quantitative Survey with Special Reference to the Insects. Transactions of the Wisconsin Academy of Sciences Arts and Letters, 19, 374–482.
Novell, C. (2001) Contribució al Coneixement dels Turbellaris Policlàdides del Litoral Català. Tesi doctoral, Universitat de Barcelona, Barcelona, 262 pp.
Noreña, C., Marquina, D., Pérez, J. & Almon, B. (2014) First records of Cotylea (Polycladida, Platyhelminthes) for the Atlantic coast of the Iberian Peninsula. ZooKeys, 404, 1–22.
https://doi.org/10.3897/zookeys.404.7122Noreña, C., Rodríguez, J., Pérez, J. & Almon, B. (2015) New Acotylea (Polycladida, Platyhelminthes) from the east coast of the North Atlantic Ocean with special mention of the Iberian littoral. Zootaxa, 4039 (1), 157–172.
https://doi.org/10.11646/zootaxa.4039.1.7Oye, E. van (1941) Verbreitung und Oekologie der paludicolen Tricladen in Belgien. Archiv fur Hydrobiologie, 38 (1), 110–147.
Palombi, A. (1939) Turbellaria Policladea. Mémoires du Musée royal d'histoire naturelle de Belgique, 15, 95–114.
Palombi, A. (1928) Report on the Turbellaria. Zoological results of the Cambridge Expedition to the Suez Canal. 1924. Transactions of the Zoological Society, 22 (5), 579–630.
https://doi.org/10.1111/j.1096-3642.1928.tb00208.xPearse, A.S. (1938) Polyclads of the East Coast of North America. Proceedings of the United States National Museum, 86, 67–97.
https://doi.org/10.5479/si.00963801.86-3044.67Pearse, A.S. & Wharton, G.W. (1938) The oyster leech Stylochus inimicus Palombi associated with oysters on the coast of Florida. Ecological Monographs, 8, 605–655.
https://doi.org/10.2307/1943085Philippe, H., Brinkmann, H., Copley, R.R., Moroz, L.L., Nakano, H., Poustka, A.J., Wallberg, A., Peterson, K.J. & Telford, M.J. (2011) Acoelomorph flatworms are deuterostomes related to Xenoturbella. Nature, 470, 255–258.
https://doi.org/10.1038/nature09676Prudhoe, S. (1985) A monograph on polyclad Turbellaria. Oxford University Press, New York, 259 pp.
Quiroga, S.Y., Bolanos, D.M. & Litvaitis, M.K. (2004) A checklist of polyclad flatworms (Platyhelminthes: Polycladida) from the Caribbean coast of Colombia, South America. Zootaxa, 633 (1), 1–12.
https://doi.org/10.11646/zootaxa.633.1.1Quiroga, S.Y., Bolanos, D.M. & Litvaitis, M.K. (2008) Systematics and Taxonomy of Polyclad Flatworms with a special emphasis on the morphology of the nervous system. Phd thesis, University of New Hampshire, New Hampshire, 96 pp.
Salvenmoser, W., Egger, B., Achatz, J.G., Ladurner, P. & Hess, M.W. (2010) Electron microscopy of flatworms: standard and cryo-preparation methods. Methods in Cell Biology, 96, 307–330.
https://doi.org/10.1016/S0091-679X(10)96014-7Schupp, P., Eder, C., Proksch, R., Wray, V., Schneider, B., Herderich, M. & Paul, V. (1999) Stuarosporine derivatives from the ascidian Eudistoma toealenis and its predatory flatworm Pseudoceros sp. Journal of Natural Products, 62, 959–962.
https://doi.org/10.1021/np980527dSchupp, P.J., Kohlert-Schupp, C., Yoshida, W. & Hemscheidt, T.K. (2009) Structure of pseudocerosine, an indolic azafulvene alkaloid from the flatworm Pseudoceros indicus. Organic Letters, 11 (5), 1111–1114.
https://doi.org/10.1021/ol8027785Schmidt, O. (1861) Untersuchungen über Turbellarien von Corfu und Cephalonia, nebst Nachträgen zu früheren Arbeiten. Zeitschrift für wissenschaftliche Zoologie, 11, 1–32.
Sluys, R. (1989) A monograph of the marine triclads. Balkema A A, Rotterdam & Brookfield, 463 pp.
Steinböck, O. (1931) Marine Turbellaria. In: Jensen, S., Lundbeck, W. & Mortensen, Th. (Eds.), Zoology of the Faroes. Zoology of the Faroes, Copenhagen, pp. 8–26.
Steinböck, O. (1933) Die Turbellarienfauna der Umgebung von Rovingno. Thalassia, 1, 1–33.
Steinböck, O. (1937) The fishery grounds near Alexandria. 14. Turbellaria. Ministry of Commerce and Industry, Egypt; Hydrobiology and Fisheries Directorate. Notes and Memoirs, 25, 1–15.
Stocchino, G.A., Manconi, R., Corso, G., Sluys, R., Casu, S. & Pala, M. (2009) African planarians: Morphology and karyology of Dugesia maghrebiana sp. n. (Platyhelminthes, Tricladida) from Tunisia. Italian Journal of Zoology, 76 (1), 83–91.
https://doi.org/10.1080/11250000802141683Tekaya, S. & Zghal, F. (2001a) Ovogenèse et vitellogenèse chez la planaire marine gonochorique Sabussowia dioïca (Claparède, 1863): étude ultrastructurale et cytochimique. Bulletin de la Société Zoologique de France, 126 (12), 205–213.
