From Frustule
| SPECIES Thalassiosira sp 1 |
Bohaty et al (2003)
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Taxonomic Information
Jr. Synonymy:
- Thalassiosira sp. 1 Bohaty et al., 2003, p. 27, pl. P1, fig. 5.
Morphometry:
Species Description:
- Mini Description: Thalassiosira sp. 1 is an intermediate form between T. insigna and T. oliverana. It is characterized by a perforated hyaline central area and the valve diameter is generally smaller than T. insigna. A distinctive process between the hyaline area and valve margin is also present on some specimens.
- Original Name Thalassiosira sp. 1 Bohaty et al., 2003: Thalassiosira sp. 1 is an intermediate form between T. insigna and T. oliverana. It is characterized by a perforated hyaline central area and the valve diameter is generally smaller than T. insigna. A distinctive process between the hyaline area and valve margin is also present on some specimens (Pl. P1, fig. 5). A similar specimen with a perforated hyaline was referred as Cosmiodiscus intersectus (Brün) Jousé by Gersonde and Burckle (1990, p. 780, pl. 4, fig. 13). The Antarctic specimen of "C. intersectus", however, has been put in synonymy with T. oliverana var. sparsa by Harwood and Maruyama (1992). It is possible that "Thalassiosira sp. 1" identified in Hole 1138A is referable to T. oliverana var. sparsa, but a prominent strutted process outside of the central hyaline area has not been previously documented on T. oliverana var. sparsa specimens.
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Additional Remarks
Useful References
- Bohaty, S.M., Wise, S.W., Jr., Duncan, R.A., Moore, C.L., and Wallace, P.J. 2003. Neogene diatom biostratigraphy, tephra stratigraphy, and chronology of ODP Hole 1138A, Kerguelen Plateau. In Frey, F.A., Coffin, M.F., Wallace, P.J., and Quilty, P.G. (Eds.), Proc. ODP, Sci. Results, 183, 1-53 [CD-ROM]. Available from: Ocean Drilling Program, Texas A&M University, College Station TX 77845-9547, USA.
