| Basic info | Taxonomic history | Classification | Included Taxa |
| Morphology | Ecology and taphonomy | External Literature Search | Age range and collections |
Taxonomy
Herbeinodelphis nancei was named by Godfrey and Lambert (2023). Its type specimen is CMM-V-8343, a partial skeleton (partial skull consisting of a complete rostrum (preserving four teeth in situ) back to the level of the right supraorbital process (Figure 2.48), the right peri), and it is a 3D body fossil. Its type locality is Warriors' Rest, which is in a Langhian/Serravallian marine horizon in the Calvert Formation of Maryland. It is the type species of Herbeinodelphis.
Synonymy list
| Year | Name and author |
|---|---|
| 2023 | Herbeinodelphis nancei Godfrey and Lambert p. 128 figs. FIGURES 2.48–2.54 |
Is something missing? Join the Paleobiology Database and enter the data
|
|
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.
†Herbeinodelphis nancei Godfrey and Lambert 2023
show all | hide all
Diagnosis
| Reference | Diagnosis | |
|---|---|---|
| S. J. Godfrey and O. Lambert 2023 | Small (Pontoporia blainvil- lei–size) odontocete with estimated condylobasal length of 400 mm that can be diagnosed on the basis of the following unique combination of characters: narrow elongate rostrum with ratio of length/width at base equal to 3.25; rostrum length 273 mm (antorbital notch to anterior extremity); 55 alveoli in left maxilla; 2 (possibly 3) alveoli per premaxilla; dorsal exposure of max- illa at rostrum base not significantly wider than premaxilla; anterodorsal corner of the zygomatic process of the squamosal anterior to anteroventral corner; tympanosquamosal recess oc- cupying less than one-third of the height of the anterior part of the zygomatic process; markedly anteriorly pointed internal acoustic meatus of the periotic; small and subcircular aperture for the vestibular aqueduct, roughly the size of the aperture for the cochlear duct; posterior process of periotic elongated with a fingerlike apex; dorsoventrally highest part of the involucrum of the tympanic bulla in medial view located in anterior half of the tympanic bulla; fused and elongated mandibular symphysis making about 60% of rostrum length; premaxillary and anterior dorsal infraorbital foramen posterior to the level of the antorbital notch; enamel crown of teeth conical and curved medially, lack- ing any ornamentation or accessory denticles; height of crown up to 6 mm; and enamel base of crown up to 3 mm in diameter.
D0"*+$.%$'(. Rostrum: The rostrum of this small dol- phin is elongated and narrow, with the ratio of length/width at the base of rostrum equal to 3.25 (Figure 2.48). Width at ros- trum base is slightly greater than in Kentriodon pernix (USNM V 10670) and Pithanodelphis cornutus (USNM PAL 187575). P+0#)<$//). In CMM-V-8343, the right premaxilla is well preserved from the level of the premaxillary foramen forward (Figure 2.48). In dorsal view throughout its length, the premaxillae present a dorsally open mesorostral canal. In CMM-V-8343, the left premaxilla has been crushed somewhat medially, artificially narrowing the width of the dorsal opening of the canal. Nevertheless, the posterior half of the latter was only narrowly open dorsally. Conversely, the anterior half of the mesorostral canal becomes increasingly open. The posteriormost part of the premaxilla that is preserved on the rostrum presents a nearly horizontal, slightly transversely convex surface. As one follows the premaxilla forward, this con- vex surface in the horizontal plane turns increasingly vertical such that it is nearly so at its anteriormost extremity. A shal- low trough marks the horizontal suture between the premaxilla and maxilla. The trough becomes increasingly shallow anteriorly where the two bones appear to be inextricably fused. There ap- pears to have been room for two, perhaps three, tooth alveoli in the premaxilla. The right premaxillary foramen is located just posterior to the level of the antorbital notch. Only the anteriormost part of the right premaxillary sac fossa is preserved. |
Measurements
No measurements are available
|
|
||||
|
|
||||
|
|
||||
|
|||||
|
|
||||
|
|
||||
| Source: subo = suborder, o = order | |||||
| Reference: Uhen 2004 | |||||
Age range: base of the Langhian to the top of the Serravallian or 15.98000 to 11.63000 Ma
Collections: one only
| Time interval | Ma | Country or state | Original ID and collection number |
|---|---|---|---|
| Langhian - Serravallian | USA (Maryland) | Herbeinodelphis nancei (type locality: 231780) |