SEM description of the first larval instar ofAchelia assimilis(Pycnogonida: Ammotheidae)

2011 ◽  
Vol 91 (5) ◽  
pp. 1081-1087 ◽  
Author(s):  
Tobias Lehmann ◽  
Christa Weinzierl ◽  
Roland R. Melzer
Keyword(s):  
Electron Microscope ◽  
Scanning Electron Microscope ◽  
Light Microscope ◽  
Larval Instar ◽  
Morphological Characters ◽  
Specific Level ◽  
Species Specific ◽  
First Time ◽  
Scanning Electron

The present paper is the first scanning electron microscope (SEM) description of a protonymphon larva of an Ammotheidae. The morphology of the first larval instar ofAchelia assimilisis described in detail and illustrated for the first time. The morphological characters are compared to previous larval descriptions of other pycnogonid species. The larvae are integrated into Bain's classification of larval types within the pycnogonids (Bain, 2003a) as a ‘typical protonymphon’. Larvae were obtained from ovigerous males, caught in Punta Huinay, Huinay, Chile and analysed with light microscope and SEM. Descriptions of pycnogonid protonymphons at a species-specific level in the future will contribute to a deeper understanding of larval pycnogonid taxonomy at the level of differential diagnoses.

scholarly journals Morphology and ecology of Thalassiosira Cleve (Bacillariophyta) species rarely recorded in Brazilian coastal waters

2009 ◽  
Vol 69 (4) ◽  
pp. 1059-1071 ◽  
Author(s):  
M. Garcia ◽  
C. Odebrecht
Keyword(s):  
Electron Microscope ◽  
Scanning Electron Microscope ◽  
Water Temperature ◽  
Wide Temperature Range ◽  
Coastal Waters ◽  
Light Microscope ◽  
Temperature Range ◽  
The World ◽  
First Time ◽  
Scanning Electron

The detailed description of rarely recorded Thalassiosira species in Brazil is presented with light microscope (LM) and scanning electron microscope (SEM) illustrations. A total of 78 phytoplankton net samples (20 µm) collected between the years 2000 and 2006 in coastal waters of southern Brazilian, Cassino Beach and the estuary of Lagoa dos Patos, were studied in cleaned material using the Axiovert Zeiss LM and Jeol 6060 SEM. Water temperature and salinity of samples and six species are presented: Thalassiosira endoseriata, T. hendeyi, T. lundiana, T. minuscula, T. oceanica and T. wongii. Two species, Thalassiosira hendeyi and T. endoseriata were the most common being observed in all seasons at Cassino Beach in a wide temperature range (10-26 ºC), while only sporadically in the estuary of Lagoa dos Patos. Thalassiosira endoseriata, T. lundiana, T. oceanica and T. wongii are for the first time reported in Brazilian coastal waters. The latter two species, rarely recorded in the world, are fully illustrated based on Brazilian material.

Taxonomic studies in the genus Haplanthodes (Acanthaceae)

Phytotaxa ◽  
2021 ◽  
Vol 516 (3) ◽  
Author(s):  
PRADIP VIKRAM DESHMUKH ◽  
SIDDHARTHAN SURVESWARAN ◽  
RAMCHANDRA DNYANOBA GORE ◽  
MANOJ MADHWANAND LEKHAK
Keyword(s):  
Electron Microscope ◽  
Scanning Electron Microscope ◽  
Light Microscope ◽  
Pollen Grains ◽  
Prolate Spheroidal ◽  
New Variety ◽  
Exine Ornamentation ◽  
Taxonomic Studies ◽  
First Time ◽  
Scanning Electron

The endemic Indian genus Haplanthodes (Acanthaceae) is revised. Four species, viz. H. neilgherryensis, H. plumosa, H. tentaculata and H. verticillata and a new variety, H. neilgherryensis var. toranganensis are recognized. Lectotype is designated for Haplanthodes, Haplanthus plumosus and H. verticillaris. The nomenclature of the Linnaean name Ruellia tentaculata is also discussed. Micromorphology of seed using light microscope (LM) and scanning electron microscope (SEM) is observed for the first time, and two types, reticulate and micro papillate, have been recognized based on surface sculpturing pattern. The genus differs from the related genera Andrographis and Haplanthus by distinctly two grooved seeds with hygroscopic hairs. Pollen grains of the genus are oblate or prolate spheroidal, distinctly triangular, trizonocolporate with reticulate exine ornamentation.

