Metaurostylopsis cheni Chen, Huang, & Song 2010
Creators: name: Kim, Kang-San
name: Park, Kyung-Min
name: Jung, Jae-Ho
name: Min, Gi-Sik
Publisher: name: Zenodo
Year: 2016
Subjects: Biodiversity
Taxonomy
Chromista
Ciliophora
Hypotrichea
Urostylida
Urostylidae
Metaurostylopsis
Metaurostylopsis cheni

description: Metaurostylopsis cheni Chen, Huang, & Song, 2010
(Table 1; Figs. 1, 2)
Diagnosis. Cell size 90­120 × 43­50 μm in vivo, flexible and yellow to greenish (Fig. 1A, 2A, C). Two types of cortical granules: large granules of oval shape, yellow to green in color, ca. 1.5 μm across, and distributed along with the cirral rows and dorsal kineties; small granules colorless and irregularly scattered, ca. 0.3 μm across (Fig. 2D, F). About 57 macronuclear nodules (Table 1). Three frontal and three to five frontoterminal cirri; buccal and III/2 cirrus present; five to eight transverse cirri; seven to eleven midventral pairs, additional three to five unpaired ventral cirri in a longitudinal row; three to four left and right marginal rows; three bipolar dorsal kineties and additional two dikineties, dorsal cilia 3­5 μm long in vivo; caudal cirri lacking (Table 1; Figs. 1B, C, 2G, H).
a Data based on protargol­impregnated specimens.
CV = coefficient of variation (%); Max = maximum; Mean =average; Min =minimum; n = number of individual investigated; SE =standard error; SD=standard deviation.All measurements in μm.
b Frontal cirri not included.
c Pretransverse ventral and transverse cirri not included.
Material examined. Mokpo Harbor (salinity, 21‰; 34º 47′N, 126º23′E), collected by Kyung­Min Park in June 2011. Yongyu­dong, Incheon (salinity, 30‰; 37°26′N 126°24′E), collected by Kang­San Kim in April, 2015.
Deposition. protargol­impregnated specimens (NIBR No. NIBRPR0000104109, NIBRPR0000104110) have been deposited in the National Institute of Biological Resources, Korea.
Habitat. Marine.
Distribution. China and Korea.
Remarks. There are six species in this genus: Metaurostylopsis marina Song et al., 2001; M. rubra Song & Wilbert, 2002; M. salina Lei et al., 2005; M. struederkypkeae Shao et al., 2008; M. cheni Chen et al., 2011; and M. antarctica Jung et al., 2011. Metaurostylopsis marina is the type species (Song et al., 2001; Berger, 2006; Shao et al., 2008; Chen et al., 2011; Jung et al., 2011). We used the morphometric data of the Mokpo population to make comparisons with congeners.
Metaurostylopsis cheni differs from M. struederkypkeae in the color of the cortical granules (yellowish to greenish vs. reddish) and in the number of cilia (3­5 vs. 4­8 in frontoterminal cirri; 7­11 vs. 12­20 in midventral pairs; 3­5 vs. 6­9 cirri in midventral row; 3­4 vs. 5­7 in left marginal rows) (Table 1) (Shao et al., 2008).
a Data based on protargol­impregnated specimens. CV= coefficient of variation (%); Max =maximum; M=Median; Mean =average; Min=minimum; n= number of individual investigated; SE =standard error; SD= standard deviation.All measurements in μm.
Metaurostylopsis cheni and M. antarctica both have two types of cortical granules. However, Metaurostylopsis cheni can be separated from M. antarctica by the number of transverse cirri (5­8 vs. 2), left marginal rows (3­4 vs. 2), and right marginal rows (3­4 vs. 1) (Table 1) (Jung et al., 2011).
description: Published as part of Kim, Kang-San, Park, Kyung-Min, Jung, Jae-Ho & Min, Gi-Sik, 2016, First description of three ciliates (Ciliophora: Stichotrichia) from Korea, pp. 468-476 in Journal of Species Research 5 (3) on pages 469-473, DOI: 10.12651/JSR.2016.5.3.468, http://zenodo.org/record/13141923