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![Plate P1. Specimens of Distephanus speculum speculum forma cylindrus n.f. from Holes 747A and 1140A (scale bar = 10 mm). 1a, b. Holotype (Sample 183-1140A-1R-5, 26-27 cm); (a) apical ring in focus, ( Plate P1. Specimens of Distephanus speculum speculum forma cylindrus n.f. from Holes 747A and 1140A (scale bar = 10 mm). 1a, b. Holotype (Sample 183-1140A-1R-5, 26-27 cm); (a) apical ring in focus, (](http://www-odp.tamu.edu/publications/183_SR/011/images/11_p01.gif)
Plate P1. Specimens of Distephanus speculum speculum forma cylindrus n.f. from Holes 747A and 1140A (scale bar = 10 mm). 1a, b. Holotype (Sample 183-1140A-1R-5, 26-27 cm); (a) apical ring in focus, (
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