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Sar, E. A.; Sunesen, I.; Hinz, F. (2008). Fine morphology of Coscinodiscus jonesianus and Coscinodiscus commutatus and their transfer to Coscinodiscopsis gen nov. Diatom Research. 23: 401-421.
167725
10.1080/0269249x.2008.9705766 [view]
Sar, E. A.; Sunesen, I.; Hinz, F.
2008
Fine morphology of Coscinodiscus jonesianus and Coscinodiscus commutatus and their transfer to Coscinodiscopsis gen nov.
Diatom Research
23: 401-421
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The present study was devoted to the morphology, taxonomy, and distribution of Coscinodiscus jonesianus (Greville) Ostenfeld and C. cornmutatus Grunow. As far as was determined there were no previous studies of the fine morphology of the latter taxon. Therefore, this analysis presents differences between the taxa and reliable information for biogeographical studies. Planktonic samples were collected between October 1994 and September 2000 at seven stations along the northern coast of Buenos Aires Province. Samples and slides from the Hustedt Collection containing C. commutatus from the North Sea were analyzed and compared with material collected from Buenos Aires coastal waters. Raw and cleaned samples were analyzed using light and scanning electron microscopy. The presence/absence of an irregular ring of mesorimoportulae over the valve surface, and the striation pattern of the valvocopulae were determined as the only striking features that differentiated the taxa. Based on the modem generic limits of Coscinodiscus, C. jonesianus and C cornmutatus differ from other species in the external morphology of micro?rimoportulae and macrorimoportulae. We therefore propose the creation of the new genus Coscinodiscopsis Sar & Sunesen
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Coscinodiscopsis Sar & Sunesen, 2008 (original description)
Coscinodiscopsis commutata (Grunow) E.A.Sar & I.Sunesen, 2008 (new combination reference)
Coscinodiscopsis jonesiana (Greville) E.A.Sar & I.Sunesen, 2008 (original description)
Coscinodiscus commutatus Grunow, 1884 accepted as Coscinodiscopsis commutata (Grunow) E.A.Sar & I.Sunesen, 2008 (source of synonymy)
Coscinodiscus jonesianus (Greville) Ostenfeld, 1915 accepted as Coscinodiscopsis jonesiana (Greville) E.A.Sar & I.Sunesen, 2008 (source of synonymy)
Coscinodiscus jonesianus var. commutatus (Grunow) Hustedt, 1928 accepted as Coscinodiscopsis commutata (Grunow) E.A.Sar & I.Sunesen, 2008 (source of synonymy)
Eupodiscus commutatus Grunow, 1884 (source of synonymy)
Eupodiscus jonesianus Greville, 1862 accepted as Coscinodiscopsis jonesiana (Greville) E.A.Sar & I.Sunesen, 2008 (additional source)
Coscinodiscopsis commutata (Grunow) E.A.Sar & I.Sunesen, 2008 (new combination reference)
Coscinodiscopsis jonesiana (Greville) E.A.Sar & I.Sunesen, 2008 (original description)
Coscinodiscus commutatus Grunow, 1884 accepted as Coscinodiscopsis commutata (Grunow) E.A.Sar & I.Sunesen, 2008 (source of synonymy)
Coscinodiscus jonesianus (Greville) Ostenfeld, 1915 accepted as Coscinodiscopsis jonesiana (Greville) E.A.Sar & I.Sunesen, 2008 (source of synonymy)
Coscinodiscus jonesianus var. commutatus (Grunow) Hustedt, 1928 accepted as Coscinodiscopsis commutata (Grunow) E.A.Sar & I.Sunesen, 2008 (source of synonymy)
Eupodiscus commutatus Grunow, 1884 (source of synonymy)
Eupodiscus jonesianus Greville, 1862 accepted as Coscinodiscopsis jonesiana (Greville) E.A.Sar & I.Sunesen, 2008 (additional source)
