Basic info | Taxonomic history | Classification | Included Taxa |
Morphology | Ecology and taphonomy | External Literature Search | Age range and collections |
Helmersenia
Taxonomy
Helmersenia was named by Pander (1861). It is not extant.
It was assigned to Acanthamboniinae by Popov and Nolvak (1987) and Holmer (1989); to Siphonotretidae by Williams et al. (2000); and to Acrotretida by Sepkoski (2002).
It was assigned to Acanthamboniinae by Popov and Nolvak (1987) and Holmer (1989); to Siphonotretidae by Williams et al. (2000); and to Acrotretida by Sepkoski (2002).
Synonymy list
Year | Name and author |
---|---|
1861 | Helmersenia Pander |
1987 | Helmersenia Popov and Nolvak |
1989 | Helmersenia Holmer |
2000 | Helmersenia Williams et al. p. 143 |
2002 | Helmersenia Sepkoski |
Is something missing? Join the Paleobiology Database and enter the data
|
|
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. †Helmersenia Pander 1861
show all | hide all
Diagnosis
No diagnoses are available
Measurements
No measurements are available
|
|
||||
|
|
||||
|
|||||
|
|
||||
|
|
||||
Source: c = class, p = phylum, uc = unranked clade | |||||
References: Aberhan et al. 2004, Nesnidal et al. 2013 |
Age range: base of the Batyrbaian to the top of the Pirgu or 491.50000 to 445.20000 Ma
Collections (9 total)
Time interval | Ma | Country or state | Original ID and collection number |
---|---|---|---|
Furongian | Estonia (Lääne) | H. ladogensis (196615) | |
Batyrbaian - Early/Lower Ordovician | Russian Federation (Leningrad region) | H. ladogensis (235436) | |
Pakerort | Estonia (Hiuu) | H. ladogensis (196611 196613) | |
Pakerort | Russian Federation (Pskov Oblast) | H. ladogensis (235886) | |
Pakerort | Estonia (Lääne-Viru) | H. ladogensis (196616) | |
Katian | Russian Federation (Siberia) | H. sp. (9311) | |
Katian - Pirgu | Russian Federation (Krasnoyarsk) | H. rotundata (204687) | |
Rawtheyan - Cautleyan | Russian Federation (Siberia) | H. sp. (9313) |