Key to the species of the genus Scleria (Cyperaceae) in Costa Rica based on the morphology of achenes

Phytotaxa ◽  
2016 ◽  
Vol 284 (2) ◽  
pp. 81
Author(s):  
PATRICIA ESPINOZA ◽  
EDUARDO CHACÓN-MADRIGAL ◽  
ETHEL SÁNCHEZ ◽  
JORGE GÓMEZ-LAURITO
Keyword(s):  
Cluster Analysis ◽  
Electron Microscope ◽  
Costa Rica ◽  
Scanning Electron Microscope ◽  
Light Microscope ◽  
Digital Images ◽  
Morphological Characters ◽  
Specific Variation ◽  
Scanning Electron

We described the achenes of 21 species of the genus Scleria reported in Costa Rica using 16 morphological characters and developed a key based only on achene characteristics. Specimens deposited in herbaria in Costa Rica were analyzed. We observed the achenes using a stereoscope and light microscope and took digital images that were used to measure the achenes. Besides, the achenes were observed using a Scanning Electron Microscope. A cluster analysis using achene characteristics was performed in order to know which species are morphologically similar. The intra-specific variation of the characteristics analyzed in the achenes studied is very small for all the species. Using characteristics of the achene, we could differentiate species among four of the five traditional sections of the genus used to classify the species: Hypoporum, Ophryoscleria, Schizolepis and Scleria. The key allows differentiating among 21 species of the genus Scleria previously reported in Costa Rica using only achenes. Besides the key, we prepared an illustrative guide for the genus using pictures taken with SEM and a stereoscope. The descriptions offer better information about the species that grow in Costa Rica.

Spore morphology of Selaginella (Selaginellaceae) from China and its systematic significance

Phytotaxa ◽  
2015 ◽  
Vol 237 (1) ◽  
pp. 1 ◽  
Author(s):  
Xin-Mao Zhou ◽  
Li-Jü Jiang ◽  
Liang Zhang ◽  
Xin-Fen Gao ◽  
Zhao-Rong He ◽  
...  
Keyword(s):  
Electron Microscope ◽  
Scanning Electron Microscope ◽  
Light Microscope ◽  
Morphological Characteristics ◽  
Spore Morphology ◽  
Systematic Significance ◽  
First Time ◽  
Scanning Electron

Using light microscope (LM) and scanning electron microscope (SEM), the megaspores and microspores of 77 samples representing ca. 70 species of Selaginella from China are observed. Combing previous studies, the spore morphology of nearly all documented Selaginella species from China were reviewed. Based on the morphological characteristics in megaspores and/or microspores, we divided the spores of Chinese species into 15 types and three types are further divided into various subtypes. Each type and subtype are described in detail and a key to the types and subtypes of spores is given. For the first time, the systematic significance of microspores of Selaginella are discussed, and the results indicate that microspores of Selaginella are significant in the systematics of Selaginella. Some important morphological characteristics in spores (e.g., color, micro-sculpture, size, etc.), often been neglected in previous studies, are introduced. Some spore-morphological synapomorphies of the clades and subclades, identified by recent molecular work (Zhou et al. 2015a), are well established. Using the spore morphology, the delimitation of some taxonomically difficult species in Selaginella is assessed.

Larvae of Amphipsyche species (Trichoptera: Hydropsychidae) from Thailand

Zootaxa ◽  
2013 ◽  
Vol 3635 (3) ◽  
pp. 251-260
Author(s):  
PRONTHIP PEUMWARUNYOO ◽  
TAENG-ON PROMMI
Keyword(s):  
Electron Microscope ◽  
Scanning Electron Microscope ◽  
Larval Instar ◽  
Morphological Characters ◽  
Microscope Images ◽  
Scanning Electron

Morphological characters and scanning electron microscope images of the larvae of Amphipsyche meridiana and A. gratiosa are given. Pupal identifications are based on genitalic features in common with described adults, and larvae were associated with the pupae based on residual larval sclerites captured in the pupal case. Herein, the final larval instar is described, diagnosed, and photographed for each species.

SEM and stereoscope microscope observations on the seeds of some Ornithogalum (Hyacinthaceae) species

Biologia ◽  
2008 ◽  
Vol 63 (5) ◽  
Author(s):  
Leszek Bednorz ◽  
Aneta Czarna
Keyword(s):  
Electron Microscope ◽  
Scanning Electron Microscope ◽  
Morphological Characters ◽  
Seed Morphology ◽  
Similar Species ◽  
Specific Level ◽  
Seed Surface ◽  
Taxonomic Criterion ◽  
Micromorphological Characters ◽  
Scanning Electron

AbstractThe paper presents the results of the study on seed morphology of four following Ornithogalum species: O. boucheanum Asch., O. nutans L., O. pyrenaicum L., and O. umbellatum L. Several macro-and micro-morphological characters were observed using stereoscope and scanning electron microscope. Differences were found especially in micromorphological characters of the seed surface, the shape of raphe and micropylar pole. These characters can be used as an additional taxonomic criterion at specific level for this genus. Only the seeds of O. boucheanum and O. nutans — two closely related and morphologically very similar species are practically undistinguished.

