scholarly journals Taxonomic Studies on Some Freshwater Diatoms from the Eastern Terai Region, Nepal

Our Nature ◽  
1970 ◽  
Vol 4 (1) ◽  
pp. 10-19 ◽  
Author(s):  
S. K. Rai
Keyword(s):  
Key Words ◽  
New Records ◽  
Diatom Species ◽  
Cyclotella Meneghiniana ◽  
Freshwater Diatoms ◽  
Taxonomic Studies ◽  
Freshwater Diatom

The present paper describes the morphology and distribution of 17 freshwater diatom species (Bacillariophyceae) collected from rivers, ponds, ditches and wetlands of the eastern Terai region, Nepal. They belong to the genera Cyclotella (1), Ceratoneis (1), Fragilaria (1), Eunotia (1), Navicula (3), Pinnularia (1), Gyrosigma (1), Gomphonema (2), Cymbella (3), Epithemia (1), and Hantzschia (2). Cyclotella meneghiniana Kuetz., Ceratoneis arcus (Ehr.) Kuetz., Fragilaria capucina Desmaz. var. mesolepta Rabenh., Eunotia lunaris (Ehr.) Grun., Navicula perrotettii Grun., Gomphonema lanceolatum fo. turris (Ehr. c.p.) Hust., and Cymbella tumida (Bréb.) Van. Heurck have previously been reported from the eastern Terai region but Navicula radiosa Kuetz., Gyrosigma kuetzingii (Grun.) Cl., Gomphonema sphaerophorum Ehr., Cymbella aspera (Ehr.) Cl, and Hantzschia amphioxys (Ehr.) Grun. var. capitata Muell. are new records for this area. Navicula gastrum Ehr., Pinnularia viridis (Nitzs.) Ehr. var. intermedia Cl., Cymbella reinhardtii Grun., Hust., Epithemia sorex Kuetz. and Hantzschia virgata (Roper) Grun. are new records for Nepal. Key words: Algae, Bacillariophyceae, freshwater diatoms, Terai, Nepal doi:10.3126/on.v4i1.498 Our Nature Vol.4(1) 2006 pp10-19

scholarly journals Diatom diversity and distribution in Madeira Island streams (Portugal)

2020 ◽  
Vol 8 ◽  
Author(s):  
Catarina Ritter ◽  
Pedro Raposeiro ◽  
Vítor Gonçalves
Keyword(s):  
New Records ◽  
Distribution Patterns ◽  
Diatom Species ◽  
Diatom Assemblages ◽  
Field Campaign ◽  
Madeira Island ◽  
Madeira Archipelago ◽  
Freshwater Diatoms ◽  
Freshwater Diatom

Here, we present the data obtained from the samples collected in a field campaign during the spring of 2015 which aims for a better understanding of the diversity and distribution patterns of freshwater diatoms in Madeira Island. Following European and Portuguese standards and recommendations for routine diatom sampling and analysis, we collected samples in 40 sites, distributed in 27 permanent streams and identified the diatom species present, using general diatom floras and studies in Portuguese freshwater diatoms. Little is known about the diversity and distribution of freshwater diatom assemblages from Madeira Archipelago. This study reports a survey in 40 sites in Madeira Island distributed in 27 permanent streams. A total of 965 diatom (Bacillariophyta) occurrences were recorded, belonging to 130 different taxa from 44 genera and 27 families. The families with the highest number of occurrences were Bacillariaceae (176), Achnanthidiaceae (135) and Naviculaceae (133). The two diatom endemisms, described previously in Madeira Island (Lange-Bertalot 1993), Nitzschia macaronesica Lange-Bertalot and Navicula madeirensis Lange-Bertalot, were only observed in a small number of sites, located mostly at Laurissilva forest. Sixty species are new records, not only to Madeira Island, but also to the Madeira Archipelago.

Halamphora daochengensis sp. nov., a new freshwater diatom species (Bacillariophyceae) from a small mountain lake, Sichuan Province, China

Phytotaxa ◽  
2019 ◽  
Vol 404 (1) ◽  
pp. 12 ◽  
Author(s):  
WEI ZHANG ◽  
TING WANG ◽  
ZLATKO LEVKOV ◽  
INGRID JÜTTNER ◽  
LUC ECTOR ◽  
...  
Keyword(s):  
New Species ◽  
Nature Reserve ◽  
Sichuan Province ◽  
Mountain Lake ◽  
Morphological Description ◽  
Similar Species ◽  
Dorsal Margin ◽  
Diatom Species ◽  
Freshwater Diatoms ◽  
Freshwater Diatom

