Fig. 2: Colonies of three Ordovician black coral species of the Sterictopathidae fam. nov. | Communications Biology

Fig. 2: Colonies of three Ordovician black coral species of the Sterictopathidae fam. nov.

From: Unveiling the early evolution of black corals

Fig. 2

a–f Sterictopathes radicatus Baliński & Sun, 2017, Early Ordovician, Fenxiang Formation, Huanghua quarry, Hubei, China. g–n Sterictopathes seira sp. nov., Middle Ordovician, Xiliangsi Formations, Fanjiagou section, Ningqiang, Shaanxi, China. o–t Sterictopathes sp., Middle Ordovician, Xiliangsi Formations, Fanjiagou section, Ningqiang, Shaanxi, China. d, l, r Networks formed by complete and incomplete ridges. e, m, s Complete and incomplete ridges. f, n, t Multi-layered concentric structure of broken tips of branches. The arrows in (a, i) indicate junctions comprised by two (blue arrows), three (red arrows), or four (orange arrows) ridges that assembled at the base of different spines, respectively. CR, complete ridge, IR incomplete ridge, MC multi-layered concentrical structure, PP polyp pit, sb secondary branch, SP spine. Specimens: a, c–e ELI-HHC017, b, f ELI-HHC051, g ELI-FJG03118, h, k, l, n ELI-FJG01001 (holotype), i ELI-FJG03595, j, m ELI-FJG03113, o, q, r ELI-FJG02426. p, s, t ELI-FJG04013. Scale bars: a–c, h–k, o–q = 500 μm; d, e, l, m, r, s = 200 μm; f, n, t = 30 μm.

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