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Streptacis
Taxonomy
Streptacis was named by Meek (1871) [Sepkoski's age data: D Give P Dora Sepkoski's reference number: 797,1130]. It is not extant. It is the type genus of Streptacidoidea.
It was assigned to Heterostrophia by Sepkoski (2002); and to Streptacididae by Knight (1931), Knight et al. (1960), Bandel (2002), Mazaev (2015), Nützel and Ketwetsuriya (2016) and Ketwetsuriya et al. (2020).
It was assigned to Heterostrophia by Sepkoski (2002); and to Streptacididae by Knight (1931), Knight et al. (1960), Bandel (2002), Mazaev (2015), Nützel and Ketwetsuriya (2016) and Ketwetsuriya et al. (2020).
Synonymy list
Year | Name and author |
---|---|
1871 | Streptacis Meek p. 173 |
1931 | Streptacis Knight |
1960 | Streptacis Knight et al. p. 322 |
2002 | Streptacis Bandel p. 49 |
2002 | Streptacis Sepkoski |
2015 | Streptacis Mazaev p. 981 |
2016 | Streptacis Nützel and Ketwetsuriya p. 509 |
2020 | Streptacis Ketwetsuriya et al. p. 72 |
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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. †Streptacis Meek 1871
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†Streptacis complanata Hoare et al. 1997
†Streptacis fragilis Pan and Erwin 2002
†Streptacis inflata Erwin 1988
†Streptacis ingens Hoare et al. 1997
†Streptacis khaokhadensis Ketwetsuriya et al. 2020
†Streptacis meeki Knight 1931
†Streptacis nalivkini Mazaev 2019
†Streptacis orientalis Nützel and Nakazawa 2012
†Streptacis permiana Beede 1907
†Streptacis piercei Erwin 1988
†Streptacis pravis Pan and Erwin 2002
†Streptacis regularis Pan and Erwin 2002
†Streptacis scalpta Knight 1931
†Streptacis subgracilis Netschajew 1894
†Streptacis volgenesis Mazaev 2020
†Streptacis whitfieldi Meek 1871
Diagnosis
No diagnoses are available
Measurements
part | N | mean | minimum | maximum | median | s.d. | |
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shell height | 28 | 4.53 | 0.910 | 15.9 | 4.70 | 4.54 | |
shell diameter | 28 | 1.05 | 0.683 | 1.50 | 1.10 | 0.296 |
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Source: c = class | |||||
Reference: Kiessling 2004 |
Age range: base of the Visean to the top of the Middle Campanian or 346.70000 to 70.60000 Ma
Collections (49 total)
Time interval | Ma | Country or state | Original ID and collection number |
---|---|---|---|
Visean | Australia (New South Wales) | S. sp. (44144) | |
Morrowan | USA (Texas) | S. whitfieldi (79966) | |
Moscovian | USA (Missouri) | S. meeki, S. scalpta, S. whitfieldi (69773) | |
Westphalian B | Germany | S. sp. (50127) | |
Kashirian - Myachkovian | USA (New mexico) | S. scalpta (46548) | |
Desmoinesian | USA (Texas) | S. n. sp. (11100) | |
Desmoinesian | USA (New Mexico) | S. sp., S. whitfieldi (46536) | |
Kasimovian | Japan (Gifu) | S. sp. A, S. sp. B, S. sp. C (217899) | |
Asselian | Russian Federation (Bashkortostan) | S. nalivkini (220900) | |
Permian | USA (Alaska) | Loxonema subgracilis (112199) | |
Sakmarian | Russian Federation | S. volgenesis (205219) | |
Artinskian | USA (Nevada) | S. sp. (66104) | |
Artinskian | USA (Texas) | S. inflata (101772 101773) | |
Kungurian | USA (Texas) | S. piercei (81949) | |
Kungurian | Malaysia (Perak) | S. sp. (62131) | |
Roadian | Russian Federation (Kirov) | S. sp. 1, S. subgracilis (126335) | |
Roadian | Russian Federation (Samara) | S. subgracilis (170192) | |
Roadian | Thailand | S. khaokhadensis (103565) | |
Roadian | Russian Federation | S. sp. 2 (198772) | |
Roadian | Russian Federation (Tatarstan) | S. subgracilis (174705 174706) | |
Wordian | Thailand | S. sp. (181783) | |
Wordian | Thailand (Ratchaburi) | S. sp. (40954) | |
Capitanian | Japan | S. sp., S. orientalis (109667) | |
Capitanian | USA (Texas) | Loxonema permiana (136220) S. permiana (97264 116644 116650 116651) | |
Wuchiapingian | Greece | S. sp. (64171 64172 64173 64174 64175) | |
Wuchiapingian | China (Guangxi) | S. sp. (50022 50023 50025 50026 50027) | |
Changhsingian | China (Yunnan) | S. pravis (56943) | |
Changhsingian | China (Guangxi) | S. regularis, S. fragilis (56895) | |
Changhsingian | China (Jiangxi) | S. sp. (60523) | |
Changhsingian | USA (Texas) | S. permiana (50003 50017 50021) | |
Griesbachian | China (Jiangxi) | S. sp. (60525 60526) | |
Early/Lower Campanian - Middle Campanian | USA (Mississippi) | S. bogradi (7456) |