The Genus Lolium in Australia

1983 ◽  
Vol 31 (4) ◽  
pp. 421 ◽  
Author(s):  
PM Kloot
Keyword(s):  
Key Species ◽  
Outcrossing Species ◽  
Diagnostic Key ◽  
Species Descriptions

The genus Lolium is represented in Australia by the following five species: L. perenne, L. multiflorum, L. rigidum, L. loliaceum and L. temulentum. L. remotum is probably extinct in Australia as it has been found only associated with flax crops which are no longer grown locally. Natural and bred hybrids between the three outcrossing species are also found, viz. L. multiflorum × L. perenne (= L. × hybridum), L. multijlorum × L. rigidum and L, perenne × L. rigidum. Earlier botanical treatments of the genus in Australia are reviewed. A diagnostic key, species descriptions and ecological notes are presented.

scholarly journals A taxonomic revision of Curarea Barneby & Krukoff (Menispermaceae)

PhytoKeys ◽  
2018 ◽  
Vol 100 ◽  
pp. 9-89
Author(s):  
Rosa del C. Ortiz
Keyword(s):  
Multivariate Analysis ◽  
Atlantic Forest ◽  
Taxonomic Revision ◽  
New Combinations ◽  
Conservation Assessment ◽  
Plant Family ◽  
Distribution Maps ◽  
Quantitative Characters ◽  
Key Species ◽  
Species Descriptions

A monograph of Curarea, a neotropical genus in the plant family Menispermaceae, is presented. Curarea is distinguished from related genera by the combination of staminate flowers with sepals in two whorls and pistillate flowers with three petals, three carpels and usually elongated carpophores bearing three sessile drupelets. Nine species are recognised, amongst them two new to science, C.gentryana from Ecuador and C.barnebyana, from Ecuador and Peru. Additionally, two new combinations, C.iquitana and C.tomentocarpa, are proposed for distinct taxa recovered in a multivariate analysis of quantitative characters of the broadly distributed and morphologically variable C.toxicofera. The anatomy and morphology of species in the genus is documented, identification key, species descriptions, distribution maps and a preliminary conservation assessment for all accepted species are also provided. Of the nine species recognised here, C.barnebyana is assigned a preliminary status of Vulnerable, C.crassa (known only from the coastal Atlantic Forest in Brazil) and C.gentryana (endemic to western Ecuador) are both assigned a preliminary status of Endangered.

scholarly journals Afrotropical species of the genus Sculptolobus Yang, van Achterberg & Chen (Hymenoptera, Braconidae, Braconinae)

2021 ◽  
Vol 84 ◽  
pp. 301-325
Author(s):  
Konstantin Samartsev ◽  
Cornelis van Achterberg
Keyword(s):  
New Combinations ◽  
Diagnostic Key ◽  
Species Descriptions

A review of the Afrotropical species of the genus Sculptolobus Yang, van Achterberg & Chen, 2008 is presented. One species, S. lelejisp. nov., and one subspecies, S. lembaensis hartenissp. nov., are described. New combinations are proposed for S. bipustulatus (Szépligeti, 1913), comb. nov., S. lembaensis (Cameron, 1912), comb. nov., S. somnialis (Szépligeti, 1913), comb. nov., S. suavis (Szépligeti, 1918), comb. nov., and S. subellipticus (Granger, 1949), comb. nov. Lectotypes are designated for S. lembaensis and S. suavis. For all species descriptions and illustrations are provided together with a diagnostic key.

TAXONOMIC SYNOPSIS OF BROMUS SECTION BROMOPSIS (GRAMINEAE) IN ALASKA

1967 ◽  
Vol 45 (8) ◽  
pp. 1309-1313 ◽  
Author(s):  
Wm. W. Mitchell
Keyword(s):  
Distribution Maps ◽  
Taxonomic Key ◽  
Key Species ◽  
Species Descriptions ◽  
Generalized Distribution

The taxonomy of the genus Bromus section Bromopsis in Alaska is summarized. With recent changes incorporated in the treatment the section now includes B. ciliatus (2n = 14), B. richardsonii (2n = 28), B. pacificus (2n = 28), B. pumpellianus ssp. pumpellianus (2n = 56), and B. pumpellianus ssp. dicksonii (2n = 28), all indigenous, and B. inermis (2n = 56), an introduction. A taxonomic key, species descriptions, and comments are provided along with generalized distribution maps of the indigenous taxa.

On the Linear Geometry of Lanthanide Hydroxide (Ln—OH, Ln=La-Lu)

2019 ◽  
Author(s):  
Hassan Harb ◽  
Lee Thompson ◽  
Hrant Hratchian
Keyword(s):  
Triple Bond ◽  
Density Functional ◽  
Valence Electron ◽  
Density Functional Theory Calculations ◽  
Electron Configuration ◽  
Functional Theory ◽  
Key Species ◽  
Pi Orbitals ◽  
Lanthanide Hydroxide ◽  
Linear Geometry

Lanthanide hydroxides are key species in a variety of catalytic processes and in the preparation of corresponding oxides. This work explores the fundamental structure and bonding of the simplest lanthanide hydroxide, LnOH (Ln=La-Lu), using density functional theory calculations. Interestingly, the calculations predict that all structures of this series will be linear. Furthermore, these results indicate a valence electron configuration featuring an occupied sigma orbital and two occupied pi orbitals for all LnOH compounds, suggesting that the lanthanide-hydroxide bond is best characterized as a covalent triple bond.

