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Euthacanthus
Taxonomy
Euthacanthus was named by Powrie (1864). It is not extant. It is the type genus of Euthacanthidae. It was considered unknown by Newman et al. (2011).
It was synonymized subjectively with Climatius by Hay (1902).
It was assigned to Diplacanthidae by Jordan (1963); to Climatiidae by Denison (1979); to Climatiiformes by Hanke and Wilson (2004); and to Euthacanthidae by Newman et al. (2011).
It was synonymized subjectively with Climatius by Hay (1902).
It was assigned to Diplacanthidae by Jordan (1963); to Climatiidae by Denison (1979); to Climatiiformes by Hanke and Wilson (2004); and to Euthacanthidae by Newman et al. (2011).
Species
Synonymy list
| Year | Name and author |
|---|---|
| 1864 | Euthacanthus Powrie |
| 1963 | Euthacanthus Jordan p. 591 |
| 1979 | Euthacanthus Denison |
| 2004 | Euthacanthus Hanke and Wilson |
| 2011 | Euthacanthus Newman et al. |
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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.
G. †Euthacanthus Powrie 1864
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†Euthacanthus gracilis Powrie 1870
†Euthacanthus macnicoli Powrie 1864
Diagnosis
| Reference | Diagnosis | |
|---|---|---|
| M. J. Newman et al. 2011 | Medium-sized , slender acanthodian with maximum length to depth ratio 5:1; no dentition; more than 20 narrow brachiostegal rays that do not extend over the whole gill chamber; fin spines thick-walled, relatively slender and straight with smooth grooves; no dermal plates fused to the pectoral fin spines; a pair of plate-like prepectoral spines; 4-6 pairs of prepelvic spines; posterior dorsal fin spine longer than the anterior dorsal fin spine; simple scapulocoracoid with a short robust shaft; scales ornamented with subparallel rounded ridges leading back from the anterior edge of the crown, with a slight convex base. |
Measurements
No measurements are available
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| Source: c = class, subp = subphylum | |||||
| References: Carroll 1988, Aberhan et al. 2004 | |||||
Age range: Lochkovian or 419.62000 to 413.02000 Ma
Collections (5 total)
| Time interval | Ma | Country or state | Original ID and collection number |
|---|---|---|---|
| Lochkovian | United Kingdom (Scotland) | E. macnicoli (155918 195123 238266) | |
| Early/Lower Devonian | United Kingdom (Scotland) | E. gracilis (181898 181899) |