The reinstatement of Latace Phil. (Amaryllidaceae, Allioideae)

Phytotaxa ◽  
2015 ◽  
Vol 239 (3) ◽  
pp. 253 ◽  
Author(s):  
Agostina Belen Sassone ◽  
Manuel J. Belgrano ◽  
Encarnación Rosa Guaglianone
Keyword(s):  
Morphological Features ◽  
The Other ◽  
Similar Species ◽  
New Combinations ◽  
Monotypic Genus ◽  
Priority Rule ◽  
Distribution Map ◽  
Other Hand ◽  
Independent Unit

The monotypic genus Latace has been formerly treated under its related genera Leucocoryne or Nothoscordum. The genus Zoellnerallium, on the other hand, was established to include the atypical Nothoscordum andinum (= Ornithogalum andinum) and, later another similar species, namely Nothoscordum serenense, was also placed in this genus. In this contribution we corroborate that Latace and Zoellnerallium are names applied to the same taxon, and different from Nothoscordum and Leucocoryne. According to the priority rule, Latace is the name to be used instead of Zoellnerallium. Consequently, the name Latace is reinstated, while Zoellnerallium is relegated to the synonymy, and three new combinations are proposed: Latace andina f. andina, Latace andina f. lutea and Latace serenense. In addition, the chromosome identity of Latace (= Zoellnerallium) and morphological features that support Latace as an independent unit are herein highlighted, and presented together with keys to related genera and to species of Latace; lectotypes, neotypes, a distribution map, and illustrations are also included.

A Taxonomic Revision of Fern Genus Pseudocyclosorus (Thelypteridaceae) from China and the Pan-Himalaya Region, with Special Reference to the Identity of Pseudocyclosorus stramineus

Phytotaxa ◽  
2019 ◽  
Vol 424 (4) ◽  
pp. 197-216
Author(s):  
ZHONG-YANG LI ◽  
XIAN-CHUN ZHANG ◽  
ZHEN-LONG LIANG ◽  
JIE LI
Keyword(s):  
Special Reference ◽  
Species Delimitation ◽  
Morphological Study ◽  
Taxonomic Revision ◽  
Morphological Characters ◽  
Morphological Features ◽  
Similar Species ◽  
Spore Morphology ◽  
Distribution Map ◽  
New Synonyms

The fern genus Pseudocyclosorus (Thelypteridaceae) from China and the Pan-Himalaya region is revised based on morphological study. Reduced basal pinnae, angles between costule and costae, and glands/hairs on abaxial surfaces/indusia are considered as the most diagnostic morphological characters for species delimitation. Genus Trigonospora was excluded from genus Pseudocyclosorus. This segregation is supported by multiple morphological features. Eight species were recognized here, namely Pseudocyclosorus tylodes, P. pseudofalcilobus, P. falcilobus, P. subochthodes, P. stramineus, P. ornatipes, P. esquirolii and P. canus. Twenty-one names were reduced as new synonyms. One name (P. duclouxii) was considered a dubious species. A key to these eight species, their descriptions, spore morphology and distribution map of each species are given.         Pseudocyclosorus stramineus was a long overlooked species, which has always been misidentified as other similar species, and was wrongly reduced as a synonym of P. duclouxii. Here based on morphology characters, the identity of P. stramineus as a species was reclaimed. A more detailed description with photographs and illustrations, and its whole distribution range are given here.

Surface changes in the embryonic interdigital epithelium during the formation of the free digits: a comparative study in the chick and duck foot

Development ◽  
1982 ◽  
Vol 69 (1) ◽  
pp. 251-263
Author(s):  
J. M. Hurle ◽  
E. Colvee
Keyword(s):  
Comparative Study ◽  
Morphological Features ◽  
The Other ◽  
Amniotic Cavity ◽  
Other Hand ◽  
Polygonal Shape ◽  
Surface Changes

The formation of the free digits of the chick is accompanied by conspicuous surface changes of the interdigital ectoderm. These changes were much less pronounced or absent in the duck. As early as the interdigital grooves were detected in the chick, the morphological features of the ectodermal cells changed from a polygonal shape and flattened appearance to a rounded shape and bulging appearance. These changes were not present in the webbed foot of the duck. On the other hand the development of the interdigital commissures was accompanied by the formation of ectodermal ridges consisting of an accumulation of rounded cells which were in some cases in course of detachment to the amniotic cavity. These ridges were very prominent in all the interdigital commissures of the chick. In the duck they were less pronounced and were only present in the first and third commissure. From these results it is suggested that in addition to the well-known interdigital mesenchymal necrotic process (INZ) the ectodermal tissue of the interdigits might also be actively involved in the formation of free digits.

