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Cornulina (Afrocornulina)
Taxonomy
Cornulina (Afrocornulina) was named by Adegoke (1977) [Sepkoski's age data: T Than Sepkoski's reference number: ZR77].
It was reranked as Afrocornulina by Sepkoski (2002).
It was assigned to Cornulina by Adegoke (1977); and to Neotaenioglossa by Sepkoski (2002).
It was reranked as Afrocornulina by Sepkoski (2002).
It was assigned to Cornulina by Adegoke (1977); and to Neotaenioglossa by Sepkoski (2002).
Species lacking formal opinion data
Synonymy list
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If no rank is listed, the taxon is considered an unranked clade in modern classifications. Ranks may be repeated or presented in the wrong order because authors working on different parts of the classification may disagree about how to rank taxa.
Subg. †Cornulina (Afrocornulina) Adegoke 1977
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†Cornulina (Afrocornulina) africana Adegoke 1977
Diagnosis
Reference | Diagnosis | |
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O. S. Adegoke 1977 | Medium-sized, Cornulina-like shell, with short, acute spire, ornamented by short spines which are wel1 developed near the adapical and abapical ends of whorls and suppressed in between. Body whorl long, ornamented by a crown of nodes located a considerable distance below suture. Spine bases prolonged as broad ridges on the body whorl. Columella heavy and cylindrical, sharply bent abaperturally below body whorl and its tip is twisted and recurved toward the outer lip. Siphonal fasciole well developed, canal narrow and crescentic. Columella and part of parietal surface covered by callus.
Sculpture consists of a series of narrow, wavy spiral ribs separated by wide interspaces. Ribs few and faint on adapical portion of body whorl above the row of nodes. |