Abstract
We report on the schizorhynch species collected in a survey in the eastern region of Cuba. Eighteen species were identified, of which only three are known to science: Cheliplana asica, C. terminalis, and Carcharodorhynchus flavidus. The 15 new species belong to three different genera: Cheliplana (five species), Carcharodorhynchus (four species), and Schizochilus (six species). The five new species of Cheliplana (C. gibarenha sp. n., C. santiaguera sp. n., C. spuriaseminalis sp. n., C. subproximalis sp. n. and C. verrucosa sp. n.) differ from their congeners in the detailed morphology of the proboscis hooks and the atrial organs. The proboscis hooks bear a distal small hook in C. verrucosa sp. n., a feature only shared with C. paradoxa. Two of the four new species of Carcharodorhynchus (C. smilodon sp. n. and C. papillaris sp. n. ) are very similar to C. flavidus in that the toothed belts of the proboscis are not continuous. However, they clearly differ from that species and from each other in the detailed construction of the teeth and copulatory organ. Carcharodorhynchus spiniformis sp. n. and C. nativus sp. n. can also be distinguished from the other species of Carcharodorhynchus by the detailed construction of the proboscis teeth and copulatory organ. The six new species of Schizochilus here described show a spiny cirrus around a central stylet. Two species lack the distal sclerotized cap of the copulatory bulb: S. favus sp. n. and S. bueycabonensis sp. n.. All new species of Schizochilus can be distinguished from each other and their congeners by the detailed construction of the hard parts (cirrus and stylet) of the copulatory organ.
References
Armonies, W. (2017) Long-term change of meiofaunal species composition in a sandy beach, with description of 7 new species of Platyhelminthes. Helgoland Marine Research, 71 (12), 1–33.
https://doi.org/10.1186/s10152-017-0492-0
Armonies, W. (2018) Uncharted biodiversity in the marine benthos: the void of the smallish with description of ten new Platyhelminth taxa from the well-studied North Sea. Helgoland Marine Research, 72 (18), 1–29.
https://doi.org/10.1186/s10152-018-0520-8
Ax, P. (1951) Die Turbellarien des Eulitorals der Kieler Bucht. Zoologische Jahrbücher Abteilung für Systematik, Ökologie und Geographie der Tiere, 80, 277–378.
Ax, P. (1959) Zur Systematik Oekologie und Tiergeographie der Turbellarienfauna in den pontokaspischen Brackwassermeeren. Zoologische Jahrbücher, Abteilung für Systematik, Geographie und Biologie der Tiere, 87, 43–184.
Ax, P. (2008) Plathelminthes aus Brackgewässern der Nordhalbkugel. Akademie der Wissenschaften und der Literatur, Mainz – Franz Steiner Verlag, Stuttgart, 696 pp.
Boaden, P.J.S. (1963) The interstitial Turbellaria Kalyptorhynchia from some North Wales beaches. Proceedings of the Zoological Society of London, 141 (1), 173–205.
https://doi.org/10.1111/j.1469-7998.1963.tb01608.x
Boaden, P.J.S. (1965) A new interstitial turbellarian Cheliplana hypergyna n. sp. Pubblicazioni della Stazione Zoologica di Napoli, 34, 216–218.
Brunet, M. (1966) Sur quelques Turbellariés calyptorhynques de sables fins de la région de Marseille. Bulletin de la Société Zoologique de France, 91 (4), 721–730.
Brunet, M. (1967) Turbellariés schizorhynques de la région de Marseille. Sur Carcharodorhynchus subterraneus Meixner et Carcharodorhynchus flavidus nov. sp. Bulletin de la Société Zoologique de France, 92, 143–152.
Brunet, M. (1968) Turbellariés Karkinorhynchidae de la région de Marseille. Les genres Cheliplana et Cheliplanilla. Cahiers de Biologie Marine, 9, 421–440.
Brunet, M. (1970) Turbellariés Schizorhynchidae de sables infralittoraux de la côte marseillaise. Cahiers de Biologie Marine, 11, 279–306.
Brunet, M. (1979) Turbellariés calyptorhynques du golfe de Marseille. Revue de Biologie et écologie méditerranéenne, 6 (2), 101–120.
Claus, C. (1887) Lehrbuch der Zoologie. 4. Auflage. N. G. Elwertsche Verlagsbuchhandlung, Marburg, Leipzig, 1279, pp.
De Beauchamp, P. (1927) Rhabdocoeles des sables à diatomées d’Archachon. I. Coup d’oeil sur l’association Schizorhynchidae. Bulletin de la Société zoologique de France, 52, 351–359.
