The rusts (Uredinales) of arctic Canada

1989 ◽  
Vol 67 (11) ◽  
pp. 3315-3365 ◽  
Author(s):  
J. A. Parmelee
Keyword(s):  
Species Delimitation ◽  
Light Microscope ◽  
Canadian Arctic ◽  
Spore Wall ◽  
Arctic Canada ◽  
Spore Wall Ornamentation

Fifty-three taxa in 11 genera are described and illustrated from the Canadian Arctic. Included are a key to the genera and keys to the species within each genus. Prior records in many journals mostly lacked illustrations. Herein light microscope photographs are complemented by SEM photographs to show spore wall ornamentation, an essential character in species delimitation.

Spore wall ontogeny in Pseudoplectania nigrella and Plectania nannfeldtii (Ascomycotina, Pezizales)

1995 ◽  
Vol 73 (11) ◽  
pp. 1761-1767 ◽  
Author(s):  
Li-Tzu Li ◽  
James W. Kimbrough
Keyword(s):  
Key Words ◽  
Light Microscope ◽  
Secondary Wall ◽  
Spore Wall ◽  
Wall Layer ◽  
Ultrastructural Studies ◽  
Blue Stain ◽  
Spore Wall Ornamentation

Pseudoplectania and Plectania currently belong to the Sarcosomataceae, tribe Sarcosomateae, a group with members lacking cyanophilic spore markings (absorbing a blue stain). The two genera are morphologically similar in having blackish discoid-shaped apothecia but differ in having globose and ellipsoid spores, respectively. Ultrastructural studies show that ascospores of Pseudoplectania nigrella (Pers. ex Fr.) Fuckel lack a secondary wall layer. On the contrary, Plectania nannfeldtii Korf has secondary spore wall ornamentation that is cyanophilic under a light microscope. The data suggest retention of Pseudoplectania nigrella in the Sarcosomateae; however, the position of certain species of Plectania needs to be reevaluated. Key words: Pezizales, Plectania, Pseudoplectania, Sarcosomataceae, spore ontogeny, ultrastructure.

A new Silurian Astylospongid sponge from Baillie-Hamilton Island, Canadian Arctic Archipelago

1978 ◽  
Vol 15 (1) ◽  
pp. 157-162 ◽  
Author(s):  
J. Keith Rigby ◽  
Alfred C. Lenz
Keyword(s):  
Canadian Arctic ◽  
Canadian Arctic Archipelago ◽  
Arctic Canada ◽  
Uniform Size ◽  
Cape Phillips Formation

The new sponge, Astylospongiella megale, is described from rocks of the Ludlovian Neodiversograptus nilssoni Zone of the Cape Phillips Formation from southern Baillie-Hamilton Island, Arctic Canada. The genus is included in Astylospongiidae because its skeletal net is composed of sphaeroclones, which in this species, are of relatively uniform size throughout the sponge. The new sponge also has irregularly placed radiating canals which are subparallel to the upper surface, and which are cross-connected by upward fanning canals that are approximately normal to the sponge surface and the radiating canals.

Systematics of the Acanthoparyphinae (Trilobita), by species from the Silurian of Arctic Canada

1998 ◽  
Vol 72 (4) ◽  
pp. 698-718 ◽  
Author(s):  
Jonathan M. Adrain
Keyword(s):  
New Species ◽  
Type Species ◽  
Cladistic Analysis ◽  
Canadian Arctic ◽  
Entire Group ◽  
Arctic Canada ◽  
Basal Node ◽  
The Family ◽  
Cape Phillips Formation ◽  
Basal Structure

