On Filipinodiaptomus Lai, Mamaril Sr. & Fernando, 1979 (Calanoida, Diaptomidae): redescription and re-allocation of the Philippine endemic Diaptomus vexillifer Brehm, 1933

Crustaceana ◽  
2019 ◽  
Vol 92 (5) ◽  
pp. 513-536
Author(s):  
Huiming Li ◽  
Shea K. P. Guinto ◽  
Rey D. S. Papa ◽  
Bo-Ping Han ◽  
Francis S. Magbanua ◽  
...  
Keyword(s):  
Electron Microscopy ◽  
Scanning Electron Microscopy ◽  
Original Description ◽  
Type Locality ◽  
Morphological Comparison ◽  
Endemic Genus ◽  
Mtcoi Gene ◽  
Scanning Electron

Abstract The original description of Diaptomus vexillifer Brehm, 1933, endemic to Lake Danao (Leyte Island), was elementary and lacking taxonomically satisfactory characters. In this paper, we redescribe the Philippine-endemic genus Filipinodiaptomus Lai, Mamaril Sr. & Fernando, 1979 and the species D. vexillifer collected from its type locality, using light and scanning electron microscopy and an analysis of the mtCOI gene and the ITS of the nuclear 18S operon. We found that D. vexillifer is the second species under this endemic genus. A neotype and paraneotypes are hereby designated. Also a detailed morphological comparison is made between Filipinodiaptomus vexillifer (Brehm, 1933) comb. nov. and Filipinodiaptomus insulanus (Wright, 1928). Their taxonomic characters, interspecies relationship, and biogeography are likewise discussed.

External ultrastructure of Progonoia diatreta sp. nov. (Bacillariophyta, Scoliotropidaceae) differs from P. musca and P. intercedens comb. nov.

Phytotaxa ◽  
2015 ◽  
Vol 234 (3) ◽  
pp. 246 ◽  
Author(s):  
Christopher S. Lobban
Keyword(s):  
Electron Microscopy ◽  
Scanning Electron Microscopy ◽  
20Th Century ◽  
Ultrastructural Study ◽  
Original Description ◽  
Undescribed Species ◽  
Calcareous Sand ◽  
Authentic Material ◽  
Valve Structure ◽  
Scanning Electron

Navicula musca was described by Gregory in 1857 as having moniliform areolae in unbroken striae; a detailed ultrastructural study by Schrader, who transferred the species to Progonoia in 1971, was consistent with the original description. However, going back at least to Peragallo & Peragallo at the turn of the 20th century, the same species has been described as having alveoli with fine puncta around the edge and a longitudinal break in the striae. I found examples of both forms in a collection of calcareous sand from Guam, examined them with light and scanning electron microscopy, and also examined authentic material of N. musca in the light microscope. I conclude that one of these taxa is consistent with N. intercedens, which must be removed from synonymy with P. musca, and that the form with the fine puncta is an undescribed species not previously observed ultrastructurally. This species, P. diatreta sp. nov., has an internal valve structure that clearly places it in Progonoia, but an external structure quite different from that of its congeners.

scholarly journals Studies on the genus Setaria Viborg, 1795 in South Africa. III. Setaria thwaitei Mönnig, 1933

2004 ◽  
Vol 71 (2) ◽  
Author(s):  
R. Watermeyer ◽  
J. Boomker ◽  
J.F. Putterill
Keyword(s):  
Electron Microscopy ◽  
South Africa ◽  
Scanning Electron Microscopy ◽  
Original Description ◽  
Valid Species ◽  
The North ◽  
Roan Antelope ◽  
Hippotragus Equinus ◽  
North And South ◽  
Scanning Electron

Mönnig (1933) described Setaria thwaitei from a sable antelope, Hippotragus niger, the type host, as well as from roan antelope, Hippotragus equinus, and waterbuck, Kobus ellipsiprymnus. Yeh (1959) considered Setaria thwaitei to be synonym of Setaria hornbyi. Material collected from roan antelopes, sable antelopes and gemsbuck, Oryx gazella, from several localities in the north and south of South Africa, together with Mönnig's (1933) material, were re-examined. Measurements of the adult worms obtained in this study were compared with those in the original description of the species. Scanning electron microscopy of the anterior and posterior regions of the female worms confirmed S. thwaitei as a valid species.

scholarly journals Description of the first species of Glomeridesmida from Thailand (Diplopoda, Glomeridesmida, Glomeridesmidae)

ZooKeys ◽  
2021 ◽  
Vol 1024 ◽  
pp. 137-156
Author(s):  
Thomas Wesener ◽  
Nattarin Wongthamwanich ◽  
Leif Moritz
Keyword(s):  
Electron Microscopy ◽  
Scanning Electron Microscopy ◽  
South America ◽  
Morphological Characters ◽  
Southern India ◽  
Type Locality ◽  
Se Asia ◽  
The Family ◽  
First Time ◽  
Scanning Electron

With three genera and 35 previously known species from India, SE Asia, Central and South America, Glomeridesmida are one of the least diverse Diplopoda groups. Here we describe Glomeridesmus siamensissp. nov., the first species of the order Glomeridesmida from Thailand. The geographically nearest confamiliar species have been described from southern India, Sumatra and Java. The species is described combining photographs, light- and scanning electron microscopy of mature and younger males, females and juveniles. Several characters are illustrated for the first time for an Asian representative of the family Glomeridesmidae. In addition to the type locality of G. siamensissp. nov. from Krabi province, locality data of unidentified Glomeridesmus from Thailand are also given. These data are providing further evidence that the Glomeridesmida are not uncommon, but overlooked as they are small and difficult to collect. The unusual telopods and other morphological characters of G. siamensissp. nov. differ considerably from the few Glomeridesmus males described from Central and South America as well as from India, but the unclear status of two generic names available for species from Indonesia prevents us from adding another generic name to this small and understudied order.

