scholarly journals Re-instatement of Sorbus harrowiana (Rosaceae), based on morphometric analysis

PhytoKeys ◽  
2020 ◽  
Vol 166 ◽  
pp. 29-39
Author(s):  
Meng Li ◽  
Steven P. Sylvester ◽  
Zhang-Pei Wang ◽  
Yi-Da Pei ◽  
Xin-Fen Gao ◽  
...  
Keyword(s):  
Morphometric Analysis ◽  
Field Investigation ◽  
Flora Of China ◽  
First Time

Sorbus harrowiana (≡Pyrus harrowiana), previously considered a synonym of Sorbus insignis (≡Pyrus insignis) in the Flora of China, is re-instated here and shown to be distinct from S. insignis, based on morphometric analysis, coupled with herbarium and field investigation. We also present for the first-time full descriptions, distributional records and notes for S. harrowiana and S. insignis.

scholarly journals Flueggea acicularis (Phyllanthaceae), a narrow endemic species rediscovered in central China

PhytoKeys ◽  
2021 ◽  
Vol 172 ◽  
pp. 57-66
Author(s):  
Songzhi Xu ◽  
Qiliang Gan ◽  
Lianzhong Fu ◽  
Mingxi Jiang ◽  
Zhenyu Li
Keyword(s):  
Conservation Status ◽  
Field Investigation ◽  
Iucn Red List ◽  
Central China ◽  
Karst Region ◽  
Morphological Description ◽  
Chongqing Municipality ◽  
Iucn Red List Criteria ◽  
First Time ◽  
A New Species

Flueggea acicularis (Phyllanthaceae) is endemic to the karst region of central China. Male specimens of this species were first collected in 1908. In 1989, female plants of F. acicularis were found for the first time, but misidentified as a new species. Throughout this period the male plants of F. acicularis were mismatched with female plants of other species, and male plants had not been collected since 1908. Then, in March, 2009, the authors rediscovered a wild population of F. acicularis consisting of both male and female plants in Wuxi county, Chongqing municipality, China. Based on field investigation and examination of specimens, we matched the correct female and male plants of this species for the first time since its initial publication a century ago. A complete and accurate morphological description, distribution, habitat and phenology of this species are also provided. Furthermore, the conservation status of F. acicularis is assessed as “Near Threatened” (NT) according to the IUCN Red List criteria.

scholarly journals On two species of Riocypris (Crustacea, Ostracoda) from northern Patagonia and their relation to Eucypris fontana: implications in paleoenvironmental reconstructions

2018 ◽  
Vol 96 (8) ◽  
pp. 801-817 ◽  
Author(s):  
C.A. Coviaga ◽  
A.P. Pérez ◽  
L.Y. Ramos ◽  
P. Alvear ◽  
G.C. Cusminsky
Keyword(s):  
Sexual Dimorphism ◽  
Morphometric Analysis ◽  
Indicator Species ◽  
Taxonomic Status ◽  
Geometric Morphometric ◽  
Comparative Analyses ◽  
Northern Patagonia ◽  
Geometric Morphometric Analysis ◽  
The Individual ◽  
First Time

Two species of ostracods new to Patagonia, Argentina, are described. One of them, Riocypris whatleyi sp. nov., is described for the first time, and the second, Riocypris sarsi (Daday, 1902) comb. nov., is reallocated from genus Eucypris to genus Riocypris. Inter- and intra-specific variations in shape, size, and sexual dimorphism were evaluated based on geometric morphometric analysis. Moreover, morphological and morphometric comparative analyses were applied to re-examine living and quaternary specimens recovered from previous studies. Based on these results, a generic reassignment for the Patagonian Eucypris fontana (Jurine, 1820) into the genus Riocypris is proposed. Contributing to the knowledge on the systematic and autecology of this enigmatic species, widely distributed in Patagonia and frequently used in paleolimnological reconstructions, generates science-based evidence for their use as indicator species. Additionally, our results emphasize the usefulness of studying the living representatives (i.e., with valves and appendages) for elucidating the taxonomic status of the individual specimens, especially those present in paleontological records and used as bioproxies in paleolimnological studies.

