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Rhactorhynchia subtetrahedra
Taxonomy
Rhynchonella subtetrahedra was named by Davidson (1851).
It was recombined as Rhactorhynchia subtetrahedra by Shi and Grant (1993).
It was recombined as Rhactorhynchia subtetrahedra by Shi and Grant (1993).
Sister species lacking formal opinion data
Synonymy list
Year | Name and author |
---|---|
1851 | Rhynchonella subtetrahedra Davidson p. 95 figs. Pl. 16: Fig. 9, 10, ?11, ?12 |
1993 | Rhactorhynchia subtetrahedra Shi and Grant p. 100 figs. 57; Pl. 5: Fig. 10-14, Pl. 6: Fig. 11 |
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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.
†Rhactorhynchia subtetrahedra Davidson 1851
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Diagnosis
No diagnoses are available
Measurements
part | N | mean | minimum | maximum | median | s.d. | |
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height | 5 | 18.3 | 16.9 | 20.0 | 18.0 | 1.40 | |
shell height | 1 | 15.7 | - | - | - | - |
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Source: o = order, c = class, p = phylum, uc = unranked clade | |||||
References: Aberhan et al. 2004, Nesnidal et al. 2013 |
Age range: Humphresianum or 171.60000 to 168.40000 Ma
Collections (7 total)
Time interval | Ma | Country or state | Original ID and collection number |
---|---|---|---|
Humphresianum | Russian Federation | Rhactorhynchia subtetrahedra (162849) | |
Late/Upper Bajocian | Germany | Rhactorhynchia subtetrahedra (159950) | |
Late/Upper Bajocian | United Kingdom | Rhactorhynchia subtetrahedra (159951) | |
Late/Upper Bajocian | United Kingdom (Gloucestershire) | Rhactorhynchia subtetrahedra (159949) | |
Late/Upper Bajocian | United Kingdom (Somerset) | Rhynchonella subtetrahedra (159948) | |
Parkinsoni | United Kingdom (Somerset) | Rhactorhynchia subtetrahedra (159952) | |
Sauzei | Russian Federation | Rhactorhynchia subtetrahedra (162851) |