Eotheroides lambondrano, New Middle Eocene Seacow (Mammalia, Sirenia) from the Mahajanga Basin, Northwestern Madagascar

  title={Eotheroides lambondrano, New Middle Eocene Seacow (Mammalia, Sirenia) from the Mahajanga Basin, Northwestern Madagascar},
  author={Karen E. Samonds and Iyad S. Zalmout and Mitchell T. Irwin and David W. Krause and Raymond R. Rogers and Lydia L. Raharivony},
ABSTRACT The first diagnostic sirenian material from Madagascar and, more broadly, the first diagnostic pre-Pleistocene Cenozoic mammal material recovered from the island is reported. Eotheroides lambondrano is a new species of sirenian collected from middle Eocene nearshore marine deposits in the Mahajanga Basin of northwestern Madagascar. The recovered material consists of a nearly complete adult skull (including the first complete rostrum known for Eotheroides) and several portions of… 

First adequately-known quadrupedal sirenian from Eurasia (Eocene, Bay of Biscay, Huesca, northeastern Spain)

Sirenians are the only extant herbivorous mammals fully adapted to an aquatic lifestyle and Sobrarbesiren is recovered as the sister taxon of Dugongidae and represents a transitional stage of adaptation to aquatic life between the amphibious quadrupedAL prorastomids and the aquatic quadrupedal protosirenids.

Gondwanatheria and ?Multituberculata (Mammalia) from the Late Cretaceous of Madagascar

Five new specimens from the Late Cretaceous of Madagascar, including a virtually complete lower molariform cheek tooth, two fragmentary cheek teeth, and a fragmentary lower incisor are referred to the Sudamericidae (Gondwanatheria).

Sokatra, a New Side-Necked Turtle (Late Cretaceous, Madagascar) and the Diversification of the Main Groups of Pelomedusoides

The deep phylogenetic roots of Sokatra indicates the presence of its lineage on Madagascar prior to the beginning of the Late Cretaceous.

New Miocene sirenians from Nosy Makamby, northwestern Madagascar

ABSTRACT The near lack of vertebrate fossils from the Cenozoic of Madagascar has left many of the details regarding the origin and evolution of the island’s extant faunas unknown. However, recent

Cranial Remain from Tunisia Provides New Clues for the Origin and Evolution of Sirenia (Mammalia, Afrotheria) in Africa

X-ray microtomography is used to investigate a newly discovered sirenian petrosal from the Eocene of Tunisia, which represents the oldest occurrence of sirenians in Africa and supports their African origin.

The most northerly record of the sirenian Protosiren and the possible polyphyletic evolution of manatees and dugongs

Newly discovered remains of the early Middle Eocene (Lutetian) sirenian Protosiren (Protosirenidae) in shark tooth rich conglomerates from a coastal delta environment northwest of the European

A middle - late Eocene neoselachian assemblage from nearshore marine deposits, Mahajanga Basin, northwestern Madagascar

This fauna represents the first Cenozoic neoselachian fossil record from the Eocene of Madagascar and broadens the understanding of their evolutionary and biogeographic history in the southern hemisphere during this time.

An early Miocene dugongine (Sirenia: Dugongidae) from Panama

ABSTRACT Herein, we describe a new early Miocene dugongine from marine deposits of the Culebra Cut (Gaillard Cut) of the Panama Canal. The new taxon, Culebratherium alemani, gen. et sp. nov.,



New Species of Protosiren (Mammalia, Sirenia) from the Early Middle Eocene of Balochistan (Pakistan)

Protosiren eothene is the oldest and smallest species of Protosiren known to date and retains synovial articulations on rib heads, and it is about 10-12% smaller in linear dimensions than P. fraasi from the early middle Eocene of Egypt.


Abstract Discoveries of three species of Eocene sirenians in District Kachchh, State of Gujarat, India, are reported. A species of the protosirenid Protosiren is represented by cranial and

On Fossil Evidences of a Sirenian Mammal (Eotherium ægyptiacum, Owen) from the Nummulitic Eocene of the Mokattam Cliffs, near Cairo

  • Owen
  • Geology
    Quarterly Journal of the Geological Society of London
  • 1875
The evidence of the Sirenian mammal now submitted to the Society is from the white, compact, fine-grained, calcareous stone of the Nummulitic Eocene Tertiary period, now quarried extensively in the


Current available geologic and paleontologic data are most consistent with the Africa-first model, suggesting that Africa was the first of the major Gondwanan landmasses to be fully isolated prior to the Albian/Cenomanian boundary, and that its terrestrial vertebrate faunas became progressively more provincial during the Cretaceous, while those on other Gondwana landmassed remained relatively cosmopolitan until the later stages of the Late Cret Jurassic.

A Small Collection of Fossil Vertebrates from the Middle Eocene Kuldana and Kohat Formations of Punjab (Pakistan)

Discovery of a small concentration of mammal specimens at one locality suggests that there is very good potential for the discovery of additional middle Eocene mammals in the Kuldana Formation and its lateral equivalents.

A New Early Oligocene Dugongid (Mammalia, Sirenia) from Fayum Province, Egypt

Eosiren imenti, new species, is described on the basis of a cranium from the early Oligocene Gebel Qatrani Formation in Fayum Province, Egypt. The new species is similar to, but more derived than,

Asynchronous colonization of Madagascar by the four endemic clades of primates, tenrecs, carnivores, and rodents as inferred from nuclear genes.

A simultaneous reconstruction of phylogeny and age of the four radiations based on a 3.5-kb data set from three nuclear genes supports each as a monophyletic clade, sister to African taxa, and thereby identifies four events of colonization out of Africa.

Catalogus Mammalium tam viventium quam fossilium

A new catalogue of Mammals is much wanted, and will be of great use to the many workers in that group of animals, although the work appears to have been performed in a satisfactory manner, though it would not be difficult to point out a certain number of slips and errors.

II.—Preliminary Note on some Recently Discovered Extinct Vertebrates from Egypt. (Part II.)

In the lower beds remains of a Sirenian are very common, and several more or less complete skulls associated with some portions of the skeleton were found. The skull in most respects resembles that

The Natural History of Madagascar

Separated from the mainland of Africa for 160 million years, Madagascar has evolved an incredible wealth of biodiversity, with thousands of species that can be found nowhere else on earth. For