"Sedentary" polychaetes of the Livingston Island shelf (South Shetlands, Antarctica), with the description of a new species

Polar Biology ◽  
1997 ◽  
Vol 17 (6) ◽  
pp. 502-514 ◽  
Author(s):  
Julio Parapar ◽  
Guillermo San Martín
Keyword(s):  
New Species ◽  
Livingston Island ◽  
South Shetlands ◽  
A New Species ◽  
Island Shelf

A new species of Ammothea and other pycnogonids from around Livingston Island, South Shetland Islands, Antarctica

2000 ◽  
Vol 12 (1) ◽  
pp. 47-51 ◽  
Author(s):  
Tomás Munilla León
Keyword(s):  
New Species ◽  
Abundant Species ◽  
South Shetland Islands ◽  
Similar Species ◽  
Shetland Islands ◽  
Livingston Island ◽  
The Family ◽  
A New Species

Specimens of 22 species of pycnogonids belonging to twelve genera and seven families were collected during a cruise near Livingston Island, South Shetland Islands. Twenty two of the 94 stations yielded pycnogonids: the new species Ammothea hesperidensis is described fully, illustrated, and compared with similar species. The family Nymphonidae provided both the greatest diversity of species (seven) and number of specimens (35). The most abundant species were Achelia hoekii and Nymphon australe.

A new species of Ammothea (Pycnogonida) and other pycnogonids from Livingston Island and surrounding waters (South Shetland Islands, Antarctica)

2001 ◽  
Vol 13 (2) ◽  
pp. 144-149 ◽  
Author(s):  
Tomás Munilla León
Keyword(s):  
New Species ◽  
Abundant Species ◽  
South Shetland Islands ◽  
Similar Species ◽  
Depth Range ◽  
Shetland Islands ◽  
West Antarctic ◽  
Livingston Island ◽  
The Family ◽  
A New Species

Fifty-nine species of pycnogonids belonging to sixteen genera and eight families were collected during a cruise near Livingston Island and surrounding waters, from depths between 0 and 1019 m. The new species Ammothea bentartica is described fully, illustrated and compared with similar species. The family Nymphonidae had both the greatest number of species (20) and number of specimens (67% of 1201). The most abundant species were Nymphon charcoti and N. australe. Nymphon paucidens and Pallenopsis buphtalmus were collected for a second time. The collections increased the geographical distribution of five species and the depth range of seven species. This collection appears typical of the West Antarctic zone.

A new species of Antarctoxylon: a contribution to the early angiosperm ecosystem of Antarctica during the late Cretaceous

2013 ◽  
Vol 26 (4) ◽  
pp. 371-376 ◽  
Author(s):  
Jakub Sakala ◽  
Radek Vodrážka
Keyword(s):  
New Species ◽  
Late Cretaceous ◽  
Growth Ring ◽  
Unique Combination ◽  
Early Angiosperm ◽  
Livingston Island ◽  
Lake Formation ◽  
James Ross Island ◽  
Perforation Plates ◽  
A New Species

AbstractA new species of Antarctoxylon is described from the Coniacian Hidden Lake Formation of James Ross Island as A. mixai Sakala, sp. nov. This angiosperm fossil wood shows a unique combination of features in having indistinct growth ring boundaries, scalariform perforation plates with about 30 bars and rays both narrow (1–6-seriate) and very wide (up to 18-seriate). Its systematic affinities and exact living relative at the specific, generic or even familial level cannot be specified. Along with Weinmannioxylon nordenskjoeldii from James Ross Island and the angiosperm woods from the Williams Point on Livingston Island, this record provides further evidence of the earliest record of arboreal angiosperms in Antarctica.

A new species of Nagumoea (Bacillariophyta) from Antarctica, and a further consideration of the systematic position of the genus

Phytotaxa ◽  
2018 ◽  
Vol 349 (2) ◽  
pp. 152 ◽  
Author(s):  
BART VAN DE VIJVER ◽  
J. PATRICK KOCIOLEK
Keyword(s):  
New Species ◽  
Systematic Position ◽  
South Shetland Islands ◽  
Diatom Species ◽  
Maritime Antarctic ◽  
Morphological Comparison ◽  
Shetland Islands ◽  
Livingston Island ◽  
A New Species ◽  
Scanning Electron

Nagumoea livingstonensis sp. nov., a new diatom species is described from a coastal pool on the Maritime Antarctic Livingston Island, South Shetland Islands, based on light and scanning electron microscopy observations. A morphological comparison is made with the two other known Nagumoea taxa. The new species can be separated by the clear hyaline line between the valve face and mantle areolae, differences in the structure of its a scalariform valvocopula and broader fibulae.                The taxonomic position of the genus Nagumoea is discussed. A placement within the Rhopalodiales is doubtful based on the absence of clover-shaped areolae coverings in Nagumoea making the order of Bacillariales a more probable position.

A new species of the genus Porpidia from Antarctica

2011 ◽  
Vol 43 (4) ◽  
pp. 367-371 ◽  
Author(s):  
Piotr OSYCZKA ◽  
Maria OLECH
Keyword(s):  
New Species ◽  
Endemic Species ◽  
The Arctic ◽  
Maritime Antarctic ◽  
The South ◽  
Secondary Products ◽  
South Shetlands ◽  
A New Species

AbstractTo date, there have only been two endemic species of the lichen genus Porpidia known from the maritime Antarctic. A new endemic species, Porpidia submelinodes Osyczka & Olech, recognized in the South Shetlands and South Orkneys, is described in this paper. The species is primarily characterized by its rusty orange, sorediate thallus, composed of convex, well separated and rounded areoles, and by the absence of lichen secondary products detectable by TLC. The morphology and soralia of this new species correspond to the arctic-alpine and boreal-mountain lichen Porpidia melinodes. The paper also discusses the differences between these two taxa and all Porpidia species reported from Antarctica.

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