scholarly journals Integrative Descriptions of Two New Mesobiotus Species (Tardigrada, Eutardigrada, Macrobiotidae) from Vietnam

Diversity ◽  
2021 ◽  
Vol 13 (11) ◽  
pp. 605
Author(s):  
Daniel Stec
Keyword(s):  
Electron Microscopy ◽  
Scanning Electron Microscopy ◽  
Dna Sequences ◽  
Phase Contrast ◽  
Genetic Data ◽  
Phylogenetic Position ◽  
Morphometric Data ◽  
Additional Species ◽  
Genus One ◽  
Scanning Electron

To date, 34 tardigrade taxa have been recorded from Vietnam and this includes only two macrobiotid species belonging to the genus Mesobiotus. In this paper, two additional species of this genus, one of the M. harmsworthi group and one of the M. furciger group, are reported and described as new for science (Mesobiotus imperialis sp. nov., Mesobiotus marmoreus sp. nov.). Both descriptions have an integrative character providing detailed morphological and morphometric data collected by phase contrast and scanning electron microscopy that are linked to genetic data. The latter constitute DNA sequences of molecular markers that are commonly used in tardigrade taxonomy. The genus phylogeny is also provided, elucidating the phylogenetic position of the newly discovered taxa.

scholarly journals Ecotone shifts in southern Madagascar: first barcoding data and six new species of the endemic millipede genus Riotintobolus (Spirobolida, Pachybolidae)

ZooKeys ◽  
2020 ◽  
Vol 953 ◽  
pp. 1-29
Author(s):  
Thomas Wesener
Keyword(s):  
Electron Microscopy ◽  
Scanning Electron Microscopy ◽  
New Species ◽  
Genetic Data ◽  
Molecular Data ◽  
Additional Species ◽  
Critically Endangered Species ◽  
Littoral Forest ◽  
Genetic Barcoding ◽  
Scanning Electron

Six new species of the Spirobolida millipede genus Riotintobolus Wesener, 2009, are described from the spiny forest in southern Madagascar utilising genetic barcoding, drawings and scanning electron microscopy: Riotintobolus tsimelahysp. nov., R. mangatsiakasp. nov., R. lavanonosp. nov., R. bovinussp. nov., R. antafokysp. nov. and R. makayisp. nov. One other Riotintobolus population from the spiny forest might represent an additional species based on genetic data, but it cannot be described as no male specimens were collected. At present, the genus Riotintobolus Wesener, 2009 has eight species from the spiny forest and two species from the littoral rainforest. A determination key to all ten species of the genus is provided. Molecular data reveal that the two critically endangered species from the humid littoral rainforest are not closely related to one another, but have their closest relative in the dry spiny forest ecosystem. Riotintobolus mandenensis Wesener, 2009, only known from the southern littoral rainforest of Mandena is related to R. tsimelahysp. nov. from the nearby spiny forest at Tsimelahy with a p-distance of 11%, while R. minutus Wesener, 2009 from the littoral forest of Sainte Luce is more distant to all other Riotintobolus species, but more closely related to R. bovinussp. nov. from the southwestern forest of the Makay.

Coelomomyces canadense stat. et comb. nov. (Blastocladiales: Coelomomycetaceae) from Psectrocladius sp. G (Diptera: Chironomidae)

1978 ◽  
Vol 56 (18) ◽  
pp. 2303-2306 ◽  
Author(s):  
Richard A. Nolan
Keyword(s):  
Electron Microscopy ◽  
Scanning Electron Microscopy ◽  
Phase Contrast ◽  
Field Phase ◽  
Species Status ◽  
Bright Field ◽  
Latin Diagnosis ◽  
Taxonomic Criterion ◽  
Sporangial Wall ◽  
Scanning Electron

Resistant sporangia of Coelomomyces chironomi var. canadense Weiser and McCauley were examined by bright-field, phase-contrast, and scanning electron microscopy (SEM). The use of SEM facilitated the observation of previously undescribed complex furrows in the sporangial wall. The taxonomic criterion for varietal status is discussed, and the variety is elevated to species status. Coelomomyces canadense (Weiser and McCauley) Nolan stat. et comb. nov. is described with an emended Latin diagnosis.

Taxonomy of the genus Craspedomerus Bernhauer, 1911 (Coleoptera: Staphylinidae: Philonthina) from China

Zootaxa ◽  
2010 ◽  
Vol 2506 (1) ◽  
pp. 1 ◽  
Author(s):  
LIANG LI ◽  
HONG-ZHANG ZHOU
Keyword(s):  
Electron Microscopy ◽  
Scanning Electron Microscopy ◽  
New Species ◽  
Species Identification ◽  
Geographical Distribution ◽  
Additional Species ◽  
Three New Species ◽  
First Time ◽  
Scanning Electron

Three new species of the genus Craspedomerus from China are described and illustrated: C. giganteus Li & Zhou sp. n. from Sichuan, C. gongshanus Li & Zhou sp. n. from Yunnan and C. zhangi Li & Zhou sp. n. from Tibet. Four species are reported for the first time from China: C. sinetuber (Coiffait, 1977a) from Tibet, C. cyanipennis Scheerpeltz, 1976b, C. ganeshensis Coiffait, 1983 and C. glenoides (Schubert, 1908) from Yunnan. These four and two additional species previously recorded from China (C. beckeri Bernhauer, 1934 and C. violaceipennis Cameron, 1928 are redescribed and illustrated. Sensory peg setae located on the underside of the paramere of the aedeagus of all nine Chinese species are compared using scanning electron microscopy (SEM) and the result shows that this character is useful for species identification. A key to the Chinese species of Craspedomerus is presented and geographical distribution of all sixteen species of Craspedomerus is mapped.

