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Cetopirus
Taxonomy
Cetopirus was named by Ranzani (1817). It is extant.
It was assigned to Coronulidae by McLaughlin et al. (2005), Chan et al. (2021), Collareta et al. (2022).
It was assigned to Coronulidae by McLaughlin et al. (2005), Chan et al. (2021), Collareta et al. (2022).
Species
Species lacking formal opinion data
Synonymy list
| Year | Name and author |
|---|---|
| 1817 | Cetopirus Ranzani |
| 2005 | Cetopirus McLaughlin et al. p. 41 |
| 2021 | Cetopirus Chan et al. |
| 2022 | Cetopirus Collareta et al. |
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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.
Diagnosis
| Reference | Diagnosis | |
|---|---|---|
| A. Collareta et al. 2022 | Body within a depressed, often dome-shaped shell, consisting of six subequal compartments; circumference subcircular in apical view; orifice of the body chamber rounded–hexagonal, not larger than the basal opening; opercular valves present, much smaller than the orifice; sheath short, smooth to somewhat grooved, whose basal edge does not project freely; ala square and thin; com- pound radius moderately to very thick, whose closely spaced, copiously branching sutural septa originate from a main septum running along the outer edge of the radius; external radius rather narrow and transversely striated; paries thin, provided with broad longitudinal ribs having T-shaped terminations ( primary T-shaped flanges) that form a secondary outer lamina; primary T-shaped flanges perforated by longitudinally elongated tubes or tubules; secondary T-shaped flanges present in the form of minute projections that abut from the primary T-shaped flanges; core of the ribs solidly calcified; ribs externally flattened, ornamented by weak transverse growth folds and fine longitudinal striae, lacking transverse interlocking crenulations; apex of the shell presenting four ribs forming three cavities in-between; secondary branching very symmetrical and frequent, occurring near the apex of the shell and resulting in the basal edge of each compartment presenting a tree-like aspect. |
Measurements
No measurements are available
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| Source: c = class | |||||
| Reference: Kiessling 2004 | |||||
Age range: base of the Middle Pleistocene to the top of the Late/Upper Pleistocene or 0.77400 to 0.01170 Ma
Collections (5 total)
| Time interval | Ma | Country or state | Original ID and collection number |
|---|---|---|---|
| Middle Pleistocene | USA (Oregon) | C. polysyrinx (227922 227923) | |
| Middle Pleistocene | South Africa | C. complanatus (115185) | |
| Late/Upper Pleistocene (interglacial) | USA (California) | C. polysyrinx (20645) | |
| Late/Upper Pleistocene | Spain | C. complanatus (122309) |