scholarly journals Taxonomy and distribution of Pectinariidae (Annelida) from Iceland with a comparative analysis of uncinal morphology

2020 ◽  
Author(s):  
Julio Parapar ◽  
Verónica Palomanes ◽  
Gudmundur V. Helgason ◽  
Juan Moreira
Keyword(s):  
Electron Microscope ◽  
Comparative Analysis ◽  
Scanning Electron Microscope ◽  
Southern Coast ◽  
Bathymetric Distribution ◽  
The Family ◽  
Stereo Microscope ◽  
Northeast Coast ◽  
Scanning Electron

Based on samples collected during the BIOICE project off Iceland, four species of marine annelids belonging to the family Pectinariidae were identified: Amphictene auricoma (O.F. Müller, 1776), Cistenides granulata (Linnaeus, 1767), Cistenides hyperborea Malmgren, 1865 and Lagis koreni Malmgren, 1866. Taxonomic remarks and data on geographical and bathymetric distribution are presented. The distribution of each species off Iceland was evaluated and two patterns were defined: C. granulata and C. hyperborea were mainly found in waters off the northeast coast, while A. auricoma and L. koreni were found on the southern coast. Several body characters with taxonomic value in this family were reviewed under the stereo microscope and scanning electron microscope, with special emphasis on the neuropodial uncini. Remarks on these special chaetae are included in the diagnoses.

scholarly journals Taxonomic significance of spermoderm pattern in Cucurbitaceae

2013 ◽  
Vol 20 (1) ◽  
pp. 61-65
Author(s):  
M. Ajmal Ali ◽  
Fahad M.A. Al-Hemaid ◽  
Arun K. Pandey ◽  
Joongku Lee
Keyword(s):  
Electron Microscope ◽  
Scanning Electron Microscope ◽  
Cucumis Melo ◽  
Taxonomic Significance ◽  
Citrullus Colocynthis ◽  
Benincasa Hispida ◽  
The Family ◽  
Plant Taxon ◽  
Relationship Of ◽  
Scanning Electron

Studies on spermoderm using scanning electron microscope (SEM) were undertaken in 12 taxa under 11 genera of the family Cucurbitaceae sampled from India, China and Korea. The spermoderm pattern in the studied taxa varies from rugulate, reticulate to colliculate type. The spermoderm shows rugulate type in Benincasa hispida and Sicyos angulatus; reticulate type in Citrullus colocynthis, Cucumis melo var. agrestis, Diplocyclos palmatus, Hemsleya longivillosa, Luffa echinata, Momordica charantia, M. cymbalaria, Schizopepon bryoniifolius, and Trichosanthes cucumerina; and colliculate type  in Gynostemma laxiflorum. The present study clearly reveals that the testa features greatly varies across the genera which can be used as micromorphological markers for identification as well as character states for deducing relationship of the taxa within the family.DOI: http://dx.doi.org/10.3329/bjpt.v20i1.15465Bangladesh J. Plant Taxon. 20(1): 61-65, 2013 (June)

scholarly journals Polyphyly and homoplasic structures in rhizosolenioid diatom genera: a review

2019 ◽  
Vol 152 (2) ◽  
pp. 142-149
Author(s):  
Richard W. Jordan ◽  
Matt P. Ashworth ◽  
Yuki Uezato ◽  
Schonna R. Manning
Keyword(s):  
Electron Microscope ◽  
Literature Review ◽  
Scanning Electron Microscope ◽  
Strong Support ◽  
Molecular Data ◽  
Literature Survey ◽  
Single Family ◽  
The Family ◽  
Family Level ◽  
Scanning Electron

Background and aims – Traditionally, extant rhizosolenioid diatom genera have been placed in a single family, the Rhizosoleniaceae. However, preliminary molecular data suggested that the family might be polyphyletic. Therefore, a literature review of the morphological, ultrastructural and molecular data of the rhizosolenioid genera was undertaken. Methods – In addition to the literature survey, the location of the rimoportula in a number of rhizosolenioid genera was investigated by breaking the valves and observing the fragments in the scanning electron microscope. Key results – The data provides strong support for the previous separation of Proboscia and Rhizosolenia at the family level (Probosciaceae vs. Rhizosoleniaceae), with the rimoportula being located at the tip of the proboscis in Proboscia, or with an internal labia at the base of the hollow tubular rimoportula (= spine or process) in Rhizosolenia and Pseudosolenia. Conclusions – The data suggests that a number of rhizosolenioid genera should be transferred to other families, and that gene sequences of two genera (Dactyliosolen and Neocalyptrella) are needed as their morphological features differ markedly from those of the Rhizosoleniceae s. str. (Rhizosolenia, Guinardia, Pseudosolenia).