During a survey of freshwater diatoms from a mountain lake, Lake Congqiancuo, Haizishan Nature Reserve, Yading, Daocheng County, Sichuan Province, China, a new Halamphora species, Halamphora daochengensis sp. nov. was found. A detailed morphological description of the new species is presented, based on light and scanning electron microscopy. The main features of H. daochengensis are dorsiventral, semi-lanceolate valves with a strongly triundulate dorsal margin and valve ends distinctly protracted and capitate. The new species is compared with other similar species including Halamphora dusenii and H. normanii var. undulata which differ in size, valve shape, stria density and ultrastructure.

scholarly journals Gomphonema svalbardense sp. nov., a new freshwater diatom species (Bacillariophyta) from the Arctic Region

Phytotaxa ◽  
2014 ◽  
Vol 170 (4) ◽  
pp. 250 ◽  
Author(s):  
Eveline Pinseel ◽  
Katerina Kopalova ◽  
Bart Van de Vijver
Keyword(s):  
Central Area ◽  
Arctic Region ◽  
The Arctic ◽  
Similar Species ◽  
New Taxon ◽  
Diatom Species ◽  
Svalbard Archipelago ◽  
Freshwater Diatoms ◽  
Freshwater Diatom ◽  
The Arctic Region

During a survey of freshwater diatoms from lakes in the region of Petuniabukta on Spitsbergen (Svalbard Archipelago) a new Gomphonema species, G. svalbardense sp. nov., has been recorded. The new taxon was previously cited in the literature as G. angustatum var. undulatum but this identification proved to be erroneous. Detailed morphology description of G. svalbardense based on light and scanning electron microscopy is presented in this paper and the morphological features of the taxon have been compared with similar species. Gomphonema svalbardense is characterized by its typical linear, almost naviculoid outline with undulating margins, with clearly inflated central part,  asymmetric central area, lateral raphe with simple straight proximal endings and the weakly radiate striae. History, ecology and biogeography of the species, mainly based on literature data, have been included.

An updated checklist of Turkish crabronid wasps (Hymenoptera: Crabronidae) with new and additional records

2021 ◽  
Vol 21 (2) ◽  
pp. 18-109
Author(s):  
EMIN KAPLAN ◽  
EROL YILDIRIM
Keyword(s):  
Key Words ◽  
New Records ◽  
First Time

An updated checklist of the wasp family Crabronidae in Turkey is provided. It is based on records present in the literature and on newly identified specimens collected in Turkey. In this study, 537 species and 16 subspecies in 65 genera are listed. Among them, five species, namely Dryudella esterinae Pagliano, 2001, Nysson mimulus Valkeila, 1964, Crossocerus pullulus A. Morawitz, 1866, Oxybelus spectabilis Gerstaecker, 1867 and Diodontus insidiosus Spooner, 1938 are recorded for the first time from Turkey. New and additional records for 114 species are given. Collection localities and photographs of newly identified species are provided. Key words: Hymenoptera, Crabronidae, checklist, new records, additional records, Turkey

scholarly journals Nervilia makinnoni Duthie. and Nervilia plicata (Andrews) Schltr. (Orchidaceae): new records for flora of Nepal

2010 ◽  
Vol 6 ◽  
pp. 109-110 ◽  
Author(s):  
Bhakta Bahadur Raskoti ◽  
Rita Ale
Keyword(s):  
Key Words ◽  
New Records ◽  
Conservation Status ◽  
Plant Science ◽  
Key Words Conservation

Nervilia makinnoni Duthie and Nervilia plicata (Andrews) Schltr. (Orchidaceae) are reported as new records to Nepal. Detail description, illustrations and relevant notes are provided. Key words: conservation status; herbarium; orchids; phenology.DOI: 10.3126/botor.v6i0.2920 Botanica Orientalis - Journal of Plant Science (2009) 6: 109-110

scholarly journals Two new records of Viola L. (Violaceae) for Nepal

1970 ◽  
Vol 2 (3) ◽  
pp. 48-50
Author(s):  
Ramesh S Dani ◽  
Krishna K Shrestha
Keyword(s):  
Key Words ◽  
New Records ◽  
Viola Odorata ◽  
The Family ◽  
First Time

Viola mandshurica W. Becker and Viola odorata L. belonging to the family Violaceae are reported for the first time from Nepal. The plants were collected along the trail between the suburbs Chovar and Jalbinayak, Kathmandu. Key words: Herbarium, Nepal, Viola Himalayan Journal of Sciences 2(3): 48-50, 2004

scholarly journals The structure and diversity of freshwater diatom assemblages from Franz Josef Land Archipelago: a northern outpost for freshwater diatoms

PeerJ ◽  
2016 ◽  
Vol 4 ◽  
pp. e1705 ◽  
Author(s):  
Sergi Pla-Rabés ◽  
Paul B. Hamilton ◽  
Enric Ballesteros ◽  
Maria Gavrilo ◽  
Alan M. Friedlander ◽  
...  
Keyword(s):  
Seasonal Changes ◽  
Ph Gradient ◽  
Diatom Assemblages ◽  
Diatom Flora ◽  
Human Footprint ◽  
Franz Josef Land ◽  
Freshwater Diatoms ◽  
Arctic Conditions ◽  
Cell Densities ◽  
Freshwater Diatom

