Mamíferos Marinos
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MAMÍFEROS MARINOS
11% de endemismo
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ORDEN CARNIVORA
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Familia Otaridae
de oreja pequeña
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Arctocephalus australis Lobo fino asutral arctocephalus “cabeza de oso”
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Otaria flavescensLobo marino de un pelo otaria =oreja pequeñaflavescens=amarillo
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Familia Phocidae
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Lobodon carcinophagus Foca cangrejera TA
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Hydrurga leptonyx Foca leopardo TA
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Mirounga leonina Elefante marino del sur CITES
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Orden Cetacea=gran animal marino"
•Adaptados a la vida acuática.•Cuerpo hidrodinámico y fusiforme.•Extremidades superiores = aletas.•Extremidades inferiores ausentes.•Desarrollo de cola.•Piel sin pelo, gruesa y lisa.•Alargamiento de los huesos faciales•(maxilar y premaxilar) y disminución de los nasales.•Telescopización.
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Suborden odontocetis = cetáceos con dientes
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Familia Zhiphiidae
iphos (espada), y por ello, literalmente zifio significa ballena con nariz de espada
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Zhiphius cavirostrisBallena picuda de Cuvier DD
Ostris =pico
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Hyperoodon planifrons Ballenas nariz de botella del sur LR
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Familia Physeterida
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Physeter macrocephalusCachalote gigante VU
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Familia Kogidae
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Kogia breviceps Cachalote enano de cabeza corta LR
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Cachalotes
Cabeza muy grande en proporción al cuerpo cuadrangular y mandíbula larga y angosta. Cetáceos dentados más grandes y con el mayor grado de dimorfismo sexual. Tienen una pequeña protuberancia a manera de aleta seguida de una serie de granulaciones. El espiráculo se ubica en la parte frontal izquierda de la cabeza. Son grandes buceadores pudiendo llegar a 3 mil metros de profundidad.
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Familia Delphinidae
•Talla pequeña a mediana•Alcanzan longitudes hasta 10 m•Surco entre pico y resto de la•cabeza•Piezas dentales desde 4 a 120
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Delphinus delphis Delfín común de hocico corto LR
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Grampus griseus Falso Calderon DD
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Lagenorhynchus australis Delfin austral Vu tengo confusin con este
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Lagenorhynchus obscurus Delfin oscuro DD
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Cephalorhynchus eutropia Tonina negra Endemica CR
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Orcinus orca Orca común Lr
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Pseudorca crassidens Falsa orca LR
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Suborden Mysticeti = cetáceos con barba
mystax (bigote) y cetus (cetáceo), es decir, cetáceos barbados
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Familia balaenopteridae
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Balaenoptera acutorostrata Ballena Minke LR
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Balaenoptera borealis Rorcual boreal EN
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Balaenoptera musculus Ballena azul EN
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Balaenoptera physalus Rorcual de aleta EN
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Megaptera novaeangliaeBallena Jorobada Vu
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Familia Balaenidaeballenas verdaderas
•Cuerpo robusto•Carecen de aleta dorsal•Más lentas que otras ballenas•Cuentan con las barbas más largas de las cuatro familias de misticetos•Boca arqueada•Cabeza ocupa una gran proporción del largo corporal•Sin pliegues gulares•Frecuentemente incrustaciones cirripedios en la piel
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Eubalaena glacialis Ballena Franca austral LR
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