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Taxonomy
Dolgopolis was named by Viglino et al. (2021). Its type is Dolgopolis kinchikafiforo.
It was assigned to Platanistoidea by Viglino et al. (2021).
It was assigned to Platanistoidea by Viglino et al. (2021).
Species
D. kinchikafiforo (type species)
Synonymy list
| Year | Name and author |
|---|---|
| 2021 | Dolgopolis Viglino 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. †Dolgopolis Viglino et al. 2021
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†Dolgopolis kinchikafiforo Viglino et al. 2021
Diagnosis
| Reference | Diagnosis | |
|---|---|---|
| M. Viglino et al. 2021 | Dolgopolis kinchikafiforo is a medium-sized odontocete characterized by the following apomorphies: a rostrum of me- dium length (see below), mediolaterally wide at its mid-length and a mediolaterally compressed premaxillae at its anteriormost portion (Table 1); a ventral infraorbital foramen formed dorsolaterally by the maxilla; a lacrimojugal forming
the posterior wall of the antorbital notch, visible in dorsal view; presence of a shallow premaxillary cleft; a convex ven- tral edge of the zygomatic process; a concave paroccipital process; a wide basioccipital and an open squared-like jugular notch. Also, Dolgopolis kinchikafiforo has the following com- bination of anatomical characteristics: absence of defined al- veoli in the maxilla and instead presence of a basirostral groove; a marked intertemporal constriction, visible in dorsal view; and a prenarial basin on the premaxilla only. Additionally, Dolgopolis kinchikafiforo differs from the re- maining members of the Platanistoidea (including Aondelphis talen and Prosqualodon davidis) in having: a blunt, robust postorbital process that descends posteriorly (ch. 49); premaxillae extending posterior to anterior tip of nasals (ch. 59); basioccipital crests with an angle of 70–90° (ch. 161); a rostral constriction anterior to maxillary flange (except Phoberodon arctirostris, ch. 9); in the ventral direction of the apex of the postorbital process (except Notocetus vanbenedeni and Phoberodon arctirostris, ch. 48); in lacking the premaxil- lary crest adjacent to nasal (except Phoberodon arctirostris, ch. 72); a lacrimal appearing slightly dorsally in antorbital process (ch. 39); two dorsal infraorbital foramina (except Otekaikea huata, ch. 51); a deep emargination on the posterior edge of zygomatic process (except Aondelphis talen, Otekaikea marplesi, and ZMT-73, ch. 114); and in having a shallow pterygoid sinus fossa (except Otekaikea and Waipatia, ch. 134). It differs from Platanistidae in having the pterygoids separated from each other by the palatines (ch. 128). Dolgopolis kinchikafiforo differs from Platanistidae and Notocetus vanbenedeni in having an anteromedially angled pterygoid-palatine medial suture (ch. 129) and a pterygoid si- nus fossa interrupted posterior to antorbital notch (ch. 135); and it differs from Platanistidae and Phoberodon arctirostris in having a triangular antorbital process of the maxilla (ch. 36). Dolgopolis kinchikafiforo differs from Platanistidae and Phoberodon arctirostris in the presence of an enlarged tympanosquamosal recess forming a triangular fossa (ch. 148). It also differs from Platanistidae and Squalodon calvertensis in having a completely ventrally exposed palatine (ch. 124); and from Platanistidae and Otekaikea in having the ventromedial edge of the internal opening of the infraorbital foramen formed by the maxilla (ch. 46). Dolgopolis kinchikafiforo differs from Agorophius pygmaeus, Phoberodon arctirostris, Prosqualodon australis, Prosqualodon davidis, Pomatodelphis inaequalis, Squalodelphis fabianii, and Zarhachis flagellator in having the premaxillary foramen located posterior to the antorbital notch (ch. 55). It also differs from Aondelphis talen, Platanista gangetica, Phoberodon arctirostris, Pomatodelphis inaequalis, Prosqualodon davidis, and Waipatia in the ventrally tapered postglenoid process (ch. 118). Dolgopolis kinchikafiforo differs from Phoberodon arctirostris in having an almost undeveloped tympanosquamosal recess (ch. 149); from Notocetus vanbenedeni, Papahu taitapu, Phoberodon arctirostris, Platanista gangetica, Prosqualodon australis, Prosqualodon davidis, Waipatia maerewhenua, and Zarhachis flagellator in having a shallow posterolateral sulcus (ch. 58). It differs from Phoberodon arctirostris, Platanista gangetica, Prosqualodon australis, Prosqualodon davidis, and Waipatia maerewhenua, in the medial location of the premaxillary foramen (ch. 56). Dolgopolis kinchikafiforo differs from Agorophius pygmaeus, Prosqualodon australis, Squalodelphis fabianii, and Waipatia maerewhenua in the presence of a shallow premaxillary cleft (ch. 86). It differs from Agorophius pygmaeus, Aondelphis talen, Otekaikea, Pomatodelphis inaequalis, Squalodon calvertensis, and Waipatia maerewhenua in having a posterior sinus fossa moderately concave (ch. 166). It also differs from Notocetus vanbenedeni, Otekaikea huata, Squalodelphis fabianii, and Zarhachis flagellator in having the zygomatic process anteriorly tapered in lateral view (ch. 111). It differs from Phoberodon arctirostris in having the right premaxilla that widens laterally posterior to the premaxillary foramen (ch. 57). Dolgopolis kinchikafiforo differs from Agorophius pygmaeus and Squalodelphis fabianii in having the posteroventral-most point of the basioccipital crest rounded over (ch. 160), and from Agorophius pygmaeus in having the proximal ethmoid region exposed dorsally (ch. 82). |
Measurements
No measurements are available
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| Source: subo = suborder, o = order | |||||
| Reference: Uhen 2004 | |||||
Age range: Burdigalian or 20.44000 to 15.97000 Ma
Collections: one only
| Time interval | Ma | Country or state | Original ID and collection number |
|---|---|---|---|
| Burdigalian | Argentina (Chubut) | D. kinchikafiforo (203129) |