Two new species of Cypricercinae McKenzie, 1971 (Crustacea: Ostracoda) from Thailand Author Savatenalinton, Sukonthip Department of Biology, Faculty of Science, Mahasarakham University, Maha Sarakham 44150, Thailand sukonthip.s@msu.ac.th text European Journal of Taxonomy 2021 2021-01-27 733 19 41 journal article 8643 10.5852/ejt.2021.733.1217 3f7cd05b-a293-48c9-878a-620f2034700e 2118-9773 4471417 B380C47C-520D-448E-B5FE-9E63AB32A9AE Key to Pseudostrandesia species 1. Cp in dorsal view with beak-like anterior end .................................................................................. 2 – Cp in dorsal view without beak-like anterior end ............................................................................. 3 2. Cp in dorsal view with beak-like posterior end, penultimate segment of A2 not divided .................. ........................................................................................................... P. striatoreticulata ( Klie, 1932 ) – Cp in dorsal view with rounded posterior end, penultimate segment of A2 divided .......................... ........................................................................................ P. gaetani Savatenalinton & Martens, 2010 3. Cp with large posterior LV overlap over RV, Cp in frontal view not oblique .................................... ............................................................................... P. thailandensis Savatenalinton & Martens, 2010 – Cp without large posterior LV overlap over RV ............................................................................... 4 4. LV with antero-ventral lip-like flange ............................................................................................... 5 – LV without antero-ventral flange ...................................................................................................... 6 5. β-seat on Md-palp markedly large, h3 seta on T2 remarkably long ........ P. ratchaburiensis sp. nov. – β-seat on Md-palp small, h3 seta on T2 short ... P. complexa ( Victor & Fernando, 1981 ) comb. nov. 6. Cp in lateral view with narrow, bluntly pointed posterior end, very small overlap anteriorly ........... .......................................................................................................... P. calapanensis (Tressler, 1937) – Cp in lateral view with rounded posterior end .................................................................................. 7 7. Cp in lateral view subovate, LV without anterior inner list ................................................................ ...................................................................... P. guleni Külköylüoğlu, Yavuzatmaca & Yılmaz, 2020 – Cp in lateral view elongated, LV with anterior inner list .................................................................. 8 8. Cp with large anterior overlap, Cp oblique in frontal view ................................................................ ....................................................................................... P. mamarilorum ( Victor & Fernando, 1981 ) – Cp with small anterior overlap ......................................................................................................... 9 9. Cp in lateral view with greatest height situated at mid-length, one bristle on Mx1 3 rd endite smooth and one serrated ................................................................. P. ovata Savatenalinton & Martens, 2010 – Cp in lateral view with greatest height situated before mid-length, both bristles on Mx1 3 rd endite serrated .............................................................. P. petchabunensis Savatenalinton & Martens, 2010