The occurrence and pathogenicity of forms of Godronia cassandrae in Quebec

1968 ◽  
Vol 46 (5) ◽  
pp. 597-599
Author(s):  
E. Smerlis
Keyword(s):  
Generic Level ◽  
Godronia Cassandrae

Three forms of Godronia cassandrae Peck, f. cassandrae, f. betulicola Groves, and f. vaccinii Groves, are reported from Quebec. Pathogenicity is demonstrated for all three forms. Neither f. cassandrae nor f. betulicola are host-specific at the generic level but occur on plants of several or different genera.

A REVISED GENERIC SYNOPSIS OF HYACINTHACEAE IN SUB-SAHARAN AFRICA, BASED ON MOLECULAR EVIDENCE, INCLUDING NEW COMBINATIONS AND THE NEW TRIBE PSEUDOPROSPEREAE

2003 ◽  
Vol 60 (3) ◽  
pp. 533-568 ◽  
Author(s):  
J. C. MANNING ◽  
P. GOLDBLATT ◽  
M. F. FAY
Keyword(s):  
Phylogenetic Analysis ◽  
Sub Saharan Africa ◽  
Molecular Evidence ◽  
New Combinations ◽  
Generic Level ◽  
The Family ◽  
Molecular Phylogenetic ◽  
Single Genus ◽  
New Tribe ◽  
Sub Saharan

A revised generic synopsis of sub-Saharan Hyacinthaceae is presented, based on a molecular phylogenetic analysis of the family. Generic rank is accorded only to reciprocally monophyletic clades that can be distinguished by recognizable morphological discontinuities, thereby permitting an appropriate generic assignment of species not included in the analysis. Three subfamilies are recognized within the region. Subfamily Ornithogaloideae, characterized by flattened or angular seeds with tightly adhering testa, is considered to include the single genus Ornithogalum, which is expanded to include the genera Albuca, Dipcadi, Galtonia, Neopatersonia and Pseudogaltonia. Recognizing any of these segregates at generic level renders the genus Ornithogalum polyphyletic, while subdivision of Ornithogalum into smaller, morphologically distinguishable segregates in order to preserve the monophyly of each is not possible. Subfamily Urgineoideae, characterized by flattened or winged seeds with brittle, loosely adhering testa, comprises the two mainland African genera Bowiea and Drimia. The latter is well circumscribed by its deciduous, short-lived perianth and includes the previously recognized genera Litanthus, Rhadamanthus, Schizobasis and Tenicroa. The monotypic Madagascan Igidia is provisionally included in the subfamily as a third genus on the basis of its seeds, pending molecular confirmation of its relationships. Subfamily Hyacinthoideae resolves into three clades, distinguished as tribes Hyacintheae (strictly northern hemisphere and not treated further), Massonieae and Pseudoprospereae tribus nov. Full descriptions and a key to their identification are provided for all genera. New combinations reflecting the generic circumscriptions adopted here are made for most African and all Indian and Madagascan species.

scholarly journals Complete Generic-Level Phylogenetic Analyses of Palms (Arecaceae) with Comparisons of Supertree and Supermatrix Approaches

2009 ◽  
Vol 58 (2) ◽  
pp. 240-256 ◽  
Author(s):  
William J. Baker ◽  
Vincent Savolainen ◽  
Conny B. Asmussen-Lange ◽  
Mark W. Chase ◽  
John Dransfield ◽  
...  
Keyword(s):  
Phylogenetic Analyses ◽  
Generic Level

Comparison of the Worldwide Cave Collembola at the Generic Level

2012 ◽  
Vol 122 (2) ◽  
pp. 118-124
Author(s):  
Gabriela Castaño-Meneses ◽  
José G. Palacios-Vargas
Keyword(s):  
Generic Level

A Putative Inter-Generic Hybrid Between Conomurex Fischer and Gibberulus Jousseaume (Gastropoda: Strombidae) from South Africa

The Festivus ◽  
2018 ◽  
Vol 50 (3) ◽  
pp. 158-163
Author(s):  
Aart Dekkers ◽  
Stephen Maxwell
Keyword(s):  
South Africa ◽  
Putative Hybrid ◽  
Generic Level ◽  
Bay Area ◽  
Evolutionary Force ◽  
Generic Hybrid ◽  
Area North

This paper highlights a putative inter-generic Conomurex x Gibberulus hybrid from the Sodwana Bay area, North Natal, Republic of South Africa. Putative hybridisation in the Strombidae is becoming ever more recognised at the intra-generic level. Much rarer are the inter- generic hybrids. The new putative hybrid indicates that inter-generic hybridisation may well be an evolutionary force in the radiation of Strombidae, facilitating both rapid reticulation and speciation.

