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Phenotypic plasticity of colour-patterned Plectodonta (Strophomenida, Brachiopoda) from the Lower Devonian of the Barrandian area (Czech Republic)

Citace:
MERGL, M., NOLČOVÁ, L. Phenotypic plasticity of colour-patterned Plectodonta (Strophomenida, Brachiopoda) from the Lower Devonian of the Barrandian area (Czech Republic). Bulletin of Geosciences, 2016, roč. 91, č. 4, s. 653-660. ISSN: 1214-1119
Druh: ČLÁNEK
Jazyk publikace: eng
Anglický název: Phenotypic plasticity of colour-patterned Plectodonta (Strophomenida, Brachiopoda) from the Lower Devonian of the Barrandian area (Czech Republic)
Rok vydání: 2016
Autoři: Doc. RNDr. Michal Mergl CSc. , Lucie Nolčová
Abstrakt EN: Colour patterned shells of the strophomenide brachiopod Plectodonta mimica (Barrande, 1879) are described. The shells coming from the Kotýs Limestone (Lochkov Formation, Lochkovian) bear equidimensional spots spaced on shell surface in a divaricate pattern, in concentric bands or in combination of both, indicating high phenotypic variability. Coloration has been observed on ventral but rarely also in dorsal valves. Divaricate pattern of spots indicates that origin of spots is likely connected with neurosecretory function of the mantle. Similar origin is suggested for the truncated rugellae arranged in checkerboard pattern that are developed in some strophomenid brachiopods, e.g., Cymostrophia, Gunnarella, Ptychoglyptus, Sowerbyella (Rugosowerbyella). The camouflage function is not suggested for the colouration of Plectodonta because its ventral valve was likely faced downward
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