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Tropidosiphonus lanceolatus S. Komura 1994, p. 5; fig. 4-4, 4-5, 4-6, 6-1, 6-2, 6-3, 6-4
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| Status | Invalid? | |
| Published in | Komura, S. 1994 [ref. 007067]. Observations on the diatom Mediaria Sheshukova-Poretzkaja and new forms of similar appearance with a new type of raphe system. Diatom. The Japanese Journal of Diatomology 9:1-16. |
| Type | Holotype: Km-5901 (22) = 16.1 x 146.0 (Fm 37592), Fig. 4-5 | INA card not found. Click here to check this name in the INA website. |
| Type Locality | Km-5901: 140º 5’ 44” E, 35º 4’ 15” N, at the Route 128 running along the Pacific coast between Futomi and Emi, southeast corner of the Boso Peninsula; a calcareous nodule from the Nabuto Formation exposed on a tidal flat (early Miocene) | Language of description | L, E |
| Collector | | Assessment of record accuracy | likely accurate |