Anabarella

Anabarella is a species of bilaterally-flattened monoplacophoran mollusc,^[2] with a morphological similarity to the rostroconchs.^[3] Its shell preserves evidence of three mineralogical textures on its outer surface: it is polygonal near the crest of the shell, subsequently changing to both spiny and stepwise.^[3] Its internal microstructure is calcitic and semi-nacreous.^[4] Its name reflects its provenance from Anabar, Siberia.^[3] It has been interpreted as ancestral to the rostroconchs,^[5] and has been aligned to the Helcionellidae.^[2]

Anabarella Temporal range: Lower Cambrian PreꞒ Ꞓ O S D C P T J K Pg N
Scientific classification
Domain:	Eukaryota
Kingdom:	Animalia
Phylum:	Mollusca
Class:	†Helcionelloida
Order:	†Helcionelliformes
Family:	†Helcionellidae
Genus:	†Anabarella
Species
A. plana Vostokova, 1962 A. australis
Synonyms
Planutenia [1]

The genus is closely related to Watsonella, with which it bears many morphological similarities,^[3] including a laminar internal shell microstructure said to connect it with the early bivalves Fordilla and Pojetaia.^[6]