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Eotheroides lambondrano

Mammalia - Sirenia - Dugongidae

Taxonomy
Eotheroides lambondrano was named by Samonds and Zalmout (2009). Its type specimen is University of Antananarivo 9046, a partial skull, and it is a 3D body fossil. Its type locality is Ampazony, which is in an Eocene peritidal claystone/mudstone in Madagascar.

Synonymy list
YearName and author
2009Eotheroides lambondrano Samonds and Zalmout p. 1235 figs. Figures 3-7

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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()
RankNameAuthor
infraorderCynodontia()
—Mammaliamorpha
—Mammaliaformes
classMammalia
—Theriamorpha(Rowe 1993)
—Theriiformes()
—Trechnotheria
—Cladotheria
—Zatheria
subclassTribosphenida()
subclassTheria
—Eutheria()
—Placentalia
—AfrotheriaStanhope et al. 1998
—Tethytheria
orderSirenia()
familyDugongidae
genusEotheroides
specieslambondrano

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.

†Eotheroides lambondrano Samonds and Zalmout 2009
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Diagnosis
ReferenceDiagnosis
K. E. Samonds and I. S. Zalmout 2009Diagnosis—Differs from all known species of Eotheroides in
possessing long and narrow nasals (180-210% longer than wide),
well developed supraorbital process with distinct flared ledge
superiorly and depressed dorsal surface, anteroposteriorly short
zygomatic-orbital bridge of maxilla, short infraorbital canal,
strongly bell-shaped maxillary dental arcade, primitive dental formula
of 3.1.5.3, and relatively large occlusal area of M2 and M3.
Shares with other species of genus banana-shaped, pachyosteosclerotic
ribs, premaxillary-maxillary suture below the premaxillary
symphysis, and temporal portion of periotic smaller than
the mastoid portion. Resembles E. aegyptiacum in having nasals
joined along midline and possessing three-rooted DP5 that is
retained and not replaced, but differs in having narrow palate,
longer and narrower nasals, and nasal processes of the premaxillae
that extend posteriorly more than one-third of the anteroposterior
length of the supraorbital process. Further differs from E. babiae
in possessing shorter parietals and a larger supraoccipital.