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Didymograptus (Didymograptus) artus
Taxonomy
Didymograptus (Didymograptus) artus was named by Elles and Wood (1901). Its type specimen is SM A17772 and is a 3D body fossil.
It was recombined as Didymograptus artus by Ruedemann (1947).
It was recombined as Didymograptus artus by Ruedemann (1947).
Sister species lacking formal opinion data
Synonymy list
| Year | Name and author |
|---|---|
| 1901 | Didymograptus (Didymograptus) artus Elles and Wood pp. 48-49 figs. fig. 30; pi. 4, figs 6a-d. |
| 1947 | Didymograptus artus Ruedemann pp. 326-327 figs. pl. 54, figs 3-7, 9 [non figs 8, 10]. |
| 1987 | Didymograptus (Didymograptus) artus Fortey and Owens pp. 258 - 259 figs. 112b-d, 113 |
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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.
†Didymograptus (Didymograptus) artus Elles and Wood 1901
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Diagnosis
| Reference | Diagnosis | |
|---|---|---|
| R. A. Fortey and R. M. Owens 1987 | Didymograptus (Didymograptus) with th l 1 dicalycal; sicula slender, l-3-l-6mm long; stipes 0-4-0-6mm wide at th 1, expanding gradually to a width of l-2-l-6mm at about th 20 and almost constant thereafter. Thecal spacing typically dense, 18 in 10 mm distally or more, although specimens with 15-17 per 10 mm may prove to belong in the species. Distal stipe characters: d 40°-55°, cp acute, 30°-45°. |
Measurements
No measurements are available
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| Source: o = order, c = class | |||||
| References: Aberhan et al. 2004, Aberhan 1992 | |||||
Age range: base of the Blackhillsian to the top of the Oretanian or 474.90000 to 459.00000 Ma
Collections (8 total)
| Time interval | Ma | Country or state | Original ID and collection number |
|---|---|---|---|
| Blackhillsian | USA (Nevada) | Didymograptus artus (104556) | |
| Blackhillsian | USA (California) | Didymograptus artus (104272) | |
| Whiterockian | USA (Utah) | Didymograptus artus (298) | |
| Oretanian | Spain (Guadalajara) | Didymograptus artus (194896) | |
| Oretanian | Spain (Salamanca) | Didymograptus artus (21092 198819) | |
| Oretanian | Portugal | Didymograptus artus (21013) | |
| Sarka | Czech Republic | Didymograptus artus (3857) |