Rhombocorniculum
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| Rhombocorniculum Temporal range: | |
|---|---|
Scientific classification  | |
| Kingdom: | Animalia |
| Clade: | Panarthropoda |
| Phylum: | †Lobopodia |
| Family: | †Hallucigeniidae |
| Genus: | †Rhombocorniculum Walliser, 1958[2] |
Rhombocorniculum is a species of small shelly fossil comprising twisted ornamented cones. It has been described from the Comley Limestone and elsewhere. R. cancellatum straddles the Atdabanian/Botomian boundary.[1] The structure of its inner layer suggests that its phosphatic fibres formed within a flexible organic matrix.[3]
Three species are recognized — in stratigraphic succession: R. insolutum, R. cancellatum (=R. walliseri), and R. spinosus (=Rushtonites spinosus).[4] Landing (1995) refers R. insolutum to the strictocorniculids, along with Rushtonites.[3] Hinz (1987) considers insolutum to fall within the variability seen in cancellatum.