Checklist of the cestode parasites of wild birds of Argentina

2021 ◽  
Vol 95 ◽  
Author(s):  
F.B. Drago ◽  
M. Dueñas Díaz ◽  
R. Draghi ◽  
V. Núñez
Keyword(s):  
Geographical Distribution ◽  
Wild Birds ◽  
Nominal Species ◽  
Generic Level ◽  
The Family ◽  
Host Parasite ◽  
Annotated Checklist

Abstract An annotated checklist of the cestode parasites of Argentinean wild birds is presented, as the result of a compilation of parasitological papers published between 1900 and April 2021. This review provides data on hosts, geographical distribution, sites of infection, location of material deposited in helminthological collections, references and taxonomic comments. A host/parasite list is also provided. During this period, 38 papers were published that gather information about 34 cestode nominal species and 11 taxa identified at generic level, belonging to three orders, ten families and 35 genera. The highest number of cestode taxa was recorded in the family Hymenolepididae, with 12 nominal species and two taxa identified at generic level, followed by Dilepididae, with eight nominal species and three taxa identified at generic level. Of the 1042 species of birds reported in Argentina, only 29 (2.8%) were reported as hosts of adult cestodes. The families of birds with the highest number of reported taxa were Laridae and Anatidae, with 20 and 14 taxa, respectively.

A statistical method for build orientation determination in additive manufacturing

2019 ◽  
Vol 25 (1) ◽  
pp. 187-207 ◽  
Author(s):  
Yicha Zhang ◽  
Ramy Harik ◽  
Georges Fadel ◽  
Alain Bernard
Keyword(s):  
Additive Manufacturing ◽  
Statistical Method ◽  
Supervised Machine Learning ◽  
Surface Model ◽  
Generic Level ◽  
Content Type ◽  
Build Orientation ◽  
Cad Models ◽  
Feature Based ◽  
Orientation Determination

Purpose For part models with complex shape features or freeform shapes, the existing build orientation determination methods may have issues, such as difficulty in defining features and costly computation. To deal with these issues, this paper aims to introduce a new statistical method to develop fast automatic decision support tools for additive manufacturing build orientation determination. Design/methodology/approach The proposed method applies a non-supervised machine learning method, K-Means Clustering with Davies–Bouldin Criterion cluster measuring, to rapidly decompose a surface model into facet clusters and efficiently generate a set of meaningful alternative build orientations. To evaluate alternative build orientations at a generic level, a statistical approach is defined. Findings A group of illustrative examples and comparative case studies are presented in the paper for method validation. The proposed method can help production engineers solve decision problems related to identifying an optimal build orientation for complex and freeform CAD models, especially models from the medical and aerospace application domains with much efficiency. Originality/value The proposed method avoids the limitations of traditional feature-based methods and pure computation-based methods. It provides engineers a new efficient decision-making tool to rapidly determine the optimal build orientation for complex and freeform CAD models.

Floral diversity, phytogeography, and climatic amelioration during the Early Carboniferous (Dinantian)

Paleobiology ◽  
1985 ◽  
Vol 11 (3) ◽  
pp. 293-309 ◽  
Author(s):  
Anne Raymond
Keyword(s):  
Plant Diversity ◽  
Early Carboniferous ◽  
High Latitudes ◽  
New Genera ◽  
Generic Level ◽  
The North ◽  
Floral Diversity ◽  
High Level ◽  
In The Beginning

