中国成英最大进口国J. Ocean Univ. China(Oceanic and Coastal Sea Rearch)
doi/10.1007/s11802-019-4096-y
s videoISSN 1672-5182, 2019 18 (3): 663-674
江门翻译www.ouc.edu/xbywb/
E-mail:xbywb@ouc.edu
Morphological Studies on Four Brackish Water Ciliates
of the Class Spirotrichea (Protista, Ciliophora)
SONG Yuan1), LIU Yongqiang2), PAN Bo2), LUO Xiaotian3), *, SONG Wen2), *,
2013考研英语二>全外教
and WARREN Alan4)
1) College of Marine Life Sciences, Ocean University of China, Qingdao 266003, China
iapps2) Institute of Evolution and Marine Biodiversity, Ocean University of China, Qingdao 266003, China
3) Key Laboratory of Aquatic Biodiversity and Conrvation of Chine Academy of Sciences, Institute of
Hydrobiology, Chine Academy of Sciences, Wuhan 430072, China
4) Department of Life Sciences, Natural History Muum, Cromwell Road, London SW7 5BD, UK
(Received December 13, 2018; revid February 20, 2019; accepted March 1, 2019)
bumbler© Ocean University of China, Science Press and Springer-Verlag GmbH Germany 2019
Abstract We reinvestigate the morphology of two oligotrich and two hypotrich ciliates collected from the coasts of north and south China, viz., Parallelostrombidium obesum Liu et al., 2015, Spirostrombidium apourceolare Liu et al., 2013, Protogastrostyla pulchra (Pereyaslawzewa, 1886) Gong et al., 2007, and Uncinata bradburyae (Gong et al., 2001) Luo et al., 2015. All the popula- tions match well with the original samples identified in previous studies. Supplemental taxonomic data were supplied for the four species of the new populations. The species Parallelostrombidium obesum is characterid by its dorsal-ventrally flattened body shape with anterior and posterior ends transverly truncating, as well as two thigmotactic membranelles and girdle kinety that spirals aroun越语翻译
d the cell one and a half times. Spirostrombidium apourceolare is characterid by its elongate ellipsoidal and dorsal-ventrally flattened body shape, two thigmotactic membranelles, about 11–27 ovoid macronuclear nodules, and girdle kinety that spirals around the cell twice with two undulations. Protogastrostyla pulchra is characterid by its elongate body shape and unique, caudally located food vacuole. Bad on the new populations, we described the smaller cortical granules, clustered around dorsal bristles for the first time. The new population of Uncinata bradburyae shares the diagnostic features with the type population, which include prominent beak-like projection in anterior region, the conspicuous gap of adoral zone, proximalmost adoral membranelles distinctly elongated, and infraciliature.
Key words hypotrichs ciliates; oligotrichs; Parallelostrombidium; Protogastrostyla; Spirostrombidium; taxonomy; Uncinata
1 Introduction
ldomThe ciliated protists are a large group of microbial eu- karyotes that play vital roles in cycling of materials and transfer of energy in aquatic ecosystems (Caron et al., 2012; Gao et al., 2017; Worden et al., 2015; Xu et al., 2017). The class Spirotrichea is an extremely diver group, which typically ha
cabis a paroral membrane and a well- developed adoral zone of polykinetids that spirals out over the anterior end, and sometimes completely en- clos it. The class is divided into ven subclass, in- cluding the subclass Hypotrichia and Oligotrichia (Lynn, 2008).
Oligotrich ciliates are important components of the marine microzooplankton and episodically dominate ma- rine planktonic ciliate communities (Pierce and Turner, 1992). They are characterized by their conspicuous adoral * Corresponding authors. E-mail:
E-mail: luoxiaotian@ihb.ac zone of membranelles arranged in two ctions and so- matic ciliature comprising a girdle and a ventral kinety (Lynn, 2008). In recent years, many known species have been redescribed bad on their infraciliature revealed by protargol-staining techniques (Agatha, 2004, 2011; Krai- ner, 1991; Liu et al., 2011a, 2011b, 2015, 2017; Lynn and Gilron, 1993; Petz et al., 1995; Song and Bradbury, 1998; Song et al., 2015a, 2015b, 2018a, 2018b; Wang et al., 2018; Xu et al., 2009; Yan et al., 2017; Zhang et al., 2017; Zhao et al., 2017;).
The subclass Hypotrichia Stein, 1859, comprising about 800 described species, is a highly diver group with re- spect to morphological and ontogenetic patterns (Berger, 1999, 2006, 2008, 2011; Chen et al., 2013, 2017a; Dong et al., 2016; Foissner, 2016; Huang et al., 2018; Kumar et al., 2015,
2017; Luo et al., 2017; Pan et al., 2016; Shao et al., 2014). Recent investigations of new habitats and the increasing applications of molecular techniques have shown that the diversity of hypotrich ciliates is under- estimated (Chen et al., 2011, 2015, 2017b; Liu et al., 2017; Lu et al., 2017; Paiva et al., 2016; Park et al., 2017;