The karyotype of Sorex arcticus maritimensis (Insectivora, Soricidae) and its systematic implications

1988 ◽  
Vol 66 (9) ◽  
pp. 1968-1972 ◽  
Author(s):  
V. T. Volobouev ◽  
C. G. van Zyll de Jong
Keyword(s):  
Morphometric Analysis ◽  
Banding Pattern ◽  
Diploid Number ◽  
Sorex Araneus ◽  
Exact Nature ◽  
Full Understanding ◽  
Monophyletic Origin ◽  
Fundamental Number ◽  
First Time

The chromosomes of Sorex arcticus maritimensis are described for the first time and their banding pattern (R- and C-bands) compared with those of Sorex araneus. The results provide further evidence for the monophyletic origin of the araneus–arcticus group and clearly indicate that the primary mechanisms of chromosomal reorganization in this group have been Robertsonian and tandem translocations. The basic karyotype of S. a. maritimensis was found to differ from that of S. a. arcticus in having a different fundamental number (34 vs. 38) but the same diploid number. A full understanding of the karyotypic differences between these taxa requires further work. Whatever the exact nature of the differences, they increase the likelihood of an independent specific status for S. a. maritimensis as suggested by the results of an earlier morphometric analysis.

Mayacaceae, a newly naturalized family for the Flora of China

Phytotaxa ◽  
2020 ◽  
Vol 447 (1) ◽  
pp. 77-80
Author(s):  
FAN SU ◽  
YA-NAN GUO ◽  
XIN-XIN ZHOU ◽  
RUI-JIANG WANG
Keyword(s):  
Aquatic Plant ◽  
Guangdong Province ◽  
Morphological Description ◽  
Taxonomic Identification ◽  
Flora Of China ◽  
Tropical America ◽  
First Time

Mayaca fluviatilis, an aquatic plant belonging to the monogeneric family Mayacaceae, native to tropical America, is reported here for the first time to be naturalized in Guangdong province, China. A morphological description, with detailed photographs, is provided for further taxonomic identification. Its invasive risk is evaluated according to its present propagation tendency.

Macrobiotus derkai, a new species of Tardigrada (Eutardigrada, Macrobiotidae, huziori group) from the Colombian Andes (South America)

Zootaxa ◽  
2008 ◽  
Vol 1731 (1) ◽  
pp. 1 ◽  
Author(s):  
PETER DEGMA ◽  
ŁUKASZ MICHALCZYK ◽  
ŁUKASZ KACZMAREK
Keyword(s):  
New Species ◽  
South America ◽  
Sierra Nevada ◽  
Morphometric Analysis ◽  
Similar Species ◽  
Moss Sample ◽  
Colombian Andes ◽  
Alpine Zone ◽  
First Time ◽  
A New Species

A new species, Macrobiotus derkai sp. nov., is described from a moss sample collected in the alpine zone of Sierra Nevada del Cocuy Mts (NE Colombia). It differs from the most similar species, Macrobiotus huziori Michalczyk & Kaczmarek, 2006 mainly in the location of the second macroplacoid and in the dimensions of accessory points on the claws. Eggs of the new species have the same type of areolation as eggs of M. huziori but they differ from the latter in the size and number of processes. The differences between the new species and others having similar number and shape of placoids are discussed. An identification key for these species is also provided. A round depression on the dorsal head cuticle is reported in Tardigrada for the first time. The results of a morphometric analysis of the new species are also given.

scholarly journals Spatial phylogenetics of the Chinese angiosperm flora provides insights into endemism and conservation

2020 ◽  
Author(s):  
Xiao-Xia Zhang ◽  
Jian-Fei Ye ◽  
Shawn W. Laffan ◽  
Brent D. Mishler ◽  
Andrew H. Thornhill ◽  
...  
Keyword(s):  
Evolutionary History ◽  
Northern China ◽  
Western China ◽  
Conservation Priorities ◽  
Generic Level ◽  
Mountainous Regions ◽  
Operational Taxonomic Units ◽  
Flora Of China ◽  
First Time ◽  
Centers Of Endemism