Tekaya, S. & Zghal, F. (2001b) Spermiogenesis and ultrastructure of the spermatozoon in the dioecious marine planarian Sabussowia dioïca (Platyhelminthes, Tricladida). Belgian Journal of Zoology, 131, 183–185.
Tekaya, S. & Zghal, F. (1996) Présence d’hormones hypothalamiqes et gastrointestinales apparentées à celles des Vertébrés, chez la planaire marine Procerodes lobata (Platheminthe, Triclade). Bulletin de la Société des Sciences Naturelles de Tunisie, 25, 121–133.
Tekaya, S., Dhainaut-Courtois, N. & Zghal, F. (1996) Intervention d'un matériel immunologiquement apparenté à la tubuline lors de la régénération de la planaire marine Sabussowia dioïca (Claparède, 1863) (Plathelminthes, Tricladida). Bulletin de la société zoologique de France, 1213, 269–278.
Tekaya, S., Sluys, R. & Zghal, F. (1997) Sperm transfer and fertilization in the marine planarian Sabussowia dioica (Platyhelminthes, Tricladida, Maricola). Invertebrates Reproduction and Development, 32 (2), 143–147.
https://doi.org/10.1080/07924259.1997.9672615Tekaya, S., Gremigni, V. & Zghal, F. (1998) Ultrastructural and cytochemical study of the vitellaria in the marine triclad Sabussowia dioica (Platyhelminthes, Tricladida, Maricola). Journal of Submicroscopic Cytology and Pathology, 30 (2), 249–256.
Tekaya, S., Falleni, A., Dhainaut, A., Zghal, F. & Gremigni, V. (1999a) The ovary of the gonochoristic marine triclad Sabussowia dioica: ultrastructural and cytochemical investigations. Micron, 30, 71–83.
https://doi.org/10.1016/S0968-4328(98)00035-3Tekaya, S., Sluys, R. & Zghal, F. (1999b) Cocoon production, deposition, hatching, and embryonic development in the marine planarian Sabussowia dioica (Platyhelminthes, Tricladida, Maricola). Invertebrates Reproduction and Development, 35 (3), 215–223.
https://doi.org/10.1080/07924259.1999.9652387Van Beneden, E. (1860) Recherches sur la Faune Littorale de Belgique. Turbellaries. Mémoires de l’Académie Royale des Sciences, Lettres et Beaux Arts de Belgique, 32, 3–63.
https://doi.org/10.5962/bhl.title.47132Vàtova, A. (1928) Compendis della flora e fauna del Mare Adriatico presso Rovigno con la distribuzione geografica delle species bentoniche. Memorie del Regio Comitato Talassografico Italiano, 143, 154–174.
Vila, M., Sancho, M., Cardona, A., Fernandez, J. & Romero, R. (2004) New sexual population of Girardia tigrina (Girard, 1850) KENK, 1974 (Platyhelminthes, Turbellaria, Tricladida, Dugesidae), in southern France. Boletin de la Real Sociedad Espanola de Historia Natural Seccion Biologica, 99, 49–53.
Vila-Farre, M., Sluys, R., D'Aniello, S., Cebria, F., Ferrer, X. & Romero, R. (2009) Marine planarians (Platyhelminthes: Tricladida: Maricola) from the western Mediterranean Sea and the Cantabrian coast: new records, one new genus, and immunocytochemistry of the nervous system. Journal of the Marine Biological Association of the United Kingdom, 90 (2), 409–422.
https://doi.org/10.1017/S0025315409990476Voigt, W. (1892) Karten über die Verbreitung von Planaria alpina und P. gonocephala im Siebengebirge und am Feldberg und Altkönig im Taunus. Sitzungsber. Niederrhein. Ges. zu Bonn, 104 pp.
Wenzel, C., Ehlers, U. & Lanfranchi, A. (1992) The larval protonephridium of Stylochus mediterraneus Galleni (Polycladida, Plathelminthes): an ultrastructural analysis. Microfauna Marina, 7, 323–340.
Wilhelmi, J. (1909) Tricladen. Fauna und Flora des Golfes von Neapel und der angrenzenden Meeresabschnitte. Monographie 33, R. Friedlander und Sohne, Berlin, 668 pp.
Young, J.O. (1972) The Turbellaria of some Friesland lakes with incidental records of Gasteropoda [sic] and Hirudinea. Zoologische Bijdragen, 13, 59–70.
Zenetos, A., Çinar M.E., Pancucci-Papadopoulou, M.A., Harmelin, J.G., Furnari, G., Andaloro, F., Bellou, N., Streftaris, N. & Zibrowius, H. (2005) Annotated list of marine alien species in the Mediterranean with records of the worst invasive species. Mediterranean Marine Science, 6 (2), 63–118.
https://doi.org/10.12681/mms.186Zghal, F. & Tekaya, S. (1980) Sur les Turbellariés du golfe de Tunis; I. Etude morphologique. Archives de Institut Pasteur de Tunis, 57, 371–384.
Zghal, F. & Tekaya, S. (1982) Sur les Turbellariés du golfe de Tunis ; II. Recherches sur le pouvoir de régénération chez la planaire marine, Sabussowia dioïca (Claparède, 1863). Archives de Institut Pasteur de Tunis, 59, 587–604.
Zghal, F. & Tekaya, S. (1989) Turbellariés marins de Tunisie : Présence de Cerbussowia cerruti Wilhelmi, 1909, dans le Golfe de Tunis. Revue de la Faculté des Sciences de Tunis, 4, 81–88.