Ninastrelnikovia lateritica sp. nov., a new and rare freshwater diatom species from the rocky pools of the Western Ghats, India with a note on the genus Ninastrelnikovia Lange-Bertalot & A.Fuhrmann (Bacillariophyta)

Phytotaxa ◽  
2019 ◽  
Vol 394 (1) ◽  
pp. 59
Author(s):  
SURAJIT ROY ◽  
JOHN PATRICK KOCIOLEK ◽  
REX L. LOWE ◽  
BALASUBRAMANIAN KARTHICK
Keyword(s):  
Electron Microscopy ◽  
Scanning Electron Microscopy ◽  
Western Ghats ◽  
Morphological Features ◽  
Diatom Species ◽  
Morphological Comparison ◽  
Valve Margin ◽  
The Western Ghats ◽  
Scanning Electron ◽  
Freshwater Diatom

Ninastrelnikovia lateritica sp. nov., a new and rare freshwater biraphid diatom species was discovered from a rocky ephemeral pool of the Kaas plateau, Western Ghats, and described on the basis of light and scanning electron microscopy observations. A morphological comparison with the two other described Ninastrelnikovia taxa is provided. This new species can easily be separated from its congeners by the shape of the valve apex and absence of any second inflation along the valve margin, as well as the shape and structure of the external distal raphe ends and internal proximal raphe ends. The members of Ninastrelnikovia are characterized by two morphological types of valves. Valves on the ends of colonies exhibit one set of morphological features while valves located in the middle of colonies show another set of morphological features. Morphological details of the valves are discussed.

Scanning electron microscopy of Chordodes moutoni Camerano, 1895 (Gordiida, Nematomorpha)

Zootaxa ◽  
2005 ◽  
Vol 1082 (1) ◽  
pp. 37 ◽  
Author(s):  
FERNANDA ZANCA ◽  
CRISTINA DE VILLALOBOS
Keyword(s):  
Electron Microscopy ◽  
Scanning Electron Microscopy ◽  
Sexual Dimorphism ◽  
Distribution Pattern ◽  
Original Description ◽  
Male And Female ◽  
Different Types ◽  
Horse Hair ◽  
Distinct Distribution ◽  
Scanning Electron

Taxonomic characters of both male and female horse-hair worms Chordodes moutoni Camerano, 1895 (Nematomorpha) are re-described using scanning electron microscopy. The features are compared with the original description. C. moutoni cuticle has five different areolar types in male while female have six types of areoles. The crowned areoles, characteristic of Chordodes, are surrounded by other areoles forming pairs or clusters. Sexual dimorphism was found in the cuticular pattern, the female showing two different types of crowned areoles with distinct distribution pattern while the male has only one type of crowned areoles. These data are compared to other Chordodes species that have been studied.

Morphological comparison and identification of metacercariae in the ‘pygmaeus’ group of microphallids, parasites of seabirds in western palaearctic regions

1997 ◽  
Vol 71 (2) ◽  
pp. 167-174 ◽  
Author(s):  
D.H. Saville ◽  
K.V. Galaktionov ◽  
S.W.B. Irwin ◽  
I.I. Malkova
Keyword(s):  
Electron Microscopy ◽  
Scanning Electron Microscopy ◽  
Northern Ireland ◽  
Critical Assessment ◽  
Littorina Saxatilis ◽  
Morphological Comparison ◽  
Gastropod Mollusc ◽  
Western Palaearctic ◽  
Arctic Russia ◽  
Scanning Electron

AbstractThis study compares the metacercariae of a ‘pygmaeus’ microphallid discovered in Littorina saxatilis from the coast of Northern Ireland with the metacercariae of Microphallus piriformes and M. pygmaeus from the same species of gastropod mollusc from Arctic Russia. Light and scanning electron microscopy were used to provide morphometric and surface details for descriptions of the organisms concerned. Comparison and statistical analysis of the results established that the species from Northern Ireland was M. piriformes and not M. pygmaeus as had previously been assumed. It dearly indicates the need for critical assessment of the accuracy of literature dealing with the occurrence of ‘M. pygmaeus’ in both intermediate and final hosts.

Scanning electron microscopy and intraspecific variation in Euchordodes nigromaculatus from New Zealand

1998 ◽  
Vol 72 (1) ◽  
pp. 65-70 ◽  
Author(s):  
A. Schmidt-Rhaesa ◽  
F. Thomas ◽  
R. Poulin
Keyword(s):  
Electron Microscopy ◽  
Scanning Electron Microscopy ◽  
New Zealand ◽  
Intraspecific Variation ◽  
Body Length ◽  
Original Description ◽  
The Body ◽  
Body Cuticle ◽  
Cloacal Opening ◽  
Scanning Electron

AbstractTaxonomic characters of the male posterior end and the body cuticle of Euchordodes nigromaculatus (Nematomorpha) were described by scanning electron microscopy (SEM) and compared with the original description by Poinar (1991a) and with other Euchordodes species. Intraspecific variation was found in the body length, the distance between the cloacal opening and the posterior end and especially in the form of the male posterior end. The latter either possesses two short lobelike structures and a ventral groove or lacks these structures. The importance of SEM investigations and observations of intraspecific variation is stressed for the taxonomy of nematomorph species.

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