Philodina parvicalcar De Koning. This 1947

Philodina parvicalcar De Koning, 1947 Figure 5 Material. Two specimens found in mosses around Jangyeol-ri, Bukpyeong-myeon, Jeongseon-gun, Gangwon-do. The spurs of Philodina parvicalcar seem to be morphologically similar to those of P. koreana Song & Lee; however, the outer margin of interspace between spurs overhangs the dorsal margin of the spur pseudosegment in P. parvicalcar, while that coincides with the dorsal margin of the spur pseudosegment in P. koreana (Song & Lee 2017). In addition, this species is easily distinguished from P. koreana by the morphology of disc retractor. The disc retractor of P. koreana is slightly convex and trilobed medially while that of P. parvicalcar is U-shaped with convex sides and bilobed medially (Fig. 5a). De Koning (1947) didn���t mention the morphology of disc retractor in the original description and Bielańska-Grajner et al. (2011) didn���t, either, in their report on Polish bdelloids. The upper lips of the Korean specimens were arched and very slightly notched medially, which is similar to the upper lip in Fig. 38e of the original illustration. The spurs of the Korean specimens were very small, fingertipshaped and most similar to spurs in Fig. 38c of the original illustration (De Koning 1947). This species is very rare and has been reported from only two countries, Turkey (Kaya 2013; Kaya et al. 2009) and Poland (Bielańska-Grajner et al. 2011), after the description from the Netherlands by De Koning (1947). Measurements. Corona width 61 ��m. Cingulum width 46 ��m. Cingulum pad width 48 ��m. Spur length 3 ��m.
Published as part of Song, Min Ok & Lee, Chang-Ho, 2020, Descriptions of two new species of Philodina (Rotifera, Bdelloidea), with notes on seven rare bdelloids from Korea, pp. 253-276 in Zootaxa 4772 (2) on pages 263-264, DOI: 10.11646/zootaxa.4772.2.2, http://zenodo.org/record/3816500
{"references":["De Koning, M. (1947) Nieuwe Bdelloide Rotatorien. Biologisch Jaarboek, Dodonaea, 14, 184 - 205.","Song, M. O. & Lee, C. - H. (2017) A new and five rare bdelloids from Korea. Zootaxa, 4242 (3), 529 - 547. https: // doi. org / 10.11646 / zootaxa. 4242.3.6","Bielanska-Grajner, I., Ejsmont-Karabin, J. & Yakovenko, N. (2011) Bdelloidea (Rotifera) from the Tatra National Park, with some species newly found in Poland. Fragmenta Faunistica, 54, 103 - 111. https: // doi. org / 10.3161 / 00159301 FF 2011.54.2.103","Kaya, M. (2013) Terrestrial bdelloid rotifers from Erzurum (eastern part of Turkey). Turkish Journal of Zoology, 37, 413 - 418. https: // doi. org / 10.3906 / zoo- 1211 - 32","Kaya, M., Herniou, E. A., Barraclough, T. G. & Fontaneto, D. (2009) A faunistic survey of bdelloid rotifers in Turkey. Zoology in the Middle East, 48, 114 - 116. https: // doi. org / 10.1080 / 09397140.2009.10638379"]}