XVI.—The Problem of Chromosome Re-arrangements in Somatic Cells of Drosophila Melanogaster

1946 ◽  
Vol 62 (2) ◽  
pp. 120-127 ◽  
Author(s):  
C. Auerbach
Keyword(s):  
Drosophila Melanogaster ◽  
Germ Cells ◽  
Somatic Cells ◽  
Mature Spermatozoon ◽  
The Other ◽  
New Combinations ◽  
Other Hand

The mechanism by which irradiation produces gross re-arrangements of chromosomes (inversions, translocations, deletions) is now generally believed to occur in two steps: (a) breakage of one or more chromosomes, yielding two or more points of breakage; and (b) reunion of broken ends in a novel combination. Thus the frequency with which a given treatment produces re-arrangements depends not only on the number of breaks produced, but on the circumstances under which reunion takes place. In Drosophila the fertilized ovum seems to offer particularly favourable conditions for breaks produced in the mature spermatozoon to join up into new combinations. In immature germ-cells, on the other hand, re-arrangements are much less readily produced by irradiation (Muller, 1930; Shapiro and Neuhaus, 1933; Shapiro, 1937; Glass, 1939). Evidence for the occurrence of spontaneous or induced re-arrangements in somatic cells of Drosophila is very scanty.

scholarly journals Vicia mingyueshanensis (Fabeae, Papilionoideae, Fabaceae), a new species from western Jiangxi, China

PhytoKeys ◽  
2021 ◽  
Vol 187 ◽  
pp. 71-76
Author(s):  
Zhi-Yong Xiao ◽  
Xiao-Chun Li ◽  
Ying Luo ◽  
Chuan-Sheng Zeng ◽  
Bang-Gui Qiu ◽  
...  
Keyword(s):  
New Species ◽  
Morphological Characters ◽  
The Other ◽  
Mountain Region ◽  
Similar Species ◽  
Distribution Map ◽  
Conservation Assessment ◽  
Morphological Comparison ◽  
Corolla Colour ◽  
A New Species

Vicia mingyueshanensis, a new species from the Mingyue Mountain Region of western Jiangxi, China, is described and illustrated. It is a perennial climbing liana that always links to riparian woods. A morphological comparison indicated that the new species is closely similar to Vicia taipaica K. T. Fu and Vicia dichroantha Diels; however, it differs from the other two species by several salient characters, such as plant indumentum, stipule shape, corolla colour, bractlet shape and calyx shape. Photographs, a preliminary conservation assessment, table of morphological characters and distribution map comparing this new species to two morphologically-similar species are also provided.

scholarly journals Vaucheria species from selected regions in Poland

2014 ◽  
Vol 71 (2) ◽  
pp. 129-139 ◽  
Author(s):  
Joanna Żelazna-Wieczorek
Keyword(s):  
New Taxa ◽  
Morphological Features ◽  
The Other ◽  
Habitat Conditions ◽  
Environmental Preferences ◽  
Central Poland ◽  
Other Hand

Observations on morphological features, distribution and environmental preferences of ten species of the <em>Vaucheria</em> genus are presented on the basis of research carried out between 1989 and 1995 at 42 localities in central Poland, the Opole Silesia, as well as individual sites in Poland. New taxa may be distinguished on the basis of observations of the more comprehensive variability of taxonomic features. Seasonal preferences and habitat conditions that influence the development of sexual organs, which are the basis of taxonomy of this genus, were determined. The following species occurred frequently in the material collected: <em>V. sessilis</em>,<em> V. terrestris</em>, <em>V. geminata</em>, <em>V. hamata</em>. On the other hand: <em>V. dichotoma</em>, <em>V. verticillata</em>, <em>V. aversa</em>, <em>V. undulata</em>, <em>V. walzi</em>, <em>V. woroniniana</em>, were found sporadically throughout the observations.

