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Peel, J. S. (1991). "Functional
Morphology of the Class Helcionelloida Nov., and the Early Evolution of the Mollusca". In Simonetta, A. M.; Conway Morris, S (eds.).
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is a genus of rostroconch mollusc with a pegma, once interpreted as an intermediate between helcionellids (such as
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The Early
Evolution of Metazoa and the Significance of Problematic Taxa
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A manual of the
Mollusca: being a treatise on recent and fossil shells
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279:. Cambridge University Press. pp. 157–177.
258:Woodward, Samuel Peckworth; Tate, Ralph (1868).
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235:) and primitive scaphopods (such as
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480:Fossils of the Czech Republic
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475:Prehistoric mollusc genera
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505:Prehistoric mollusc stubs
495:Paleozoic life of Alberta
490:Paleozoic life of Ontario
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110:Scientific classification
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16:Extinct genus of molluscs
500:Paleozoic life of Quebec
19:Not to be confused with
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39:Mid Cambrian–Silurian
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232:Latouchella
173:Ribeirioida
469:Categories
245:References
238:Pinnocaris
226:Anabarella
206:R. junior
133:Kingdom:
127:Eukaryota
21:Ribeiroia
326:Q7322303
320:Wikidata
311:Ribeiria
220:Ribeiria
198:Species
187:Ribeiria
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137:Animalia
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32:Ribeiria
422:mollusc
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