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Derbyia crassa
Taxonomy
Orthisina crassa was named by Meek and Hayden (1858). It is not a trace fossil.
It was recombined as Derbya crassa by Girty (1915); it was recombined as Derbyia crassa by Tschernyschew (1902), Hoare (1961), Mudge et al. (1962) and Shintani (2011).
It was recombined as Derbya crassa by Girty (1915); it was recombined as Derbyia crassa by Tschernyschew (1902), Hoare (1961), Mudge et al. (1962) and Shintani (2011).
Subspecies
Sister species lacking formal opinion data
Synonyms
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Synonymy list
| Year | Name and author |
|---|---|
| 1858 | Orthisina crassa Meek and Hayden p. 261 |
| 1858 | Orthisina umbraculum Swallow |
| 1902 | Derbyia crassa Tschernyschew p. 209 figs. Pl 26, figs 1,2 |
| 1915 | Derbya crassa Girty p. 54–58 figs. pl. 6 f. 1a-c |
| 1961 | Derbyia crassa Hoare p. 27–28 figs. pl. 1 f. 17–23 |
| 1962 | Derbyia crassa Mudge et al. p. 78 figs. Pl 13, fig 9 |
| 2011 | Derbyia crassa Shintani p. 81 figs. 4.4a-4.8b, 5.1a-5.3 |
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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.
†Derbyia crassa Meek and Hayden 1858
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†Orthisina umbraculum multistriata Meek and Hayden 1859
Invalid names: Orthisina umbraculum Swallow 1858 [synonym]
Diagnosis
No diagnoses are available