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Plesiopharos

From Wikipedia, the free encyclopedia
Extinct genus of plesiosaurs

Plesiopharos
Temporal range:Early Jurassic,197–193 Ma
Fossils
Scientific classificationEdit this classification
Kingdom:Animalia
Phylum:Chordata
Class:Reptilia
Superorder:Sauropterygia
Order:Plesiosauria
Superfamily:Plesiosauroidea (?)
Genus:Plesiopharos
Puértolas-Pascualet al., 2021
Species:
P. moelensis
Binomial name
Plesiopharos moelensis
Puértolas-Pascualet al., 2021

Plesiopharos (derived from the Greek words πλησίος (plesios), "close" and φάρος (pharos), "lighthouse", because itsholotype was found in the vicinity of a lighthouse + [from São Pedro de] Moel) is an extinct genus ofplesiosaur from theEarly JurassicCoimbra Formation ofPortugal. Specifically, it was discovered in São Pedro de Moel, Marinha Grande, from which the type species' binomial name,Plesiopharos moelensis, derives from.

At the time of its publication (2021), this plesiosaur was the most complete and oldest known from theIberian Peninsula.[1]

Discovery

[edit]
Known elements

The fossils were found by two collectors, António Silva (1999) and Vítor Teixeira (2012) who donated them to the Lourinhã Museum in 2017, and were completely prepared in the Dino Parque laboratory.[1]

Description

[edit]

ThePlesiopharos holotype (ML 2302) consists of parts of the fin of the arm (humerus and radius), of the right leg (femur), pelvic girdle (pubis, ilium and ischium) of the thorax (vertebrae, ribs and gastralia) and of the neck (cervical vertebra).[1] It would be an adult animal with an estimated size between 2.5 and 2.8 m.[citation needed]

Classification

[edit]

Plesiopharos moelensis is classified as a basal member ofPlesiosauroidea.[1]

Paleoenvironment

[edit]
Life restoration

Plesiopharos moelensis was discovered at Praia da Concha, São Pedro de Moel, Marinha Grande, in layers that belong to theCoimbra Formation, which date to theSinemurian.[2][3]

References

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  1. ^abcdPuértolas-Pascual, Eduardo; Marx, Miguel; Mateus, Octávio; Saleiro, André; Fernandes, Alexandra E.; Marinheiro, João; Tomás, Carla & Mateus, Simão (2021). "A new plesiosaur from the Lower Jurassic of Portugal and the early radiation of Plesiosauroidea".Acta Palaeontologica Polonica.66 (in press).doi:10.4202/app.00815.2020.hdl:10362/123694.
  2. ^Duarte, L.V., Silva, R., Duarte, C.B., Azerêdo, A.C., and Comas Rengifo, M.J. 2008. Litostratigrafia do Jurássico Inferior da região de S. Pedro de Moel (Bacia Lusitânica, Portugal). In: P.M. Callapez (ed.), A Terra, Conflitos e Ordem. Homenagem ao Professor Ferreira Soares, 175– 185. Museu e Laboratório de Mineralogia e Geologia da Universidade de Coimbra, Coimbra.
  3. ^Duarte, L.V., Comas-Rengifo, M.J., Silva, R.L., Paredes, R., and Goy, A. 2014. Carbon isotope stratigraphy and ammonite biochronostratigraphy across the Sinemurian–Pliensbachian boundary in the western Iberian margin. Bulletin of Geosciences 89: 719–736.
Sauropsida
Sauropterygia
    • see below↓
Helveticosauridae?
Saurosphargidae
Placodontia
Cyamodontoidea
Eosauropterygia
    • see below↓
Helveticosaurus zollingeriPlacochelys placodonta
Pachypleurosauria
Nothosauroidea
Simosauridae
Nothosauria
Pistosauroidea
Plesiosauria
    • see below↓
Keichousaurus hui

Nothosaurus mirabilis

Pistosaurus longaevus
Rhomaleosauridae
Pliosauridae
Thalassophonea
Brachaucheninae
Plesiosauroidea
Microcleididae
Cryptoclidia
    • see below↓
Macroplata tenuiceps

Attenborosaurus conybeari

Hydrorion brachypterygius
Cryptoclididae
Colymbosaurinae
Cryptoclidinae
Muraenosaurinae
Leptocleidia
Leptocleididae
Polycotylidae
Palmulasaurinae
Occultonectia
Polycotylinae
Dolichorhynchia
Euelasmosaurida
Elasmosaurinae
Weddellonectia
Aristonectinae
Cryptoclidus eurymerus

Leptocleidus capensis

Elasmosaurus platyurus
Plesiopharos
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