Albertoceras
genus of molluscs
Albertoceras is a genus of Early Ordovician ellesmeroceratids with a small, slender, orthoconic to slightly endogastric shell; some even tiny. The cross section is strongly compressed so as to make the height proportionally notably greater than the width. The sutures, marking the edges of the septa, have broad, shallow, lateral lobes. The siphuncle, which seems to lack diaphragms, lies close to the venter.
Albertoceras differs from Ectenolites, which it closely resembles in the early, or juvenile, portion, in having a short living chamber that narrows toward the aperture and a convex dorsal profile in the adult portion. The ventral profile remains straight throughout.
Albertoceras walcotti, the type species, and A. gracillimum are both from the Mons Formation of Alberta. A. staufferi is from the Tanyard Formation of Texas and A. clelandi is from the Tribes Hill Limestone of New York.
References
R.H. Flower, 1964. The Nautiloid Order Ellesmeroceratida (Cephalopoda).
“Albertoceras” enters the record as genus of molluscs. Crown Archives preserves that source wording while asking what Albertoceras, genus and molluscs can confirm, complicate or overturn.
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“Albertoceras” is worth following because a concise public description often conceals a longer documentary argument. Here, Albertoceras, genus and molluscs provides the most credible route into that argument.
Datasets, specimens, observations and peer-reviewed methods provide the appropriate test for the technical claims summarized here. The source revision retrieved here is dated Feb 18, 2026. The linked authority identifier is Q4712256. None of the 0 selected statements returned an explicit reference. The first chronological checks are 1964.
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This entry incorporates text from “Albertoceras” on English Wikipedia. Contributors are listed in the page history. Text is available under the Creative Commons Attribution-ShareAlike 4.0 License. Selected authority identifiers and statements are retrieved from Wikidata under CC0; their references and qualifiers remain part of the verification path.