TY - JOUR
TI - Morphological Redescriptions of Aspidisca magna Kahl, 1932 and A. leptaspis Fresenius, 1865 (Ciliophora, Euplotida), with Notes on Ontogenesis in A. magna
AU - Li, Liqiong
AU - Zhang, Qianqian
AU - Al-Rasheid, Khaled A. S.
AU - Kwon, Choon Bong
AU - Shin, Mann Kyoon
TI - Morphological Redescriptions of Aspidisca magna Kahl, 1932 and A. leptaspis Fresenius, 1865 (Ciliophora, Euplotida), with Notes on Ontogenesis in A. magna
AB - The largest known Aspidisca species, A. magna Kahl, 1932, was found from coastal waters near Qingdao (Tsingtao), northern China, and investigated using both the “wet” silver nitrate and protargol staining method. Based on the living observation and impregnated individuals, improved diagnosis and morphometric data are provided. As an additional contribution, the morphogenesis in Aspidisca magna during binary fission was revealed and summarized as follows: 1) the parental adoral zone of membranelles and paroral membranęare retained by the proter; 2) the oral primordium of the opisthe develops hypoapokinetally behind the posterior part of the adoral zone of membranelles; 3) five frontoventral-transverse cirral anlagen are formed de novo, initially as primary primordia, and develop into 3:3:2:2:1 cirri from left to right, respectively in both dividers; 4) the leftmost frontoventral cirrus is generated from an independently formed cirral anlage in both dividers. In the present work, Chinese and Korean populations of A. leptaspis Fresenius, 1865 were investigated respectively to support the importance of living characteristics in identification of Aspidisca species. The isolation of A. magna and A. leptaspis from other congeners are also firmly demonstrated by the SSU rRNA gene sequence alignments.
VL - 2010
IS - Volume 49, Issue 4
PY - 1970
SN - 0065-1583
C1 - 1689-0027
SP - 327
EP - 337
UR - https://ejournals.eu/en/journal/acta-protozoologica/article/morphological-redescriptions-of-aspidisca-magna-kahl-1932-and-a-leptaspis-fresenius-1865-ciliophora-euplotida-with-notes-on-ontogenesis-in-a-magna
KW - Aspidisca
KW - Euplotida
KW - morphogenesis
KW - morphology
KW - silver staining