Diatoma tenue var. pachycephala Grun. 1881

                                                                                                                    
Length: 112.5

Width: 2.5

Costae: 9

Striae:































Collection 1223

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Grunon in : Van Heurck, Syn. Diat. Belgique, pl. 50, fig. 15. 1881 (Stoermer and Yang 1969).



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