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Ammodiscus cretaceus
Taxonomy
Ammodiscus cretaceus was named by Reuss (1845) [Original name: Operculina cretacea (Reuss, 1845)]. It is considered to be a form taxon. Its type specimen is Yes, a test, and it is a 3D body fossil. It is the type species of Ammodiscus.
Sister species lacking formal opinion data
Synonymy list
| Year | Name and author |
|---|---|
| 1845 | Ammodiscus cretaceus Reuss p. 35 figs. 64-65 |
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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.
†Ammodiscus cretaceus Reuss 1845
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Diagnosis
| Reference | Diagnosis | |
|---|---|---|
| A. E. Reuss 1845 | This 0.5-1.5 '' large, circular or broadly elliptical species is the O. incerta D'Orb. from the tertiary sands of Baden near Vienna; only it's even thinner. 10-15 very narrow and not very convex spiral passageways narrower and thinner, so that the disc-shaped housing is deepened flat on both sides towards the middle. The mouth is a narrow crescent-shaped transverse gap next to the penultimate turn. The surface of the test is rough. Not often in the planning marl of Luschitz and Priesen. |
Measurements
No measurements are available
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| Source: g = genus, f = family, o = order | |||||
| References: Loeblich and Tappan 1984, Loeblich and Tappan 1988, Kiessling 2004 | |||||
Age range: base of the Early/Lower Cenomanian to the top of the Late/Upper Campanian or 99.60000 to 70.60000 Ma
Collections (7 total)
| Time interval | Ma | Country or state | Original ID and collection number |
|---|---|---|---|
| Early/Lower Cenomanian | United Kingdom (England) | Ammodiscus cretaceus (78586) | |
| Late/Upper Cenomanian | Egypt | Ammodiscus cretaceus (141572) | |
| Middle Cenomanian | United Kingdom (England) | Ammodiscus cretaceus (78587 78588 78592 78593) | |
| Late/Upper Campanian | Canada (British Columbia) | Ammodiscus cretaceus (91076) |