Imagem de Cratis kanekoi Hayami & Kase 1993

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Cratis Hedley 1915

skeletal reinforcement

Paleobiology Database
minor ribbing
URI: http://eol.org/schema/terms/minorRibbing

Definição: Repeated, thickened, raised structures on the shell or carapace surface, less than the thickness of the shell/carapace and covering a small area of it. Thickenings can be either radial, comarginal, axial or spiral.

Atribuição: http://paleodb.org/public/tips/ecology_tips.html

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