Paramonostomum signiensis n.sp. (Trematoda: Notocotylidae) from the Sheathbill, Chionis alba (Gmelin), at Signy Island, South Orkney Islands

1969 ◽  
Vol 43 (1-2) ◽  
pp. 53-57 ◽  
Author(s):  
N. V. Jones ◽  
I. C. Williams
Keyword(s):  
New Species ◽  
Parasitological Examination ◽  
Orkney Islands ◽  
British Antarctic Survey ◽  
Signy Island ◽  
South Orkney Islands ◽  
A New Species

Through the generous co-operation of the British Antarctic Survey twelve Sheathbills were collected in April, 1967 at Signy Island, preserved in deep freeze, and made available to us for parasitological examination. Five of the Sheathbills were found to be infected with a new species of notocotylid trematode, namely Paramonostomum signiensis n.sp., which is described below and considered in relation to other species of Paramonostomum Lühe, 1909.

Theudium Austroatlanticum (Verrucariaceae), A New Species from the South Orkney Islands

1993 ◽  
Vol 25 (3) ◽  
pp. 271-277 ◽  
Author(s):  
Alan Orange
Keyword(s):  
New Species ◽  
The South ◽  
Orkney Islands ◽  
Signy Island ◽  
South Orkney Islands ◽  
A New Species

AbstractThelidium austroatlanticum sp. nov. is described from Signy island; it is characterized by an epilithic thallus, more or less appressed involucrellum, and 1-septate spores 30–40 μm long. Thelidium incavatum is also reported for Signy Island.

The Nematode and Acanthocephalan Parasites of the Sheathbill, Chionis alba (Gmelin), at Signy Island, South Orkney Islands and a summary of host parasite relationships in the Sheathbill

1969 ◽  
Vol 43 (1-2) ◽  
pp. 59-67 ◽  
Author(s):  
N. V. Jones ◽  
I. C. Williams
Keyword(s):  
Orkney Islands ◽  
British Antarctic Survey ◽  
Signy Island ◽  
South Orkney Islands ◽  
Host Parasite ◽  
Trematode Parasites

We have previously reported on the cestode and trematode parasites of the Sheathbill at Signy Island (Jones & Williams 1967, 1968, 1969) and conclude with an account of the nematodes and Acanthocephala. Our previous reports were based on specimens obtained from 13 Sheathbills collected at Signy Island in July and October, 1965 by Mr. Charles Howie, British Antarctic Survey. In addition to these we have examined a further 12 Sheathbills taken at Signy Island in March, 1967. We are greatly indebted to Mr. E. A. Smith, Senior Biologist, British Antarctic Survey, for arranging the collection and transport of the latter material.

The Trematode Parasites of the Sheathbill, Chionis alba (Gmelin), from Signy Island, South Orkney Islands

1968 ◽  
Vol 42 (1-2) ◽  
pp. 65-80 ◽  
Author(s):  
N. V. Jones ◽  
I. C. Williams
Keyword(s):  
Orkney Islands ◽  
British Antarctic Survey ◽  
Signy Island ◽  
Digenetic Trematodes ◽  
South Orkney Islands ◽  
Trematode Parasites

This paper reports on two species of digenetic trematodes, namely Gymnophallus deliciosus (Olsson, 1893) and Notocotylus chionis Baylis, 1928, from Sheathbills collected on Signy Island.(lat. 60° 43' S., long. 45° 36' W.), South Orkney Islands, in July and October 1965 by Mr Charles Howie of the British Antarctic Survey. The birds were preserved in deep-freeze and later passed to us for examination. An account of the cestode parasites of these birds has been given previously (Jones & Williams, 1967).

Myriospora, a genus newly reported for Antarctica with a worldwide key to the species

2018 ◽  
Vol 50 (1) ◽  
pp. 101-112
Author(s):  
O. W. PURVIS ◽  
S. FERNÁNDEZ-BRIME ◽  
M. WESTBERG ◽  
M. WEDIN
Keyword(s):  
New Species ◽  
Phylogenetic Analyses ◽  
Strong Support ◽  
First Record ◽  
Mica Schist ◽  
Orkney Islands ◽  
Signy Island ◽  
South Orkney Islands ◽  
Molecular Phylogenetic

AbstractMyriospora signyensis Purvis, Fdez-Brime, M. Westb. & Wedin is described from Signy Island, South Orkney Islands, Antarctica, where it occurs predominantly on quartz mica schist. This represents the first record of the genus for Antarctica. The distinctive interrupted photobiont arrangement places it within the genus Myriospora (formerly known as the ‘Acarospora’ smaragdula group, or Silobia). The new species is characterized by having large, distinctly elevated, sessile apothecia with a prominent margin and a thallus that is usually lobed at the margins and variously orange-red, rust-coloured or brown-pigmented. Molecular phylogenetic analyses inferred with strong support that M. signyensis is closely related to M. scabrida which is similar in having a lobed, imbricate thallus with large and frequently somewhat raised apothecia, but which differs in never being rusty red, by frequently having a larger number of apothecia per areole/squamule and by having a thick and distinctive thalline epinecral layer. Myriospora signyensis is otherwise most similar to M. dilatata but the thallus of M. dilatata is never imbricate-lobate and the ascomata of M. signyensis have larger and more distinctly raised and sessile apothecia. A worldwide key to the 10 species currently recognized in the genus is presented.

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