Asterionellopsis tropicalis (Bacillariophyceae) : a new tropical species found in diatom accumulations
© 2016 Phycological Society of America.
| Publié dans: | Journal of phycology. - 1966. - 52(2016), 5 vom: 07. Okt., Seite 888-895 |
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| Auteur principal: | |
| Autres auteurs: | , , , |
| Format: | Article en ligne |
| Langue: | English |
| Publié: |
2016
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| Accès à la collection: | Journal of phycology |
| Sujets: | Journal Article Research Support, Non-U.S. Gov't Cryptic species araphid diatom diatom patches phylogeny surf zone Algal Proteins |
| Résumé: | © 2016 Phycological Society of America. The diatom Asterionellopsis glacialis sensu lato forms high-density patches in the surf zone of some sandy beaches worldwide and was until recently considered a cosmopolitan species. With the recent description of four cryptic species, the identity of specimens found in these accumulations remains uncertain. In this study, diatom patches were sampled from two sandy beaches of the Brazilian coast: one tropical (Futuro Beach, 3° S; 38° W) and one subtropical (Cassino Beach, 32° S; 52° W). Fine structure of frustules and the sequencing of three phylogenetic markers revealed the subtropical strains to be A. guyunusae and the tropical strains to be a new species, here described as Asterionellopsis tropicalis sp. nov. A. tropicalis was differentiated morphologically by the number of striae in 10 μm at the foot pole and head (39-44; 38-45, respectively), from A. lenisilicea (46-55; 46-64), A. maritima (46-51; 46-60), and A. thurstonii (42-58; 55-70). The number of striae at the head region of the valvocopula (10 μm) helped to distinguish A. tropicalis (56-62) from A. guyunusae (61-64), but A. tropicalis was morphologically undistinguishable from A. glacialis. The sequence divergence from other identified Asterionellopsis species was 13%-16% (Cox1), 11%-12% (5.8S + ITS2) and 2%-6% (RbcL), and A. tropicalis formed a distinct monophyletic clade with high support in all analyzed phylogenetic trees (single or multi-locus). This work will aid in the understanding of the ecological and physiological diversity of diatom patches that are key to the trophic webs of sandy beaches |
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| Description: | Date Completed 18.01.2018 Date Revised 18.09.2018 published: Print-Electronic GENBANK: KT351586, KT336328, KT351587, KT336329, KT336325, KT285183, KT336323, KT336326, KT336324, KT343751, KT336327, KF454002, KF453984, KF454003, KF453990, KF453985, GQ330311, KF453991, KF453986, GQ330312, KF453992, KF453981, KF453980, KF453999, KF453987, KF453982, KF454000, KF453988, KF453983, KF454001, KF453989, HQ710592, ASTBR022-13, FJ864272, KF453993, KF768027, KF454004, KF453994 Citation Status MEDLINE |
| ISSN: | 1529-8817 |
| DOI: | 10.1111/jpy.12435 |