Arhouriella

Arhouriella; Temporal range: Middle Cambrian PreꞒ Ꞓ O S D C P T J K Pg N
Scientific classification
Kingdom:	Animalia
Phylum:	Mollusca
Family:	† Arhouriellidae ; Geyer & Streng 1998
Genus:	† Arhouriella ; Geyer & Streng 1998
Species:	†A. opheodontoides
Binomial name
	†Arhouriella opheodontoides; Geyer & Streng 1998

Last updated November 28, 2025

Arhouriella is arguably the oldest example of a bivalve mollusc in the fossil record. Arguably because there are older contenders to this crown, and because there is not a watertight case that it is a bivalve.^[2] The type and only species, Arhouriella opheodontoides, was named and described by Gerd Geyer & Michael Streng in 1998.^[1]

References

1 2 Geyer, G; Streng, M. (1998). "Middle Cambrian Polycypods frm the Anti-Atlas, Morocco" (PDF). Revista Española de Paleontología (in Spanish): 83–96.
↑ G E Budd; S Jensen (1 May 2000). "A critical reappraisal of the fossil record of the bilaterian phyla". Biological Reviews. 75 (2): 253–295. doi:10.1017/S000632310000548X. ISSN 1464-7931. PMID 10881389. Wikidata Q28139976.

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[GS98-1] 1 2 Geyer, G; Streng, M. (1998). "Middle Cambrian Polycypods frm the Anti-Atlas, Morocco" (PDF). Revista Española de Paleontología (in Spanish): 83–96.

[budd-2] G E Budd; S Jensen (1 May 2000). "A critical reappraisal of the fossil record of the bilaterian phyla". Biological Reviews. 75 (2): 253–295. doi:10.1017/S000632310000548X. ISSN 1464-7931. PMID 10881389. Wikidata Q28139976.

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