Mobergella Temporal range:
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Scientific classification
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Domain: | Eukaryota |
Kingdom: | Animalia |
Phylum: | incertae sedis |
Family: | † Mobergellidae |
Genus: | †
Mobergella Moberg, 1892 |
Species | |
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Mobergella is a millimetric Lower Cambrian shelly fossil of unknown affinity, usually preserved in phosphate and particularly well known from Swedish strata, where it is diagnostic of lowermost Cambrian rocks. [1] Originally interpreted as a monoplacophoran, [1] the circular, cap-shaped shell resembles a hyolith operculum, with concentric rings on its upper surface, and seven pairs of internal muscle scars. It is never found in association with a conch, and its affinity therefore remains undetermined. [2] Nevertheless, its heavy musculature does seem to indicate that it functioned as an operculum. [3]
Some specimens bear evidence of healed injuries. [1]
It's also been compared to the Kirengellids, which are probably brachiopods. [4]
The genus is unique to Lower Cambrian strata and has been found throughout the northern hemisphere. [5]