Two new species of Cypricercinae McKenzie, 1971 (Crustacea: Ostracoda) from Thailand
Abstract
Two new species of the subfamily Cypricercinae McKenzie, 1971 are described from the Western part of Thailand: Pseudostrandesia ratchaburiensis sp. nov. and Strandesia prachuapensis sp. nov. Pseudostrandesia ratchaburiensis sp. nov. is mainly characterized by a flange on the antero-ventral part of the left valve (LV), a markedly large β seta on the mandibular (Md) palp, serrated bristles on the third endite of the maxillula (Mx1), a slender caudal ramus (CR) with a long claw Ga (length ca half that of the ramus) and a relatively low number (13) of spiny whorls in the Zenker’s organ. The discovery of both males and females of Pseudostrandesia ratchaburiensis sp. nov. in the present study constitutes the first report of a sexual population in this genus, thereby allowing for a comparison of the male reproductive organs (hemipenis and Zenker’s organ) from a new species with those of other genera of Cypricercinae. Strandesia prachuapensis sp. nov. is most closely related to Strandesia odiosa (Moniez, 1892) and Strandesia flavescens Klie, 1932 as they bear similar anterior flanges on the right valve (RV). The key diagnostic features of the new Strandesia species are a large carapace (ca 1.5 mm), an angulated antero-ventral part of the LV, a weak and small anterior inner list on the LV, an anterior flange on the RV, a markedly small aesthetasc Y on the second antenna, a large β seta on the Md-palp, smooth bristles on the third endite of the Mx1 and a slender CR with a short claw Ga (length ca ⅓ of the ramus). In addition, Pseudostrandesia complexa (Victor & Fernando, 1981) comb. nov. is here proposed.
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. https://doi.org/10.1163/26660644-05202003
Ferreira V.G., Higuti J. & Martens K. 2020. Taxonomic revision of Strandesia s.s. (Crustacea, Ostracoda) from four Brazilian floodplains, with the description of three new species. Zootaxa 4760 (1): 1–74. https://doi.org/10.11646/zootaxa.4760.1.1
Horne D.J. & Colin J.-P. 2005. The affinities of the ostracod genus Cypridea Bosquet, 1852, and its allies, with consideration of implications for the phylogeny of nonmarine cypridoidean ostracods. Revue de Micropaléontologie 48: 25–35. https://doi.org/10.1016/j.revmic.2004.12.003
Klie W. 1932. Die Ostracoden der Deutschen Limnologischen Sunda-Expedition. Archiv für Hydrobiologie, Supplementband 11: 447–502.
Külköylüoğlu O., Yavuzatmaca M. & Yılmaz O. 2020. A new species of the genus Pseudostrandesia (Ostracoda: Crustacea) and first report of the genus from Palaearctic region. Zoology in the Middle East 66 (1): 37–45. https://doi.org/10.1080/09397140.2020.1675993
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. https://doi.org/10.1163/26660644-05702003
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, Berlin.
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. https://doi.org/10.5852/ejt.2019.492
Moniez R. 1892. Entomostracés d’eau douce de Sumatra et de Célèbes-2: Ostracodes. In: Weber M. (ed.) Zoologische Ergebnisse einer Reise in Niederländisch Ost-Indien 2: 129–135. E.J. Brill, Leiden. Available from https://doi.org/10.5962/bhl.title.52289 [accessed 19 Jan. 2021].
Savatenalinton S. 2014. Ostracods (Crustacea: Ostracoda) from the floodplain of the Chi River, Mahasarakham Province, Northeast Thailand, with the first record of male Tanycypris siamensis Savatenalinton & Martens, 2009. Zootaxa 3838 (2): 195–206. https://doi.org/10.11646/zootaxa.3838.2.4
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. Species diversity of ostracods (Crustacea: Ostracoda) from rice fields in Northeast Thailand, with the description of a new Tanycypris species. Zootaxa 4362 (4): 499–516. https://doi.org/10.11646/zootaxa.4362.4.2
Savatenalinton S. & Martens K. 2009a. Redescription of the type species of Strandesia Stuhlmann, 1888 and Cypricercus Sars, 1895 (Crustacea, Ostracoda, Cypricercinae), with a description of a new species of Cypricercus from South Africa. Zootaxa 2007: 1–42. https://doi.org/10.11646/zootaxa.2007.1.1
Savatenalinton S. & Martens K. 2009b. Generic revision of Cypricercinae McKenzie, 1971 (Crustacea, Ostracoda), with the description of three new genera and one new species and a 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. https://doi.org/10.11646/zootaxa.2379.1.1
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
Smith R.J., Lee J. & Chang C.Y. 2014. Nonmarine ostracoda (Crustacea) from Jeju Island, South Korea, including descriptions of two new species. Journal of Natural History 49 (1–2): 37–76. https://doi.org/10.1080/00222933.2014.946110
Victor R. & Fernando C.H. 1979a. The freshwater ostracods (Crustacea: Ostracoda) of India. Zoological Survey of India 74: 147–242.
Victor R. & Fernando C.H. 1979b. On some freshwater ostracod type specimens from Indonesia. Canadian Journal of Zoology 57: 6–12. https://doi.org/10.1139/z79-002
Victor R. & Fernando C.H. 1981. Freshwater ostracods (Crustacea: Ostracoda) of the genus Strandesia Vávra, 1895 from Malaysia, Indonesia and the Philippines. Archiv für Hydrobiologie, Suppl. 58 (4): 469–522.
Copyright (c) 2021 Sukonthip Savatenalinton
This work is licensed under a Creative Commons Attribution 4.0 International License.
Creative Commons Copyright Notices
Authors who publish with this journal agree to the following terms:
- 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.
- 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.
- 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.
