scholarly journals First record of Porocephalus cf. clavatus (Pentastomida: Porocephalida) as a parasite on Bothrops asper (Squamata: Viperidae) in Costa Rica

2015 ◽  
Vol 75 (4) ◽  
pp. 854-858 ◽  
Author(s):  
G. Alvarado ◽  
A. Sánchez-Monge
Keyword(s):  
Electron Microscopy ◽  
Scanning Electron Microscopy ◽  
Costa Rica ◽  
First Record ◽  
Taxonomic Position ◽  
Caribbean Region ◽  
Bothrops Asper ◽  
The Caribbean ◽  
Scanning Electron

Abstract Pentastomids are parasites that infect respiratory cavities of vertebrates, they are pretty common but poorly known in wildlife veterinary. A Bothrops asper snake (Garman, 1884) was captured in the Caribbean region of Costa Rica and had its lung infested with pentastomids, identified as ca Porocephalus clavatus (Wyman, 1845). This represents the first record of Porocephalus (Humboldt, 1812) on B. asper as well as P. cf. clavatus in Costa Rica. Further studies are needed to clarify their taxonomic position, images and scanning electron microscopy photographs (SEM) of the specimens are given.

Investigation of taxonomically important morphological features of endoparasitic bat flies of the subfamily Ascodipterinae (Diptera: Streblidae) by scanning electron microscopy

Zootaxa ◽  
2006 ◽  
Vol 1122 (1) ◽  
pp. 57 ◽  
Author(s):  
MICHAEL W. HASTRITER ◽  
KATHARINA DITTMAR ◽  
MICHAEL F. WHITING
Keyword(s):  
Electron Microscopy ◽  
Scanning Electron Microscopy ◽  
Light Microscopy ◽  
Morphological Features ◽  
Taxonomic Position ◽  
Old World ◽  
Bat Flies ◽  
Molecular Information ◽  
Scanning Electron

Endoparasitic dealate females of Ascodipteron and an undescribed genus of Ascodipterinae are examined by scanning electron microscopy. The unique morphology of the head and mouth parts and terminal segments are displayed and discussed. Prior reports have focused only on details observable with light microscopy. The taxonomic position of members of the subfamily Ascodipterinae relative to the Old World families of Streblidae and Nycteribiidae is briefly discussed in light of previously published molecular information.

Revised taxonomy and redescription of two species of the Peripatidae (Onychophora) from Brazil: a step towards consistent terminology of morphological characters

Zootaxa ◽  
2010 ◽  
Vol 2493 (1) ◽  
pp. 16 ◽  
Author(s):  
IVO DE SENA OLIVEIRA ◽  
ALFREDO HANNEMANN WIELOCH ◽  
GEORG MAYER
Keyword(s):  
Electron Microscopy ◽  
Scanning Electron Microscopy ◽  
Type Species ◽  
Morphological Characters ◽  
Type Material ◽  
Taxon Sampling ◽  
The Caribbean ◽  
Dermal Papillae ◽  
Scanning Electron

Based on the supposed quadrangular shape of the basal pieces of dorsal primary papillae, several species of the “Caribbean group” of the neotropical Peripatidae, including Macroperipatus acacioi and M. machadoi, were assigned to Macroperipatus. So far, the quadrangular shape of dermal papillae was confirmed only for M. torquatus, the type species of the genus. Previous observations revealed that the putatively quadrangular shape reported from other species of the “Caribbean group” might be a fixation artefact. Hence, detailed reinvestigations of all putative Macroperipatus species are required to clarify their taxonomy. In the present study, two species of the “Caribbean group”, M. acacioi and M. machadoi, are analyzed and redescribed, based on type material and topotype specimens collected at the corresponding type localities. The original descriptions of both species are complemented with data obtained from scanning electron microscopy, in addition to conventional morphological methods. The quadrangular bases of primary papillae are shown to be absent from M. acacioi and M. machadoi, thus suggesting that these two species are not closely related to M. torquatus. The new data instead suggest that these two species are representatives of Epiperipatus: E. acacioi comb. nov. and E. machadoi comb. nov.. The present study highlights the use of scanning electron microscopy for clarifying the taxonomy and phylogeny of the neotropical Peripatidae. It also reveals gaps in taxon sampling and problems regarding the ambiguous terminology of morphological characters used for describing the anatomy of peripatids. An attempt is made towards a consistent terminology for species (re)descriptions and studies of onychophoran anatomy and phylogeny.

