Abstract
Two new species and one new record species of the genus Pseudonereis are described from specimens collected from ecological surveys of coasts of Taiwan and an offshore island during the past 15 years: P. jihueiensis n. sp., P. kihawensis n. sp., and P. trimaculata. Epitokes of P. jihueiensis n. sp. and P. trimaculata are also described. Pseudonereis jihueiensis n. sp. can be distinguished from congeners by having edentate jaws, χ-shaped ridge pattern of Areas VI–V–VI, parapodial morphology (i.e., length ratio of dorsal cirrus to dorsal ligule or presence of small pennant-like dorsal ligule, shape of dorsal ligule in certain region of chaetigers), and no heterogomph spinigers in the subacicular fascicle of the neuropodia. Pseudonereis kihawensis n. sp. differs from congeners by having crescent-shaped pointed-bars in Area VI, λ-shaped ridge pattern of Areas VI–V–VI, parapodial morphology (i.e., length ratio of dorsal cirrus to dorsal ligule or presence of small pennant-like dorsal ligule or shape of dorsal ligule in certain region of chaetigers), and no heterogomph spinigers in the subacicular fascicle of the neuropodia. Pseudonereis trimaculata, a species originally described from Indonesia, is reported from Taiwan for the first time. A table of key characters for all species of Pseudonereis is provided.
References
Bakken, T. (2007) Revision of Pseudonereis (Polychaeta, Nereididae). Zoological Journal of the Linnean Society, 150 (1), 145–176. https://doi.org/10.1111/j.1096-3642.2007.00289.x
Bakken, T. & Wilson, R.S. (2005) Phylogeny of nereidids (Polychaeta, Nereididae) with paragnaths. Zoologica Scripta, 34 (5), 507–547. https://doi.org/10.1111/j.1463-6409.2005.00200.x
Bakken, T., Glasby, C.J., Santos, C.S.G. & Wilson, R.S. (2021) Nereididae Blainville, 1818. In: Westheide, W., Purschke, G. & Böggemann, M. (Eds.), Handbook of Zoology. A Natural History of the Phyla of the Animal Kingdom, Annelida: Polychaetes. De Gruyter, Ösnabruck. [in press]
Blainville, H. (1818) Mémoire sur la classe des Sétipodes, partie des Vers à sang rouge de M. Cuvier, et des Annélides de M. de Lamarck. Bulletin des Sciences, par la Société Philomatique de Paris, 1818, 78–85.
Conde-Vela, V.M. (2018) New species of Pseudonereis Kinberg, 1865 (Polychaeta: Nereididae) from the Atlantic Ocean, and a review of paragnath morphology and methodology. Zootaxa, 4471 (2), 245–278. https://doi.org/10.11646/zootaxa.4471.2.2
Glasby, C.J., Wei, N.-W.V. & Gibb, K.S. (2013) Cryptic species of Nereididae (Annelida : Polychaeta) on Australian coral reefs. Invertebrate Systematics, 27 (3), 245–264. https://doi.org/10.1071/IS12031
Hartman, O. (1948) The polychaetous annelids of Alaska. Pacific Science, 2 (1), 3–58.
Horst, R. (1924) Polychaeta errantia of the Siboga Expedition. Part III. Nereidae and Hesionidae. Siboga-Expeditie Uitkomsten op Zoologisch, Bonatisch, Oceanographisch en Geologisch gebied verzameld in Nederlandsch Oost-Indië 1899-1900, 24 (1c), 145–198.
Imajima, M. (1972) Review of the annelid worms of the family Nereidae of Japan, with descriptions of five new species or subspecies. Bulletin of the National Science Museum, Tokyo, 15 (1), 37–153.
Kara, J., Macdonald, A.H.H. & Simon, C.A. (2018) Integrative taxonomic methods reveal an incorrect synonymisation of the South African Pseudonereis podocirra (Schmarda) as the widespread Pseudonereis variegata (Grube) from Chile. Invertebrate Systematics, 32 (6), 1282–1297. https://doi.org/10.1071/IS18016
Kinberg, J.G.H. (1865) Annulata nova. [Continuatio.]. Öfversigt af Königlich Vetenskapsakademiens förhandlingar, Stockholm, 22 (2), 167–179.
Sun, R. & Yang, D. (2004) Annelida. Polychaeta II. Nereidida (=Nereimorpha). Nereididae, Syllidae, Hesionidae, Pilargidae, Nephtyidae. In: Huo, C. & Zhao, G. (Eds.), Fauna Sinica, Invertebrata. Science Press, Beijing, pp. 1–520. [in Chinese with English abstract]
Villalobos-Guerrero, T.F. (2019) Redescription of two over-looked species of the Perinereis nuntia complex and morphological delimitation of P. nuntia (Savigny in Lamarck, 1818) from the Red Sea (Annelida, Nereididae). Zoosystema, 41 (24), 465–496. https://doi.org/10.5252/zoosystema2019v41a24
Villalobos-Guerrero, T.F. & Bakken, T. (2018) Revision of the Alitta virens species complex (Annelida: Nereididae) from the North Pacific Ocean. Zootaxa, 4483 (2), 201–257.
Villalobos-Guerrero, T.F. & Tovar-Hernández, M.A. (2013) Una especie nueva de Pseudonereis (Polychaeta: Nereididae) de Mazatlán, golfo de California, incluyendo una clave para las especies del mundo [A new species of Pseudonereis (Polychaeta: Nereididae) from Mazatlán, Gulf of California, including a key to all species of the world]. Revista Mexicana de Biodiversidad, 84 (3), 774–781. https://doi.org/10.7550/rmb.32657
Wu, S.-K. (1967) The nereid worms of Taiwan. Bulletin of the Institute of Zoology, Academia Sinica, 6, 47–76.