Journal article
Observations on the morphological diversity and distribution of two siliceous nannoplankton genera, Hyalolithus and Petasaria
Yamagata University1
National Centre for Polar and Ocean Research2
Uppsala University3
National Institute of Aquatic Resources, Technical University of Denmark4
Institute Management, National Institute of Aquatic Resources, Technical University of Denmark5
National and Kapodistrian University of Athens6
University College London7
Florida State University8
University of Tasmania9
University of Bremen10
Kochi University11
University of Bergen12
Universidad Nacional Autónoma de México13
University of Milan - Bicocca14
Nara University of Education15
...and 5 moreScale-bearing siliceous nannoplankton are occasionally encountered in surface seawater samples, but are rarely identified or illustrated. In this study, the morphological diversity of the haptophyte Hyalolithus neolepis and the enigmatic Petasaria heterolepis are investigated in scanning and transmission electron microscopes using materials from around theworld.
Results show that H. neolepis scales exhibit variation in the width of the marginal hyaline area, but intermediate specimens make separation of the two morphologies difficult. Petasaria heterolepis scales also show differences, in the presence of tubercle rows in the hyaline area and degree of hyaline areal coverage, but separation into discrete varieties is difficult at present.
However, specimens with scales bearing a protuberance are considered to be distinct enough to warrant the erection of a new species, Petasaria protuberans Jordan,Malinverno, Šupraha, Thomsen et Young sp. nov.
Language: | English |
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Publisher: | The Micropaleontology Project, Inc. |
Year: | 2016 |
Pages: | 439-455 |
ISSN: | 19372795 and 00262803 |
Types: | Journal article |
DOI: | 10.47894/mpal.61.6.04 |
ORCIDs: | Thomsen, Helge Abildhauge |