Observations on North American Gomphoneis. III. Gomphoneis septa comb.nov.

1986 ◽  
Vol 64 (11) ◽  
pp. 2764-2768 ◽  
Author(s):  
J. P. Kociolek ◽  
E. F. Stoermer ◽  
L. L. Bahls
Keyword(s):  
Electron Microscopy ◽  
Scanning Electron Microscopy ◽  
North American ◽  
Size Range ◽  
Taxonomic Position ◽  
Apical Pore ◽  
Close Relationship ◽  
Ultrastructural Characteristics ◽  
Scanning Electron

The valvar ultrastructure of the diatom Gomphonema septum Mogh. was investigated with scanning electron microscopy and is discussed with regard to the taxonomic position of this species. Ultrastructural features include striae composed of double rows of puncta, presence of a narrow axial plate which is responsible for the image of longitudinal lines, and apical pore fields composed of pores dissimilar in appearance from the puncta. These and other ultrastructural characteristics point to a close relationship between G. septum and members of the genus Gomphoneis. A transfer of Gomphonema septum to Gomphoneis is proposed. Information supplemental to previous observations on the size range and variability of this species is presented.

scholarly journals Use of different SEM techniques in the study of Tyrophagus putrescentiae (Acari: Acaridae) in Costa Rica

2013 ◽  
Vol 5 (2) ◽  
pp. 201-208
Author(s):  
Pamela Murillo ◽  
Hugo Aguilar ◽  
Ethel Sanchez
Keyword(s):  
Electron Microscopy ◽  
Scanning Electron Microscopy ◽  
Costa Rica ◽  
Morphological Characters ◽  
Morphological Description ◽  
Tyrophagus Putrescentiae ◽  
Viable Option ◽  
Efficient Procedure ◽  
Advantages And Disadvantages ◽  
Scanning Electron

Scanning electron microscopy (SEM) has been used as a tool to facilitate the morphological description of mites and to complement the information obtained from the light microscope. Unfortunately, several of SEM techniques used for soft-bodied mites such as Tyrophagus, have in many cases not shown the desired results. This investigation sought to develop an efficient procedure for preparing specimens of T. putrescentiae for SEM so that its major morphological characters could be observed and photographed. This species is the most important contaminant of tissue culture laboratories in Costa Rica. Seven methods were used to process the samples. The evaluated treatments showed differences in their ability to preserve the morphological structures of the specimens. The advantages and disadvantages of each treatment are discussed.  Mites processed using ethanol were the most viable option with method 3 being the procedure that showed the best results; this technique also reduced the time and costs of processing the specimens.KEY WORDSAcari, Acaridae, Tyrophagus putrescentiae, Scanning Electron Microscopy (SEM), SEM techniques

Redescription of the species Procloeon (Pseudocentroptilum) fascicaudale (Sowa, 1985) (Ephemeroptera: Baetidae) with notes to its taxonomic position, biology and distribution

Zootaxa ◽  
2018 ◽  
Vol 2490 (1) ◽  
pp. 16 ◽  
Author(s):  
PAVEL SROKA ◽  
ROMAN J. GODUNKO ◽  
TOMÁŠ SOLDÁN
Keyword(s):  
Electron Microscopy ◽  
Scanning Electron Microscopy ◽  
Life Cycle ◽  
Species Group ◽  
Taxonomic Position ◽  
Time Variability ◽  
Color Patterns ◽  
Distributional Patterns ◽  
First Time ◽  
Scanning Electron

