Conodont BM1A05

Conodont BN1A05
Sb element of Phragmodus undatus
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-- BN1A05X01
-- BN1A05S02
-- BN1A05S03
BN1A05M04 -- BM1A05M04 BM1A05M05. -- BN1A05M05 BM1A05M06 -- BN1A05M06
-- BN1A05M07
BM1A05M08 -- BN1A05M08

Estimated Age: about 450 million years old.
Comments: Scale Bar is 0.5 mm. Dayton Area, Ordovician Silurian Boundary -- teaching materials courtesy of Jeff Bauer. Sb element of Phragmodus undatus. Lateral costae assymetrically disposed; cusp and element twisted. Photo BN1A05M04 was taken with the big microscope, and shows the cross-section shape of the cusp and costae. The oral costa actually corresponds to point A, and the aboral costa to point B. The same picture was taken again as a mosaic for BN1A05M05, and rotated downward for BN1A05M06 to show the cross section of the large denticle. BN1A05M07 was painted with water color China White. This non-trasparent color did not wsh off completely, and was an unfortunate choice. Depth-of-field distortion ruins stereoscopic image from large microscope where were assembled from mosaic images. BN1A05M08 uses Windsor Blue as color which has the disadvantage of being rather granular and glittery.

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