Watsonella Grabau, 1900
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publication ID |
https://doi.org/ 10.4202/app.00289.2016 |
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persistent identifier |
https://treatment.plazi.org/id/03AD87A8-FFBB-6D07-FF06-FC6D653C86E6 |
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treatment provided by |
Felipe |
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scientific name |
Watsonella Grabau, 1900 |
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Genus Watsonella Grabau, 1900 View in CoL
Type species: Watsonella crosbyi Grabau, 1900 ; Camenella baltica Zone ?, upper part of Cambrian Stage 2–lower part of Cambrian Stage 3, lower Cambrian; boulders at Sandy Cove and Pleasant Beach, Cohasset, Massachusetts, USA.
Remarks.— Watsonella crosbyi was proposed as the oldest known rostroconch (Pojeta and Runnegar 1976; Landing 1988; Landing et al. 1989, 2013; Kouchinsky 1999). Based on morphology and shell microstructure, an alternative interpretation is that Watsonella belongs to an evolutionary lineage of helcionellid molluscs that led to the earliest bivalves (i.e., Pojetaia Jell, 1980 and Fordilla Barrande, 1881 ) rather than to the rostroconchs (Vendrasco et al. 2011a, b).
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