Chile, Tierra del Fuego Archipelago, Isla Wollaston, Strait of Magellan Coast

2021 ◽  
Vol 100 (sp1) ◽  
Author(s):  
Charles W. Finkl ◽  
Christopher Makowski
Keyword(s):  
Tierra Del Fuego ◽  
Strait Of Magellan

Two new species of Psolus Oken from Brazil (Holothuroidea: Psolidae), with neotype designation and redescription of Psolus vitoriae Tommasi, 1971, and a key to the southwestern Atlantic and Magellanic species

Zootaxa ◽  
2019 ◽  
Vol 4563 (3) ◽  
pp. 531 ◽  
Author(s):  
LUCIANA MARTINS ◽  
MARCOS TAVARES
Keyword(s):  
New Species ◽  
New Zealand ◽  
Variable Number ◽  
Tierra Del Fuego ◽  
Southwestern Atlantic ◽  
Perforated Plates ◽  
Macquarie Island ◽  
Strait Of Magellan ◽  
Two New Species ◽  
Calcareous Ring

The taxonomy of the southeastern Brazilian species of Psolus is reviewed and two new species described. Additionally, P. vitoriae is redescribed based on a newly designated neotype and supplemental material from the type locality and nearby regions. The synonymy of P. marcusi with P. patagonicus is called into question. The calcareous ring is useful for distinguishing between some Psolus species. Psolus tommasi sp. nov. is characterized by having five oral valves, an anus covered by a variable number of small, irregular anal valves, oral and anal valves distinct from body wall scales, calcareous ring interradial plates entire, calcareous ring simple, without posterior processes; radial and interradial plates entire, dorsal ossicles spheroid bodies and sole ossicles knobbed and smooth perforated plates. Psolus thandari sp. nov. is characterized by granules on body scales; mouth surrounded by five to seven triangular valves of equal size; anus surrounded by a variable number of small and irregular anal valves that grade into surrounding scales; calcareous ring with interradial plates entire. Six species of Psolus are known from the southwestern Atlantic and Magellanic region: P. vitoriae (São Paulo, Brazil); P. patagonicus (Mar del Plata to Tierra del Fuego, Argentina; Strait of Magellan and Cape Horn); P. segregatus (Patagonia, Argentina; Strait of Magellan, Chile; Hikurangi Margin and Chatham Rise, New Zealand); P. antarcticus (Magellanic region; South Georgia Island, southern Atlantic Ocean; Macquarie Island and Ridge, New Zealand); P. lawrencei (Mar del Plata, Argentina) and Psolus murrayi Théel, 1886 (Montevideo, Uruguay). A key to the species of Psolus from the southwestern Atlantic and Magellanic region, and a synoptic table to all southern Atlantic Psolus species is provided. 

scholarly journals The depth distribution of recent marine Ostracoda from the southern Strait of Magellan

1997 ◽  
Vol 16 (2) ◽  
pp. 121-130 ◽  
Author(s):  
R. C. Whatley ◽  
M. Staunton ◽  
R. L. Kaesler
Keyword(s):  
Deep Water ◽  
Depth Distribution ◽  
Water Masses ◽  
Cold Temperature ◽  
Tierra Del Fuego ◽  
Sediment Samples ◽  
Low Salinity ◽  
Strait Of Magellan ◽  
The Strait Of Magellan

Abstract. From 16 sediment samples collected from the Chilean part of the Strait of Magellan, 2338 Ostracoda were recovered. These represent 61 species belonging to 45 genera and 16 families. Previous work in the Tierra del Fuego Province has shown the faunas to be highly endemic, resulting from the relative isolation of the region and its particular climatic and oceanographical characteristics. The fauna of the Strait of Magellan is similar to those previously described with one notable exception: the occurrence of deep-water, psychrospheric species at shallow depths. Species of Bradleya, Agrenocythere, Poseidonamicus, Bythoceratina, and Legitimocythere, usually recorded from bathyal to abyssal depths of more than 1000 m, were found together in the same samples with a typical, shelf fauna. Such unusual depth distribution of psychrospheric species may have resulted from the extremely cold temperature and low salinity of the water in the southern Strait of Magellan, coupled with the upwelling of cold, deep water masses.

