Smithsonian National Museum of Natural History

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Bysmatrum subsalsum

Bysmatrum subsalsum holotype plate

Figs 1-7. Lateral view of a cell with reticulated thecal surface, a conical epitheca, wide and deep, displaced cingulum, and a trapezoid hypotheca. The apical pore complex is situated ventrally. The apical plate 1' is asymmetric and pentagonal. The hypotheca is ventrally indented forming two lobes separating plates 2'" and 5'". The cingulum is displaced and finely striated with small pores aligned along the cingular lists. Fig. 2.The apical pore complex is a recessed chamber with a centrally located raised dome surrounded by a collar; it includes the apical pore plate (PO) and canal plate (X). Fig.3. Lateral view of a cell: a conical epitheca, wide and deep cingulum, and trapezoid hypotheca. Fig.4. Architecture of the epitheca including the position of the apical pore complex. Intercalary plates 2a and 3a are separated by plate 3'. The intercalary bands are striated.

Reference: Faust, M.A. and K.A. Steidingerae.1998. Bysmatrum gen. nov. (Dinophyceae) and three new combinations for a benthic scrippsielloid species. Phycologia 37: 47-52; and Faust, M.A. 1996. Morphology and ecology of the marine benthic dinoflagellate, Scrippsiella subsalsa (Dinophyceae). Journal of Phycology 32: 669-675.

EMu: Holotype SEM negative # 23040; SEM stub # ?; Field # 78-87; Accession # 407159; Catalog #1730; Figure # 1.



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