New Contribution to the Morphology and Taxonomy of Four Marine ...

Table 3. Comparison of closely-related, yellow to orange marine Pseudokeronopsis species, which have been re-defined using modern methods. Measurements in µm
Characters P. flava P. carnea P. flavicans P. flavicans
Cell size in vivo 140-260 x 40-57 140-200 x 28-40 150-250 x 200-300 x 40-55
Body shape belt-like with narrowed belt-like, caudally belt-like, caudal belt-like and slender
caudal region less to not narrowed* portion clearly narrowed with narrowed
caudal region
154 W. Song et al.
Colour of cortical granules yellow orange-red yellow yellow-brownish
Colour of cell at low magnification yellow orange-red yellow bright yellow
Number of pairs of midventral cirri 28-38 22-44 25-40
Number of dorsal kineties 3-5 5-7 4-5
Number of membranelles 43-59 39-80 46-66
Number of cirral pairs in bicorona ca 5 ca 5-7 ca 7 (5-9)
Number of frontoterminal cirri 3** 2** 2
Number of transverse cirri 1-3 5-9 ca 5 3-6
Position of contractile vacuole anterior 1/3 of anterior 2/3 of
cell length
cell length
Distance from the posterior end 30 (22-42) 5-39 ca 15
of midventral rows to
the anteriormost transverse cirri
Gap between posterior end always conspicuous small to small and small and
of midventral rows conspicuous inconspicuous inconspicuous
and transverse cirri
Geographical region North Sea, Denmark North Sea, German/ North Sea, Germany Yellow Sea, China
Denmark & Mediterranean,
Yugoslavia
References Wirnsberger et al. 1987 Wirnsberger et al. 1987 Kahl, 1932 present paper
data absent; * according to original descriptions; ** counted from the drawings