Cladistic analysis of the trilobite subfamily Acanthoparyphinae Whittington and Evitt, 1954, yields an explicit hypothesis of relationship for the group. All Silurian species together form a robustly supported monophylum including the genera Hyrokybe Lane, 1972, Parayoungia Chatterton and Perry, 1984, and Youngia Lindström, 1885. Sister to this is the Ordovician type species of Acanthoparypha Whittington and Evitt, 1954. Remaining species that have historically been assigned to either Acanthoparypha or Pandaspinapyga Esker and Levin, 1964, form a rather labile paraphylum. Nevertheless, the entire group thus identified is definitely monophyletic, and supported by several prominent synapomorphic character-states.The basal structure and basal node of the subfamily are more difficult to assess. The relationships of the genera Hammannopyge Přibyl, Vaněk, and Pek, 1985, Holia Bradley, 1930, and Nieszkowskia Schmidt, 1881, need to be addressed within the wider context of the family as a whole. The traditional assignment of Holia to the acanthoparyphines is followed.Wenlock acanthoparyphines from the Cape Phillips Formation of the central Canadian Arctic islands include several species of Hyrokybe and Parayoungia. They are similar to, and in one case conspecific with, coeval forms to the southwest in the southern Mackenzie Mountains.Five species are new: Holia glabra, Hyrokybe lightfooti, Hyrokybe youngi, Hyrokybe mitchellae, and Parayoungia mclaughlini. At least four other potentially new species are reported in open nomenclature.

A new Silurian retiolitid graptolite from Arctic Canada

1993 ◽  
Vol 67 (1) ◽  
pp. 160-162 ◽  
Author(s):  
A. C. Lenz
Keyword(s):  
Canadian Arctic ◽  
Arctic Canada ◽  
Common Component ◽  
Single Piece

Retiolitid graptolites are a very common component in Silurian graptolite faunas of the Canadian Arctic, both in flattened form on shale surfaces and in uncompressed form in limestone concretions found in the enclosing shales (Lenz and Melchin, 1987). Upper Wenlock and Ludlow rocks are particularly prolific, having yielded about 20 species of retiolitids to date. One of the collections made during the summer of 1991 was a single piece of talus-derived shale containing 10 complete and slightly fragmented retiolitids. These specimens are morphologically unique, and their description is the purpose of this note.

scholarly journals A Porolepiform Rhipidistian from the Lower Devonian of the Canadian Arctic

Fossil Record ◽  
2000 ◽  
Vol 3 (1) ◽  
pp. 99-109 ◽  
Author(s):  
H.-P. Schultze
Keyword(s):  
Phylogenetic Analysis ◽  
Lower Devonian ◽  
Canadian Arctic ◽  
Arctic Canada ◽  
New Form

A holoptychiid fish is described from the Lower Devonian of Arctic Canada. The new form is distinct from other holoptychiids by the presence of a large supraorbital bone and a boomerang-shaped tabular. <i>Nasogaluakus</i> n. gen. is the oldest and most primitive holoptychiid based on a phylogenetic analysis of porolepiforms and their closest relatives. The sequence of the genera corresponds to their stratigraphic appearance. <br><br> Ein Holoptychiide aus dem Unterdevon der kanadischen Arktis wird beschrieben. Er unterscheidet sich durch ein großes Supraorbitale und die Bumerang-Form des Tabulare von allen übrigen Holoptychiiden. <i>Nasogaluakus</i> n. gen. ist der älteste und primitivste Holoptychiide, was durch eine phylogenetische Analyse der Porolepiformes belegt wird. Die Abfolge der Gattungen in diesem Verwandtschaftsschema stimmt mit ihrem zeitlichen Auftreten überein. <br><br> doi:<a href="http://dx.doi.org/10.1002/mmng.20000030106" target="_blank">10.1002/mmng.20000030106</a>

A systematic evaluation of basidiospore symmetry and tegumentation in hypogeous and gasteroid Russulales

1988 ◽  
Vol 66 (12) ◽  
pp. 2561-2573 ◽  
Author(s):  
Steven L. Miller
Keyword(s):  
Light Microscope ◽  
Spore Wall ◽  
Systematic Evaluation ◽  
Spore Morphology ◽  
Spore Surface ◽  
Layer 2 ◽  
Spore Walls ◽  
Poorly Differentiated ◽  
Surface Ornamentation ◽  
Dark Blue

Spore wall architecture and ontogeny of ornamentation in several genera and species of hypogeous and gasteroid Russulales are similar to those described previously for agaricoid Lactarius lignyotellus. Spore walls are composed of four layers, each differing in thickness and electron density. Layer 2 is electron transparent and corresponds to a dark blue, amyloid layer when mounted in Melzer's iodine reagent and viewed with the light microscope. Establishment of spore symmetry may be regulated by the hilar appendix body, which is a poorly differentiated cytoplasmic region in the hilar appendix of asymmetric spores of Macowanites luteolus, Elasmomyces russuloides, and Zelleromyces versicaulus but which is absent in symmetric spores of Z. sculptisporus, Martellia subochracea, and Gymnomyces yubaensis. A continuum in spore morphology from truly symmetric to asymmetric is evident in spores from individual sporocarps of many species of the Russulales. The variation in spore symmetry and spore surface ornamentation has clouded taxonomic concepts in the Russulales. Systematically, development of orthotropic and heterotropic spores has been regarded as two distinct end points of evolution, when they are likely terms describing degrees of the same phenomenon. The current circumscription of families and genera in the Russulales based on spore symmetry, therefore, appears to be artificial.