Dean, H.K. (1980) Parathylacorhynchus reidi gen. et sp. n., a Schizorhynchid (Turbellaria, Kalyptorhynchia) from the Coast of Maine, USA. Zoologica Scripta, 9, 5–9.
https://doi.org/10.1111/j.1463-6409.1980.tb00646.x
Diez, Y.L., Reygel, P. & Artois, T. (2018a) Parapharyngiella caribbaea n. sp., a new species of Trigonostomidae (Rhabdocoela; Platyhelminthes) from Cuba, with a taxonomical reassessment of the genus. Tropical Zoology, 31 (1), 34–43.
https://doi.org/10.1080/03946975.2017.1395258
Diez, Y.L., Sanjuan, C., Reygel, P., Roosen, P. & Artois, T. (2018b) First record of Polycystididae (Platyhelminthes, Kalyptorhynchia) from Cuba, with the description of a new genus and five new species, and remarks and the description of one new species from Panama. Zootaxa, 4514 (1), 201–125.
https://doi.org/10.11646/zootaxa.4514.1.9
Doe, D.A. (1974) Two New Proschizorhynchus Species from the Coast of Massachusetts, USA (Turbellaria, Kalyptorhynchia). Zoologica Scripta, 3, 101–110.
https://doi.org/10.1111/j.1463-6409.1974.tb00808.x
Ehlers, U. (1985) Cytoskelette bei freilebenden Plathelminthen. Verhandlungen der Deutschen Zoologischen Gesellschaft, 78, 161.
Ehrenberg, C.G. (1831) Animalia evertebrata exclusis insectis recensuit C.G. Ehrenberg. Series prima cum Tabularum decade prima. In: Hemprich, F.G. & Ehrenberg, C.G. (Eds.), Symbolae Physicae 2. Phytozoa Turbellaria. Officina Academica, Berolina, pp. 1–15.
Evdonin, L.A. (1977) Fauna USSR Turbellaria: Proboscis Turbellaria Kalyptorhynchus of the USSR fauna and adjacent areas. Fauna of the USSR, 115, 1–400.
Gobert, S., Reygel, P. & Artois, T. (2017) Schizorhynchia (Platyhelminthes Rhabdocoela) of Lanzarote (Canary Islands), with the description of eight new species. Marine Biodiversity, 1–19. [published online]
https://doi.org/10.1007/s12526-017-0736-x
Graff, L.v. (1905) Marine Turbellarien Orotavas und der Küsten Europas. Zeitschrift für wissenschaftliche Zoologie, 83, 68–148.
Hellwig, M. (1987) Ökologie freilebender Plathelminthen im Grenzraum Watt - Salzwiese lenitischer Gezeitenküsten. Microfauna Marina, 3, 157–248.
Hoxhold, S. (1974) Zur Populationsstruktur und Abundanzdynamik interstitieller Kalyptorhynchia (Turbellaria, Neorhabdocoela). Mikrofauna des Meeresbodens, 41, 3–134.
Jouk, P.E.H. & De Vocht, A.J.-P. (1989) Kalyptorhynchia (Plathelminthes Rahbdocoela) from the Kenyan Coast, with description of four new species. Tropical Zoology, 2, 145–157.
https://doi.org/10.1080/03946975.1989.10539435
Karling, T.G. (1949) Studien über Kalyptorhynchien (Turbellaria). 2. Die Familien Karkinorhynchidae und Diascorhynchidae. Acta Zoologica Fennica, 58, 1–42.
Karling, T.G. (1956) Morphologisch-histologische Untersuchungen an den männlichen Atrialorganen der Kalyptorhynchia (Turbellaria). Arkiv för Zoologi, 9 (7), 187–279.
Karling, T.G. (1983) Structural and systematic studies on Turbellaria Schizorhynchia (Platyhelminthes). Zoologica Scripta, 12 (2), 77–89.
https://doi.org/10.1111/j.1463-6409.1983.tb00552.x
Karling, T.G. (1989) New taxa of Kalyptorhynchia (Platyhelminthes) from the N. American Pacific coast. Zoologica Scripta, 18 (1), 19–32.
https://doi.org/10.1111/j.1463-6409.1989.tb00120.x
L’Hardy, J.-P. (1963) Turbellariés Schizorhynchidae des sables de Roscoff - 1. Les genres Carcharodorhynchus, Schizochilus et Schizorhynchoides. Cahiers de Biologie Marine, 4, 459–472.
Marcus, E. (1949) Turbellaria Brasileiros (7). Boletins da Faculdade de Filosofia Ciências e Letras, Universidade de Sao Paulo, 14, 7–155.
https://doi.org/10.11606/issn.2526-4877.bsffclzoologia.1949.129106
Marcus, E. (1950) Turbellaria Brasileiros (8). Boletins da Faculdade de Filosofia Ciências e Letras, Universidade de Sao Paulo, 15, 1–190.
https://doi.org/10.11606/issn.2526-4877.bsffclzoologia.1950.125192
Marcus, E. (1952) Turbellaria Brasileiros (10). Boletins da Faculdade de Filosofia, Ciências e Letras, Universidade de Sao Paulo, 17, 5–187.
https://doi.org/10.11606/issn.2526-4877.bsffclzoologia.1952.125189
Meixner, J. (1928) Aberrante Kalyptorhynchia (Turbellaria : Rhabdocoela) aus dem Sande der Kieler Bucht. Zoologischer Anzeiger, 77, 229–253.
