Life » … » Metazoa » … » Lonkerojalkaiset » … » Spiriferidae » …

Life » Cellular » Aitotumaiset » Opisthokonta » Metazoa » Kaksikylkiset » Alkusuiset » Spiralia » Lonkerojalkaiset » Rhynchonellata » Spiriferida » Spiriferacea » Spiriferidae » Spirifer «

Spirifer holodnensis Chernyak 1963

skeletal reinforcement

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

Määritelmä: 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.

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

näytä kaikki esiintymät