Two new species of Paramunnidae (Crustacea, Isopoda, Asellota) from the South Shetland Islands

2004 ◽  
Vol 16 (3) ◽  
pp. 239-252 ◽  
Author(s):  
JOSÉ CASTELLÓ
Keyword(s):  
New Species ◽  
The Other ◽  
South Shetland Islands ◽  
The South ◽  
Shetland Islands ◽  
Two New Species ◽  
Lateral Margins

Two new species of Paramunnidae (Crustacea, Isopoda, Asellota) from the South Shetland Islands (sub-Antarctic) are described. Austrosignum escandellae sp. nov. has long eyestalks, dorsum slightly sculpted (transverse bumps on pereonites 1–5), and lateral margins of pereonites rounded. The closest species is A. spinosum Kussakin, 1982 that also shows dorsum sculpted. The main differences are the ocular peduncle (short in A. spinosum) and the lateral margins of pereonites (pointed in A. spinosum). Coulmannia ramosae sp. nov. differs from the other two species of this genus (C. australis Hodgson, 1910 and C. frigida Hodgson, 1910) in that only the margins of pereonites 2–4 are expanded (into one point). A discussion of the Austrosignum/Munnogonium complex is provided with a comparative table of the species involved.

Two new species of Dorymenia (Mollusca: Solenogastres: Proneomeniidae) from the South Shetland Islands (Antarctica)

2000 ◽  
Vol 80 (5) ◽  
pp. 835-842 ◽  
Author(s):  
O. García-Alvarez ◽  
V. Urgorri ◽  
L. von Salvini-Plawen
Keyword(s):  
New Species ◽  
Comparative Study ◽  
South Shetland Islands ◽  
The South ◽  
Shetland Islands ◽  
Bransfield Strait ◽  
Livingston Island ◽  
Two New Species ◽  
Antarctic Benthos

This paper describes two new species from the genus Dorymenia (Mollusca: Solenogastres: Proneomeniidae): D. hesperidesi sp. nov. and D. menchuescribanae sp. nov., collected during the Spanish oceanographic expeditions for the study of Antarctic benthos, BENTART'94 and BENTART'95, carried out in the area of the Livingston Island (South Shetland Islands, Antarctica). A comparative study of main specific characteristics of species belonging to the genus Dorymenia found off the South Shetland Islands and in the Bransfield Strait (Antarctica), is also included.

scholarly journals Massalongia olechiana (Massalongiaceae, Peltigerales), a new lichen species from the Antarctic

2011 ◽  
Vol 32 (2) ◽  
pp. 117-121 ◽  
Author(s):  
Vagn Alstrup ◽  
Ulrik Søchting
Keyword(s):  
New Species ◽  
Antarctic Peninsula ◽  
Lichen Species ◽  
The Other ◽  
The Arctic ◽  
South Shetland Islands ◽  
The South ◽  
Shetland Islands ◽  
The Antarctic ◽  
A New Species

Massalongia olechiana (Massalongiaceae, Peltigerales), a new lichen species from the Antarctic A new species of lichenized ascomycete, Massalongia olechiana Alstrup et Søchting, sp. nov. (Massalongiaceae) is described from the South Shetland Islands and the Antarctic Peninsula. The species is distinguished by laminal isidia and 5-7-septate ascospores. The relationships with the other species of the genus are discussed. From Massalongia carnosa, recorded from both the Arctic and the Antarctic, the new species is distinguished by its lack of isidioid squamules and in having pluriseptate ascospores instead of 1-septate ascospores.

Ten new Bacillariophyta species from James Ross Island and the South Shetland Islands (Maritime Antarctic Region)

Phytotaxa ◽  
2016 ◽  
Vol 272 (1) ◽  
pp. 37 ◽  
Author(s):  
RALITSA ZIDAROVA ◽  
KATEŘINA KOPALOVÁ ◽  
BART VAN DE VIJVER
Keyword(s):  
New Species ◽  
South Shetland Islands ◽  
Similar Species ◽  
Maritime Antarctic ◽  
The South ◽  
Antarctic Region ◽  
Shetland Islands ◽  
James Ross Island ◽  
The Antarctic

The present paper describes 10 new diatom (Bacillariophyta) species from the Maritime Antarctic Region. Five of the newly described taxa: Caloneis australis sp. nov., Mayamaea sweetloveana sp. nov., Navicula romanedwardii sp. nov., Sellaphora antarctica sp. nov. and Sellaphora gracillima sp. nov. have been previously reported from the Antarctic Region but were force-fitted into incorrect names. Five other taxa: Chamaepinnularia elliptica sp. nov., Cosmioneis regigeorgiensis sp. nov., Mayamaea tytgatiana sp. nov., Muelleria pimpireviana sp. nov. and Pinnularia pinseeliana sp. nov. are newly discovered taxa. The morphology of all new species is studied using both light and scanning electon microscope observations and compared with similar species from the Antarctic Region and worldwide. Data about the ecology and confirmed Antarctic distribution of the new species are added.