We examined diatom assemblages from 18 stream and pond samples in the Franz Josef Land Archipelago (FJL), the most northern land of Eurasia. More than 216 taxa were observed, revealing a rich circumpolar diatom flora, including many undescribed taxa. Widely distributed taxa were the most abundant by cell densities, while circumpolar taxa were the most species rich. Stream and pond habitats hosted different assemblages, and varied along a pH gradient.Diatoma tenuiswas the most abundant and ubiquitous taxon. However, several circumpolar taxa such asChamaepinnularia gandrupii, Cymbella botellus, Psammothidiumsp. andHumidophila laevissimawere also found in relatively high abundances. Aerophilic taxa were an important component of FJL diatom assemblages (Humidophilaspp.,Caloneisspp. andPinnulariaspp.), reflecting the large and extreme seasonal changes in Arctic conditions. We predict a decrease in the abundance of circumpolar taxa, an increase in local (α-) freshwater diatom diversity, but a decrease in regional diversity (circumpolar homogenization) as a result of current warming trends and to a lesser extent the increasing human footprint in the region.

scholarly journals Diatoms from small ponds and terrestrial habitats in Deserta Grande Island (Madeira Archipelago)

2021 ◽  
Vol 9 ◽  
Author(s):  
Vítor Gonçalves ◽  
Catarina Ritter ◽  
Helena Marques ◽  
Dinarte Teixeira ◽  
Pedro Raposeiro
Keyword(s):  
New Records ◽  
Species Level ◽  
Biodiversity Assessment ◽  
Diatom Species ◽  
Madeira Archipelago ◽  
Natural Reserve ◽  
Freshwater Biota ◽  
Terrestrial Habitats

Freshwater diversity, and diatoms in particular, from Desertas Islands (Madeira Archipelago, Portugal) is poorly known, although the Islands are protected and became a Natural Reserve in 1995. During two field expeditions in 2013 and 2014 to Deserta Grande Island, several freshwater and terrestrial habitats were sampled. The analysis of these samples aims to contribute to the biodiversity assessment of the freshwater biota present in Deserta Grande Island. Here, we present the diatom diversity in Deserta Grande Island resulting from that survey. This study contributes to improve the knowledge of Madeira Archipelago freshwater diversity, particularly in the Desertas sub-archipelago. To our knowledge, we present the first diatom data for the Desertas sub-archipelago. This work resulted in a list of 60 diatom taxa for Deserta Grande, from which 57 were identified to species level. From the 60 new records for Desertas sub-archipelago, 30 of them were also new records for Madeira Archipelago. Several specimens could not be assigned to a known species and may be new diatom species not yet described.

scholarly journals New records and geographic distribution map of Pseudopaludicola pocoto (Anura: Leptodactylidae: Leiuperinae) in Northeastern Brazil

2017 ◽  
Vol 1 (2) ◽  
pp. 131 ◽  
Author(s):  
Charles De Sousa Silva ◽  
Igor Joventino Roberto ◽  
Robson Waldemar Ávila ◽  
Drausio Honorio Morais
Keyword(s):  
Key Words ◽  
Geographic Distribution ◽  
New Records ◽  
Rio Grande ◽  
Northeastern Brazil ◽  
Distribution Map ◽  
Caatinga Biome ◽  
Conservation Plans

<p>Fornecemos novos registros e um mapa de distribuição geográfica atualizado de Pseudopaludicola pocoto Magalhães, Loebmann, Kokubum, Haddad &amp; Garda, 2014 para os estados brasileiros do Ceará, Rio Grande do Norte e Pernambuco. O presente trabalho auxilia a preencher lacunas na distribuição desta espécie descrita para o domínio Caatinga, o que pode ser útil em futuros planos de conservação.</p><p><strong>Palavras chave</strong>: Amphibia, Caatinga, neotrópicos, Semi-árido.</p><p><strong>Abstract</strong>: We provide new records and an updated geographic distribution map of Pseudopaludicola pocoto Magalhães, Loebmann, Kokubum, Haddad &amp; Garda, 2014 for the Brazilian states of Ceará, Rio Grande do Norte and Pernambuco. The present work helps to fill gaps in distribution of this recently described species in Caatinga Biome, which can be useful in future conservation plans.<br />Key words: Amphibia, Caatinga, neotropics, Semiarid.</p>

New Records of the Diatom Species (Bacillariophyta) from the Seaweed and Tidal Flats in Korea

2017 ◽  
Vol 35 (4) ◽  
pp. 604-621
Author(s):  
Byoung Seok Kim ◽  
So Yeon Kim ◽  
Jong-Gyu Park ◽  
Andrzej Witkowski
Keyword(s):  
New Records ◽  
Tidal Flats ◽  
Diatom Species
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