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Bemella jacutica
Taxonomy
Helcionella jacutica was named by Rozanov and Missarzhevsky (1966) [Missarzhevsky in Rozanov and Missarzhevsky 1966]. Its type specimen is GIN 3470//52, a shell, and it is not a trace fossil. Its type locality is M302/1-2, M42-a; Tiktirikteekh Creek/Rivulet, which is in a Tommotian reef, buildup or bioherm limestone in the Pestrotsvet Formation of the Russian Federation. It is the type species of Bemella.
It was recombined as Securiconus jacuticus by Vasil’yeva (1998); it was recombined as Bemella jacutica by Rozanov et al. (1969), Barskova (1988), Brock and Cooper (1993), Elicki (1994), Elicki (1996), Kouchinsky et al. (2017) and Wagner (2023).
It was recombined as Securiconus jacuticus by Vasil’yeva (1998); it was recombined as Bemella jacutica by Rozanov et al. (1969), Barskova (1988), Brock and Cooper (1993), Elicki (1994), Elicki (1996), Kouchinsky et al. (2017) and Wagner (2023).
Synonymy list
| Year | Name and author |
|---|---|
| 1966 | Helcionella jacutica Rozanov and Missarzhevsky |
| 1969 | Bemella jacutica Rozanov et al. pp. 163-164 figs. pl. 2 f. 4, 10a; pl. 4 f. 3, 14, 20 |
| 1988 | Bemella jacutica Barskova p. 101 |
| 1993 | Bemella jacutica Brock and Cooper p. 778 |
| 1994 | Bemella jacutica Elicki p. 83 figs. f 4/15, 14 |
| 1996 | Bemella jacutica Elicki pp. 153 - 154 figs. txt. f. 6; pl. 6 f. 6-9 |
| 1998 | Securiconus jacuticus Vasil’yeva |
| 2017 | Bemella jacutica Kouchinsky et al. p. 334 |
| 2023 | Bemella jacutica Wagner p. S5521 |
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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.
†Bemella jacutica Rozanov and Missarzhevsky 1966
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Diagnosis
No diagnoses are available
Measurements
No measurements are available
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| Source: g = genus, f = family, c = class | |||||
| References: Hendy 2009, Feng et al. 2000, Hendy et al. 2009 | |||||
Age range: base of the Nemakit-Daldynian to the top of the Lenian or 538.80000 to 510.20000 Ma
Collections (41 total)
| Time interval | Ma | Country or state | Original ID and collection number |
|---|---|---|---|
| Nemakit-Daldynian | Russian Federation (Khabarovsk Krai) | Bemella jacutica (50367) | |
| Nemakit-Daldynian | Russian Federation (Khabarovsk) | Bemella jacutica (99465) | |
| Nemakit-Daldynian - Tommotian | Russian Federation (Sakha) | Bemella jacutica (99229) | |
| Cambrian | China (Yunnan) | Bemella jacutica (201549 201563 201564 201565 201566 201567 201576 201585 201586 201587 201590 201591 201594) | |
| Tommotian | Russian Federation | Bemella jacutica (90089) | |
| Tommotian | Russian Federation (Krasnoyarsk Krai) | Bemella jacutica (50429 96392 96396 233166) | |
| Tommotian | Russian Federation (Krasnoyarsk) | Bemella jacutica (99484) | |
| Tommotian | Russian Federation (Yakutia) | Bemella jacutica (45847 45848 45849 45850 45851 45852 96245) | |
| Tommotian | Russian Federation (Yakutiya) | Bemella jacutica (56858 80796 90088 96226 96391 96394) Helcionella jacutica (type locality: 96251) | |
| Tommotian | Russian Federation (Siberia) | Bemella jacutica (50319 50321) | |
| Tommotian | Russian Federation (Khabarovsk Krai) | Bemella jacutica (50314) | |
| Tommotian | Russian Federation (Sakha) | Bemella jacutica (233169) | |
| Atdabanian - Lenian | Germany (Saxony) | Bemella jacutica (6899) |