Meixner, J. (1938) 4. Turbellaria (Strudelwürmer). Die Tierwelt der Nord- und Ostsee, 33, 1–146.
Noldt, U. & Hoxhold, S. (1984) Interstitielle fauna von Galapagos—34. Schizorhynchia (Plathelminthes, Kalyptorhynchia). Microfauna Marina, 5, 7–85.
Noldt, U. (1987) Carolinorhynchus follybeachensis gen. et sp. n. (Schizorhynchia, Plathelminthes) from the coast of South Carolina, USA. Microfauna Marina, 3, 283–296.
Noldt, U. (1989) Kalyptorhynchia (Platyhelminthes) from Sublittoral Coastal Areas near the Island of Sylt (North Sea). I. Schizorhynchia. Microfauna Marina, 1, 199–256.
Reygel, P., Schockaert, E., Jannsen, T. & Artois, T. (2014) Two new species of Carcharodorhynchus Meixner, 1938 (Plattyhelminthes: Rhabdocoela: Schizorhynchidae) from Brazil and Lanzarote. Marine Biodiversity, 44, 279–285.
https://doi.org/10.1007/s12526-014-0205-8
Scherer, B. (1985) Annual dynamics of a meiofaunal community from the “sulfide layer” of a North Sea sand flat. Microfauna Marina, 2, 117–131.
Schilke, K. (1970a) Kalyptorhynchia (Turbellaria) aus dem Eulitoral der deutschen Nordseeküste. Helgoländer wissenschaftliche Meeresuntersuchungen, 21, 143–265.
https://doi.org/10.1007/BF01630522
Schilke, K. (1970b) Zur Morphologie und Phylogenie der Schizorhynchia (Turbellaria, Kalyptorhynchia). Zeitschrift für Morphologie der Tiere, 67, 118–171.
https://doi.org/10.1007/BF00283198
Schockaert, E.R. (1982) Turbellaria from Somalia 2. Kalyptorhynchia (part 2). Monitore Zoologico Italiano, 18 (2), 81–96.
https://doi.org/10.1080/03749444.1982.10736660
Schockaert, E.R. (1996) Turbellarians. In: Hall, G.S. (Ed.), Methods for the Examination of Organismal Diversity in Soils and Sediments. CAB International, Wallingford, pp. 211–225.
Schockaert, E.R., Jouk, P.E.H. & Martens, P.M. (1989) Free-living plathelminthes from the Belgian coast and adjacent areas. Verhandelingen van het symposium “Invertebraten van Belgie”, 1989, 19–25.
Tessens, B., Janssen, T. & Artois, T. (2014) Molecular phylogeny of Kalyptorhynchia (Rhabdocoela, Platyhelminthes) inferred from ribosomal sequence data. Zoologica Scripta, 43, 519–530.
https://doi.org/10.1111/zsc.12066
Tyler, S., Artois, T., Schilling, S., Hooge, M. & Bush, L.F. (Eds.) (2006–2018a) World List of turbellarian worms: Acoelomorpha, Catenulida, Rhabditophora. Schizorhynchia Boaden, 1963. World Register of Marine Species. Available from: http://www.marinespecies.org/aphia.php?p=taxdetails&id=142395/ (accessed 28 November 2018)
Tyler, S., Artois, T., Schilling, S., Hooge, M. & Bush, L.F. (Eds.) (2006–2018b) World List of turbellarian worms: Acoelomorpha, Catenulida, Rhabditophora. Schizochilus Boaden, 1963. World Register of Marine Species. Available from: http://www.marinespecies.org/aphia.php?p=taxdetails&id=142395/ (accessed 28 November 2018)
Vandepitte, L., Decock, W. & Mees, J. (Eds.) (2010) Belgian Register of Marine Species, compiled and validated by the VLIZ Belgian Marine Species Consortium. Vlaams Instituut voor de Zee, Oostende, 78pp.
Van Steenkiste, N., Volonterio, O., Schockaert, E. & Artois, T. (2008) Marine Rhabdocoela (Platyhelminthes, Rhabditophora) from Uruguay, with the description of eight new species and two new genera. Zootaxa, 1914, 1–33.
Wehrenberg, C. & Reise, K. (1985) Artenspektrum und Abundanz freilebender Plathelminthes in sublitoralen Sanden der Nordsee bei Sylt. Microfauna Marina, 2, 163–179.
Whitson, A., Smith III, J.P.S. & Litvaitis, M.K. (2011) Lehardyia alleithoros, sp. n. (Turbellaria, Kalyptorhynchia) from the Coast of North Carolina, USA. Southeastern Naturalist, 10 (2), 221–232.
https://doi.org/10.1656/058.010.0203