Stentor tartari Murthy & Bai 1974
Creators: name: Taher, Md Abu
name: Kabir, Ahmed Salahuddin
name: Shazib, Shahed Uddin Ahmed
name: Kim, Min Seok
name: Shin, Mann Kyoon
Publisher: name: Zenodo
Year: 2020
Subjects: Biodiversity
Taxonomy
Chromista
Ciliophora
Heterotrichea
Heterotrichida
Stentoridae
Stentor
Stentor tartari

description: Stentor tartari Murthy & Bai, 1974
(Figs. 6–8, Tables 1, 2)
Improved diagnosis. Body size 200–355 × 85–135 µm in vivo (on average 300 × 105 µm), 250–700 × 70–135 µm when extended, about 200 × 160 µm after protargol impregnation. Body slender trumpet-shaped to conical when extended, irregular pinkish and colorless cortical granules scattered throughout whole body, symbiotic green algae present, contractile vacuole located in anterior 1/3 of body near left margin with a collecting canal, 8–13 peristomial kineties, 62–106 somatic ciliary rows, 1–4 (average 2) macronuclear nodules located at mid-body. 5–18 micronuclei located around macronuclear nodules.
Locality and habitat. Small freshwater pond (0 psu), Cheongnyang-myeon, Ulju-gun, Ulsan, Korea (35°31′ 47°N, 129°13′ 41°E).
Voucher material. A protargol-stained slide with fixed specimens was deposited at the National Institute of Biological Resources (NIBR), Incheon, Korea, with registration number NIBRPR0000107178. The voucher specimens are marked by a black ink circles on the slide.
Description. The freely motile cell is inverted pear-shaped and size ranges, 200–355 × 85–135 µm (on average 300 × 105 µm) in vivo (Fig. 7A). After extension, when cell relaxed, the body looks like trumpet-shaped and size ranges, 250–700 µm in length and 70–135 µm in width in the peristomial area. Specimens shrink considerably after protargol impregnation, i.e., 95–310 × 75–230 µm (on average 200 × 160 µm) (Fig. 8A). Two types of cortical granules, colored and colorless, irregularly arranged between somatic kineties (Fig. 7C, D). The colored cortical granules appeared pinkish red, reddish, or brown red, round or oval-shaped 0.5–1 µm in diameter (Fig. 7C, D). Density of the colored cortical granules is higher in anterior than in mid to posterior parts of body (Fig. 7A). Colorless cortical granules are smaller than reddish granules; shape of colorless cortical granules is round to oval, 0.3–0.5 µm in diameter (Fig. 7C). Transparent cortex makes cytoplasmic organelles easily identifiable (Fig. 7A, C, F). Sixtytwo to 106 parallel somatic kineties composed of dikinetids longitudinally arranged parallel to antero-posterior axis of cell (Fig. 6E, F, 7C, 8B). Each somatic cilium is 6–12 µm long (Fig. 7D). Average gap between adjacent somatic kineties is 7 µm in vivo. Mitochondria (?)-like organelles distributed on pellicle slightly more densely packed near somatic kineties (Fig. 7D, arrowhead). One contractile vacuole with a long collecting canal located left of the buccal cavity about 35 µm in diameter during diastole (Fig. 6A, 7G). Eight to 17 peristomial kineties were observed in peristomial region (Fig. 6E, 7B, 8B) and size of peristomial cilia was similar to the size of somatic cilia. Buccal pouch absent. Adoral zone of membranelles conspicuous consist of 110–180 membranelles (Fig. 6E, 7B, 8B). Adoral zone of membranelles surrounds the peristome and finally ends at the buccal cavity (Fig. 7A, 8A). The longest adoral membranelle, 12 µm long. The Paroral membrane is typical of the genus, consisted of a single and continuous row of thin cilia, 20–35 µm long (Fig. 6E, 8B). Nuclear apparatus comprised of 1–5 spherical macronuclear nodules (on average 2), about 20–35 µm in diameter in vivo, usually located at the mid-body, however the position of macronuclear nodules is not fixed (Fig. 7A, F, 8A, C). Five to 18 spherical micronuclei with a diameter of 1–2 µm in vivo adjacent to macronuclear nodules (Fig. 7F, 8C). Symbiotic algae, 2–4 µm in diameter in vivo, present throughout body giving it a dark to light green appearance (Fig. 7A, E, 8A). Food vacuoles are 5–30 µm in diameter; contain bacteria, diatoms as food (Fig. 6A). Lipid droplets 2–5 µm in diameter scattered throughout body. Holdfast organelle present at posterior end of cell (Fig. 7E, inset: arrowhead); colored cortical granules densely packed in this region exhibiting a red appearance (Fig. 7A).
description: Published as part of Taher, Md Abu, Kabir, Ahmed Salahuddin, Shazib, Shahed Uddin Ahmed, Kim, Min Seok & Shin, Mann Kyoon, 2020, Morphological Redescriptions and Molecular Phylogeny of Three Stentor Species (Ciliophora: Heterotrichea: Stentoridae) from Korea, pp. 435-452 in Zootaxa 4732 (3) on pages 441-442, DOI: 10.11646/zootaxa.4732.3.6, http://zenodo.org/record/3667262