<i>Tritonia iocasica</i> sp. nov., a new tritoniid species from a seamount in the tropical Western Pacific (Heterobranchia: Nudibranchia) -- Journal of Oceanology and Limnology,2021,39(5):1817-1829

	Cite this paper:
	Shuqian ZHANG, Suping ZHANG. Tritonia iocasica sp. nov., a new tritoniid species from a seamount in the tropical Western Pacific (Heterobranchia: Nudibranchia)[J]. Journal of Oceanology and Limnology, 2021, 39(5): 1817-1829

Tritonia iocasica sp. nov., a new tritoniid species from a seamount in the tropical Western Pacific (Heterobranchia: Nudibranchia)

Shuqian ZHANG^1,2, Suping ZHANG^1,2

1 Laboratory of Marine Organism Taxonomy and Phylogeny, Institute of Oceanology, Chinese Academy of Sciences, Qingdao 266071, China;
2 Center for Ocean Mega-Science, Chinese Academy of Sciences, Qingdao 266071, China

Abstract:

During an expedition to a seamount at Caroline Plate in the tropical Western Pacific, a new species of Tritonia was sampled from the upper bathyal zone at depth of 970-1 262 m. This new species, Tritonia iocasica sp. nov., represents the first tritoniid nudibranch known to feed on octocoral of the family Melithaeidae. The species is up to 120 mm in length, pinkish in color; with the rhinophoral sheath divided into several petaliform extensions; veil with about 18 elongate digitiform processes; notal margin with 17-19 pairs of secondary gills; anus located below the 5^th and 6^th secondary gills, and the genitalia below the 3^rd secondary gill on the right side of the body. Based on these external features, T. iocasica sp. nov. can be clearly distinguished from all previously described members of the genus. Phylogenetic analyses of two mitochondrial (COI, 16S rRNA) and a nuclear (H3) genes using Bayesian inference, maximum likelihood, and species delimitation analysis also support the separation of T. iocasica sp. nov. from its congeners.