A palynological survey of the genus Iberis (Brassicaceae), known as candytufts, in Turkey

Phytotaxa ◽  
2019 ◽  
Vol 397 (3) ◽  
pp. 213 ◽  
Author(s):  
BURCU YILMAZ ÇITAK
Keyword(s):  
Electron Microscope ◽  
Scanning Electron Microscope ◽  
Light Microscope ◽  
Pollen Grains ◽  
Polar View ◽  
Prolate Spheroidal ◽  
Exine Ornamentation ◽  
First Time ◽  
Scanning Electron

The present study reports for the first time detailed palynological traits of the Turkish species Iberis. Both light microscope (LM) and scanning electron microscope (SEM) were used for the characterisation of the species. Radially symmetrical, isopolar, and tricolpate pollen grains were observed as common characters in all of the examined taxa. The pollen grains were prolate-spheroidal with polar axes ranging from 21.97 to 29.25 µm and equatorial axes ranging from 20.34 to 26.09 µm. Their polar shapes were subcircular to subtriangular. Two types of exine ornamentation were observed using a SEM. A numerical UPGMA analysis showed that the dimensions of polar axes, equatorial axes and outline in polar view (amb) were the most valuable variables for separating the Iberis species.

The occurrence and morphology of Caudospora spp. (Protozoa: Microsporida) in Newfoundland and Labrador blackfly larvae (Diptera: Simuliidae)

1972 ◽  
Vol 50 (11) ◽  
pp. 1363-1366 ◽  
Author(s):  
Stanley Frost ◽  
Richard A. Nolan
Keyword(s):  
Electron Microscope ◽  
Scanning Electron Microscope ◽  
Newfoundland And Labrador ◽  
Light Microscope ◽  
Spore Form ◽  
Blackfly Larvae ◽  
First Time ◽  
Scanning Electron ◽  
Sem Studies

Caudospora simulii is widespread in the Province of Newfoundland and Labrador and occurs in two species of Prosimulium. Caudospora brevicauda is recorded from the Island of Newfoundland and from Canada for the first time. The occurrence of a new spore form from Cnephia mutata is recorded from Labrador. Scanning electron microscope (SEM) studies were carried out with all three spore forms. The usefulness of SEM observations as a supplement to light microscope studies with microsporida is discussed.

scholarly journals A new species of Trichomyia (Diptera: Psychodidae: Trichomyiinae) and report of antennal sensilla in adult

2018 ◽  
Vol 58 ◽  
pp. e20185837
Author(s):  
Maíra Xavier Araújo ◽  
Freddy Bravo
Keyword(s):  
Electron Microscope ◽  
New Species ◽  
Scanning Electron Microscope ◽  
Light Microscope ◽  
The State ◽  
Antennal Sensilla ◽  
First Time ◽  
A New Species ◽  
Scanning Electron

This paper describes and illustrates Trichomyia muiraquita Araújo & Bravo sp. nov. from the state of Amazonas, Brazil. Furthermore, with the aid of a scanning electron microscope and light microscope, we report for the first time the presence of two small sensilla in flagellomeres of the Trichomyia species.

scholarly journals Taxonomic review of chinas (Lathyrus L.) species in the flora of Azerbaijan

2020 ◽  
pp. 47-56
Author(s):  
G. F. Allahverdieva ◽  
A. M. Askerov
Keyword(s):  
Electron Microscope ◽  
Literature Review ◽  
Scanning Electron Microscope ◽  
Morphological Characters ◽  
The South ◽  
South Caucasus ◽  
Taxonomic Review ◽  
The Status ◽  
First Time ◽  
Scanning Electron

As a result of the expedition, herbarium and literature review, the article presents a new conspectus of the genus Lathyrus L. s. l. of the South Caucasus (Azerbaijan Republic). The study revealed a new area of two species (L. hirsutus L., L. inconspicuus L.) and clarified the status of one species (L. leptophyllus Bieb.). For the first time, micromorphology structure of seeds in some species (L. annuus, L. cicera, L. hirsutus, L. tuberosus, L. miniatus, L. pratensis, L. laxiflorus, L. aphaca, L. nissolia, L. sphaericus) were included by scanning electron microscope. Morphological characters of the sections were analysed according to Kupicha with some additions. Our work showed that Lathyrus seeds are circular, pressed-angular, elliptical, coloured in brown tones, with tuberculate, smooth, reticulate-rugulose surface. In the article, in contrast to the classification according to "Flora of Azerbaijan", species belonging to the genus Orobus are included in the genus Lathyrus.

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