Phytogeographic analysis of three Early Carboniferous intervals (Tournaisian–early Visean, Visean, and late Visean–early Namurian A) indicates a high level of phytogeographic differentiation in the beginning of the Early Carboniferous that decreases toward the end of this period. Climatic amelioration (warmer or wetter conditions) in the north middle and high latitudes, caused by the collision of Laurussia and Gondwana at the end of the Early Carboniferous, may be responsible for this decrease in phytogeographic provinciality. Toward the end of the Early Carboniferous, a large number of equatorial genera expand their ranges northward, and the average generic diversity of assemblages in the north high latitudes (Siberia) also rises. Both support the hypothesis of climatic amelioration. Northward migration of equatorial forms and the appearance of new genera endemic to Siberia both contributed to the rise in Siberian diversity. Although this trend is not statistically significant, additional evidence of diversity increase in northern high latitudes tied to climatic amelioration comes from the northernmost limit of diverse (≥ 10 genera) assemblages, which rises from 20°N at the beginning to 55°N at the end of the Early Carboniferous. Global plant diversity assessed at the generic level remained constant during the Early Carboniferous. The increase in Siberian diversity was offset by a decrease in equatorial diversity, perhaps due to the loss of pronounced latitudinal climatic gradients between north-middle and equatorial latitudes.

Towards a complete generic-level plastid phylogeny of the paleotropical woody bamboos (Poaceae: Bambusoideae)

Taxon ◽  
2017 ◽  
Vol 66 (3) ◽  
pp. 539-553 ◽  
Author(s):  
Meng-Yuan Zhou ◽  
Yu-Xiao Zhang ◽  
Thomas Haevermans ◽  
De-Zhu Li
Keyword(s):  
Generic Level ◽  
Woody Bamboos

Molluscan biostratigraphy of the lower River Bend Formation at the Martin Marietta Quarry, New Bern, North Carolina

1991 ◽  
Vol 65 (1) ◽  
pp. 80-118 ◽  
Author(s):  
Thomas J. Rossbach ◽  
Joseph G. Carter
Keyword(s):  
North Carolina ◽  
Coastal Plain ◽  
Warm Water ◽  
Gulf Coastal Plain ◽  
Generic Level ◽  
Evolutionary Transitions ◽  
Molluscan Fauna ◽  
Molluscan Diversity ◽  
Molluscan Species ◽  
River Bend

The lower River Bend Formation at the Martin Marietta New Bern quarry in Craven County, North Carolina, contains a diverse and abundant moldic molluscan fauna. This fauna, reconstructed by latex casts, suggests a Vicksburgian or a post-Vicksburgian, pre-Chickasawhayan age for the New Bern exposure. Forty-one molluscan species and subspecies are presently identified from the lower River Bend Formation, 11 of which are new: Turritella caelatura alani, Turritella neusensis, Galeodaria britti, Phalium newbernensis, Cymatium planinodum, Oocorys vadosus, Ecphora wheeleri, Lyria concinna, Scaphella saintjeani, Turricula (Orthosurcula) aequa, and Lucina (Stewartia) micraulax. This fauna is virtually identical at the generic level and similar at the species level to the Vicksburgian faunas of the Gulf Coastal Plain. About 37 percent of the New Bern species also occur in the Vicksburgian of Mississippi, although many of these species reach considerably larger sizes at New Bern. Apparent evolutionary transitions between previously known Vicksburgian and Chickasawhayan mollusks suggest a time of deposition intermediate between these two Oligocene stages.Moderately high molluscan diversity, the abundance of characteristically warm-water genera, and associated carbonate-rich sediments suggest that the lower River Bend Formation represents a subtropical, open-marine, predominantly carbonate environment immediately seaward of a nearshore lagoonal or barrier island complex.The lower River Bend Formation at New Bern differs faunally, climatically, and sedimentologically from the upper River Bend Formation in quarry exposures near Belgrade, North Carolina. The upper River Bend Formation contains a lower diversity molluscan fauna with marked dominance diversity and few warm-water taxa. It represents a slightly cooler nearshore, open-marine environment in a transitional siliciclastic-carbonate sedimentary regime. The considerable taxonomic and sedimentologic differences between the lower and upper parts of the River Bend Formation corroborate microfossil evidence suggesting that they represent temporally distinct depositional cycles.

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