Published June 8, 2023 | Version v1
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Figure 4. A in Paleogene marine bivalves of the deep-water Keasey Formation in Oregon, Part II: The pteriomorphs

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Figure 4. A. Crenella porterensis detail of coarser ribs and rib increase by splitting (yellow arrow) and by intercalation (black arrows) (enlarged from Fig. 3A). B. Crenella washingtonensis detail of finer ribs and rib increase by intercalation (black arrows) (comparable enlargement from Fig. 3D).

Notes

Published as part of Hickman, Carole S., 2023, Paleogene marine bivalves of the deep-water Keasey Formation in Oregon, Part II: The pteriomorphs, pp. 1-51 in PaleoBios 40 (5) on page 8, DOI: 10.5070/P940561331, http://zenodo.org/record/10913477

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