New species and a new genus of the Orthoseirales from Patagonia, Argentina, with comments on systematic affinities within the Order

Phytotaxa ◽  
2018 ◽  
Vol 345 (2) ◽  
pp. 119 ◽  
Author(s):  
J.M. GUERRERO ◽  
A.A VOUILLOUD ◽  
S.E. SALA ◽  
J.P. KOCIOLEK ◽  
B. VAN DE VIJVER
Keyword(s):  
Electron Microscope ◽  
New Species ◽  
New Genus ◽  
Type Material ◽  
South Shetland Islands ◽  
Unique Combination ◽  
The South ◽  
Shetland Islands ◽  
Original Illustrations ◽  
Single Genus

The presence of ‘carinoportulae’ was suggested to be diagnostic for the Order Orthoseirales and Family Orthoseiraceae. Members of this group have been assigned to a single genus, Orthoseira Thwaites, which was diagnosed by also lacking rimoportulae. The genus Cavernosa Stidolph is chain-forming, may have marginal spines, lacks carinoportulae and possesses rimoportulae. Its placement among other members of melosiroid diatoms has not been settled, though its lack of carinoportulae precludes its placement within the Orthoseirales. Species of both genera were described from aerophilous habitats.         Recently Orthoseira limnopolarensis Van de Vijver and Crawford was described from the South Shetland Islands (maritime region of Antarctica) with a unique combination of features, as it possesses carinoportulae and rimoportulae, the first species of the genus with this suite of characters. Cyclotella stipata Frenguelli, described from Neuquén Province, Argentina, is a species that according to the original illustrations shows characters similar to Orthoseira. Light and electron microscope observations of Frenguelli´s type material and more recent collections from Patagonia offer specimens with an elongated mantle, chain-forming frustules with thick marginal spines and presence of carinoportulae (like Orthoseira) and rimoportulae (like Cavernosa and O. limnopolarensis). Considering this unique combination of characters, we propose the new genus Guarreraea to encompass Cyclotella stipata and Orthoseira limnopolarensis. Its systematic placement relative to other genera assigned to the Order Orthoseirales is discussed.                The examination of additional materials from Neuquén deposited at the Frenguelli Collection revealed the presence of two other taxa with carinoportulae that are described as the new species, Orthoseira frenguellii and O. ferrarioana.

scholarly journals Two new species of Colletteidae (Crustacea: Tanaidacea: Tanaidomorpha) from Bransfield Strait, Antarctica

2017 ◽  
Author(s):  
Juliana L. Segadilha ◽  
Kátia C. Dos Santos ◽  
Cristiana S. Serejo
Keyword(s):  
New Species ◽  
The Other ◽  
Bransfield Strait ◽  
Number Of Species ◽  
Two New Species ◽  
Lateral Margins

Samples from deep benthic areas in the Bransfield Strait, Antarctica, revealed the presence of two new species of Colletteidae: Filitanais elongatus sp. nov. and Macrinella lavradoae sp. nov. Filitanais elongatus sp. nov. resembles F. moskalevi in its habitus; it can, however, be distinguished by characters such as the pleonites and pleotelson with lateral margins parallel and the uropod exopod being longer than half of the first endopod article. Macrinella lavradoae sp. nov. differs from the other species of Macrinella in the shape of the uropod and the pleotelson, with the uropod exopod shorter than the first article of the endopod, the uropod about as long as the pleotelson and the pleotelson with a rounded tip. The number of species of Tanaidacea recorded from Antarctica increases to 162, while the colletteids are now represented by 16 species. Moreover, the diagnosis of the genus Filitanais is herein modified.

NEW SPECIES AND NEW COMBINATIONS IN THE SOUTH AMERICAN GENUS LESSINGIANTHUS (ASTERACEAE: VERNONIEAE)

2008 ◽  
Vol 65 (3) ◽  
pp. 359-368 ◽  
Author(s):  
M. Dematteis
Keyword(s):  
New Species ◽  
The Other ◽  
South American ◽  
New Taxon ◽  
New Combinations ◽  
The South ◽  
Two New Species

Two new species of the South American genus Lessingianthus (Asteraceae: Vernonieae) are described and illustrated. One of these species, Lessingianthus arctatus, bears a resemblance to L. linearis (Spreng.) H.Rob. and L. rosmarinifolius (Less.) H.Rob., but can be separated from them by its almost glabrous phyllaries, solitary heads and longer internodes. The other new taxon, Lessingianthus longicuspis, can be easily separated from L. cataractarum (Hieron.) H.Rob. and L. bardanoides (Less.) H.Rob., and other taxa of the genus, by the combination of petiolate leaves, aristate phyllaries and inflorescence bracts alternate to the heads. Four other taxa previously included in Vernonia are transferred to the genus Lessingianthus.

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