Stephanodiscus neoaegypticus Flower 2013, sp. nov
| Autor: | Flower, R. J., Keatings, K., Hamdan, M. A., Hassan, F. A. |
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| Rok vydání: | 2013 |
| Předmět: | |
| DOI: | 10.5281/zenodo.5085497 |
| Popis: | Stephanodiscus neoaegypticus Flower sp. nov. Cells circular, undulate, central areas weakly concave or convex, spines absent. Cell diameters c. 30���70 ��m. Fascicles radial, uniseriate striae occupy about 2/3 of the valve radius with 3���4 rows of areolae at valve face-mantle junction. Interfascicles distinct, not raised (compared to fascicles), circa 1.5 ��m wide around the mid radius, 4���5 areolae in 10 ��m at valve margin. External areolar openings small (1 ��m or less). Central area fultoportulae up to 6, near valve centre, with two satellite pores. Marginal fultoportulae with three satellite pores at termini of interfascicles. External openings of marginal fultoportulae slightly raised. Rimoportulae sub-marginal, 3���6, oblique, irregularly spaced. Type:��� EGYPT. Gharak: Faiyum Depression, 29.43447�� N, 30.64213�� E, Holocene lake sediment core (GARK1) material, sediment depth 450 cm, collected April���May 2008, (Circled specimen (Fig. 3) on slide BM 101659 (BM!), holotype, designated here). Published as part of Flower, R. J., Keatings, K., Hamdan, M. A. & Hassan, F. A., 2013, Stephanodiscus Ehr. species from Holocene sediments in the Faiyum Depression (Middle Egypt), pp. 66-80 in Phytotaxa 127 (1) on page 72, DOI: 10.11646/phytotaxa.127.1.10, http://zenodo.org/record/5085493 |
| Databáze: | OpenAIRE |
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