Monteiroa rubra (Malvaceae: Malvoideae), a New Species Endemic to the Southern Brazilian Grasslands

2019 ◽  
Vol 44 (4) ◽  
pp. 851-856
Author(s):  
Martin Grings ◽  
Sérgio Augusto de Loreto Bordignon ◽  
Ilsi Iob Boldrini
Keyword(s):  
New Species ◽  
Rio Grande ◽  
The Other ◽  
Morphological Description ◽  
Similar Species ◽  
Southern Brazil ◽  
Rio Grande Do Sul ◽  
Distribution Map ◽  
A New Species ◽  
Iucn Criteria

Abstract—Monteiroa rubra is described as a remarkable new species from Rio Grande do Sul, Brazil. It is notably distinct from the other ten species of Monteiroa. The new species is morphologically most similar to the four species of the genus with unlobed leaves that also lack cordate leaf bases. Monteiroa rubra apparently is an endemic species known from three localities in wetlands associated with grasslands in Augusto Pestana and Fontoura Xavier municipalities in southern Brazil. A morphological description, distribution map, photographs, ecological notes, and a key to morphologically most similar species are presented. According to IUCN criteria, if a formal assessment were performed, the new species would probably be considered Endangered.

Sobre la clasificación del complejo Carthamus-Carduncellus (Asteraceae, Cardueae-Centaureinae) y su tratamiento en Flora Iberica. On the classification of Carthamus-Carduncellus Complex (Asteraceae, Cardueaecentaureinae) and its treatment in Flora Iberica

2012 ◽  
Vol 37 ◽  
pp. 79-92 ◽  
Author(s):  
Ginés López González
Keyword(s):  
Woody Plants ◽  
Mediterranean Region ◽  
Western Mediterranean ◽  
The Other ◽  
New Combinations ◽  
Annual Plants ◽  
East Mediterranean ◽  
Molecular Analyses ◽  
Other Hand

Español. Después de analizar las alternativas de clasificación del complejo Carthamus-Carduncellus que son compatibles con los resultados de los análisis moleculares, se propone volver a la clasificación en dos géneros de Hanelt (1963) modificada por la inclusión de Carthamus sect. Thamnacanthus (DC.) Hanelt en Carduncellus Adans.; se incluye Femeniasia Susanna, no estudiada por Hanelt, en Carduncellus. Se hacen las nuevas combinaciones Carduncellus rhiphaeus (Font Quer & Pau) G. López, Carduncellus balearicus (J. J. Rodr.) G. López, Carduncellus sect. Thamnacanthus (DC.) G. López y C. hispanicus subsp. intercedens (Degen & Hervier) G. López. Se describe la nueva serie Carduncellus ser. Fruticosi G. López, y las variedades C. monspelliensium var. almeriensis G. López & var. valentinus G. López. Carthamus L., tal como aquí se delimita, esta formado únicamente por plantas anuales que tienen las cipselas externas epaposas (muy raramente con vilano), y el resto con un vilano persistente formado por cerdas anchas, paleáceas, linear-lanceoladas o espatuladas. Carduncellus Adans., por plantas perennes, herbáceas o leñosas en las que todas las cipselas tienen vilano (muy raramente pueden ser epaposas), siendo el vilano persistente o frecuentemente caduco, formado por cerdas estrechamente lineares. Carthamus es del Mediterráneo oriental y O. de Asia , y Carduncellus Adans. está centrado biogeográficamente en el Mediterráneo occidental.English.  Different alternative classifications congruent with the molecular analyses of the complex Carthamus-Carduncellus are discussed. It is proposed to return to the traditional Hanel (1963) classification, but with Carthamus sect. Thamnacanthus (DC.) Hanelt included in Carduncellus Adans.; the genus Femeniasia Susanna, not studied by Hanelt, is also included in Carduncellus. The new combinations Carduncellus rhiphaeus (Font Quer & Pau) G. López, Carduncellus balearicus (J. J. Rodr.) G. López, Carduncellus sect. Thamnacanthus (DC.) G. López and C. hispanicus subsp. intercedens (Degen & Hervier) G. López are proposed. The new serie Carduncellusser. Fruticosi G. López, and the varieties C. monspelliensium var. almeriensis G. López & var. valentinus G. López are described. Carthamus L., as delimited here, include only annual plants having outer cypselas without pappus (rarely all epappose) and the rest with a persistent pappus of wide, paleaceous, linear-lanceolate o spatulate bristles. Carduncellus Adans., on the other hand, include perennial herbaceous or woody plants having all the cypselas with pappus (very rarely epappose), the pappus, persistent or deciduous, of narrow linear bristles. Carthamus L. is of East Mediterranean and West Asia origin, and Carduncellus Adans. has its center in the western Mediterranean region. 