Key words: Tritoniidae|Mariana Trench|upper bathyal zone|Melithaeidae

Received: 2020-10-23 Revised: 2020-12-18

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Articles by Suping ZHANG

References:
Akaike H. 1998. Information theory and an extension of the maximum likelihood principle. In:Parzen E, Tanabe K, Kitagawa G eds. Selected Papers of Hirotugu Akaike. Springer, New York. p.199-213, https://doi.org/10.1007/978-1-4612-1694-0_15.
Almón B, Pérez J, Caballer M. 2018. Expect the unexpected:a new large species of Marionia (Heterobranchia:nudibranchia:tritoniidae) from western Europe. Invertebrate Systematics, 32(4):890-906, https://doi.org/10.1071/IS17073.
Baba K. 1937. A new species of the nudibranchiate genus Marionia from Sagami Bay, Japan. The Venus, 7(3):116-120.
Baba K. 1969. Notes on the collection of Tritonia festiva(Stearns, 1873) from the Seas of Japan(Gastropoda:Nudibranchia). The Veliger, 12:132-134.
Ballesteros M, Avila C. 2006. A new tritoniid species(Mollusca:opisthobranchia) from Bouvet Island. Polar Biology, 29(2):128-136, https://doi.org/10.1007/s00300-005-0059-4.
Bergh R. 1899. Nudibranchiate Gasteropoda. Dan Ingolf Exped, 2:1-49.
Bertsch H, Valdés Á, Gosliner T M. 2009. A new species of tritoniid nudibranch, the first found feeding on a zoanthid anthozoan, with a preliminary phylogeny of the Tritoniidae. Proceedings of the California Academy of Sciences, 60(12):431-446.
Bertsch H. 2014. Biodiversity in La Reserva de la Biósfera Bahía de los Ángeles y Canales de Ballenas y Salsipuedes:naming of a new genus, range extensions and new records, and species list of Heterobranchia (Mollusca:gastropoda), with comments on biodiversity conservation within Marine Reserves. The Festivus, 46(5):158-177.
Bouchet P. 1977. Opisthobranches de profondeur de l'Océan Atlantique:II-Notaspidea et Nudibranchiata. Journal of Molluscan Studies, 43(1):28-66.
Chimienti G, Angeletti L, Furfaro G, Canese S, Taviani M. 2020. Habitat, morphology and trophism of Tritonia callogorgiae sp. nov., a large nudibranch inhabiting Callogorgia verticillata forests in the Mediterranean Sea. Deep Sea Research Part I:Oceanographic Research Papers, 165:103364, https://doi.org/10.1016/j.dsr.2020.103364.
Colgan D J, McLauchlan A, Wilson G D F, Livingston S P, Edgecombe G D, Macaranas J, Cassis G, Gray M R. 1998. Histone H3 and U2 snRNA DNA sequences and arthropod molecular evolution. Australian Journal of Zoology, 46(5):419-437, https://doi.org/10.1071/ZO98048.
Ekimova I, Valdés Á, Chichvarkhin A, Antokhina T, Lindsay T, Schepetov D. 2019. Diet-driven ecological radiation and allopatric speciation result in high species diversity in a temperate-cold water marine genus Dendronotus(Gastropoda:nudibranchia). Molecular Phylogenetics and Evolution, 141:106609, https://doi.org/10.1016/j.ympev.2019.106609.
Folmer O, Black M, Hoeh W, Lutz R, Vrijenhoek R. 1994. DNA primers for amplification of mitochondrial cytochrome c oxidase subunit I from diverse metazoan invertebrates. Molecular Marine Biology and Biotechnology, 3(5):294-299.
García-Matucheski S, Muniain C. 2011. Predation by the nudibranch Tritonia odhneri (Opisthobranchia:tritoniidae) on octocorals from the South Atlantic Ocean. Marine Biodiversity, 41(2):287-297, https://doi.org/10.1007/s12526-010-0063-y.
Göbbeler K, Klussmann-Kolb A. 2010. Out of Antarctica?-new insights into the phylogeny and biogeography of the Pleurobranchomorpha (Mollusca, Gastropoda). Molecular Phylogenetics and Evolution, 55(3):996-1 007, https://doi.org/10.1016/j.ympev.2009.11.027.
Goodheart J A, Bazinet A L, Valdés Á, Collins A G, Cummings M P. 2017. Prey preference follows phylogeny:evolutionary dietary patterns within the marine gastropod group Cladobranchia (Gastropoda:heterobranchia:nudibranchia). BMC Evolutionary Biology, 17(1):221, https://doi.org/10.1186/s12862-017-1066-0.