On the Linear Geometry of Lanthanide Hydroxide (Ln—OH, Ln=La-Lu)

2019 ◽  
Author(s):  
Hassan Harb ◽  
Lee Thompson ◽  
Hrant Hratchian
Keyword(s):  
Triple Bond ◽  
Density Functional ◽  
Valence Electron ◽  
Density Functional Theory Calculations ◽  
Electron Configuration ◽  
Functional Theory ◽  
Key Species ◽  
Pi Orbitals ◽  
Lanthanide Hydroxide ◽  
Linear Geometry

Lanthanide hydroxides are key species in a variety of catalytic processes and in the preparation of corresponding oxides. This work explores the fundamental structure and bonding of the simplest lanthanide hydroxide, LnOH (Ln=La-Lu), using density functional theory calculations. Interestingly, the calculations predict that all structures of this series will be linear. Furthermore, these results indicate a valence electron configuration featuring an occupied sigma orbital and two occupied pi orbitals for all LnOH compounds, suggesting that the lanthanide-hydroxide bond is best characterized as a covalent triple bond.

A new genus of Orphninae (Coleoptera: Scarabaeidae) from Madagascar

2009 ◽  
Vol 18 (1) ◽  
pp. 65-69
Author(s):  
A.V. Frolov ◽  
O. Montreuil
Keyword(s):  
New Genus ◽  
Fore Tibia ◽  
Costal Margin ◽  
Diagnostic Key

A new genus, Renorphnus gen. n, is established for the Madagascar species Orphnus clementi Petrovitz. The new genus differs from other representatives of Orphninae in distinctive shape of the fore tibia of male, shape of clypeus, presence of 2 more or less prominent tubercles on pronotum in both sexes, and widened and pectinate setae on costal margin of wings. Orphnus clementi is redescribed. Diagnostic key to Madagascar Orphninae genera is given.

Systematics and evolution of Nepenthes

2018 ◽  
Author(s):  
Charles Clarke ◽  
Jan Schlauer ◽  
Jonathan Moran ◽  
Alastair Robinson
Keyword(s):  
Southeast Asia ◽  
Analytical Methods ◽  
Best Practice ◽  
Species Concept ◽  
Reticulate Evolution ◽  
Ecological Information ◽  
Plastid Genomes ◽  
The Status ◽  
Species Descriptions ◽  
Adequate Research

Nepenthes is a genus of 130-160 species, almost half of which were described after 2001. The recent, rapid increase in species descriptions has been driven by application of a less rigorous species concept by botanists, taxonomic inflation, and discoveries of new taxa during explorations of remote parts of Southeast Asia. Many recently published species descriptions of Nepenthes are based entirely upon qualitative morphological information and are not supported by adequate research. Accordingly, the status of many Nepenthes taxa is contested. Evolution within the genus is not well understood, because nuclear and maternally inherited plastid genomes cannot resolve relationships between many species, particularly those that evolved recently through introgression or reticulate evolution. Improvement in our understanding of the systematics and evolution of Nepenthes requires the adoption of ‘best practice’ collection and preservation methods, and the application of quantitative analytical methods for morphological, genetic, and ecological information.

On a new Temnocephala (Platyhelminthes) from Southern Patagonia (Chile, Argentina), with a redescription of T. chilensis and some systematic and biogeographical insights

Zootaxa ◽  
2020 ◽  
Vol 4852 (3) ◽  
pp. 383-395
Author(s):  
RODRIGO PONCE DE LEÓN ◽  
ERICH H. RUDOLPH ◽  
ODILE VOLONTERIO
Keyword(s):  
New Species ◽  
Geographic Distribution ◽  
Southern Chile ◽  
Host Preferences ◽  
Southern Patagonia ◽  
Diagnostic Key ◽  
A New Species

To date, only one species of Temnocephala is known from Chile, Temnocephala chilensis, and three from southern Argentina (Patagonia), namely T. chilensis, Temnocephala dionii, and Temnocephala mexicana. Here we describe a new species of Temnocephala and provide an updated description of T. chilensis based on material found on an anomuran crab (Aeglidae) from southern Chile. Additional hosts and localities are reported for both species in southern Argentina and Chile, and a diagnostic key for all species of Temnocephala hosted on Aegla and Parastacidae is included as well. In southern Chile, both T. chilensis and the new species were found on the crayfish Samastacus spinifrons and on the anomuran crabs Aegla abtao and Aegla alacalufi; in addition, the new species was found on Aegla manni, and T. chilensis on Aegla rostrata. In southern Argentina, T. chilensis and the new species were found on Aegla riolimayana and S. spinifrons. Based on their shared traits (morphology of the penial stylet, host preferences and geographic distribution), the temnocephalans hosted in Aegla are tentatively gathered into two clusters, the Chilensis and Axenos groups. 

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