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Xenorophus simplicidens
Taxonomy
Xenorophus simplicidens was named by Boessenecker and Geisler (2023). Its type specimen is CCNHM 8720, a partial skeleton (partial skeleton including a nearly complete but crushed skull, right mandible, nearly complete upper and lower dentition, five cervical vertebrae, eight or nin), and it is a 3D body fossil. Its type locality is North Charleston, Chandler Bridge Fm., Bed 2, which is in a Chattian marine sandstone in the Chandler Bridge Formation of South Carolina.
Synonymy list
| Year | Name and author |
|---|---|
| 2023 | Xenorophus simplicidens Boessenecker and Geisler p. 12 |
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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.
†Xenorophus simplicidens Boessenecker and Geisler 2023
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Diagnosis
| Reference | Diagnosis | |
|---|---|---|
| R. W. Boessenecker and J. H. Geisler 2023 | A large xenorophid dolphin, with approximate adult condy- lobasal length of 68–74 cm and bizygomatic width of 27–30.8 cm and differing from Xenoro- phus sloanii in possessing anteroposteriorly shorter nasals (16–19% of bizygomatic width vs. 22–29% in X. sloanii), nasal process of premaxilla lacking lateral overhanging crest adjacent to bony nares in adult specimens, right antorbital fossa longer than left (left longer than right in X. sloanii), rounded anterior margin of bony nares, anteroposteriorly shorter supraorbital process (distance from antorbital notch to posterior edge of supraorbital pro- cess 34% of bizygomatic width vs. 43% in X. sloanii), slightly narrower nasals with posterior end narrower than bony nares, left and right palatines separated by an anteroposteriorly long median triangular exposure of maxilla, paroccipital processes not extending posterior to occipital condyles, longer median furrow on the tympanic bulla (except ChM PV 4266), fewer teeth with accessory denticles (only on PC 7–9, as opposed to PC 5–9 in X. sloanii), fewer accessory denticles per tooth (three distal cusps vs. five in X. sloanii; one–three mesial cusps vs. three–four in X. sloanii), widespread striated enamel throughout dentition and nodular enamel only present on PC7–9 and less rugose than in X. sloanii (nodular enamel on PC5–9). |
Measurements
No measurements are available
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| Source: subo = suborder, o = order | |||||
| Reference: Uhen 2004 | |||||