Meschia zoui sp. nov., first representative of the family Meschiidae from China (Hemiptera: Heteroptera: Lygaeoidea)

Zootaxa ◽  
2019 ◽  
Vol 4603 (1) ◽  
pp. 172
Author(s):  
CUIQING GAO ◽  
M. B. MALIPATIL
Keyword(s):  
Electron Microscope ◽  
New Species ◽  
Scanning Electron Microscope ◽  
Southern China ◽  
The Family ◽  
Cuticular Structures ◽  
A New Species ◽  
Scanning Electron

All the species of the family Meschiidae, known until now only from India and Australia, are reviewed. A new species, Meschia zoui sp. nov. from southern China, is described as the first representative of this family from China, also its cuticular structures are studied using the scanning electron microscope. A key to all species of Meschiidae is provided, along with a re-description of Meschia quadrimaculata Distant.

Glugea hertwigi. [Descriptions of Fungi and Bacteria].

2019 ◽  
Author(s):  
D. W. Minter
Keyword(s):  
Electron Microscope ◽  
North America ◽  
Scanning Electron Microscope ◽  
Freshwater Fish ◽  
Rough Surface ◽  
Geographical Distribution ◽  
Fish Parasite ◽  
Brackish Waters ◽  
The Family ◽  
Scanning Electron

Abstract This article describes the morphology, morphometrics, and geographical distribution of the freshwater fish parasite Glugea hertwigi infecting fish of the family Osmeridae (smelts) in freshwater of north temperate to boreal Europe and North America and nearby seas and brackish waters. Using a scanning electron microscope, spores of this species have a rough surface with loose folds and longitudinal wrinkles. This distinguishes them from spores of G. anomala. This parasite can be found in Canada, USA, Finland, Germany, and Russia.

scholarly journals Achnanthes citronella, A. trachyderma comb. nov. (Bacillariophyta) and allied taxa pertaining to the same morphological group

Phytotaxa ◽  
2015 ◽  
Vol 227 (2) ◽  
pp. 101 ◽  
Author(s):  
Catherine Riaux-gobin ◽  
Pierre Compère ◽  
Friedel Hinz ◽  
Luc Ector
Keyword(s):  
Electron Microscope ◽  
Scanning Electron Microscope ◽  
Light Microscope ◽  
Smithsonian Institution ◽  
Original Description ◽  
Marine Environments ◽  
Morphological Group ◽  
The Family ◽  
History Of ◽  
Scanning Electron

Several diatoms in the family Achnanthaceae (Bacillariophyta), mainly from marine environments, have species with strongly apiculate, lemon-shaped valves. Some of them originally described under the genus Cocconeis (i.e., C. trachyderma or C. citronella), while others were first described as Stauroneis species [i.e. Stauroneis apiculata or S.(?) obesa]. Afterwards, Cocconeis citronella has been recombined within Achnanthes by Hustedt. The type material of C. citronella from Albert Mann’s collection, housed in the Smithsonian Institution (US), has been examined with light microscope; some ambiguities are pointed out and new details added to the original description. The intricate history of the latter taxon is redrawn and comparison with allied taxa are tentatively addressed. Cocconeis trachyderma is lectotypified and recombined as Achnanthes trachyderma comb. nov. Stauroneis apiculata and S.(?) obesa are recombined as Achnanthes apiculata comb. nov. and Achnanthes obesa comb. nov. respectively. The examination with light and scanning electron microscope of several marine samples from the Society Archipelago details the unique morphology of Achnanthes trachyderma which, until recently, has been often misidentified as Achnanthes citronella due to certain similarities between both taxa.

scholarly journals Karakteristik morfologi teritip spons Indonesia

DEPIK ◽  
2014 ◽  
Vol 3 (2) ◽  
Author(s):  
Sulistiono . ◽  
Mujizat Kawaroe ◽  
Hawis Madduppa ◽  
Romanus Edy Prabowo
Keyword(s):  
Electron Microscope ◽  
Coral Reef ◽  
Scanning Electron Microscope ◽  
Species Identification ◽  
Host Species ◽  
Morphological Characteristics ◽  
Morphological Description ◽  
Sampling Locations ◽  
Stereo Microscope ◽  
Scanning Electron