Phacopid trilobites from the Silurian of Arctic Canada

1996 ◽  
Vol 70 (6) ◽  
pp. 1091-1094 ◽  
Author(s):  
Jonathan M. Adrain ◽  
Eugene W. MacDonald
Keyword(s):  
Canadian Arctic ◽  
Minor Component ◽  
Arctic Canada ◽  
The Family ◽  
Cape Phillips Formation ◽  
The Subject

Diverse silicified trilobite faunas from the lower Wenlock to lower Ludlow of the Cape Phillips Formation, central Canadian Arctic, have been the subject of works by Perry and Chatterton (1977), Chatterton and Perry (1979), Adrain (1994), and Adrain and Edgecombe (1995, and in press). The present work describes a very minor component of these faunas, the family Phacopidae, which is nevertheless of considerable biogeographic interest.

scholarly journals A new smut fungus on a new grass: Sporisorium capillipedii-alpini (Ustilaginales) sp. nov. infecting Capillipedium alpinum (Poaceae) sp. nov., from Sichuan, China

Phytotaxa ◽  
2016 ◽  
Vol 252 (3) ◽  
pp. 217
Author(s):  
TEODOR T. DENCHEV ◽  
HANG SUN ◽  
CVETOMIR M. DENCHEV ◽  
DAVID E. BOUFFORD
Keyword(s):  
New Species ◽  
Infected Plant ◽  
Spore Wall ◽  
Smut Fungus ◽  
Smut Fungi ◽  
Western Sichuan ◽  
Spore Walls ◽  
Spore Wall Ornamentation ◽  
A New Species ◽  
Made In

A new smut fungus, Sporisorium capillipedii-alpini (Ustilaginales), and a new species of grass, Capillipedium alpinum (Poaceae), on which it is growing, are described and illustrated. The collections were made in western Sichuan, China. Capillipedium alpinum differs from other species of Capillipedium by its diminutive size and short, slender inflorescence. Sporisorium capillipedii-alpini is compared with the species of Sporisorium with similar symptoms (destroying all spikelets of an inflorescence) that infect Capillipedium, Botriochloa, and Dichanthium. The new smut fungus differs from these species as follows: from Sporisorium taianum by having larger spores with minutely echinulate spore walls, from S. dichanthicola by having larger spores, from S. sahayae by having lower spore wall ornamentation and thinner spore walls, from S. andropogonis-annulati by having larger spores, and smaller sterile cells with thinner walls, and from S. mysorense by possessing minutely echinulate spore walls and differently colored spores and sterile cells. The types of S. andropogonis-annulati, S. mysorense, and S. sahayae were re-examined and detailed descriptions of these species are given. A key to the smut fungi of Sporisorium, that infect Capillipedium, Botriochloa, and Dichanthium and destroy all spikelets of the inflorescence of an infected plant, is also provided.

Making Law for the Spirits: Angakkuit, Revelation and Rulemaking in the Canadian Arctic

Numen ◽  
2010 ◽  
Vol 57 (2) ◽  
pp. 127-153 ◽  
Author(s):  
Thomas Stone
Keyword(s):  
Canadian Arctic ◽  
Social Mechanisms ◽  
Arctic Canada ◽  
Indigenous Religion ◽  
Religious Traditions ◽  
Human Conduct ◽  
Normative Systems

AbstractProcesses of revelation and rulemaking are examined in the context of the indigenous religion of the Inuit of arctic Canada. Instances of misfortune, conventionally understood to be the manner in which spirit intentions concerning human conduct are revealed, instigate social mechanisms through which normative rules are created and maintained. The performances of Inuit religious specialists, the Angakkuit, play a key role in this process. The Inuit case invites comparative assessments of means of rule construction and the discernment of intentions in the context of both other religious traditions and secular normative systems.

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