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Observations on the morphological diversity and distribution of two siliceous nannoplankton genera, Hyalolithus and Petasaria
Yamagata Univ, Fac Sci, Dept Earth & Environm Sci, Yamagata 9908560, Japan.
Yamagata Univ, Grad Sch Sci & Engn, Yamagata 9908560, Japan.
Florida State Univ, Earth Ocean & Atmospher Sci, Tallahassee, FL 32306 USA.
Univ Tasmania, Inst Marine & Antarctic Studies, Hobart, Tas 7001, Australia.
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2015 (English)In: Micropaleontology, ISSN 0026-2803, E-ISSN 1937-2795, Vol. 61, no 6, 439-455 p.Article in journal, Meeting abstract (Refereed) Published
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Abstract [en]

Scale-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 the world. 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, Å upraha, Thomsen et Young sp. nov.

Place, publisher, year, edition, pages
2015. Vol. 61, no 6, 439-455 p.
National Category
Biological Systematics Other Earth and Related Environmental Sciences
Identifiers
URN: urn:nbn:se:uu:diva-288902ISI: 000374703600004OAI: oai:DiVA.org:uu-288902DiVA: diva2:924419
Conference
INA Workshop on Extant Coccolithophores Research (Coccolithophores), OCT 05-10, 2014, Hellen Ctr Marine Res, Crete, GREECE
Available from: 2016-04-28 Created: 2016-04-28 Last updated: 2016-12-06Bibliographically approved

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