Abstract Background : The flora of China is well known for its high diversity and endemism. Identifying centers of endemism and designating conservation priorities are essential goals for biodiversity studies. We implemented a spatial phylogenetic analysis of the Chinese angiosperm flora at the generic level to identify centers of neo- and paleo-endemism. Phylogenetic endemism (PE) centers were compared with taxonomic endemism centers, and their implications for conservation were examined. Results: (1) The majority of grid cells in China with significant PE showed concentrations of mixed- or paleo-endemism and were mainly located in the mountainous regions. (2) Nine geographic centers of endemism were identified for 3,513 operational taxonomic units (OTUs). Four of these, located in northern and western China, were recognized for the first time. (3) Arid and semiarid regions were commonly linked to significant PE, as has been found in other spatial phylogenetics studies worldwide. (4) Six high-priority conservation gaps were detected by overlaying the boundaries of China’s nature reserves on all significant PE cells. Conclusions: Mountainous regions are both “museums” and “cradles” for Chinese angiosperms, including the mountains of southern and northern China. The areas we highlight as priorities are important for broad-scale conservation planning, especially in the context of evolutionary history preservation.

scholarly journals Spatial phylogenetics of the Chinese angiosperm flora provides insights into endemism and conservation

2019 ◽  
Author(s):  
Xiao-Xia Zhang ◽  
Jian-Fei Ye ◽  
Shawn W. Laffan ◽  
Brent D. Mishler ◽  
Andrew H. Thornhill ◽  
...  
Keyword(s):  
Grid Cell ◽  
Northern China ◽  
Tibet Plateau ◽  
Conservation Priorities ◽  
Grid Cells ◽  
Flora Of China ◽  
Integrated Methods ◽  
Qinghai Tibet Plateau ◽  
First Time ◽  
Centers Of Endemism

Abstract Background The flora of China is well known for its high endemism. Identifying centers of endemism and designating conservation priorities for the Chinese flora are essential goals for biodiversity studies. We used a phylogeny that included 2,909 Chinese angiosperm genera and 1.39 million spatial distribution records to conduct spatial phylogenetics analyses. Then, we identified centers of neo- and paleo-endemism in the Chinese angiosperm flora using spatial phylogenetic methods. Phylogenetic endemism centers were compared with taxonomic endemism centers, and their implications for conservation were examined. Results (1) The majority of grid cells with significant phylogenetic endemism (PE) were dominated by mixed- or super-endemism in China, but only one grid cell dominated by neo-endemism was located in the Qinghai–Tibet Plateau. (2) Ten geographic centers of grid cells with high PE were identified. Four of these found in northern China are recognized for the first time here. (3) Arid and semiarid regions were commonly linked to PE centers in both our study and other spatial phylogenetics studies worldwide. (4) Five priority conservation gaps were detected by overlaying the boundaries of China’s nature reserves on these centers of endemism. Conclusions The spatial phylogenetics approach provides an evolutionary perspective to understanding the diversity and endemism patterns. These integrated methods are necessary for broad-scale conservation planning, especially when aiming to conserve evolutionary history.

Morphometric analysis of mice uteri treated with the preservatives methyl, ethyl, propyl, and butylparaben

2004 ◽  
Vol 20 (6-10) ◽  
pp. 123-132 ◽  
Author(s):  
C Lemini ◽  
A Hernández ◽  
R Jaimez ◽  
Y Franco ◽  
ME Avila ◽  
...  
Keyword(s):  
Morphometric Analysis ◽  
Luminal Epithelium ◽  
Methyl Ethyl ◽  
Alkyl Esters ◽  
Histological Changes ◽  
Present Evidence ◽  
Cd1 Mice ◽  
First Time

