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Figure 1 | BMC Evolutionary Biology

Figure 1

From: Competition and mimicry: the curious case of chaetae in brachiopods from the middle Cambrian Burgess Shale

Figure 1

Micromitra burgessensis from the middle (Series 3, Stage 5) Cambrian Burgess Shale. A-D, ROM63169, RQ + 8.2 m. A-B, Plan view of specimen attached to Tubulella; C-D, Close up anteromedial and posterolateral chaetae, scale bar 1 mm. E, ROM63170, RQ + 8.2 m, Plan view of specimens attached to Tubulella, scale bar 10 mm. F, USNM 59801a, Walcott Quarry, Phyllopod Bed, Plan view of Acrothyra and Micromitra attached to Pirania. G-H, ROM57839.30-33, BW-150 cm. G, Plan view of Nisusia and Micromitra attached to Pirania, scale bar 10 mm. H, Close up of specimens attached to Pirania, scale bar 10 mm. I, ROM63171, RQ + 11.4 m, Plan view of a cluster of Micromitra specimens, scale bar 10 mm. J, ROM56248, BW-100 cm, Plan view of Micromitra, Nisusia and Acrothyra attached to Pirania, scale bar 10 mm. K-M, USNM 59801a, Walcott Quarry, Phyllopod Bed. K, Plan view. L, Close up of posterolateral chaetae, scale bar 1 mm. M, Close up of anteromedial chaetae, scale bar 1 mm. N, ROM63172, BW-210 cm, Micromitra with swept chaetae. O, ROM63173, BW-210 cm, juvenile Micromitra specimen, scale bar 1 mm. P-Q, ROM63174, BW-235 cm. P, Plan view; Q, Close up of chaetae beneath shell, scale bar 1 mm. Scale bars 5 mm unless otherwise stated.

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