Institute of Evolution and Marine Biodiversity, & Key Laboratory of Mariculture, Ministry of Education, Ocean University of China, Qingdao 266003, China. Electronic address:
Published: October 2017
AI Article Synopsis
Article Abstract
Most species in the anaerobic ciliate family Caenomorphidae Poche, 1913 lack detailed descriptions based on modern morphologic and molecular methods. In this report, two species, Caenomorpha medusula Perty, 1852 and Sulfonecta uniserialis (Levander, 1894) Jankowski, 1978, were isolated from freshwater anaerobic sediments in Qingdao, China. Another population of C. medusula was recorded from Boise, Idaho, USA. We reinvestigated live morphology, ciliature, and the small-subunit (SSU) rRNA gene sequence of both species. The current study supports the opinion of Jankowski that, due to the variation in macronuclear nodule number, this character is of limited taxonomic significance in C. medusula. Scanning electronic micrographs clearly reveal that this species has one posterior spine. The China population of Sulfonecta uniserialis corresponds well with previously described populations in having a single macronucleus, a complex posterior spine, and one bell kinety. Our phylogenetic analyses reveal that the Caenomorphidae is monophyletic. However, the placement of the family is uncertain as it forms a closer relationship with the Litostomatea but with only a medium support value.
Guangzhou Key Laboratory of Subtropical Biodiversity and Biomonitoring, School of Life Science, South China Normal University, Guangzhou 510631, China. Electronic address:
Ciliate species within the class Armophorea are widely distributed in various anaerobic environments, hence they are of great interest to researchers studying evolution and adaptation of eukaryotes to extreme habitats. However, phylogenetic relationships within the class remain largely elusive, most especially assignment of the order Armophorida and classification within the family Metopidae. In this study, we newly sequenced transcriptomes and the SSU rDNA of five armophorean species, Sulfonecta cf.
Institute of Evolution and Marine Biodiversity, & Key Laboratory of Mariculture, Ministry of Education, Ocean University of China, Qingdao 266003, China. Electronic address:
Most species in the anaerobic ciliate family Caenomorphidae Poche, 1913 lack detailed descriptions based on modern morphologic and molecular methods. In this report, two species, Caenomorpha medusula Perty, 1852 and Sulfonecta uniserialis (Levander, 1894) Jankowski, 1978, were isolated from freshwater anaerobic sediments in Qingdao, China. Another population of C.
