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- 50 million yearsSirenia are the order of placental mammals comprising modern seacows (manatees and dugongs) and their extinct relatives. They are the only herbivorous marine mammals now living, and the only herbivorous mammals ever to have become totally aquatic. Sirenians have a known fossil record extending over some 50 million years (early Eocene–Recent).www.sciencedirect.com/science/article/pii/B9780128043271002296
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Trophic interactions of sharks and crocodylians with a sea cow …
The fossil site reported here is new, and vertebrate fossils from the Agua Clara Fm. were so far unknown, but caimanine remains from small to large-sized individuals have been found in …
Fossil Evidence Unveils Ancient Food Chain Drama: …
2 days ago · New research documents the predation of a Miocene-era sea cow by both a crocodile and a shark, revealing significant parallels in ancient and modern food chains and providing a rare glimpse into the complex ecological …
Sirenia - Wikipedia
Sirenia, commonly sirenians, are also referred to by the common name sirens, deriving from the sirens of Greek mythology.
Sirenians are classified within the cohort Afrotheria in the clade Paenungulata, alongside Proboscidea (elephants), Hyracoidea (hyraxes), Embrithopoda, Desmostylia, and Afroinsectiphilia. This clade was first established by George Gaylord Simpson in 1945 on the basis of anatomical …Wikipedia · Text under CC-BY-SA licenseEvolution 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
Mar 23, 2018 · New fossils of Sirenia from the middle Eocene of Navarre (Western Pyrenees): the oldest West European sea cow record. Geol. Mag. 147, 665–673 (2010).
The earliest known fully quadrupedal sirenian | Nature
Oct 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 …
Total evidence time-scaled phylogenetic and biogeographic …
Aug 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 Bayesian tip-dating …
Sirenian Evolution - ScienceDirect
Jan 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 sirenian anatomy, …
ADW: Sirenia: INFORMATION
The paleoecology of sirenians has been extensively studied, especially with regard to the Miocene and Oligocene when they were more diverse. Fossil records show a direct relationship between sirenian abundance and sea grass …
Sirenia (Dugongs, Sea Cows, and Manatees) | Encyclopedia.com
Learn about the sirenians, the only fully aquatic, herbivorous marine mammals, and their evolution from primitive hoofed mammals. Explore their fossil record, distribution, physical …
Sirenia - Tree of Life Web Project
Domning, D. P. 1990. Fossil 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.
Evolution of the Brain and Sensory Structures in Sirenia
Nov 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 endocasts, …
Learn About the Sirenians - ThoughtCo
Jul 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 humans. …
The earliest known fully quadrupedal sirenian - PubMed
Oct 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 …
Sirenian | Manatees, Dugongs & Sea Cows | Britannica
Jul 12, 2024 · Sirenian, (order Sirenia), any of four large aquatic mammalian species now living primarily in tropical waters where food plants grow. The three species of manatee (genus …
Sirenia - an overview | ScienceDirect Topics
Sirenians 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 Atlantic coasts and …
Sirenia - mindat.org
The Sirenia, commonly referred to as sea-cows or sirenians, are an order of fully aquatic, herbivorous mammals that inhabit swamps, rivers, estuaries, marine wetlands, and coastal …
Sirenia - Wikiwand / articles
Sirenians first appeared in the fossil record in the Early Eocene and diversified throughout the epoch. They inhabited rivers, estuaries, and nearshore marine waters. [26] Sirenians, unlike …
Sirenia - Oxford Reference
Fossil sirenians are known from the Eocene, in Egypt and Jamaica. Probably they first appeared in Africa, from the stock that also gave rise to the proboscideans; and the two surviving …
Evolution of marine mammals: Back to the sea after 300 million …
May 21, 2007 · Evolutionary highlights are presented, focusing on changes affecting the sensory systems, locomotion, breathing, feeding, and reproduction in Cetacea, Sirenia, Desmostylia, …
New fossils of Sirenia from the Middle Eocene of Navarre …
The morphology of the fossils is consistent with referral to Dugongidae, the only sirenian clade known so far in the Middle Eocene of Europe. Moreover, the histological study of the ribs …
New Research Tracks Evolution of Sea Cows | Sci.News
Aug 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 …
The Fossil Record of Sea Cows (Mammalia: Sirenia) in Greece
Dec 8, 2021 · Sea cows are a group of aquatic, mainly marine mammals (Mammalia: Sirenia), being common dwellers in shallow coastal and transitional environments of the former Tethys …
Protosiren - Wikipedia
Protosiren is an extinct early genus of the order Sirenia. Protosiren existed throughout the Lutetian to Priabonian stages of the Middle Eocene.
Strontium isotope chronostratigraphic age of a sirenian fossil site …
The purpose of this study is to determine a more precise age for the geologic strata hosting the sirenian fossils using marine bivalve and barnacle fossils from the same sedimentary …