Siamopsis gen. nov. and five new species of the subfamily Cypridopsinae Kaufmann, 1900 (Crustacea: Ostracoda) from Thailand

Authors

  • Sukonthip Savatenalinton Department of Biology, Plant and Invertebrate Taxonomy and its Applications Research Unit, Faculty of Science, Mahasarakham University, Maha Sarakham 44150

DOI:

https://doi.org/10.5852/ejt.2017.384

Keywords:

Cypridopsinae, biodiversity, taxonomy, new species, Thailand

Abstract

Siamopsis gen. nov., described here, belongs to a group of genera with the right valve overlapping the left valve in the subfamily Cypridopsinae Kaufmann, 1900 of the family Cyprididae Baird, 1845. The distinguishing characters of the new genus are in the morphology of its valves and soft parts. The postero-dorsal margin of the internal left valve is plate-like protruded. The morphology of this plate varies in different species, e.g., some species bear a tooth-like tubercle on the plate. The posterior margin of the right valve is recurved inwardly at ca mid-height, resulting in the occurrence of a lobe-like expansion that can clearly be seen in the dorsal and caudal views of the carapace. In addition, the other diagnostic soft part features of the new genus are the cylindrical caudal ramus, the presence of two t-setae on the female A2 penultimate segment, the very elongated terminal segment of the Mx1 palp, the morphology of the two large bristles (tooth bristles) of the Mx1 third endite (one smooth, one serrated) and the absence of d-seta on T1. In the present paper, five new species are described under this new genus: Siamopsis renateae gen. et sp. nov., S. suttajiti gen. et sp. nov., S. conspecta gen. et sp. nov., S. khoratensis gen. et sp. nov. and Siamopsis planitia gen. et sp. nov. A key to the species of Siamopsis gen. nov. is also provided.

References

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.

De Deckker P. 1981. Ostracoda from Australian inland waters – Notes on taxonomy and ecology. Proceedings of the Royal Society of Victoria 93 (1): 43–85.

Dumont H. & Martens K. 1996. The freshwater microcrustacea of Easter Island. Hydrobiologia 325: 83–99. https://doi.org/10.1007/BF00028269

Hartmann G. 1964. Asiatische Ostracoden. Systematische und zoogeographische Untersuchungen. Internationale Revue der gesamten Hydrobiologie, Systematische Beihefte 3: 1–155.

Higuti J. & Martens K. 2012. On a new cypridopsine genus (Crustacea, Ostracoda, Cyprididae) from the Upper Paraná River floodplain (Brazil). Zootaxa 3391: 23–38.

Horne D.J. & Smith R.J. 2004. First British record of Potamocypris humilis (Sars, 1924), a freshwater ostracod with a disjunct distribution in Europe and Southern Africa. Bollettino della Società Paleontologica Italiana 43 (1–2): 297–306.

Karanovic I. 2012. Recent Freshwater Ostracods of the World: Crustacea, Ostracoda, Podocopida. Springer-Verlag, Berlin and Heidelberg. https://doi.org/10.1007/978-3-642-21810-1

Külköylüoğlu O., Meisch C. & Rust R.W. 2003. Thermopsis thermophila n. gen. n. sp. from hot springs in Nevada, U.S.A. (Crustacea, Ostracoda). Hydrobiologia 499: 113–123. https://doi.org/10.1023/A:1026308514466

Martens K. 1985. Tanganyikacypridopsis gen. n. (Crustacea, Ostracoda) from Lake Tanganyika. Zoologica Scripta 14 (3): 221–230.

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. https://doi.org/10.1007/BF00004658

Martens K. & Savatenalinton S. 2011. A subjective checklist of the Recent, free-living, non-marine Ostracoda (Crustacea). Zootaxa 2855: 1–79.

Martens K., Meisch C. & Marmonier P. 1991. On Klieopsis n. gen., with a redescription of Cypridpsis horai Klie, 1927 (Crustacea, Ostracoda). Bulletin van het Koninklijk Belgisch Instituut voor Natuurwetenschappen, Biologie 61: 55–64.

Meisch C. 2000. Freshwater Ostracoda of Western and Central Europe. In: Schwoerbel J. & Zwick P. (eds) Süßwasserfauna von Mitteleuropa 8 (3): 1−522. Spektrum Akademischer Verlag, Heidelberg and Berlin.

Sars G.O. 1903 Freshwater Entomostraca from China and Sumatra. Archiv for Mathematik og Naturvidenskab 25: 3–44.

Savatenalinton S. 2015. On three new species of non-marine ostracods (Crustacea: Ostracoda) from Northeast Thailand. Zootaxa 3914 (3): 275–300. https://doi.org/10.11646/zootaxa.3914.3.3

Savatenalinton S. 2017. A new genus and four new species of subfamily Cyclocypridinae (Crustacea, Ostracoda) from Thailand. Zootaxa 4243 (2): 329–365. https://doi.org/10.11646/zootaxa.4243.2.4

Savatenalinton S. & Martens K. 2009. Generic revision of Cypricercinae McKenzie, 1971 (Crustacea, Ostracoda), with description of three new genera and one new species and phylogenetic analysis of the subfamily. Hydrobiologia 632 (1): 1–48. https://doi.org/10.1007/s10750-009-9826-5

Savatenalinton S. & Martens K. 2010. On the subfamily Cypricercinae McKenzie, 1971 (Crustacea, Ostracoda) from Thailand, with the description of six new species. Zootaxa 2379: 1–77.

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. https://doi.org/10.11646/zootaxa.4067.1.1

Savatenalinton S., Borgonie G. & Martens K. 2008. On Thaicythere srisumonae n. gen., n. sp. (Ostracoda) from Thailand, with notes on the phylogeny of the subfamily Timiriaseviinae Mandelstam, 1960. Crustaceana 81: 411–432. https://doi.org/10.1163/156854008783797543

Tressler W.L. 1937. Ostracoda. Mitteilung 18 von der Wallacea-Expedition Woltereck 1931–32. Internationale Revue der Gesamten Hydrobiologie und Hydrographie 34 (3–5): 188–207.

Victor R. & Fernando C.H. 1981. An Illustrated Key to the Freshwater Ostracod Genera of the Oriental Region. Department of Biology, University of Waterloo, Canada.

Downloads

Published

2017-12-19

How to Cite

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). https://doi.org/10.5852/ejt.2017.384

Issue

No. 384 (2017): Siamopsis gen. nov. and five new species of the subfamily Cypridopsinae Kaufmann, 1900 (Crustacea: Ostracoda) from Thailand

Section

Zoology

License

Creative Commons Copyright Notices

Authors who publish with this journal agree to the following terms:

  1. Authors retain copyright and grant the journal right of first publication with the work simultaneously licensed under a Creative Commons Attribution License (CC BY 4.0) that allows others to share the work with an acknowledgement of the work's authorship and initial publication in this journal.
  2. Authors are able to enter into separate, additional contractual arrangements for the non-exclusive distribution of the journal's published version of the work (e.g., post it to an institutional repository or publish it in a book), with an acknowledgement of its initial publication in this journal.
  3. Authors are NOT ALLOWED TO post their work online (e.g., in institutional repositories or on their website) prior to and during the submission process, as it can lead to taxonomic issues.