A new archaic homodont toothed cetacean (Mammalia, Cetacea, Odontoceti) from the early Miocene of Peru

@inproceedings{Lambert2015ANA,
  title={A new archaic homodont toothed cetacean (Mammalia, Cetacea, Odontoceti) from the early Miocene of Peru},
  author={Olivier Lambert and Christian de Muizon and Giovanni Bianucci},
  year={2015}
}
ABSTRACT Apart from a few exceptions, extant odontocetes (toothed cetaceans) exhibit a roughly homodont dentition. The transition from basilosaurid-like double-rooted cheek teeth with accessory denticles to single-rooted conical teeth occurred during the late Oligocene-early Miocene. At that time, several clades of now extinct, homodont and predominantly long-snouted odontocetes appeared in the fossil record. Among them, members of the genera Argyrocetus Lydekker, 1893 and Macrodelphinus Wilson… 
A new odontocete (toothed cetacean) from the Early Miocene of Peru expands the morphological disparity of extinct heterodont dolphins
TLDR
With its large size, robust rostrum and unusual dental morphology, and the absence of conspicuous tooth wear, Inticetus increases the morphological and ecological disparity of Late Oligocene–Early Miocene heterodont odontocetes.
First Toothless Platanistoid from the Early Miocene of Patagonia: the Golden Age of Diversification of the Odontoceti
TLDR
A partitioning of the ecological niches in the early phases of platanistoid evolution, as well as a high diversification of feeding methods previously underestimated for this period, suggests ecological adaptations have a strong evolutionary pressure in odontocete communities and should be further explored.
A NEW RECORD OF MESSAPICETUS FROM THE PIETRA LECCESE (LATE MIOCENE, SOUTHERN ITALY): ANTITROPICAL DISTRIBUTION IN A FOSSIL BEAKED WHALE (CETACEA, ZIPHIIDAE)
TLDR
Similarities at the level of the morphology and proportions of the oral apparatus suggest that the two species of Messapicetus may have occupied roughly identical ecological and trophic niches, a hypothesis supported by the characterization of the Pietra leccese environment as neritic.
Yaquinacetus meadi, a new latest Oligocene–early Miocene dolphin (Cetacea, Odontoceti, Squaloziphiidae, fam. nov.) from the Nye Mudstone (Oregon, U.S.A.)
TLDR
The phylogenetic analysis confirms the sister-group relationship between S. emlongi and Y. meadi, either as late diverging stem odontocetes or as early crown odontOCetes, but distant from Ziphiidae.
New beaked whales from the late Miocene of Peru and evidence for convergent evolution in stem and crown Ziphiidae (Cetacea, Odontoceti)
TLDR
New fossil beaked whales from the late Miocene of the Pisco Formation (southern Peru) are reported, confirming the high past diversity of Ziphiidae and suggesting that these trends may be linked to a convergent ecological shift to deep diving and suction feeding.
Arktocara yakataga, a new fossil odontocete (Mammalia, Cetacea) from the Oligocene of Alaska and the antiquity of Platanistoidea
TLDR
With a geochronologic age between ∼29–24 million years old, Arktocara is among the oldest crown Odontoceti, reinforcing the long-standing view that the diversification for crown lineages must have occurred no later than the early Oligocene.
A new platanistoid, Perditicetus yaconensis gen. et sp. nov. (Cetacea, Odontoceti), from the Chattian–Aquitanian Nye Formation of Oregon
TLDR
An archaic odontocete is described, named Perditicetus yaconensis, from the latest Oligocene–earliest Miocene Nye Formation in Oregon, which possesses several synapomorphies of the Platanistoidea and is considered to be one of the basal-most derived platanistoids.
Extensive Diversity and Disparity of the Early Miocene Platanistoids (Cetacea, Odontoceti) in the Southeastern Pacific (Chilcatay Formation, Peru)
TLDR
The fossils here examined further confirm the high diversity and disparity of platanistoids during the early Miocene, and suggest a high trophic partitioning of this peculiar cetacean paleocommunity.
Awamokoa tokarahi, a new basal dolphin in the Platanistoidea (late Oligocene, New Zealand)
TLDR
The morphologies of the temporal fossa and mandible suggest that Awamokoa and other more basal platanistoids (Waipatia) were probably macroraptorial feeders with a strong bite, while later-diverging fossil platanists and the modern Platanista gangetica probably had/has a faster but weaker bite.
Late Miocene Survival of a Hyper-Longirostrine Dolphin and the Neogene to Recent Evolution of Rostrum Proportions Among Odontocetes
Hyper-longirostry, the character of having extremely elongated rostra, emerged in the early and middle Miocene among several different clades of echolocating toothed whales (odontocetes) followed by
...
...

