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Ostrombatrachos nodos
Taxonomy
Ostrombatrachos nodos was named by Oreska et al. (2024). Its type specimen is USNM 768869, a maxilla (R maxilla), and it is a 3D body fossil. Its type locality is USNM Loc. 42222, which is in an Aptian/Albian lacustrine claystone in the Cloverly Formation of Wyoming. It is the type species of Ostrombatrachos.
Synonymy list
| Year | Name and author |
|---|---|
| 2024 | Ostrombatrachos nodos Oreska et al. p. 3 figs. 1-2 |
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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.
†Ostrombatrachos nodos Oreska et al. 2024
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Diagnosis
| Reference | Diagnosis | |
|---|---|---|
| M. P. J. Oreska et al. 2024 | Differs from all other salientians in the following unique combination of maxillary features: edentulous; lateral surface ornamented with pit-and-ridge ornament consisting of low-relief, moderately broad, and weakly vermiform ridges enclosing shallow, small to large, circular to irregular pits and anteroposteriorly elongate grooves; moderately shallow, broad groove extends a short distance lateroanteriorly across dorsal surface near junction between margo orbitalis and posterior base of processus frontalis and continues as a shallower groove extending anteroventrally down lateral surface of pars facialis, interrupting pit-and-ridge ornament and terminating just above crista dentalis; margo orbitalis short anteroposteriorly and shallowly concave in medial or lateral profile, with rim expanded medially as a prominent, dorsoventrally shallow flange; postorbital region moderately deep and of consistent height along preserved anterior length, with dorsal edge of processus zygomatico-maxillaris nearly horizontal, only slightly higher than margo orbitalis in lateral or medial view, and moderately narrow in dorsal view; bone-to-bone contact with squamosal indicated by roughened surface that wraps lateroposteriorly across medially expanded posterior border of margo orbitalis and extends posteriorly along narrow dorsal margin of processus zygomatico-maxillaris; anteroposteriorly elongate groove in dorsomedial surface of processus zygomatico-maxillaris; lamina horizontalis moderately developed as bony ledge, triangular in cross section anteriorly, mediolateral width ∼90% of dorsoventral depth of lamina horizontalis, and maximum depth ∼20% of minimum suborbital depth of maxilla; processus pterygoideus weakly developed, subrectangular, and not projecting medially beyond medial surface of lamina horizontalis; crista dentalis shallow (height accounts for ∼15% of minimum suborbital depth for maxilla), with posterior limit slightly anterior to posterior margin of processus pterygoideus; and shallow, subcircular pits scattered along medial surface of crista dentalis in preorbital region. |
Measurements
No measurements are available
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| Source: subo = suborder, c = class, subp = subphylum, uc = unranked clade | |||||
| References: Carroll 1988, Uhen 2004, Hendy et al. 2009 | |||||
Collections: one only
| Time interval | Ma | Country or state | Original ID and collection number |
|---|---|---|---|
| Aptian - Albian | USA (Wyoming) | Ostrombatrachos nodos (type locality: 137577) |