A new species of Mandevilla (Apocynaceae; Apocynoideae) from Mexico

Phytotaxa ◽  
2017 ◽  
Vol 319 (1) ◽  
pp. 93
Author(s):  
LEONARDO O. ALVARADO-CÁRDENAS ◽  
LUCIO LOZADA-PÉREZ
Keyword(s):  
New Species ◽  
Central America ◽  
Conservation Status ◽  
The Other ◽  
Similar Species ◽  
Distribution Map ◽  
A New Species

We describe and illustrate a new species of Mandevilla for the states of Oaxaca and Veracruz, Mexico. Mandevilla sherlockii sp. nov. can be separated from the other similar species of the genus by its subcoriaceous leaf blades and inflorescences with a conspicuously curved rachis between each flower. Including this new species, Mexico is a hotspot for the genus with a 24 species, 11 of which are endemic. We provide a distribution map, suggest a conservation status for the new species, and provide a key for the species of Mandevilla found in Mexico and Central America.

scholarly journals A New Species of Randia (Rubiaceae) and the Taxonomic Significance of Foliar Anatomy in the Species of Randia of the Southern Cone of America

2020 ◽  
Vol 45 (3) ◽  
pp. 607-619 ◽  
Author(s):  
Marina D. Judkevich ◽  
Ana M. Gonzalez ◽  
Roberto M. Salas
Keyword(s):  
New Species ◽  
Vascular Tissue ◽  
Southern Cone ◽  
The Other ◽  
Similar Species ◽  
Distribution Map ◽  
Mato Grosso ◽  
Tissue Organization ◽  
Mato Grosso Do Sul ◽  
A New Species

Abstract―Randia heteromera is a new species described based on studies of taxonomy and vegetative anatomy (leaf, stipule, and colleters). This species is illustrated and diagnosed in comparison to the other four similar species of Randia in the Southern Cone of America. The species grows in areas of humid forests, locally known as the humid Chaco in the southern part of its distribution (Argentina and Paraguay), and in seasonal forests in the northern part, in northeast Paraguay and the south of Mato Grosso do Sul in Brazil. We present a key to distinguish R. heteromera from the other species of the Southern Cone of America. The species was also compared with similar taxa, Randia nitida or R. hebecarpa, occasionally used to identify material from the Southern Cone of America. A distribution map is provided. The anatomical data studied had a taxonomic value at the species level. In addition, based on the leaf anatomy studies carried out in the present study and in previous studies, three new types of vascular tissue organization in the leaf are described for Rubiaceae.

scholarly journals Ex ante efficiency of structured bargaining procedures under coordination failure among creditors

2012 ◽  
Vol 9 (3) ◽  
pp. 394-406
Author(s):  
Kenta Toyofuku
Keyword(s):  
Moral Hazard ◽  
The Other ◽  
Priority Rule ◽  
Coordination Failure ◽  
Noisy Signal ◽  
Coordination Problem ◽  
Absolute Priority ◽  
Other Hand ◽  
Ex Ante ◽  
The Absolute

We analyze the ex-ante efficiency of structured bargaining procedures, especially the absolute priority rule (APR) violations and the revocation of preferential payments (PP). We show that when creditors receive clear signals about firms, the debtor is more likely to choose a risky action if APR violations are adopted. On the other hand, when a noisy signal is transmitted to creditors, a high liquidation value may induce coordination failure among creditors. Because this also induces moral hazard on the part of the debtor, adopting APR violations may be a useful way of improving ex ante efficiency. Finally, if there is complementarity between a firm’s assets, the revocation of PP can mitigate the coordination problem and thus increase ex ante efficiency.

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