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Nehalaennia devossi
Taxonomy
Nehalaennia devossi was named by Bisconti et al. (2019). Its type specimen is NMR 999100014035, a partial skull (partial skull including periotics), and it is a 3D body fossil. Its type locality is Pit De Griete, which is in a Tortonian marine sandstone in the Breda Formation of the Netherlands. It is the type species of Nehalaennia.
Synonymy list
| Year | Name and author |
|---|---|
| 2019 | Nehalaennia devossi Bisconti et al. p. 8 |
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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.
†Nehalaennia devossi Bisconti et al. 2019
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Diagnosis
| Reference | Diagnosis | |
|---|---|---|
| M. Bisconti et al. 2019 | Nehalaennia devossi differs from Archaebalaenoptera castriarquati in having a rounded anterior border of the supraoccipital, anterior half of the supraoccipital not strongly compressed transversely, widely concave posterior border of the maxilla, shorter and wider ascending process of the maxilla, significantly shorter nasal bones and anterior border of the supraorbital process of the frontal anterolaterally concave. It differs from Plesiobalaenoptera quarantellii in showing a lower superior portion of the periotic, shorter and wider ascending process of the maxilla, more slender lateral process of the maxilla with deeper antorbital notch, posterior end of the posterior process of the periotic more robust and round. It differs from ‘Megaptera’ hubachi in having a ventrally concave glenoid fossa of the squamosal with the postglenoid process projecting ventrally and forming a c. 90 angle with the zygomatic process of the squamosal, in having a rounded anterior border of the supraoccipital, and in lacking exposure of the alisphenoid in the temporal fossa. It differs from ‘Balaenoptera’ bertae in having a wider and rounder anterior border of the supraoccipital, in having an anterolaterally concave anterior border of the supraorbital process of the frontal, in having a vertically-oriented postglenoid process of the squamosal making the glenoid fossa of the squamosal more concave in lateral view. It differs from Incakujira anillodefuego
in having a rounder and wider anterior border of the supraoccipital, in having a comparatively shorter and slender supraorbital process of the frontal and a comparatively shorter zygomatic process of the squamosal, in having the premaxilla terminating anteriorly to the nasal. It differs from ‘Megaptera’ miocaena in having a narrower anterior border of the supraoccipital, comparatively longer ascending process of the maxilla with ‘primary dorsal infraorbital foramina’, more concave glenoid fossa of the squamosal. It differs from Fragilicetus velponi in lacking a squamosal bulging into the temporal fossa, in having a wider anterior border of the supraoccipital, in having a less strongly protruding posterolateral corner of the exoccipital, in having a rounded dorsal border of the periotic. It differs from Protororqualus cuvieri in having a wider and rounder anterior border of the supraoccipital, in having shorter zygomatic process of the squamosal, in having a wider space between the posterior border of the maxilla and the anterior border of the supraorbital process of the frontal, and in having an anterolaterally concave anterior border of the supraorbital process of the frontal. The same differences are observed when Nehalaennia devossi is compared against ‘Balaenoptera’ cortesi var. portisi. It differs from Parabalaenoptera baulinensis in having shorter and wider ascending process of the maxilla, rounded supraoccipital and shorter nasal bones. Nehalaennia devossi differs from the genus Balaenoptera in having a rounded anterior border of the supraoccipital, rounded posterior end of the ascending process of the maxilla, anterolaterally concave anterior border of the supraorbital process of the frontal, alisphenoid not exposed in the temporal fossa. It differs from Megaptera novaeangliae in having zygomatic process of the squamosal less diverging from the longitudinal axis of the skull, anterior border of the pars cochlearis of the periotic not strongly protruded, and more concave glenoid fossa of the squamosal in lateral view. |
Measurements
No measurements are available
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| Source: f = family, subo = suborder, o = order | |||||
| References: Uhen 2004, Nowak 1991 | |||||