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Britosteus
Taxonomy
Britosteus was named by Martinelli et al. (2025). Its type is Britosteus amarildoi.
It was assigned to Lepisosteidae by Martinelli et al. (2025).
It was assigned to Lepisosteidae by Martinelli et al. (2025).
Species
B. amarildoi (type species)
Entered
by D. Sinopoli (authorized by M. Uhen) on 2026-05-05; modified by D. Sinopoli on 2026-05-04
Synonymy list
| Year | Name and author |
|---|---|
| 2025 | Britosteus Martinelli 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. †Britosteus Martinelli et al. 2025
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†Britosteus amarildoi Martinelli et al. 2025
Diagnosis
| Reference | Diagnosis | |
|---|---|---|
| A. Martinelli et al. 2025 | Britosteus is diagnosed by a unique combination of traits:
anteroposteriorly short dentary bone; dentaries with the anterior ends strongly curved medially, that together form an “U”-shaped profile in ventral view; lateromedially broad anterior half of the dentary, that tapers to a narrower posterior haft; dental symphysis confined to the anterior end, without extending along the medial edge of the dentary; dentary dentition composed of a row of small lateral teeth, and a row of larger teeth arranged medially; apex of the teeth with a layer of hypermineralized tooth cap and the shaft with folds of plicidentine; posterior coronoid lacks evidence of developed teeth; opercular and subopercular with a strong ornamentation on the external surface of the bone; subopercular and postcleithral scale with distinctively crenulated posteroventral edges; parasphenoid with lateral expansions that reach a width greater than that of the posterior extensions that delimit the aortic notch; scales with an external layer of ganoin with a pattern of tubercles and intertubercular spaces, arranged in a similar way to that described for the genus Lepisosteus. |
Measurements
No measurements are available
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| Source: o = order, subp = subphylum | |||||
| References: Hendy et al. 2009, Carroll 1988 | |||||
Age range: base of the Late/Upper Campanian to the top of the Early/Lower Maastrichtian or 83.60000 to 66.00000 Ma
Collections: one only
| Time interval | Ma | Country or state | Original ID and collection number |
|---|---|---|---|
| Late/Upper Campanian - Early/Lower Maastrichtian | Brazil (Minas Gerais) | B. amarildoi (type locality: 113112) |