Parallel tagged amplicon sequencing reveals major lineages and phylogenetic structure in the North American tiger salamander (Ambystoma tigrinum) species complex

2012 ◽  
Vol 22 (1) ◽  
pp. 111-129 ◽  
Author(s):  
Eric M. O'Neill ◽  
Rachel Schwartz ◽  
C. Thomas Bullock ◽  
Joshua S. Williams ◽  
H. Bradley Shaffer ◽  
...  
Keyword(s):  
North American ◽  
Species Complex ◽  
Amplicon Sequencing ◽  
Ambystoma Tigrinum ◽  
Tiger Salamander ◽  
Phylogenetic Structure ◽  
The North

Descriptions of four new species of the Ambrysus signoreti Stål species complex (Heteroptera: Nepomorpha: Naucoridae

Zootaxa ◽  
2019 ◽  
Vol 4615 (2) ◽  
pp. 285
Author(s):  
DANIEL REYNOSO-VELASCO ◽  
ROBERT W. SITES
Keyword(s):  
New Species ◽  
North American ◽  
Species Complex ◽  
The North ◽  
Species Groups ◽  
Multiple Species

The genus Ambrysus Stål is the most species rich genus of Naucoridae. Multiple species groups in the genus have been proposed, including the North American Ambrysus signoreti Stål complex. Four new species belonging to the A. signoreti complex are described and illustrated: three from Mexico (Ambrysus brailovskyi Reynoso & Sites n. sp., A. henryi Reynoso & Sites n. sp., A. schuhi Reynoso & Sites n. sp.) and one from Mexico and Guatemala (A. sitesi Reynoso n. sp.), bringing the total number of described species of Ambrysus to 97. 

The Caloplaca crenulatella species complex; its intricate taxonomy and description of a new species

2011 ◽  
Vol 43 (5) ◽  
pp. 467-481 ◽  
Author(s):  
Jan VONDRÁK ◽  
Pavel ŘÍHA ◽  
Olexii REDCHENKO ◽  
Olga VONDRÁKOVÁ ◽  
Pavel HROUZEK ◽  
...  
Keyword(s):  
New Species ◽  
North American ◽  
Species Complex ◽  
European Species ◽  
The North ◽  
Its Nrdna ◽  
A New Species ◽  
Distinctive Phenotype

AbstractThe Caloplaca crenulatella species complex is monophyletic, based on analysis of ITS nrDNA sequences. It is characterized mainly by its ascospores and a simplified thallus. Caloplaca aquensis, C. borysthenica, C. interfulgens, C. lactea, C. marmorata and C. tominii represent well-defined monophyletic lineages within it. Caloplaca diffusa, described here as a new species, is a well-supported lineage with a distinctive phenotype. Caloplaca crenulatella s. lat. and C. ferrarii s. lat. are heterogeneous taxa appearing in four and two places respectively within our tree. Caloplaca ochracea also belongs to the group, although it has different ascospore characters. Caloplaca gyalolechiaeformis and C. pseudocitrina are later synonyms of C. tominii. Arctic and North American sorediate specimens morphologically very close to C. tominii represent a separate lineage recently recognized as C. erichansenii. The North American Caloplaca nashii has a C. crenulatella-like phenotype but does not belong to the C. crenulatella complex. The identities of Caloplaca lacteoides and Caloplaca epigaea are not clear, but the latter may be a terricolous ecotype of one of the entities within C. crenulatella s. lat. A key to the European species of the group is provided.

In and out of refugia: historical patterns of diversity and demography in the North American Caesar's mushroom species complex

2015 ◽  
Vol 24 (23) ◽  
pp. 5938-5956 ◽  
Author(s):  
Santiago Sánchez-Ramírez ◽  
Rodham E. Tulloss ◽  
Laura Guzmán-Dávalos ◽  
Joaquín Cifuentes-Blanco ◽  
Ricardo Valenzuela ◽  
...  
Keyword(s):  
North American ◽  
Species Complex ◽  
Mushroom Species ◽  
The North

scholarly journals An Updated Global Species Diversity and Phylogeny in the Forest Pathogenic Genus Heterobasidion (Basidiomycota, Russulales)

2021 ◽  
Vol 11 ◽  
Author(s):  
Yuan Yuan ◽  
Jia-Jia Chen ◽  
Kari Korhonen ◽  
Francis Martin ◽  
Yu-Cheng Dai
Keyword(s):  
North America ◽  
North American ◽  
Species Complex ◽  
Phylogenetic Analyses ◽  
Second World War ◽  
White Rot ◽  
World War ◽  
Plant Quarantine ◽  
The North ◽  
Second World

Heterobasidion species are amongst the most intensively studied polypores because several species are aggressive white rot pathogens of managed coniferous forests mainly in Europe and North America. In the present study, both morphological and multilocus phylogenetic analyses were carried out on Heterobasidion samples from Asia, Oceania, Europe and North America. Three new taxa were found, i.e., H. armandii, H. subinsulare, and H. subparviporum are from Asia and are described as new species. H. ecrustosum is treated as a synonym of H. insulare. So far, six taxa in the H. annosum species complex are recognized. Heterobasidion abietinum, H. annosum, and H. parviporum occur in Europe, H. irregulare, and H. occidentale in North America, and H. subparviporum in East Asia. The North American H. irregulare was introduced to Italy during the Second World War. Species in the H. annosum complex are pathogens of coniferous trees, except H. subparviporum that seems to be a saprotroph. Ten species are found in the H. insulare species complex, all of them are saprotrophs. The pathogenic species are distributed in Europe and North America; the Asian countries should consider the European and North American species as entry plant quarantine fungi. Parallelly, European countries should consider the American H. occidentale and H. irregulare as entry plant quarantine fungi although the latter species is already in Italy, while North America should treat H. abietinum, H. annosum s.s., and H. parviporum as entry plant quarantine fungi. Eight Heterobasidion species found in the Himalayas suggest that the ancestral Heterobasidion species may have occurred in Asia.

scholarly journals Closely related budding yeast species respond to different ecological signals for spore activation

2020 ◽  
Author(s):  
Samuel Plante ◽  
Christian R Landry
Keyword(s):  
North American ◽  
Inorganic Phosphate ◽  
Species Complex ◽  
Yeast Species ◽  
Culture Media ◽  
Budding Yeast ◽  
Reproductive Barriers ◽  
The North ◽  
Spore Activation ◽  
Biochemical Signals

AbstractSpore activation is one of the most important developmental decisions in fungi as it initiates the transition from dormant and stress resistant cells to vegetative cells. Because in many species mating follows spore activation and germination, signals that trigger this developmental transition can also contribute to species reproductive barriers. Here we examine the biochemical signals triggering spore activation in a natural species complex of budding yeast, Saccharomyces paradoxus (lineages SpA, SpB, SpC and SpC*). We first demonstrate that we can quantitatively monitor spore activation in these closely related lineages. Second, we dissect the composition of culture media to identify components necessary and/or sufficient to activate spores in the four lineages. We show that, contrary to expectation, glucose is necessary but not sufficient to trigger spore activation. We also show that two of the North American lineages (SpC and SpC*) diverge from the other North American (SpB) and European (SpA) lineages in terms of germination signal as their spore activation requires inorganic phosphate. Our results show that the way budding yeast interpret environmental conditions during spore activation diverged among closely related and incipient species, which means that it may play a role in their ecological differentiation and reproductive isolation.

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