Misplaced Pages

Tiucetus Temporal range: Tortonian ~11–9 Ma PreꞒ Ꞓ O S D C P T J K Pg N ↓
Holotype skull in lateral view
Scientific classification
Domain:	Eukaryota
Kingdom:	Animalia
Phylum:	Chordata
Class:	Mammalia
Order:	Artiodactyla
Infraorder:	Cetacea
Family:	Cetotheriidae
Genus:	†Tiucetus Marx, Lambert & De Muizon 2017

Tiucetus is an extinct genus of cetotheriid baleen whale known from the Late Miocene Pisco Formation of Peru.

Description

Tiucetus is distinct from other cetotheriids in having a squamosal cleft; from eomysticetids in having comparatively short nasals, a more anteriorly projected supraoccipital and parietal, and a tympanic bulla that is rotated so that the inner posterior prominence faces dorsally.

Classification

Tiucetus falls basally in Cetotheriidae, less derived than Joumocetus and Cephalotropis.

Palaeogeography

Other marine mammals found in the Pisco Formation include another cetotheriid, Piscobalaena, the odd dolphin Odobenocetops, the killer sperm whale Acrophyseter, the long-necked seal Acrophoca, and aquatic sloth Thalassocnus.

References

1. Marx, F., Lambert, O., de Muizon, C. 2017. A new Miocene baleen whale from Peru deciphers the dawn of cetotheriids. Royal Society Open Science. doi: 10.1098/rsos.170560

v t e Genera of baleen whales and their extinct allies
Kingdom: Animalia Phylum: Chordata Class: Mammalia Order: Artiodactyla Infraorder: Cetacea
Mysticeti Mysticeti †Borealodon †Coronodon †Imerocetus †Mioceta? †Piscocetus †Siphonocetus? †Tretulias? †Ulias? †Aetiocetidae Aetiocetus Ashorocetus Chonecetus Fucaia Morawanocetus Willungacetus †Llanocetidae Llanocetus Mystacodon †Mammalodontidae Janjucetus Mammalodon Chaeomysticeti Horopeta Sitsqwayk Whakakai †Eomysticetoidea Cetotheriopsis †Eomysticetidae Eomysticetus Micromysticetus Tohoraata Tokarahia Waharoa Yamatocetus Balaenomorpha Balaenidae †Antwerpibalaena †Archaeobalaena Balaena †Balaenella †Balaenula †Balaenotus Eubalaena †Idiocetus †Mesoteras †Morenocetus †Peripolocetus †Protobalaena Thalassotherii †Hibacetus †Isanacetus †Isocetus †Mauicetus †Pinocetus †Taikicetus †Tiphyocetus †Uranocetus †Aglaocetidae Aglaocetus †Diorocetidae Amphicetus Diorocetus Plesiocetopsis Thinocetus †Pelocetidae Cophocetus Halicetus Parietobalaena Pelocetus †Tranatocetidae Mesocetus Mixocetus Tranatocetus Cetotheriidae †Cephalotropis †Journocetus †Otradnocetus †Palaeobalaena? †Titanocetus? †Tiucetus †Cetotheriinae Brandtocetus Cetotherium Ciuciulea Eucetotherium Kurdalagonus Mithridatocetus Vampalus Zygiocetus Herpetocetinae Caperea †Herentalia †Herpetocetus †Metopocetus †Miocaperea †Nannocetus †Piscobalaena Balaenopteroidea †Eobalaenoptera Balaenopteridae †Archaebalaenoptera †Archaeschrichtius Balaenoptera †Burtinopsis? †Cetoteriophanes †Diunatans †Eschrichtioides Eschrichtius †Gricetoides †Incakujira Megaptera †Megapteropsis? †Miobalaenoptera †Nehalaennia †Notiocetus †Parabalaenoptera †Plesiobalaenoptera †Plesiocetus †Praemegaptera †Protororqualus

This prehistoric cetacean-related article is a stub. You can help Misplaced Pages by expanding it.

• v
• t
• e

• Baleen whales
• Monotypic prehistoric cetacean genera
• Miocene mammals of South America
• Neogene Peru
• Fossils of Peru
• Fossil taxa described in 2017
• Prehistoric cetacean stubs