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Sonninia (Alaskinia)
Taxonomy
Sonninia (Alaskinia) was named by Westermann (1978).
It was assigned to Sonninia by Westermann (1978), Howarth (2013).
It was assigned to Sonninia by Westermann (1978), Howarth (2013).
Synonyms
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Synonymy list
| Year | Name and author |
|---|---|
| 1969 | Sonninia (Alaskoceras) Westermann p. 102 |
| 1978 | Sonninia (Alaskinia) Westermann |
| 2013 | Sonninia (Alaskinia) Howarth p. 117 |
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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. †Sonninia (Alaskinia) Westermann 1978
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Invalid names: Sonninia (Alaskoceras) Westermann 1969 [replaced]
Diagnosis
No diagnoses are available
Measurements
| part | N | mean | minimum | maximum | median | s.d. | |
|---|---|---|---|---|---|---|---|
| shell height | 4 | 17.1 | 10.4 | 23.8 | 18.6 | 5.55 | |
| shell diameter | 4 | 55.1 | 30.0 | 88.0 | 59.0 | 23.7 | |
| shell inflation | 4 | 25.7 | 12.6 | 44.0 | 28.1 | 12.9 |
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| Source: o = order, c = class | |||||
| References: Kiessling 2004, Kiessling 2003 | |||||
Age range: Early/Lower Bajocian or 170.90000 to 168.60000 Ma
Collections (6 total)
| Time interval | Ma | Country or state | Original ID and collection number |
|---|---|---|---|
| Early/Lower Bajocian | USA (Alaska) | Sonninia alaskensis (175614 175648 175650 175651 175652 175664) |