Kentrophyllum setigerum
Creators: name: Kim, Se-Joo
name: Min, Gi-Sik
Publisher: name: Zenodo
Year: 2016
Subjects: Biodiversity
Taxonomy
Chromista
Ciliophora
Gymnostomatea
Pleurostomatida
Amphileptidae
Kentrophyllum
Kentrophyllum setigerum

description: Kentrophyllum setigerum (Quennerstedt, 1867)   
 ȒAEṻṄ나șȁ섬AEệ (Table 1, Fig. 2)   
 Loxophyllum setigerum Quennerstedt, 1867, p. 6, Pl. I 4.   
 Loxophyllum verrucosum Dragesco, 1965, p. 373, Fig. 12.   
 Kentrophyllum setigerum Petz et al., 1995, p. 55; Wu et al., 2015, p. 11.   
 Material examined. Specimens were collected from the Bongpo­port (38°17′N, 128°33′E), Gangwon­do in the East Sea on 12­13 Mar 2008. Environmental conditions of the sampling site were 10.6°C, ca 14.8 psu, and pH ca 8.55.   
 Description. Live cell size 150­200 × 60­80 μm, wide and flat leaf­shaped in outline; laterally compressed; many longitudinal shallow grooves appeared (Fig. 2A, E­G). Spines thin, needle­shaped, usually detectable in live specimens, evenly spaced along body margin, except cytostome region; invisible after protargol staining (Fig. 2E). Peribuccal papillae placed along cytostome, conspicuous, 40­56 μm long in live specimens (Fig. 2E, J).   
Four to eleven Ma connected by thread­like funiculus, leaned on ventral side of body center, usually detectable in live specimens; each nodule egg­shaped, about 10× 7 μm after fixation; Mi not observed (Fig. 1F, H, I, M). 6­9 CVs recognized along dorsal margin, usually 10­13 μm in diameter (Fig. 1G).  
Ex bar­shaped, curved, about 12 μm long; recognizable in live cells; densely distributed along whole body, except cytostome region; some scattered inside body (Fig. 2 H­J, M).  
Cytoplasm slightly grayish colored, with many large and shining globules (Fig. 2E, F, J). Sutures formed on right and left sides (Fig. 2C, D, G, K). Cirri and membranelles of feeding hypotrichs detected after fixation (Fig. 2M). Movement by slow gliding, or swimming.  
 Ciliary pattern typical of Kentrophyllum (Fig. 2C, D, L). Two PK placed around oral slit, PK1 on left, and PK2 on right; kinetid rows more tightly packed than somatic kineties; PK1 contains dense dikinetids in anterior 2/3, and a continuous row of monokinetids, reaches to posterior end; PK2 composed of dikinetids, enclosed full­body, formed a circle. DB not detected. All somatic kineties composed of monokinetids; 29­32 LSK, with PK1; 34­40 RSK, including PK2. Nd stretches to 4/5 of the cytoplasm region.   
 Distribution. USA, Japan, Africa, and Korea (This study).   
 Deposition. A voucher slide with protargol­impregnated specimens was deposited in the National Institute of Biological Resources in Korea (NIBRPR0000107166).   
 Accession number of SSU rDNA. KX581243­KX 581245.   
 Remarks. Kentrophyllum setigerum was originally described by Quennerstedt (1867). After that, it had been an ambiguous status with its congeners, K. pseudosetigerum, K. qingdaoense, K. verrucosum. Recently, the genus Kentrophyllum was revised by Wu et al. (2015) and then it have been improved the definition of K. setigerum. Characteristics of the Korean population correspond very well with the African population (Dragesco, 1965) synonymized by Wu et al. (2015) in most respects, such as habitat, body shape and size, status of spines and peribuccal papillae, and the number of nuclei, contractile vacuoles and somatic kineties.
description: Published as part of Kim, Se-Joo & Min, Gi-Sik, 2016, New records of two pleurostomatids (Ciliophora: Litostomatea) from Korea, pp. 343-347 in Journal of Species Research 5 (3) on pages 345-347, DOI: 10.12651/JSR.2016.5.3.343, http://zenodo.org/record/13141993