Isoetes prototypus, a new diploid species from eastern Canada

1991 ◽  
Vol 69 (2) ◽  
pp. 277-281 ◽  
Author(s):  
D. M. Britton ◽  
J. P. Goltz

A new species of Isoetes, I. prototypus from eastern Canada, is described. The morphology of the megaspores shows some similarity to those of acadiensis and I. hieroglyphica, but the microspores have a spinulose network on their surface. The plants have straight and rigid leaves that resemble some forms of I. macrospora. The species is diploid (2n = 22) and is found deep (± 2 m) in cool lakes in New Brunswick and Nova Scotia. Key words: Isoetes, new species, diploid, Canada, SEM.


2007 ◽  
Vol 139 (1) ◽  
pp. 45-53 ◽  
Author(s):  
Jan Klimaszewski ◽  
Christopher G. Majka

AbstractTwo new athetine beetles from eastern Canada are described and illustrated: Atheta (Metadimetrota) savardae Klimaszewski and Majka, sp. nov. (Nova Scotia, Quebec) and Atheta (Datomicra) acadiensis Klimaszewski and Majka, sp. nov. (Nova Scotia, New Brunswick, Prince Edward Island, and Quebec). Their relationships to other closely related species are discussed, and new data on bionomics and distribution are provided. The new species are presented with a short diagnosis, description, colour habitus images, and black-and-white genital images.



2003 ◽  
Vol 135 (2) ◽  
pp. 159-186 ◽  
Author(s):  
Jan Klimaszewski ◽  
Greg Pohl ◽  
Georges Pelletier

AbstractA revision of the Canadian species of the genus Silusa Erichson is presented. In this contribution, we treat six species recently discovered in Canada, one of which is a new species from Alberta, Silusa langori Klimaszewski sp. nov. The distribution records for two species are greatly expanded. Silusa californica Bernhauer is now known from Alaska, Minnesota, Alberta, Quebec, New Brunswick, and Nova Scotia (previous records: British Columbia, California). Silusa vesperis Casey is now known from Washington and British Columbia (previous record: California). For two other species, there are first records for Canada and one new United States state record. Silusa alternans Sachse is now known from Quebec, New Brunswick, Nova Scotia, and New Hampshire (previous records: Georgia, New York), and Silusa densa Fenyes is now known from Alberta (previous record: California). Silusa valens Casey is here considered as a synonym of S. alternans. Silusa rutilans Casey and S. modica Casey are confirmed to belong to Leptusa Kraatz, and both are here considered as new synonyms of Leptusa canonica Casey. Silusa gracilis Sachse and S. nanula Casey are also confirmed to belong to the genus Leptusa. The following lectotypes are newly designated for species described on the basis of syntypes: S. alternans Sachse and S. californica Bernhauer. New data are provided on the systematics, relationships, bionomics, and distribution for all Nearctic species of America north of Mexico. Diagnoses and illustrations of external and genital features are provided for all species, and the distribution of each is discussed and shown on maps. A key to the species occurring in Canada is presented.



2008 ◽  
Vol 45 (8) ◽  
pp. 897-908 ◽  
Author(s):  
Carole J. Burrow ◽  
Susan Turner ◽  
Sylvain Desbiens ◽  
Randall F. Miller

In 1890, Traquair assigned isolated fin spines from the Early Devonian of eastern Canada to a new gyracanthid acanthodian Gyracanthus incurvus , based on the similarity of the distinctive oblique ridges on the spines to the ornament on the large robust fin spines of Gyracanthus spp. from the British Carboniferous Coal Measures. Other similarly ornamented spines from the Early Devonian of Germany were tentatively assigned in 1933 by Gross to the same genus as a new species Gyracanthus? convexus . Based on examination of the type material, as well as newly collected specimens from Emsian sandstones and mudstones of the Gaspé Peninsula, Quebec and the Atholville beds, New Brunswick, we erect a new genus Ankylacanthus gen. nov. for these two species. Spines of the new genus are distinguished by being laterally flattened and thin-walled, with a single row of denticles along one side of the posterior groove, and having thin spine ridges ornamented with low smooth nodes. Other Early to Middle Devonian specimens in South America, Saudi Arabia, and Iran are also tentatively referred to the new genus, which seems to have had an early (Lochkovian–Pragian) cross-north Gondwanan distribution, transferring into Laurentia and spanning Emsian–Eifelian times.



2019 ◽  
Vol 37 ◽  
pp. 211-215
Author(s):  
Antonio J. Pujadas Salvà ◽  
Raúl García-Salmones ◽  
Eusebio López Nieto

Erigeron cabelloi A. Pujadas, R. García-Salmones & E. López (Asteraceae) a new species from the Pyrennees. Palabras clave. Andorra, Compositae, Corología, Erigeron neglectus, Flora Ibérica. Key words. Andorra, Chorology, Compositae, Erigeron neglectus, Iberian Flora.



1984 ◽  
Vol 62 (4) ◽  
pp. 778-794 ◽  
Author(s):  
Christopher S. Lobban

From a study of living materials and specimens in several regional herbaria, a list has been drawn up of all the common and several of the rarer tube-dwelling diatoms of eastern Canada. Descriptions, illustrations of living material and acid-cleaned valves, and a key to the species are provided. Most specimens were from the Atlantic Provinces and the St. Lawrence estuary, but a few were from the Northwest Territories. By far the most common species is Berkeleya rutilans. Other species occurring commonly in the Quoddy Region of the Bay of Fundy, and sporadically in space and time elsewhere, arc Navicula delognei (two forms), Nav. pseudocomoides, Nav. smithii, Haslea crucigera, and a new species, Nav.rusticensis. Navicula ramosissima and Nav. mollis in eastern Canada are usually found as scattered cohabitants in tubes of other species. Nitzschia tubicola and Nz. fontifuga also occur sporadically as cohabitants.



