Associated observations |
Date Added
November 20, 2022
04:07 PM EST
Description
Remanella microstoma (Dragesco, 1954b) Foissner, 1996
From the Intertidal benthos of marine estuarine bay Acabonac Harbor . They are quite abundant and range in length from 80 to 110 microns with a flattened cytosome, a parrots beak- like anterior which I saw one use like a can opener to pry at a potential meal, and a pointed angular bent tail. In my pictures you can clearly see the single anterior Muller vesicle and the two round macronuclei. The following descriptions are from (2): "Remanella microstoma (Dragesco, 1954b) Foissner, 1996 . The original description was “140 um long, beak and buccal field small and inconspicuous, no cortical granules. . .” (Dragesco 1954b). According to the original illustration, the most significant features of this organism are: (1) buccal field about 15% of body length; (2) a distinct, narrow tail that is almost 25% of body length; (3) single Müller vesicle.
The well-known karyorelictid ciliate genus Remanella Foissner, 1996 is widely accepted to be a clearly-outlined taxon (Dragesco 1960; Foissner 1996; Lynn 2008; Xu et al. 2012). Although Remanella shares almost the same infraciliature with Loxodes, it differs from the latter by living in marine habitats, and by having a tail-like posterior body portion, organic spicules forming a cytoplasmic skeleton, cnidocyst-like extrusomes, and Müller vesicles containing a single, or only a few, granules (Foissner 1996). There are, currently, 19 nominal species assigned to this genus.
Imaged in Nomarski DIC using Olympus BH2S under SPlan 40x and 20x objectives plus phone cropping".
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Diversity of the karyorelictid ciliates: Remanella (Protozoa, Ciliophora, Karyorelictida) inhabiting intertidal areas of Qingdao, China, with descriptions of three species
Yuan Xu, Miao Miao, Alan Warren, Weibo Song. Systematics and Biodiversity (2012), 10(2): 207–219 https://doi.org/10.1080/14772000.2012.681713
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Phylogeny and systematic revision of the karyorelictid genus Remanella (Ciliophora, Karyorelictea) with descriptions of two new species. Yuan Xu, Shan Gao,∗, Xiaozhong Hu, Khaled A.S. Al-Rasheid, Weibo Song. February 2013 European Journal of Protistology 49(3)
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