Anteholosticha sigmoidea Berger 2003
Anteholosticha sigmoidea (Foissner, 1982) Berger, 2003 (Figs 1, 2; Table 1) Voucher slides. Three slides (NIBRPR0000110238–NIBRPR0000110240) with protargol-stained specimens were deposited in the National Institute of Biological Resources (NIBR), South Korea. Gene sequence. The 18S rRNA gene sequenc...
| Main Authors: | , , , |
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| Format: | Other/Unknown Material |
| Language: | unknown |
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Zenodo
2021
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| Subjects: | |
| Online Access: | https://doi.org/10.5281/zenodo.4640465 http://treatment.plazi.org/id/EC41E57CFFFEFF9C0FC5F9490540FEDC |
| Summary: | Anteholosticha sigmoidea (Foissner, 1982) Berger, 2003 (Figs 1, 2; Table 1) Voucher slides. Three slides (NIBRPR0000110238–NIBRPR0000110240) with protargol-stained specimens were deposited in the National Institute of Biological Resources (NIBR), South Korea. Gene sequence. The 18S rRNA gene sequence of the present Antarctic population was deposited in the Gen-Bank under the accession number MN864520. Morphological description of the Antarctic population. Size in vivo 90–150 × 25–35 μm, 67–95 × 9–19 μm after protargol preparations (Figs. 1A, B; 2A, H). Body outline usually elongated elliptical, left and right cell margins slightly convex or almost straight in vivo (Figs. 1A, 2A). Cell colorless to grayish at low magnification. Contractile vacuole left of mid-body, about 10 μm in diameter during diastole, with collecting canals (Figs. 1A; 2 B–E). Colorless cortical granules roughly spherical, 0.5–1.0 μm in diameter, distributed irregularly on both the ventral and dorsal surface, stain with protargol (Figs. 1E, F; 2G, L, M). Cytoplasm colorless, containing many food vacuoles and lipid droplets (ca. 1–4 μm across). Feeds on algae and bacteria. Macronuclear nodules size 4.0–10.0 × 1.5–4.0 μm in protargol preparations, 13–18 in number, arranged in left body portion. Two to five micronuclei sized 1.5–4.0 × 1.0–3.0 μm protargol impregnation (Figs. 1A, D; 2H, K). Adoral zone approximately 26.5% of cell length in protargol preparations, the base of the largest membranelles about 8 μm long, composed of 22–28 membranelles. Paroral and endoral membranes crossing at the level of buccal cirrus (Figs. 1B; 2H, J). All cirri relatively fine, mostly 11–15 μm long in vivo. Three frontal cirri arranged in the oblique row near the anterior body end; two frontoterminal cirri behind the rightmost frontal cirrus; buccal cirrus near the middle of the paroral membrane; two pretransverse cirri arranged almost at the same level; midventral complex composed of 17–29 midventral cirri, arranged in a zigzag pattern, commencing near the level ... |
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