Abstract. Research on the sponge barnacle of Indonesia is very rare, and this study is aimed to describe the morphological characteristics of sponge barnacles and their specific relationship with their sponge host species. This research was a survey and sponge samples were collected by tearing apart any available sponge found in three sampling locations, typically coral reef areas of Weh Island, Seribu Islands, and Karimunjawa Islands. Sponge barnacles contained in sponge samples were observed using stereo microscope and scanning electron microscope, and species identification was determined based on the morphological description of Darwin (1854), Pilsbry (1916), Martin dan Davis (2001), and Kolbasov (1993). Four species of sponge barnacles were found consisting of Acasta cyathus, Acasta fenestrata, Euacasta dofleini, and Membranobalanus longirostrum. Specific relationships of barnacle and its sponge host were found between Euacasta dofleini and Haliclona sp. and between Membranobalanus longirostrum and Suberites sp. respectively. Keywords : sponge; barnacle; acasta; membranobalanus; biodiversityAbstrak. Penelitian teritip spons Indonesia jarang dilakukan sejak kelompok ini pertama kali dideskripsikan hingga saat ini. Tujuan dari penelitian ini adalah untuk mengkaji karakter morfologi teritip spons Indonesia dan untuk mengkaji hubungan spesies spesifik teritip terhadap spons. Pengambilan sampel pada penelitian ini dilaksanakan sejak Oktober sampai Desember 2012 di tiga lokasi yaitu Pulau Weh, Kepulauan Seribu, dan Kepulauan Karimunjawa. Metode penelitian menggunakan metode survei dan titik pengambilan sampel dipilih berdasarkan keberadaan spons. Sampel diamati menggunakan mikroskop stereo dan mikroskop elektron kemudian diidentifikasi berdasarkan deskripsi Darwin (1854), Pilsbry (1916), Martin dan Davis (2001), dan Kolbasov (1993). Hasil penelitian didapatkan empat spesies teritip spons yaitu Acasta cyathus, A. fenestrata, Euacasta dofleini, dan Membranobalanus longirostrum. Terdapat hubungan spesies spesifik antara teritip dan spons inang yaitu antara teritip E. dofleini dan spons Haliclona sp. dan antara teritip M. longirostrum dan spons Suberites sp. Kata kunci : teritip; spons; acasta; membranobalanus; biodiversitas

Scanning electron microscope study of brochosomes of cercopidae

1994 ◽  
Vol 52 ◽  
pp. 358-359
Author(s):  
A. S. Frost ◽  
J. S. Gardner ◽  
M. Nielson
Keyword(s):  
Electron Microscopy ◽  
Scanning Electron Microscopy ◽  
Electron Microscope ◽  
Scanning Electron Microscope ◽  
Microscope Study ◽  
Electron Microscope Study ◽  
Scanning Electron Microscope Study ◽  
The Family ◽  
Scanning Electron

Brochosomes are minute granules secreted by specialized cells lining the lumen of Malphigian tubules in homopteran insects. They have been reported on two different homopteran families, the Cicadellidae (leaf-hoppers) and Membracidae (tree-hoppers), but they have never been reported on members of the family Cercopidae (froghoppers), although they have been suspected to be produced by other homopteran families. These three families all belong to the subgroup Auchenorryncha, and often coexist in the same habitat. Many theories have been proposed regarding brochosome function, but no conclusive results have ever been reported.Scanning electron microscopy was used to study legs of five species of Cercopidae. Brochosomes were observed on legs of Lepyronid batrachoidea (Fig. 1), Clastoptera brunnea (Fig. 2), Philaronia bilineata (Fig. 3), and Aphozphoza media (Fig. 4). None was found on Clastoptera juniperina. The shape of the brochosomes remained fairly consistent on all species except Clastoptera brunnea. Normally the structure was a polyhedron consisting of 12 pentagons and 20 hexagons, appearing hollow and nearly spherical. However, on Clastoptera brunnea, the brochosomes were larger and appeared to be more faceted.

scholarly journals A comparative study of achene morphology in Korean Polygonaceae

2018 ◽  
Vol 25 (2) ◽  
pp. 135-148
Author(s):  
Min-Jung Kong ◽  
Jun-Ho Song ◽  
Beom-Cheol An ◽  
Sung-Won Son ◽  
Gang-Uk Suh ◽  
...  
Keyword(s):  
Electron Microscope ◽  
Scanning Electron Microscope ◽  
Morphological Characteristics ◽  
Species Level ◽  
Taxonomic Significance ◽  
Stereo Microscope ◽  
Surface Patterns ◽  
Fagopyrum Esculentum Moench ◽  
Rumex Maritimus ◽  
Scanning Electron

A comparative macro- and micromorphological study was conducted on achenes of Korean Polygonaceae comprising 45 taxa under 10 genera using a Stereo-microscope (SM) and Scanning Electron Microscope (SEM) to evaluate the taxonomical relevance of achene morphological characteristics. The achene shape is lenticular, biconvex, trigonous, or spheroidal. The largest achenes are found in Fagopyrum esculentum Moench (5.80–6.70 × 3.90–4.40 mm) and Rheum rhabarbarum L. (5.00–6.50 × 4.00–5.20 mm), and the smallest is found in Rumex maritimus L. (1.17–1.41 × 0.60–0.84 mm). Three types of embryo shape (curved, straight, and folded) and two types of embryo position (plane and parietal) can be distinguished. Most taxa have a curved embryo shape with plane position. Four types of surface patterns (smooth, papillae, tuberculate, or small pits) are observed. The surface sculpture or embryo type is rather consistent at the generic or tribal level, and the comprehensive consideration of achene characteristics is also useful at the species level. The achene morphology is described in detail, compared, and illustrated. The taxonomic significance of the achene morphology is discussed.

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