| Basic info | Taxonomic history | Classification | Included Taxa |
| Morphology | Ecology and taphonomy | External Literature Search | Age range and collections |
Alienacanthus
Taxonomy
Alienacanthus was named by Kulczycki (1957).
It was assigned to Selenosteidae by Jobbins et al. (2024).
It was assigned to Selenosteidae by Jobbins et al. (2024).
Species
Synonymy list
| Year | Name and author |
|---|---|
| 1957 | Alienacanthus Kulczycki p. 357 |
| 2024 | Alienacanthus Jobbins 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.
Diagnosis
| Reference | Diagnosis | |
|---|---|---|
| M. Jobbins et al. 2024 | Large eubrachythoracid with long protruding IGs that bear a series of in-line teeth on the labial edge of the jaw, which are posteriorly recurved. The IGs reach about twice the length of the skull including the superognathals and lack traces of attachment for the mentomeckelian cartilage. Both superognathals have a vertical dorsal process instead of horizontal and have sharp recurved teeth posteriorly and worn teeth anteriorly. The ASGs protrude shortly anterior of the rostrum. The dermal plates of the skull-roof show no ornamentation. The rostral plate is pronounced, deprived of the laterally developed wings anteriorly, and its simple non-jagged contact with the pineal plate separate the preorbitals. The preorbital and central plates are of subequal length. The central plates only join at a single contact point with the pineal and nuchal plates. The orbits are large, and the suborbital plates possess a well-developed linguiform process. The embayment of the nuchal plate is deep and therefore the nuchal gap is probably large. |
Measurements
No measurements are available
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| Source: o = order, subp = subphylum | |||||
| Reference: Carroll 1988 | |||||
Age range: Middle Frasnian or 379.00000 to 375.20000 Ma
Collections: one only
| Time interval | Ma | Country or state | Original ID and collection number |
|---|---|---|---|
| Middle Frasnian | Poland (Swietokrzyskie Voivodship) | A. malkowskii (239070) |