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Fucaia humilis

Mammalia - Cetacea - Aetiocetidae

Taxonomy
Fucaia humilis was named by Tsai et al. (2024). Its type specimen is UWBM 109363, a partial skull (posterior portion of a skull with right periotic and bulla attached, partial mandible, and the hyoid apparatus), and it is a 3D body fossil. Its type locality is Middle Fork of Statsop River, west bank, which is in a Priabonian basinal (siliceous) mudstone/siltstone in the Lincoln Creek Formation of Washington.

Synonymy list
YearName and author
2024Fucaia humilis Tsai et al. figs. Fig. 1-2

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RankNameAuthor
kingdomAnimalia()
—Bilateria
—EubilateriaAx 1987
—Deuterostomia
phylumChordataHaeckel 1874
subphylumVertebrata
superclassGnathostomata
—Osteichthyes()
subclassSarcopterygii()
subclassDipnotetrapodomorpha(Nelson 2006)
subclassTetrapodomorpha()
—Tetrapoda
—Reptiliomorpha
—Anthracosauria
subclassAmphibiosauriaKuhn 1967
—Cotylosauria()
—Amniota
subclassSynapsida
—Therapsida()
infraorderCynodontia()
—Mammaliamorpha
—Mammaliaformes
RankNameAuthor
classMammalia
—Cladotheria
—Zatheria
subclassTribosphenida()
subclassTheria
—Eutheria()
—Placentalia
—Boreoeutheria
—Laurasiatheria
—Scrotifera
—Euungulata
—Artiodactylamorpha
—Artiodactyla()
—Whippomorpha
orderCetacea
—Pelagiceti
—Neoceti
suborderMysticeti
familyAetiocetidae
genusFucaia
specieshumilis

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.

†Fucaia humilis Tsai et al. 2024
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Diagnosis
ReferenceDiagnosis
C.-H. Tsai et al. 2024Fucaia humilis sp. nov. shares with other species of Fucaia a newly identified synapomorphy: a shallow and rounded second- ary squamosal fossa on the posterolateral margin of the squa- mosal (Figure 1). Eomysticetids possess a similar character, but the homology within Mysticeti remains uncertain. Further- more, Fucaia humilis sp. nov. differs from all other aetiocetids and other Fucaia species by having the following unique haracter combination: a shorter intertemporal constriction exposed on the skull vertex; the presence of a distinct nuchal tu- bercle at the junction of parieto-squamosal suture and supraoc- cipital; a broadly rounded, dorsally low, and lobate coronoid pro- cess of the mandible; the presence of a postcoronoid elevation; and rounded anterior border of the tympanic bulla.
Measurements
No measurements are available
Composition: hydroxyapatitesubo
Form: roller-shapedo
Ontogeny: modification of partso
Environment: marinesubo
Locomotion: actively mobileo
Life habit: aquaticsubo
Depth habitat: surfaceo
Diet: carnivoresubo
Diet 2: suspension feedersubo
Reproduction: viviparouso
Created: 2005-03-06 14:20:41
Modified: 2005-03-06 16:34:40
Source: subo = suborder, o = order
Reference: Uhen 2004

Age range: Priabonian or 37.71000 to 33.90000 Ma

Collections: one only


Time interval Ma Country or state Original ID and collection number
Priabonian37.71 - 33.9USA (Washington) Fucaia humilis (type locality: 205032)