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Bistrialites bicostatus
Taxonomy
Liroceras bicostatum was named by Gordon (1964). Its type specimen is USNM 119705, a shell, and it is a 3D body fossil. Its type locality is Loc. 1. USGS 14369. Road cut on se side US 65, 0.8 km sw of Peyton Creek Bridge, which is in a Serpukhovian offshore grainstone/shale in the Imo Formation of Arkansas.
It was recombined as Bistrialites bicostatus by Niko and Mapes (2016) and Niko and Mapes (2017).
It was recombined as Bistrialites bicostatus by Niko and Mapes (2016) and Niko and Mapes (2017).
Synonymy list
Year | Name and author |
---|---|
1964 | Liroceras bicostatum Gordon p. 156 figs. Pl 15, figs 1-6; text-fig 27 |
2016 | Bistrialites bicostatus Niko and Mapes p. 16 fig. 8 |
2017 | Bistrialites bicostatus Niko and Mapes p. 179 figs. 2.1-2.5 |
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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.
†Bistrialites bicostatus Gordon 1964
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Diagnosis
No diagnoses are available
Measurements
part | N | mean | minimum | maximum | median | s.d. | |
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shell height | 2 | 12.8 | 10.5 | 15.5 | 13.0 | 3.54 | |
shell diameter | 2 | 32.6 | 28.0 | 38.0 | 33.0 | 7.07 | |
shell inflation | 2 | 10.8 | 9.00 | 13.0 | 11.0 | 2.83 |
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Source: o = order, c = class | |||||
References: Kiessling 2003, Kiessling 2004 |
Age range: base of the Pendleian to the top of the Arnsbergian or 330.90000 to 323.70000 Ma
Collections (18 total)
Time interval | Ma | Country or state | Original ID and collection number |
---|---|---|---|
Pendleian | USA (Arkansas) | Bistrialites bicostatus (175860) Liroceras bicostatum (157822 157823 157985) | |
Serpukhovian | USA (Arkansas) | Liroceras bicostatum (type locality: 5517) | |
Arnsbergian | USA (Arkansas) | Bistrialites bicostatus (185022 185023) Liroceras bicostatum (157867 157948 157986 157987 157989 157990 157991 157999 158001 160560 160564) |