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Crittendenia decidens
Taxonomy
Pseudomonotis decidens was named by Bittner (1899).
It was recombined as Claraia decidens by Nakazawa (1953), Nakazawa (1981); it was recombined as Crittendenia decidens by Newell and Boyd (1995).
It was recombined as Claraia decidens by Nakazawa (1953), Nakazawa (1981); it was recombined as Crittendenia decidens by Newell and Boyd (1995).
Sister species lacking formal opinion data
Synonymy list
| Year | Name and author |
|---|---|
| 1899 | Pseudomonotis decidens Bittner |
| 1953 | Claraia decidens Nakazawa p. 265 figs. Pl 3, figs 8,9 |
| 1981 | Claraia decidens Nakazawa p. 109 figs. Pl 11, figs 9-13 |
| 1995 | Crittendenia decidens Newell and Boyd p. 52 fig. 39 |
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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.
†Crittendenia decidens Bittner 1899
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Diagnosis
No diagnoses are available
Measurements
| part | N | mean | minimum | maximum | median | s.d. | |
|---|---|---|---|---|---|---|---|
| valve height | 4 | 19.4 | 7.57 | 27.9 | 25.9 | 9.58 |
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| Source: o = order, c = class | |||||
| References: Kiessling 2004, Aberhan et al. 2004 | |||||
Age range: base of the Griesbachian to the top of the Anisian or 251.90200 to 241.46400 Ma
Collections (12 total)
| Time interval | Ma | Country or state | Original ID and collection number |
|---|---|---|---|
| Griesbachian | China (Anhui) | Claraia decidens (149194) | |
| Griesbachian | China (Sichuan) | Claraia decidens (98559 149109) | |
| Griesbachian | China (Guizhou) | Claraia decidens (108560) | |
| Induan - Olenekian | Japan (Fukui) | Claraia decidens (39973) | |
| Dienerian | Pakistan | Crittendenia decidens (115800) | |
| Smithian | India (Kashmir) | Claraia decidens (115381) | |
| Olenekian | Japan | Claraia decidens (115245) | |
| Spathian | Kazakhstan (Mangyshlak) | Claraia decidens (203161) | |
| Spathian | Romania | Crittendenia decidens (161080) | |
| Anisian | Russian Federation (Primorye) | Claraia decidens (46900 46901) |