The alkyl esters of p-hydroxybenzoic acid (PHBA) known as parabens (Pbens) are widely used as preservatives in food, pharmaceuticals, and cosmetics. Several in vivo and in vitro studies have shown these compounds to be estrogenic. Here, for the first time, we present evidence of their estrogenicity using a morphometric analysis of uteri from mice treated with the preservatives methylparaben (MePben), ethylparaben (EtPben), propylparaben (PrPben), and butylparaben (BuPben) compared with estradiol (E2). Different groups of adult ovariectomized (Ovx) CD1 mice were subcutaneously (sc) treated daily for three days with two different equimolar doses (362 and 1086 mmol/kg) of the Pbens: MePben (55 and 165 mg/kg), EtPben (60 and 180 mg/kg), PrPben (65 and 195 mg/kg), BuPben (70 and 210 mg/kg), E2 (10 mg/kg; 0.036 mmol/kg), and vehicle (propyleneglycol; V, 10 mL/kg). On the fourth day, uteri were dissected, blotted, weighed, and placed in a fixative solution for 24 h. The paraffin embeded uteri were cut to obtain 7 mm thick transversal sections. Luminal epithelium heights (LEH), glandular epithelium heights (GEH), and myometrium widths (MW) were measured. The highest Pbens dose was able to produce uterotrophic effects (38 to 76%) compared to E2 efects (100%). The relative uterotrophic potency to E2 (100) was from 0.02 to 0.009. Significant increases ( P <0.05) in LEH, GEH, and MW as compared with V were obtained: LEH from 87 to 113% (E2 153%), GEH from 10 to 40% (E2 60%), and MW from 35 to 43% (E2 88%). These results confirm that Pbens at the doses assayed here induce estrogenic histological changes in the uteri of Ovx mice.

Examination of CPT-Based Liquefaction Evaluation Methods for New Zealand Earthquake

2013 ◽  
Vol 477-478 ◽  
pp. 1105-1108
Author(s):  
Tong Zhi Chen ◽  
Xiao Ming Yuan
Keyword(s):  
New Zealand ◽  
Test Data ◽  
Historical Earthquakes ◽  
Evaluation Methods ◽  
Field Investigation ◽  
The Other ◽  
Success Rates ◽  
In Situ Test ◽  
First Time

On February 22, 2011 a MW6.2 earthquake struck Christchurch in New Zealand, which is the first time that liquefaction acts as the main cause of damage since there is survey record of historical earthquakes. On the basis of field investigation and in-situ test data, domestic and foreign liquefaction evaluation methods based on CPT including Chinese code, Robertson and Olsen methods are examined and their applicability and reliability are assessed. Analysis shows that the method adopted in Chinese code is more dangerous, whose success rates of liquefaction and non-liquefaction evaluation are 70% and 94%.The other two methods abroad are severely conservative, for the success rates of liquefaction and non-liquefaction evaluation of Robertson method are 100% and 40%, and Olsen method 100% and 11% respectively. Liquefaction evaluation methods need further research to be improved.

scholarly journals Sedimentology, stratigraphy, and glacier dynamics, western scottish Highlands

2007 ◽  
Vol 68 (1) ◽  
pp. 79-95 ◽  
Author(s):  
Nicholas R. Golledge
Keyword(s):  
Field Investigation ◽  
Geological Mapping ◽  
X Ray Diffraction ◽  
Glacial Sediments ◽  
Scottish Highlands ◽  
Sedimentary Sequences ◽  
Glacier Dynamics ◽  
Glacier Advance ◽  
Increasing Precipitation ◽  
First Time

AbstractGlacial sediments of the western Scottish Highlands are comprehensively described and characterized here for the first time, enabling the first glacial stratigraphy for the area to be proposed. This classification is based on the results of extensive geological mapping and field investigation of sedimentary sequences and their structures, X-ray diffraction and particle size distribution analyses, and comparison with deposits formed in contemporary glaciated environments. These new data are subsequently appraised in terms of their implications for late Pleistocene glacier evolution and dynamics. Together, the data suggest that much of the landscape is palimpsest, and can be attributed to the Weichselian (Late Devensian) glaciation. Subsequent glacier advance during the Younger Dryas did little to modify the area, suggesting that ice flow was dominated by sliding on a meltwater-lubricated rigid bed, with deformation of basal sediments playing a more limited role. Final deglaciation was marked by a significant increase in basal meltwater flux, reflecting the warming climate and increasing precipitation. These new palaeoglaciological and palaeoenvironmental insights advance our understanding of former glacier dynamics in the western Scottish Highlands, improve our knowledge of Pleistocene landscape evolution of this area, and enable comparisons to be made with sedimentary sequences elsewhere.

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