Based on the extensive material recently collected on the Island of Rhodos, Greece (terra typica) in May, 2005, a redescription of Procloeon (Pseudocentroptilum) fascicaudale (Sowa, 1985) is presented. Larval characters are completed, female subimago described and the egg chorionic structures illustrated by means of scanning electron microscopy for the first time. Variability in color patterns and critical characters distinguishing eggs, larvae and male imagines from other Westpalaearctic species of the subgenus Pseudocentroptilum Bogoescu, 1947 (the representatives of the Procloeon (Pseudocentroptilum) motasi species-group in particular) are described and discussed. Distributional patterns of the species, its abundance, possible faunistic origin, some aspects of larval and imago’s biology, and life cycle of the species are briefly stated. Delimitation and recent concepts of the taxa Procloeon Bengtsson, 1915 and Pseudocentroptilum within the subfamily Cloeoninae Kazlauskas, 1972, taxonomic position and affinities of P. fascicaudale are discussed.

scholarly journals Anisakid larva parasitizing Plagioscion squamosissimus in Marajó Bay and Tapajós River, state of Pará, Brazil

2016 ◽  
Vol 25 (4) ◽  
pp. 492-496 ◽  
Author(s):  
Gabrielle Fontenelle ◽  
Marcelo Knoff ◽  
Nilza Nunes Felizardo ◽  
Eduardo José Lopes Torres ◽  
Edilson Rodrigues Matos ◽  
...  
Keyword(s):  
Electron Microscopy ◽  
Scanning Electron Microscopy ◽  
Optical Microscopy ◽  
Infection Intensity ◽  
First Record ◽  
South American ◽  
Taxonomic Identification ◽  
Infection Site ◽  
Anisakid Nematodes ◽  
Scanning Electron

Abstract In November 2014 and May 2015, a total of 44 specimens of the South American silver croaker Plagioscion squamosissimus were collected: 30 in Marajó Bay and 14 in the Tapajós River, state of Pará, Brazil. The aim was to investigate the presence of anisakid nematodes and determine their parasitism indices and sites of infection, because of their importance regarding health inspection. Sixty-nine Anisakis sp. larvae were found; among them, 16 larvae in seven fish collected in Marajó Bay and 53 larvae in four fish in the Tapajós River. The parasitism indices of the nematodes collected from the fish in Marajó Bay comprised prevalence (P) of 23%, mean infection intensity (MI) of 2.28, mean abundance (MA) of 0.53, range of infection (RI) of 1-4, and infection site (IS) in the mesentery. The fish from the Tapajós River showed P = 28%, MI = 13.2, MA = 3.8, RI = 1-22, and IS = mesentery and intestine. To assist in taxonomic identification, images of the specimens obtained through optical microscopy with Nomarski's interferential contrast system and scanning electron microscopy were used. This is the first record of Anisakis sp. parasitizing P. squamosissimus.

scholarly journals Contracaecumovale (Nematoda: Anisakidae) from Rollandia rolland Quoy & Gaimard 1824 (Aves, Podicipedidae) in Argentina

2012 ◽  
Vol 21 (2) ◽  
pp. 143-147 ◽  
Author(s):  
Noelia Adelina Galeano ◽  
Ruben Daniel Tanzola
Keyword(s):  
Electron Microscopy ◽  
Scanning Electron Microscopy ◽  
Morphological Study ◽  
Buenos Aires ◽  
First Record ◽  
Buenos Aires Province ◽  
Marked Specificity ◽  
Scanning Electron

Necropsy on 15 specimens of white-tufted grebe, Rollandiarolland, caught in the Mar Chiquita and Chascomús lagoons (Buenos Aires province), revealed the presence of Contracaecumovale (Linstow, 1907). This nematode shows a marked specificity for podicipediform birds. The specimens were identified from morphological study on features such as cephalic and esophageal structures and caudal papillae, using both optical and scanning electron microscopy. This is the first record of C. ovale parasitizing R. rolland in Argentina.