Gosliner T M, Behrens D W, Valdés Á. 2008. Indo-Pacific Nudibranchs and Sea Slugs:a Field Guide to the World's Most Diverse Fauna. California Academy of Sciences/Sea Challengers Natural History Books, San Francisco. 426p.
Gosliner T M, Ghiselin M T. 1987. A new species of Tritonia(Opisthobranchia:gastropoda) from the Caribbean Sea. Bulletin of Marine Science, 40(3):428-436.
Gosliner T M, Valdés Á, Behrens D W. 2018. Nudibranch & Sea Slug Identification:Indo-Pacific. 2^nd ed. New World Publications, Jacksonville. 451p.
Guindon S, Dufayard J F, Lefort V, Anisimova M, Hordijk W, Gascuel O. 2010. New algorithms and methods to estimate maximum-likelihood phylogenies:assessing the performance of PhyML 3.0. Systematic Biology, 59(3):307-321, https://doi.org/10.1093/sysbio/syq010.
Heimeier D, Lavery S, Sewell M A. 2010. Using DNA barcoding and phylogenetics to identify Antarctic invertebrate larvae:lessons from a large scale study. Marine Genomics, 3(3-4):165-177, https://doi.org/10.1016/j.margen.2010.09.004.
Hulett R E, Mahguib J, Gosliner T M, Valdés Á. 2015. Molecular evaluation of the phylogenetic position of the enigmatic species Trivettea papalotla (Bertsch)(Mollusca:nudibranchia). Invertebrate Systematics, 29(3):215-222, https://doi.org/10.1071/IS15002.
Katoh K, Standley D M. 2013. MAFFT multiple sequence alignment software version 7:improvements in performance and usability. Molecular Biology and Evolution, 30(4):772-780, https://doi.org/10.1093/molbev/mst010.
Korshunova T, Martynov A. 2020. Consolidated data on the phylogeny and evolution of the family Tritoniidae(Gastropoda:nudibranchia) contribute to genera reassessment and clarify the taxonomic status of the neuroscience models Tritonia and Tochuina. PLoS One, 15(11):e0242103, https://doi.org/10.1371/journal.pone.0242103.
Kumar S, Stecher G, Li M, Knyaz C, Tamura K. 2018. MEGA X:molecular evolutionary genetics analysis across computing platforms. Molecular Biology and Evolution, 35(6):1 547-1 549.
Lanfear R, Frandsen P B, Wright A M, Senfeld T, Calcott B. 2017. PartitionFinder 2:new methods for selecting partitioned models of evolution for molecular and morphological phylogenetic analyses. Molecular Biology and Evolution, 34(3):772-773, https://doi.org/10.1093/molbev/msw260.
Lemehe H. 1961. Tritonia Cuvier,[1797] (Gastropoda); proposed designation of a type-species under the plenary powers. The Bulletin of Zoological Nomenclature, 18:285-286.
Marcus E D B R. 1983. The western Atlantic Tritoniidae. Boletim de Zoologia, 6(6):177-214.
McDonald G R. 1983. A review of the nudibranchs of the California coast. Malacologia, 24(1-2):114-276.
Minh B Q, Nguyen M A T, Von Haeseler A. 2013. Ultrafast approximation for phylogenetic bootstrap. Molecular Biology and Evolution, 30(5):1 188-1 195, https://doi.org/10.1093/molbev/mst024.
MolluscaBase. 2021. MolluscaBase. Tritonia Cuvier, 1798. Accessed through:World Register of Marine Species. http://www.marinespecies.org/aphia.php?p=taxdetails&id=138580, accessed on 2021-06-08.
Nguyen L T, Schmidt H A, Von Haeseler A, Minh B Q. 2015. IQ-TREE:a fast and effective stochastic algorithm for estimating maximum-likelihood phylogenies. Molecular Biology and Evolution, 32(1):268-274, https://doi.org/10.1093/molbev/msu300.
Odhner N H. 1936. Nudibranchia dendronotacea:a revision of the system. In:Mélanges P P ed. Mémoires du Musée Royal d'Histoire Naturelle de Belgique. Musée Royal d'Histoire Naturelle de Belgique, Bruxelles. p.1 057-1 128.
Odhner N H. 1963. On the taxonomy of the family Tritoniidae(Mollusca:opisthobranchia). The Veliger, 6:48-52.
Ortea J, Moro L. 2020. El FS Poseidon rinde homenaje al Hirondelle:descripción de una nueva especie de Tritonia Cuvier, 1798 (Mollusca:nudibranchia) de las aguas profundas de las islas de Cabo Verde para celebrar las singladuras de un yate carismático. Avicennia, 27:29-34.