STOMACH CONTENTS OF FALSE KILLER WHALES (PSEUDORCA CRASSIDENS) STRANDED ON THE COASTS OF THE STRAIT OF MAGELLAN, TIERRA DEL FUEGO

1999 ◽  
Vol 15 (3) ◽  
pp. 712-724 ◽  
Author(s):  
Mariano Koen Alonso ◽  
Susana N. Pedraza ◽  
Adrian C. M. Schiavini ◽  
R. NATALIE P. Goodall ◽  
Enrique A. Crespo
Keyword(s):  
Stomach Contents ◽  
Tierra Del Fuego ◽  
Killer Whales ◽  
Strait Of Magellan ◽  
The Strait Of Magellan ◽  
Pseudorca Crassidens

THE GREAT PATAGONIAN OIL SPILL (METULA), 41 YEARS LATER

2017 ◽  
Vol 2017 (1) ◽  
pp. 515-535 ◽  
Author(s):  
Erich R. Gundlach
Keyword(s):  
Oil Spill ◽  
High Tide ◽  
Wide Band ◽  
High Viscosity ◽  
Tierra Del Fuego ◽  
Strait Of Magellan ◽  
The Strait Of Magellan ◽  
Sand And Gravel ◽  
Very High

ABSTRACT: 2017-300 On 9 August 1974, the supertanker VLCC Metula spilled over 50,000 tons of Saudi Arabian crude oil and 2000 tons of bunker oil into the eastern portion of the Strait of Magellan in southern Chile. Oil spread over 200 km of glacially derived shorelines primarily composed of mixed sand and gravel to boulder-sized material. No cleanup was performed. Initial and follow-up investigators from Chile, U.S., U.K. and Canada reported on oiled shoreline conditions and spill persistence through 2005. This report extends the analysis to February 2015 for the primary areas noted as having remaining oil, i.e. within Puerto Espora behind Espora spit and the sheltered East Espora Marsh. Both are located along the First Narrows on the Tierra del Fuego side of the Strait. Comparisons are made to previous site visits in 1975–76, 1981 and 1995. Conditions at Puerto Espora historically showed a wide band of thick asphalted gravel pavement in a slow process of breakup. This area in 2015 has been further degraded by physical processes but mineralized asphalt remnants are still evident over a discontinuous length of 180 m (maximums: width = 8 m, thickness = 10 cm). In East Espora Marsh, oil initially entered during a very high tide such that oil settled on to channel banks and upper areas dominated by salt-tolerant plants (Salicornia, Puccinellia and Sueda). In 2015, oil remains very much in evidence as weathered asphalt in thin deposits, as a high viscosity black oil with underlying brown mousse common in thicker (>4 cm) deposits, and as oil buried up to 10 cm below a layer of fine silt/clay. Vegetation has recovered to an estimated 75% in interior marsh areas and to ~35% in the outer marsh located at the entry to the marsh. The Metula site remains of great scientific interest in terms of oil spill persistence in a cool dry environment that may be compared to other high latitude habitats such as found in the newly opening Arctic Ocean area.

Los curculionoidea (Insecta: coleoptera) de la Tierra del Fuego e Islas Malvinas

2002 ◽  
Author(s):  
◽  
Paula Elena Posadas
Keyword(s):  
Tierra Del Fuego ◽  
Siglo Xix ◽  
América Del Sur ◽  
Islas Malvinas ◽  
Siglo Xx

En 1964 el botánico franco-italiano Léon Croizat visualizó a la diversidad biológica como un hecho histórico que transcurre en tres dimensiones: forma espacio y tiempo. En este contexto, la diversidad biológica se comprende como el resultado de la historia de la vida sobre la Tierra, expresada en los cambios de forma a través del tiempo. Esta visión de Croizat ha sido el tema unificador de la biología comparada. Dentro de ella, dos disciplinas vinculadas, la biogeografía y la sistemática, enfatizan respectivamente los conceptos de espacio y forma. Ambas son fundamentales para abordar el estudio de la biodiversidad desde un enfoque integral. Consecuentemente, el objetivo principal de este trabajo de tesis es estudiar en forma integral la curculiofauna de los archipiélagos de Islas Malvinas y Tierra del Fuego. Los Curculionoidea (comúnmente denominados “gorgojos”) constituyen la superfamilia más diversa de seres vivos, con más de 57.000 especies agrupadas en 6000 géneros. Su distribución actual se extiende desde el Ártico hasta las regiones subantárticas, y sus representantes se encuentran en todos los continentes e islas, excepto la Antártida. Los estudios sistemáticos de la curculiofauna sudamericana llevados a cabo durante el siglo XIX por autores como Blanchard, Fairmaire, Germain, Guérin-Méneville y Philippi entre otros, resultaron en la descripción de numerosos géneros y especies. Durante el siglo XX la curculiofauna patagónica fue estudiada por diversos autores (e.g., Bruch, Champion, Elgueta, Enderlein, Hustache, Kuschel, Marvaldi, Morrone) con relación a sus aspectos sistemáticos no filogenéticos. Hacia fines del siglo XX aparecieron numerosas contribuciones al conocimiento de la filogenia de los curculiónidos patagónicos, en especial dentro de las Cyclominae (Curculionoidea: Curculionidae). Esta subfamilia junto con Entiminae comprenden más del 60% de las especies de la curculiofauna de América del Sur austral. En cuanto a los curculionoideos de los archipiélagos de Tierra del Fuego e Islas Malvinas en particular, sólo se han realizado inventarios parciales.

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