Natural infection of Oryctolagus cuniculus (Lagomorpha, Leporidae) by Gongylonema neoplasticum (Nematoda, Gongylonematidae) in Portugal

2006 ◽  
Vol 51 (2) ◽  
Author(s):  
Catarina Eira ◽  
Jordi Miquel ◽  
José Vingada ◽  
Jordi Torres
Keyword(s):  
Electron Microscopy ◽  
Scanning Electron Microscopy ◽  
Geographical Distribution ◽  
Oryctolagus Cuniculus ◽  
Natural Infection ◽  
First Record ◽  
Surface Features ◽  
Biological Features ◽  
Host Spectrum ◽  
Scanning Electron

AbstractGongylonema neoplasticum was identified in the oesophagus of 14 wild rabbits (Oryctolagus cuniculus) from Portugal. This is the first record of Gongylonema neoplasticum in a naturally infected lagomorph species in Europe. This paper presents the most relevant measurements of adult worms and some of their surface features seen by scanning electron microscopy. Epidemiological aspects of G. neoplasticum such as geographical distribution, host spectrum and biological features are discussed.

scholarly journals Primeros registros e intervalos de distribución de Holothuria (Theelothuria) princeps Selenka, 1867 (Echinodermata: Holothuroidea: Holothuriidae) en el golfo de Morrosquillo, Caribe Colombiano

2019 ◽  
Vol 54 (1) ◽  
pp. 139
Author(s):  
Carlos Carlos Nisperuza-Pérez ◽  
Jorge Quirós-Rodríguez ◽  
Francisco Alonso Solís-Marín
Keyword(s):  
Electron Microscopy ◽  
Scanning Electron Microscopy ◽  
Spatial Distribution ◽  
Geographic Distribution ◽  
Morphological Description ◽  
Caribbean Coast ◽  
The Caribbean ◽  
Microscopy Images ◽  
Scanning Electron

The geographic distribution of Holothuria (Theelothuria) princeps in Colombian Caribbean is extended inside the Gulf of Morrosquillo, based on 7 individuals collected in Banco de Arena sector, Córdoba. A morphological description of this species record with color figures and scanning electron microscopy images of their ossicles is provided. This finding increases the spatial distribution of this species in the Caribbean coast of Colombia.

Chorion exploration in the tribe Anthocharidini (Lepidoptera: Pieridae) and their possible importance in its systematics

Zootaxa ◽  
2020 ◽  
Vol 4868 (2) ◽  
pp. 151-207
Author(s):  
SANDRA NIEVES-URIBE ◽  
ADRIÁN FLORES-GALLARDO ◽  
JORGE LLORENTE-BOUSQUETS
Keyword(s):  
Electron Microscopy ◽  
Scanning Electron Microscopy ◽  
Costa Rica ◽  
Structural Features ◽  
Bibliographic Record ◽  
Scanning Electron

We describe and compare the morphology of the chorion in nine species belonging to five genera of the tribe Anthocharidini (Pieridae: Pierinae), from a sample of 12 females with mature eggs, the bibliographic record of oviposited eggs, and photographs of scanning electron microscopy (SEM). The eggs examined come from Mexico, Spain, Brazil and Costa Rica. Its characterization was made considering the main structural features of the chorion in this tribe; it includes a distinction of structures in the apical zone and differentiation between the chorionic regions. We attached to this work sheets, diagrams, and terminology to understand and clarify the descriptions. Our results agree with the proposal of Anthocharidini as the least derived tribe of the Pierinae, considering that Hebomoia, a specialized genus, is not part of it. Tribes such as Leptosiaini, Elodinini or Nepheroniini also have more chorionic characteristics related to more derived tribes of the Pierinae. 

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