Palumbi S R. 1996. Nucleic acids II:the polymerase chain reaction. In:Hillis D M, Moritz C, Mable B K eds. Molecular Systematics. Sinauer Associates, Sunderland, Massachusetts. p.205-247.
Pola M, Gosliner T M. 2010. The first molecular phylogeny of cladobranchian opisthobranchs (Mollusca, Gastropoda, Nudibranchia). Molecular Phylogenetics and Evolution, 56(3):931-941, https://doi.org/10.1016/j.ympev.2010.05.003.
Puillandre N, Lambert A, Brouillet S, Achaz G. 2012. ABGD, automatic barcode gap discovery for primary species delimitation. Molecular Ecology, 21(8):1 864-1 877, https://doi.org/10.1111/j.1365-294x.2011.05239.x.
Roginskaya I S. 1984. A new deep-water species of Tritoniidae(Opisthobranchia, Nudibranchia, Dendronotacea) from the slope of Kurile Islands. Trudy Instituta Okeanologii Akademii Nauk SSSR, 119:99-105.
Ronquist F, Teslenko M, Van Der Mark P, Ayres D L, Darling A, Höhna S, Larget B, Liu L, Suchard M A, Huelsenbeck J P. 2012. MrBayes 3.2:efficient Bayesian phylogenetic inference and model choice across a large model space. Systematic Biology, 61(3):539-542, https://doi.org/10.1093/sysbio/sys029.
Schrödl M. 2003. Sea slugs of South America:Systematics, Biogeography and Biology of Chilean and Magellanic Nudipleura (Mollusca:Opisthobranchia). ConchBooks, Hackenheim. 165p.
Silva F D V, De Azevedo V M, Matthews-Cascon H. 2014. A new species of Tritonia (Opisthobranchia:nudibranchia:tritoniidae) from the tropical South Atlantic Ocean. Journal of the Marine Biological Association of the United Kingdom, 94(3):579-585, https://doi.org/10.1017/S0025315413001586.
Silva F D V, Herrero-Barrencua A, Pola M, Cervera J L. 2019. Description of a new species of Marionia (Gastropoda:heterobranchia:tritoniidae) from the Gulf of Guinea(eastern Atlantic Ocean). Bulletin of Marine Science, 95(3):431-447, https://doi.org/10.5343/bms.2018.0096.
Smith V G, Gosliner T M. 2003. A new species of Tritonia from Okinawa (Mollusca:nudibranchia), and its association with a gorgonian octocoral. Proceedings of the California Academy of Sciences, 54(16):255-278.
Smith V G, Gosliner T M. 2005. A new species of Marionia(Gastropoda:nudibranchia) from the Caroline Islands. Proceedings of the California Academy of Sciences, 56(6):66-75.
Talavera G, Castresana J. 2007. Improvement of phylogenies after removing divergent and ambiguously aligned blocks from protein sequence alignments. Systematic Biology, 56(4):564-577, https://doi.org/10.1080/10635150701472164.
Trainito E, Doneddu M. 2014. Nudibranchi del Mediterraneo. Il Castello, Milano. 192p.
Valdés Á, Lundsten L, Wilson N G. 2018. Five new deep-sea species of nudibranchs (Gastropoda:heterobranchia:cladobranchia) from the Northeast Pacific. Zootaxa, 4526(4):401-433, https://doi.org/10.11646/zootaxa.4526.4.1.
Valdés Á, Murillo F J, McCarthy J B, Yedinak N. 2017. New deep-water records and species of North Atlantic nudibranchs (Mollusca, Gastropoda:heterobranchia) with the description of a new species. Journal of the Marine Biological Association of the United Kingdom, 97(2):303-319, https://doi.org/10.1017/S0025315416000394.
Valdés A. 2006. Marionia tedi Ev. Marcus, 1983 (Nudibranchia, Tritoniidae) in the Gulf of Mexico:first record of an opisthobranch mollusk from hydrocarbon cold seeps. Gulf and Caribbean Research, 18(1):41-46, https://doi.org/10.18785/gcr.1801.05.
Wägele H. 1995. The morphology and taxonomy of the Antarctic species of Tritonia Cuvier, 1797 (Nudibranchia:dendronotoidea). Zoological Journal of the Linnean Society, 113(1):21-46, https://doi.org/10.1016/S0024-4082(05)80003-2.
Willan R C. 1988. The taxonomy of two host-specific, cryptic dendronotoid nudibranch species (Mollusca:gastropoda) from Australia including a new species description. Zoological Journal of the Linnean Society, 94(1):39-63, https://doi.org/10.1111/j.1096-3642.1988.tb00881.x.