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Lytvolasma
Taxonomy
Lytvolasma was named by Soshkina (1925) [Sepkoski's age data: P Asse-l P Djhu Sepkoski's reference number: 893]. It is not extant.
It was assigned to Hapsiphyllidae by Hill (1956); to Antiphyllinae by Hill (1981), Fedorowski and Bamber (2001); and to Rugosa by Sepkoski (2002).
It was assigned to Hapsiphyllidae by Hill (1956); to Antiphyllinae by Hill (1981), Fedorowski and Bamber (2001); and to Rugosa by Sepkoski (2002).
Species
Species lacking formal opinion data
Synonyms
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Synonymy list
| Year | Name and author |
|---|---|
| 1925 | Lytvolasma Soshkina |
| 1940 | Lytvelasma Lang et al. |
| 1956 | Lytvolasma Hill |
| 1981 | Lytvolasma Hill |
| 2001 | Lytvolasma Fedorowski and Bamber p. 47 |
| 2002 | Lytvolasma Sepkoski |
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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.
G. †Lytvolasma Soshkina 1925
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†Lytvolasma asymetricum Soshkina 1941
†Lytvolasma aucta Fedorowski 1987
†Lytvolasma canadense Fedorowski and Bamber 2001
†Lytvolasma ellipticum Wu 1975
†Lytvolasma insolitum He and Weng 1983
†Lytvolasma lhazeense Lin 1984
Invalid names: Lytvelasma Lang et al. 1940 [synonym]
Diagnosis
No diagnoses are available
Measurements
No measurements are available
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| Source: o = order, c = class | |||||
| Reference: Kiessling 2004 | |||||
Age range: base of the Kasimovian to the top of the Changhsingian or 307.00000 to 251.90200 Ma
Collections (17 total)
| Time interval | Ma | Country or state | Original ID and collection number |
|---|---|---|---|
| Kasimovian | Egypt | L. aucta (50124) | |
| Gzhelian | USA (Texas) | L. aucta (43483) | |
| Artinskian | China (Xizang) | L. insolitum (81861) | |
| Artinskian | Svalbard and Jan Mayen | Lytvelasma geinitzii, Lytvelasma nordenskioldi (212504) | |
| Artinskian | Canada (British Columbia) | L. hongi (107934) | |
| Saraninian | Russian Federation | L. sp. (75624) | |
| Kungurian | USA (Texas) | L. sp. (75864) | |
| Roadian | China (Heilongjiang) | L. asymetricum (109615) | |
| Wordian | China (Jilin) | L. ellipticum (95598) | |
| Wordian - Capitanian | China (Xizang) | L. ellipticum (131044) L. lhazeense (131050) | |
| Wordian - Capitanian | China (Nei Mongol) | L. ellipticum (109610) | |
| Capitanian | Canada (Nunavut) | L. canadense (107836) | |
| Capitanian | China (Qinghai) | L. asymetricum (95976) | |
| Wuchiapingian | China (Xizang) | L. ellipticum (110537) | |
| Wuchiapingian | Canada (Nunavut) | L. canadense (107838) | |
| Changhsingian | China (Xizang) | L. asymetricum (110495) |