Journal
PHYCOLOGIA
Volume 53, Issue 6, Pages 614-638Publisher
INT PHYCOLOGICAL SOC
DOI: 10.2216/14-51R2.1
Keywords
Chaetoceros; Diatom; Hyalochaete; Identification; Key; Morphological Characteristic; Poroid; Seta; Spine; Ultrastructure
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Funding
- Ministry of Environment of the Republic of Korea [416-111-008]
- Sangmyung University [2014A0000172]
- Korea Environmental Industry & Technology Institute (KEITI) [416-111-008] Funding Source: Korea Institute of Science & Technology Information (KISTI), National Science & Technology Information Service (NTIS)
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Our objective was to select setae ultrastructure characteristics as identification criteria for Chaetoceros subgenus Hyalochaete. We sampled 53 Korean coastal water locations and three Chukchi Sea, Arctic Ocean sites, and we studied 22 species using light microscopy and scanning electron microscopy. We selected 12 criteria for species-specific identification: (1) point of fusion of the sibling setae, (2) spine form, (3) poroid shape, (4) spine arrangement, (5) poroid arrangement, (6) number of poroid rows per lm along the setae, (7) special intercalary setae, (8) connecting bridge-like structure on the basal part of the intercalary setae, (9) siliceous capilli on the basal part of the setae, (10) setae cross-sectional shape, (11) silicification of the setae wall and (12) direction of setae to the chain axis. Using these criteria, we constructed a dichotomous key to aid species-specific identification in the subgenus Hyalochaete.
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