2021 ◽  
Vol 23 (1) ◽  
pp. 9-16
Author(s):  
RYUDAI ITO ◽  
TOSHIHARU MITA

Odontepyris costatus sp. nov. is described from Japan and Taiwan. This new species is most similar to O. formosicola Terayama, 1997 known from Cambodia and Taiwan according to the key to the Eastern Palaearctic Odontepyris. O. costatus sp. nov. can be distinguished from the latter by the relatively small eye and the wide metapectal-propodeal disc. It is also similar to O. telortis Lim & Lee, 2009 known from South Korea, but it is distinguished from O. telortis by the imbricate median area of metapostnotum. The morphological variations and diagnostic characters of the Eastern Palaearctic species are briefly discussed and the modified key to species is provided. Key words: new species, Japan, Taiwan, wing venation



1992 ◽  
Vol 70 (12) ◽  
pp. 2484-2489 ◽  
Author(s):  
Amanda L. Siegfried ◽  
Keith A. Seifert ◽  
Barton C. Bilmer

A new species in the Hyphomycete genus Phialocephala is described. The new species Phialocephala virens produces an intense greyish green to turquoise colour on certain media and has smaller conidia, shorter phialides, and shorter conidiophores than previously described Phialocephala species. Its tolerance to low levels of the antibiotic cycloheximide suggests the fungus may have affinities with species of Ophiostoma. Cultures of the fungus cause a bright green stain when inoculated onto sapwood of some conifers. Key words: Phialocephala virens, new species, Hyphomycetes, sapstain.



Phytotaxa ◽  
2015 ◽  
Vol 213 (3) ◽  
pp. 282 ◽  
Author(s):  
GIANPIETRO GIUSSO DEL GALDO ◽  
CRISTIAN BRULLO ◽  
Salvatore Brullo ◽  
CRISTINA SALMERI

Allium kyrenium, a new species of Allium sect. Codonoprasum, is described and illustrated from northern Cyprus. It is a very circumscribed geophyte growing on the calcareous cliffs of the Kyrenia range. This diploid species, with a somatic chromosome number 2n = 16, shows close morphological relationships with A. stamineum, a species complex distributed in the eastern Mediterranean area. Its morphology, karyology, leaf anatomy, ecology, conservation status and taxonomical relationships with the allied species belonging to the A. stamineum group are examined.



2000 ◽  
Vol 74 (5) ◽  
pp. 858-878 ◽  
Author(s):  
Stephen R. Westrop ◽  
Ed Landing

The Hanford Brook Formation, one of the classic Cambrian units of Avalonian North America, contains at least eight species of endemic trilobites, including Berabichia milleri Westrop n. sp., that are assigned to seven genera. The vertical succession of faunas is far more complex than has been recognized previously, with each member containing a lithofacies-specific assemblage. These are, in ascending order: a bradoriid-linguloid Association without trilobites in the nearshore St. Martin's Member, a Protolenus Association in dysaerobic siltstones and sandstones of the Somerset Street Member, and a Kingaspidoides-Berabichia Association in hummocky cross-stratified sandstones of the Long Island Member that overlie a parasequence boundary at Hanford Brook. Due to the breakdown of biogeographic barriers in the late Early Cambrian, two new species-based zones, the Protolenus elegans and Kingaspidoides cf. obliquoculatus zones, share trilobite genera with the Tissafinian Stage of Morocco. This generic similarity has been the basis for correlation of this upper Lower Cambrian interval on the Avalon continent with the West Gondwanan lowest Middle Cambrian. However, the clear facies control on the occurrence of genera in the Hanford Brook Formation and the presence of an abrupt faunal break and unconformity at the base of the Tissafinian in Morocco makes this correlation questionable. The Hanford Brook Formation may represent a late Early Cambrian interval unknown in Gondwana. Sequence-stratigraphic criteria even raise the possibility that the Protolenus Association is the biofacies equivalent of Callavia broeggeri Zone faunas of the Brigus Formation of Newfoundland, Nova Scotia and Massachusetts.



Phytotaxa ◽  
2014 ◽  
Vol 186 (5) ◽  
pp. 271 ◽  
Author(s):  
Maria Mercedes Sosa ◽  
Massimiliano Dematteis

Stemodia diplohyptoides (Plantaginaceae), a new species from Gratiolae tribe is described and illustrated. This taxon is found in northeastern Argentina, at the edge of the Parana River that surrounds the north and center of Misiones province (Argentina). It is a diploid that has been traditionally treated under Stemodia hyptoides, which is here re-circumscribed to include only autopolyploid plants (tetraploid and hexaploid). The diploid specimens may be distinguished from the polyploid S. hyptoides by several morphological features such as shape, pubescence and margin of the leaves, corolla length and corolla tube pubescence. In addition, scanning electron microphotographs of seeds, chromosomes numbers, a distribution map and a key to distinguish the related species are also provided. On the basis of morphological, cytological and geographical data, some evolutionary considerations are inferred.



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