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Type: Article
Published: 2023-03-09
Page range: 51-68
Abstract views: 189
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Songkhramodopsis gen. nov., a new genus of Cypridopsinae (Crustacea: Ostracoda) from Thailand



Department of Biology, Faculty of Science, Mahasarakham University, Maha Sarakham 44150, Thailand.

Crustacea Biodiversity Cyprididae Crustacean Songkhram River Taxonomy


A new genus and species of subfamily Cypridopsinae Kaufmann, 1900, Songkhramodopsis meischi gen. et sp. nov., is described from the Lower Songkhram River Basin, Thailand. The prominent diagnostic characters of the new genus mainly exist in antennula (A1), antenna (A2) and third thoracopod (T3): the six-segmented A1, the strongly serrated claw G2 on the female A2, the large aesthetasc Y with remarkably large and striated third section and the completely separated terminal segment of T3. The A1 with six segments, together with the distinctive morphology of aesthetasc Y, have been recognized for the first time in the Cypridopsinae. A new tribe, Songkhramodopsini trib. nov., is also erected to accommodate this exceptional new genus and species. The new taxon is also characterized by the left valve overlapping the right valve, the anterior and posterior inner list on both valves, the widely inwardly displaced posterior selvage on right valve, the bifurcate-like tip of an apical ventral seta on A1 first segment, the absence of d1 seta on second thoracopod (T2), the divided penultimate segment of T2, the female caudal ramus with cylindrical base, the very small number of spiny whorls of Zenker organ. A key to tribes of Cypridopsinae is provided.



