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Tropidosiphonus secundus S. Komura 1994, p. 6; fig. 4-7, 4-8, 4-9, 7-1, 7-2, 7-3, 7-4, 7-5, 7-6, 7-7
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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 (2) = 4.8 x 144.4 (Fm 37416), Fig. 4-7 | 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 | Language of description | L, E |
| Collector | | Assessment of record accuracy | likely accurate |