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Arcticacanthus
Taxonomy
Arctiacanthus was named by Valiukevicius (2003). Its type is Arcticacanthus bicostatus.
It was corrected as Arcticacanthus by Valiukevicius (2003).
It was assigned to Ischnacanthidae by Valiukevicius (2003).
It was corrected as Arcticacanthus by Valiukevicius (2003).
It was assigned to Ischnacanthidae by Valiukevicius (2003).
Species
A. bicostatus (type species)
Synonymy list
| Year | Name and author |
|---|---|
| 2003 | Arcticacanthus Valiukevicius p. 186 |
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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. †Arcticacanthus Valiukevicius 2003
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†Arcticacanthus bicostatus Valiukevicius 2003
Diagnosis
| Reference | Diagnosis | |
|---|---|---|
| Valiukevicius 2003 | Ischnacanthid having mid-sized subrhombic scales, with crowns ornamented by four to six sub-parallel high ridges, extending on two thirds of its length and bifurcating anteriorly. High neck with pore openings. Dentine-like tissue of crown perforated by a pore canal system, composed of radial canals high in the neck, longitudinal canals in crown along superficial grooves, connected by uneven ascending ones formed anew in each growth lamella. |
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: one only
| Time interval | Ma | Country or state | Original ID and collection number |
|---|---|---|---|
| Lochkovian | Russian Federation | A. bicostatus (90330) |