- Description
The tail fluke of a dugong is notched and similar to those of dolphins, whereas the tail fluke of manatee is paddle-shaped. The fluke is pumped up and down in long strokes to move the animal forward, or twisted to t… See more
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- 50-million-year-oldSirenia is the order of placental mammals which comprises modern "sea cows" (manatees and the Dugong) and their extinct relatives. They are the only extant herbivorous marine mammals and the only group of herbivorous mammals to have become completely aquatic. Sirenians are thought to have a 50-million-year-old fossil record (early Eocene -recent).
en.wikipedia.org/wiki/Evolution_of_sirenians - People also ask
Evolution of sirenians - Wikipedia
Sirenia is the order of placental mammals which comprises modern "sea cows" (manatees and the Dugong) and their extinct relatives. They are the only extant herbivorous marine mammals and the only group of herbivorous mammals to have become completely aquatic. Sirenians are thought to have a 50-million-year-old fossil record (early Eocene-recent). They attained modest diversity duri…
Wikipedia · Text under CC-BY-SA license- Estimated Reading Time: 7 mins
First adequately-known quadrupedal sirenian from Eurasia
WEBMar 23, 2018 — Sirenians originated from an undetermined clade of afrotherian mammals in the Paleocene 1. The fossil record of the group starts in the late early Eocene of the …
- Author: Ester Díaz-Berenguer, Ainara Badiola, Miguel Moreno-Azanza, José Ignacio Canudo
- Publish Year: 2018
The earliest known fully quadrupedal sirenian | Nature
WEBOct 11, 2001 — Here I describe Eocene fossils from Jamaica that represent nearly the entire skeleton of a new genus and species of sirenian—the most primitive for which …
- Author: D. P. Domning
- Email: [email protected]
- Publish Year: 2001
Sirenian Evolution - ScienceDirect
WEBJan 1, 2018 — Learn about the fossil history and diversity of dugongs, manatees, and their extinct relatives from the Eocene to the present. See figures and descriptions of …
Total evidence time-scaled phylogenetic and biogeographic …
WEBAug 25, 2022 — In an effort to address these issues, here we present a total evidence phylogenetic analysis of Sirenia that includes living and fossil species and applies …
Evolution of marine mammals: Back to the sea after …
WEBMay 21, 2007 — Mammals in particular have returned to the water in at least seven separate lineages (Cetacea, Sirenia, Desmostylia, Pinnipedia, Ursus maritimus [polar bear], Enhydra lutris [sea otter], and Thalassocnus spp. …
The earliest known fully quadrupedal sirenian - PubMed
WEBOct 11, 2001 — Here I describe Eocene fossils from Jamaica that represent nearly the entire skeleton of a new genus and species of sirenian--the most primitive for which extensive …
Cranial Remain from Tunisia Provides New Clues for …
WEBJan 16, 2013 — So far, the historical biogeography of early Sirenia has remained obscure given this paradox between phylogeny and fossil record. Here we use X-ray microtomography to investigate a newly discovered …
New Research Tracks Evolution of Sea Cows | Sci.News
WEBAug 25, 2022 — Total evidence time-scaled phylogenetic and biogeographic models for the evolution of sea cows (Sirenia, Afrotheria). PeerJ 10: e13886; doi: 10.7717/peerj.13886. The sea cows originated in the Tethys …
Iterative Evolution of Sympatric Seacow (Dugongidae, Sirenia
WEBFeb 3, 2012 — Fossil sirenian occurrences occasionally are monotypic, but the assemblages analyzed herein show iterative evolution of multispecies communities, a phenomenon unparalleled in extant sirenian ecology.
Evolution of the Brain and Sensory Structures in Sirenia
WEBNov 22, 2022 — This chapter reviews the paleoneurology of sirenians, a group of aquatic mammals with a rich fossil record. It describes the anatomy and evolution of their …
Protosiren - Wikipedia
WEBProtosiren is an extinct early genus of the order Sirenia. Protosiren existed throughout the Lutetian to Priabonian stages of the Middle Eocene.
Sirenia (Dugongs, Sea Cows, and Manatees) - Encyclopedia.com
WEBLearn about the sirenians, the only fully aquatic, herbivorous marine mammals, and their evolution from primitive hoofed mammals. Explore their fossil record, distribution, …
Considerations on the Portuguese Sirenia (Mammalia) fossil …
WEBAug 16, 2023 — The Portuguese Sirenia fossil record supports the present interpretation that sirenians took refuge in the Mediterranean and Gulf of Cadiz by the end of the …
Sirenia - an overview | ScienceDirect Topics
WEBSirenians have a known fossil record extending over some 50 million years. Only two genera and four species survive today: the three species of manatees live along the …
Learn About the Sirenians - ThoughtCo
WEBJul 28, 2019 — As many as 50 species of fossil sirenians have been identified. The closest living relative to sirenians are the elephants. The primary predators of sirenians are …
Fossil Sirenians Give Scientists New Look at Ancient Climate
WEBApr 21, 2011 — The Sirenia, named for the sirens or mermaids of Greek myth, is an order of aquatic, plant-eating mammals that live in swamps, rivers, estuaries, marine wetlands …
Sirenia
WEBFossil sirenia of the West Atlantic and Caribbean Region. Journal of Vertebrate Paleontology 10:361-371. Domning, D. P. 1994. A phylogenetic analysis of the Sirenia. …
Sea Monsters in the Desert? Remains of Cuddly Sea Cow …
WEBOct 20, 2020 — Top image: A Sirenia fossil, related to the modern-day sea cow, has been discovered in the Egyptian desert, proving that these peaceful marine creatures once …
Total evidence time-scaled phylogenetic and biogeographic
WEBMay 27, 2022 — In an effort to address these issues, here we present a total evidence phylogenetic analysis of Sirenia that includes living and fossil species and applies …
Adorable ancient sea cows once swam through now-bone dry …
WEBOct 14, 2020 — Scientists found the Sirenia fossils, including some of the creature's vertebrae, ribs and limb bones, in 2019.
Strontium isotope chronostratigraphic age of a sirenian fossil site …
WEBFossils in the order Sirenia (family Dugongidae) from Santa Rosa Island, part of Channel Islands National Park in southern California, provide rare temporal and spatial links …
