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5 results for “Centrichnus”
Fig. 1 in Centrichnus eccentricus revisited: A new view on anomiid bivalve bioerosion
Fig. 1. Holotype (MGUH 19742) of Centrichnus eccentricus Bromley and Martinell, 1991, anomiid bivalve attachment trace, from Pleistocene deposits off Palamós, NE Iberian Peninsula, Spain. A. Valve of Arctica islandica bearing the holotype. B. Detail of the holotype; white arrows indicate grooves not included in the original diagnosis, black arrow indicates the main imprint of the byssus.
Fig. 4 in Centrichnus eccentricus revisited: A new view on anomiid bivalve bioerosion
Fig. 4. Statistics and biometry of anomiid bivalve attachment trace C. eccentricus. All records (A), complete traces on belemnites (B–F) from the Lower Maastrichtian, Jasmund (Rügen, Germany). A. Substrate types utilised for attachment. B. Box plot of biometric measurements. C. Size frequency distribution of trace length. D. Number of traces per belemnite. E. Site selectivity on belemnite. F. Trace orientation on belemnite.
Fig. 3 in Centrichnus eccentricus revisited: A new view on anomiid bivalve bioerosion
Fig. 3. Belemnite (MB.W3074) from Lower Maastrichtian, Jasmund (Rügen, Germany), exhibiting dendrinid boring traces with superimposed Centrichnus eccentricus Bromley and Martinell, 1991 anomiid bivalve attachment trace. In the uncoated belemnite, only the dendrinid boring traces are visible (A, colour contrast), with ammonium chloride coating, the C. eccentricus trace is clearly visible (B, relief contrast).
Fig. 2. Sketches illustrating anomiid and trace morphology. A in Centrichnus eccentricus revisited: A new view on anomiid bivalve bioerosion
Fig. 2. Sketches illustrating anomiid and trace morphology. A. Shell exterior of left valve. B. Shell interior of right valve. C. Morphological features and measured dimensions of Centrichnus eccentricus. D. Schematic cross section of a living anomiid attached to the substrate illustrating the position of etching traces (modified after Yamaguchi 1998).
Fig. 7 in Centrichnus eccentricus revisited: A new view on anomiid bivalve bioerosion
Fig. 7. SEM images illustrating details of Centrichnus eccentricus Bromley and Martinell, 1991, anomiid bivalve attachment trace on a belemnite from the Lower Maastrichtian, Jasmund, Rügen, Germany (MB.W3084). A. Complete morphology overview. B. Byssal attachment trace with preserved remains of calcified byssus. Close-up of calcified byssus (C), byssus attachment grooves (D), pits forming the anterior margin (E), posterior marginal groove (F).
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These curated guides explain access requirements, typical timelines, costs, and reuse considerations for widely used research datasets.
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