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Chilostomella
Taxonomy
Chilostomella is a genus. It is extant. It was considered unknown by Cushman (1926).
It was assigned to Chilostomellinae by Cushman (1926) and Cushman (1927); to Foraminiferida by Sepkoski (2002); and to Chilostomellidae by Kiessling (2003).
It was assigned to Chilostomellinae by Cushman (1926) and Cushman (1927); to Foraminiferida by Sepkoski (2002); and to Chilostomellidae by Kiessling (2003).
Species
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.
Diagnosis
| Reference | Diagnosis | |
|---|---|---|
| J. A. Cushman 1926 | Test free, composed of a series of chambers in a coil, each chamber making a half coil of 180° and embracing so that but a small part of the base of the preceding chamber is visible from the exterior.; wall smooth, finely perforate, either thin and transparent or thick and opaque; aperture at the inner margin of the ventral face of the chamber, in a semicircle, narrow, often with
a slightly upturned lip. In this genus the aperture is a very narrow, curved slit, at the base of the chamber at the inner margin. In young specimens there is a slight tendency to have a broader aperture corresponding roughly with that in the following genus which is its main characteristic. |
Measurements
No measurements are available
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| Source: o = order | |||||
| Reference: Kiessling 2004 | |||||
Collections (14 total)
| Time interval | Ma | Country or state | Original ID and collection number |
|---|---|---|---|
| Early/Lower Eocene - Middle Eocene | Taiwan (N/A) | C. czizeki (208362 208363 208529) | |
| Bartonian | USA (California) | C. hadleyi (185234 186057) | |
| Bartonian - Priabonian | Canada (British Columbia) | C. sp. (209754) | |
| Priabonian | USA (Oregon) | C. cylinderoides (207874 207875) | |
| Late/Upper Eocene | USA (Washington) | C. oolina (169032) | |
| Rupelian - Chattian | Canada (British Colombia) | C. sp. (58090) | |
| Late/Upper Oligocene | Taiwan (N/A) | C. czizeki (208553) | |
| Otaian | New Zealand | C. oviformis, C. globata (77488) | |
| Otaian - Altonian | New Zealand | C. ovoidea (77489) | |
| Altonian | New Zealand | C. czizecki, C. oviformis, C. ovoidea (77491) |