Calvapilosa

Calvapilosa
Temporal range: Late Tremadocian,
Scientific classification
Kingdom: Animalia
Phylum: Mollusca
Family: †Siphogonuchitidae
Genus: †Calvapilosa
Vinther et al., 2017
Species:
†C. kroegeri
Binomial name
†Calvapilosa kroegeri
Vinther et al., 2017

Calvapilosa (Hairy Scalp) is an extinct genus of siphogonuchitid stem-aculiferan known from the Early Ordovician Fezouata Formation of Morocco. Its discovery and placement as a stem-aculiferan suggests that the ancestral mollusc bore a single shell rather than being shell-less like aplacophorans or bearing eight metameres like chitons and monoplacophoran soft tissues.

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