A new species of Epithemia Kützing (Bacillariophyceae, Rhopalodiales) from the Mula river, Western Ghats, India, with comments on the phylogenetic position of Rhopalodia and Epithemia

Phytotaxa ◽  
2021 ◽  
Vol 489 (2) ◽  
pp. 171-181
Author(s):  
ANBUKKARASU VIGNESHWARAN ◽  
YAN LIU ◽  
JOHN PATRICK KOCIOLEK ◽  
BALASUBRAMANIAN KARTHICK
Keyword(s):  
Electron Microscopy ◽  
Scanning Electron Microscopy ◽  
New Species ◽  
Western Ghats ◽  
Phylogenetic Position ◽  
Outline Shape ◽  
Specific Position ◽  
A New Species ◽  
Scanning Electron

A new species, Epithemia agharkarii sp. nov., is described from the Mula River, Western Ghats, India. The new species is described based on light and scanning electron microscopy; it is characterized by having lanceolate to slightly elliptical valves with rounded apices and being 16–38 μm long and 12.5–17.5 μm wide. Based on morphology, especially the atypical position of the raphe, it is similar to E. reicheltii. The new species is differentiated from the latter by the valve outline, shape of the apices, specific position of the raphe and breadth. We discuss the possible phylogenetic position of these two taxa and recent proposals related to the classification of Rhopalodia and Epithemia.

Brittle fracture of epidermal cells by liquid shear

1976 ◽  
Vol 20 (3) ◽  
pp. 699-705
Author(s):  
G.M. Gray ◽  
H.J. Yardley
Keyword(s):  
Electron Microscopy ◽  
Scanning Electron Microscopy ◽  
Phase Contrast ◽  
Epidermal Cells ◽  
Transmission Electron ◽  
The Press ◽  
Contrast Microscopy ◽  
Cell Fragments ◽  
Scanning Electron ◽  
Liquid Shear

A suspension of epidermal cells obtained from pig tail skin by trypsinization was subjected to high liquid-shear forces in a French press. The material issuing from the press was examined by phase-contrast microscopy, transmission electron microscopy and scanning electron microscopy. The cytoskeleton of tonofibrils retained the shape of cell fragments, and subcellular organelles remained enmeshed in the network of tonofibrils. Examination of some cell fragments by scanning electron microscopy revealed the internal organization of the tonofibrils. The relevance of these findings to the problem of isolating subcellular fractions from epidermis is discussed.

Hyphal interactions between a mycoparasite, Pythium nunn, and several soil fungi

1984 ◽  
Vol 30 (12) ◽  
pp. 1482-1487 ◽  
Author(s):  
R. Lifshitz ◽  
M. Dupler ◽  
Y. Elad ◽  
R. Baker
Keyword(s):  
Electron Microscopy ◽  
Scanning Electron Microscopy ◽  
Rhizoctonia Solani ◽  
Fusarium Oxysporum ◽  
Host Range ◽  
Phase Contrast ◽  
Soil Fungi ◽  
Limited Host Range ◽  
Pythium Nunn ◽  
Scanning Electron

The modes of hyphal interaction between a mycoparasite, Pythium nunn, and several soil fungi were studied by both phase-contrast and scanning-electron microscopy. In the zone of interaction, Pyth. nunn massively coiled around and subsequently lysed hyphae of Pyth. ultimum and Pyth. vexans. In contrast, Pyth. nunn penetrated and eventually parasitized hyphae of Rhizoctonia solani, Pyth. aphanidermatum, Phytophthora parasitica, and Phyto. cinnamomi by forming appressoriumlike structures. However, Pyth. nunn was not mycoparasitic against Fusarium oxysporum f.sp. cucumerinum or Trichoderma koningnii and was destroyed by T. harzianum and T. viride. These observations demonstrated that Pyth. nunn was a necrotrophic mycoparasite, with a limited host range and differential modes of action among suscepts.

Phase contrast and scanning electron microscopy of a soil amoeba, Hartmannella glebae

1986 ◽  
Vol 44 ◽  
pp. 300-301
Author(s):  
J. Upadhyay ◽  
M. J. Schurr ◽  
R. J. Lesseps
Keyword(s):  
Electron Microscopy ◽  
Scanning Electron Microscopy ◽  
Current Literature ◽  
Phase Contrast ◽  
The Other ◽  
Other Hand ◽  
As Species ◽  
Soil Amoeba ◽  
Scanning Electron

The genera Hartmannella and Acanthamoeba have been controversial. Some species of Acanthamoeba have been cited as species of Acanthamoeba, Mayorella, or Amoeba and a confusing lack of agreement persists in current literature. The genus Hartmannella was redefined by Page in 1967 to include those species which assumed a simple monopodial, limax-like form during locomotion and, where known, the cysts were smooth-walled and rounded with no opercula. The genus Acanthamoeba, on the other hand, possessed tapering, hyaline pseudopods (acanthopodia) and a cyst made up of an ectocyst and a polyhedral or stellate endocyst, with excystment by removal of opercula.

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