  1. Almeida, N.M., Higuti, J., Ferreira, V.G. & Martens, K. (2021) A new tribe, two new genera and three new species of Cypridopsinae (Crustacea, Ostracoda, Cyprididae) from Brazil. European Journal of Taxonomy, 762, 1–48.
    Anichini, G. (1967) Gli Ostracodi della Sardenia. Rendiconti del Seminario della Facoltà di Scienze della Università di Cagliari, 32, 1–42.
    Battish, S.K. (1982) Freshwater Ostracods of the family Cypridopsidae from Punjab, India, with the description of two new species. Journal of Natural History, 16, 83–93.
    Broodbakker, N.W. & Danielopol, D.L. (1982) The chaetotaxy of Cypridacea (Crustacea, Ostracoda) limbs: proposals for a descriptive model. Bijdragen tot de Dierkunde, 52 (2), 103–120.
    Dumont, H. & Martens, K. (1996) The freshwater microcrustacea of Easter Island. Hydrobiologia, 325, 83–99.
    Ferguson, E. (1964) The ostracod (Crustacea) genus Cypridopsis in North America and a description of Cypridopsis howei, sp. nov. Transactions of the American Microscopical Society, 83, 380–384.
    Furtos, N.C. (1933) The Ostracoda of Ohio. Bulletin of the Ohio Biological Survey, 5, 411–524.
    Furtos, N.C. (1936) On the Ostracoda from the Cenotes of Yucatan and vicinity. Publication Carnegie Institution of Washington, 457, 89–115.
    Furtos, N.C. (1938) A new species of Cypridopsis from Yucatan. Publication Carnegie Institution of Washington, 491, 155–157.
    Higuti, J. & Martens, K. (2012) On a new cypridopsine genus (Crustacea, Ostracoda, Cyprididae) from the Upper Paraná River Floodplain (Brazil). Zootaxa, 3391 (1), 23–38.
    Horne, D.J., Meisch, C. & Martens, K. (2019) Arthropoda: Ostracoda. In: Rogers, D.C. & Thorp, J.H. (Eds.), Keys to Palaearctic Fauna: Thorp and Covich’s Freshwater invertebrates. Vol. IV. Academic Press, Elsevier, London, pp. 725–760.
    Jacobs, B. & Martens, K. (2022) An endemic species flock of Cypridopsinae (Crustacea, Ostracoda) from the ancient Lake Malawi (Africa), with the description of a new genus and three new species. Zootaxa, 5100 (3), 301–348.
    Karanovic, I. (2011) On the recent Cyclocypridinae (Podocopida, Candonidae) with description of two new genera and one new species. Zootaxa, 2820 (1), 1–61.
    Karanovic, I. (2012) Recent Freshwater Ostracods of the World: Crustacea, Ostracoda, Podocopida. Springer-Verlag, Berlin Heidelberg, 608 pp.
    Karanovic, I. & Pesce, G.L. (2000) Martenscypridopsis a new ostracod genus (Crustacea: Ostracoda) from African inland waters. Annales de Limnologie, 36, 149–155.
    Kaufmann, A. (1900) Cypriden und Darwinuliden der Schweiz. Revue Suisse de Zoologie, 8, 209–423.
    Klie, W. (1940) Süßwasserostracoden aus Nordbrasilien. 6. Cyprinae mit geißelförmiger Furka. Zoologischer Anzeiger, 130, 59–73.
    Klie, W. (1943) Ostracoden aus Marokko und Mauretanien. Zoologischer Anzeiger, 143, 49–62.
    Klie, W. (1944) Exploration du Parc National Albert. Mission H. Damas (1935–1936). Ostracoda. Institut des Parcs nationals du Congo Belge, Bruxelles, 12, 1–62.
    Külköylüoðlu, O., Meisch, C. & Rust, R.W. (2003) Thermopsis thermophila n. gen. n. sp. from hot spring in Nevada, U.S.A. (Crustacea, Ostracoda). Hydrobiologia, 499, 113–123.
    Latreille, P.A. (1802) Histoire naturelle, geìneìrale et particulieÌre des crustaceìs et des insectes. Ouvrage faisant suite aÌ l’Histoire Naturelle geìneìrale et particulieÌre, composeìe par Leclerc de Buffon, et reìdigeìe par C. S. Sonnini, membre de plusieurs Socieìteìs savantes. Tome 3. F. Dufart, Paris, 467 pp.
    Margalef, R. (1961) La vida en los charcos de agua de Nueva Esparta (Venezuela). Memoria de la Sociedad de Ciencias Naturales la Salle, 21, 75–110.
    Martens, K. (1987) Homology and functional morphology of the sexual dimorphism in the antenna of Sclerocypris Sars, 1924 (Crustacea, Ostracoda, Megalocypridinae). Bijdragen tot de Dierkunde, 57 (2), 183–190.
    Martens, K. (1989) On Bryocypris grandipes Røen. Stereo-Atlas of Ostracod Shells, 16 (29), 140–147.
    Martens, K. & Meisch, C. (1985) Description of the male of Potamocypris villosa (Jurine, 1820) (Crustacea, Ostracoda). Hydrobiologia, 127, 9–15.
    Martens, K., Meisch, C. & Marmonier, P. (1991) On Klieopsis n. gen., with a redescription of Cypridopsis horai Klie, 1927 (Crustacea, Ostracoda). Bulletin van het Koninklijk Belgisch Instituut voor Natuurwetenschappen, Biologie, 61, 55–64.
    Martens, K. & Savatenalinton, S. (2011) A subjective checklist of the Recent, free-living, non-marine Ostracoda (Crustacea). Zootaxa, 2855 (1), 1–79.
    McKenzie, K.G. (1977) Illustrated generic key to South African continental Ostracoda. The Annals of the South African Museum, 74 (3), 45–103.
    McKenzie, K.G. (1982) Description of a new cypridopsine genus (Crustacea, Ostracoda) from Campbell Island, with a key to the Cypridopsinae. Proceedings of the Biological Society of Washington, 95 (4), 766–771
    Meisch, C. (2000) Freshwater Ostracoda of Western and Central Europe. In: Schwoerbel, J. & Zwick, P. (Eds.), Süßwasserfauna von Mitteleuropa. 8 (3). Spektrum Akademischer Verlag, Heidelberg, Berlin, 522 pp.
    Meisch, C., Smith, R.J. & Martens, K. (2019) A subjective global checklist of the extant non-marine Ostracoda (Crustacea). European Journal of Taxonomy, 492, 1–135.
    Müller, G.W. (1898) Ergebnisse einer zoologischen Forschungsreise in Madagaskar und Ost-Afrika 1889–1895 von Dr A Voeltzkow: Die Ostracoden. Abhandlungen der Senckenbergischen Naturforschenden Gesellschaft, 21, 255–296.
    Rome, D.R. (1965) Ostracodes. Parc National d’Upemba. Mission G.F. De Witte. Institut des Parcs nationals du Congo Belge, Bruxelles, 69, 3–71.
    Sars, G.O. (1866) Oversigt af Norges marine ostracoder. Forhandlinger I Videnskabs-Selskabet I Christiania, 1865, 1–130.
    Sars, G.O. (1910) Zoological results of the 3rd Tanganyika expedition (1904–1905). Report on Ostracoda. Proceedings of the Zoological Society of London, 48, 732–760.
    Sars, G.O. (1924) The fresh-water Entomostraca of the Cape Province (Union of South Africa). Part 2: Ostracoda. Annals of the South African Museum, 20, 105–193.
    Savatenalinton, S. (2017) Siamopsis gen. nov. and five new species of the subfamily Cypridopsinae Kaufmann, 1900 (Crustacea: Ostracoda) from Thailand. European Journal of Taxonomy, 384, 1–39.
    Savatenalinton, S. (2018) New genus of subfamily Cypridopsinae Kaufmann, 1900 (Crustacea: Ostracoda) from Thailand. European Journal of Taxonomy, 487, 1–17.
    Savatenalinton, S. (2020) A new cypridopsine genus (Crustacea, Ostracoda) from Thailand. European Journal of Taxonomy, 631, 1–16.
    Savatenalinton, S. (2022) On Cypris songkhramensis, a new species of Ostracoda (Crustacea) from Thailand. Raffles Bulletin of Zoology, 70, 440–450. 10.26107/RBZ-2022-0024
    Savatenalinton, S., Palero, F. & Mesquita-Joanes, F. (2022) Revision of the taxonomic position of Pseudocypretta Klie, 1932 (Ostracoda: Cyprididae), with a redescription P. maculata Klie, 1932. Journal of Crustacean Biology, 15, 1–13.
    Savatenalinton, S. & Suttajit, M. (2016) A checklist of recent non-marine ostracods (Crustacea: Ostracoda) from Thailand, including descriptions of two new species. Zootaxa, 4067 (1), 1–34.
    Schäfer, H.W. (1952) Über Süßwasser-Ostracoden aus der Türkei. Hidrobiologia, Ýstanbul Üniversitesi Fakültesi Hydrobiologia Araþt Enst Yayin, Serie B, 1, 7–32.
    Szwarc, A., Martens, K. & Namiotko, T. (2021) Two new Cypridopsinae Kaufmann, 1900 (Crustacea, Ostracoda) from southern Africa. Zookeys, 1076, 83–107.
    Victor, R. (1983) A new freshwater ostracod genus (Crustacea, Ostracoda) from Tokelau Islets, South Pacific Islands. Journal of Natural History, 17, 615–618.