References

SHOWING 1-10 OF 61 REFERENCES
Huaridelphis raimondii, a New Early Miocene Squalodelphinidae (Cetacea, Odontoceti) from the Chilcatay Formation, Peru
ABSTRACT The fossil record of odontocetes (toothed cetaceans) is relatively scarce during the Oligocene and early Miocene compared with later in the Miocene and Pliocene; most of the odontocete
The most basal beaked whale Ninoziphius platyrostris Muizon, 1983: clues on the evolutionary history of the family Ziphiidae (Cetacea: Odontoceti)
TLDR
The morphology of the oral apparatus suggests that Ninoziphius was less specialized for suction feeding than most extant ziphiids and is the most basal stem ziphiid in the cladistic analysis.
PHYLOGENETIC AFFINITIES OF THE LONG‐SNOUTED DOLPHIN EURHINODELPHIS (CETACEA, ODONTOCETI) FROM THE MIOCENE OF ANTWERP, BELGIUM
TLDR
A new skull belonging to the species Eurhinodelphis cocheteuxi, found in the upper Lower–Middle Miocene of Antwerp, is the basis of a redescription and systematic revision of the species and the main results of the cladistic analyses are a sister‐group relationship between E. cocheteuxo and the extant family Ziphiidae, and a more basal position of the superfamily Physeteroidea in the tree.
Review of the Miocene long-snouted dolphin Priscodelphinus cristatus DU BUS, 1872 (Cetacea, Odontoceti) and phylogeny among eurhinodelphinids
TLDR
A cladistic analysis is undertaken in a way to examine the phylogenetic relationships between the best-known eurhinodelphinid genera, leading to a sister-group relationship between Schizodelphis + Xiphiacetus and Ziphiodelphis and (Mycteriacetus + Argyrocetus), and a more stemward EurhinodELphis.
Papahu taitapu, gen. et sp. nov., An Early Miocene Stem Odontocete (Cetacea) from New Zealand
TLDR
The holotype of Papahu taitapu includes a skull with an open mesorostral canal, a broad-based rostrum (broken anteriorly), two pairs of premaxillary foramina, a slight bilateral asymmetry at the antorbital notches, and single-rooted (and probably homodont) teeth.
Killer sperm whale: a new basal physeteroid (Mammalia, Cetacea) from the Late Miocene of Italy
TLDR
Large body size, large teeth present in both lower and upper jaw, and anteroposteriorly elongated temporal fossa and zygomatic process of the squamosal indicate that this cetacean was an active predator adapted to feeding on large prey, similarly to the extant killer whale.
Australodelphis mirus, a bizarre new toothless ziphiid-like fossil dolphin (Cetacea: Delphinidae) from the Pliocene of Vestfold Hills, East Antarctica
Australodelphis mirus (Delphinidae n. gen., n. sp) is a small extinct Early Pliocene dolphin known from five individuals from shallow-water strata of the Sørsdal Formation, Vestfold Hills, East
A Phylogenetic Analysis of the Superfamily Platanistoidea ( Mammalia , Cetacea , Odontoceti )
  • Biology
  • 2016
TLDR
A cladistic analysis of fossil and living Platanistoidea supports theories of monophyly of the super­ family Platanismeidea and of the family platanistidae.
High concentration of long-snouted beaked whales (genus Messapicetus) from the Miocene of Peru.
TLDR
A parsimony analysis reveals that Messapicetus belongs to a basal clade, which includes other ziphiids with a dorsally closed mesorostral groove and prenarial basin, and supports the hypothe- sis of site fidelity; these cetaceans might have lived in a lim- ited region for a long period for both breeding and feeding.
...
...