Morphological Description and Taxonomy ofCompsopogonsp. (Compsopogonaceae,Rhodophyta) from Guangdong Province

Mayaca fluviatilis, an aquatic plant belonging to the monogeneric family Mayacaceae, native to tropical America, is reported here for the first time to be naturalized in Guangdong province, China. A morphological description, with detailed photographs, is provided for further taxonomic identification. Its invasive risk is evaluated according to its present propagation tendency.

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Encyonema chebalingense sp. nov., a new freshwater diatom species (Cymbellales, Bacillariophyceae) from Guangdong Province, China

Phytotaxa ◽

10.11646/phytotaxa.508.1.7 ◽

2021 ◽

Vol 508 (1) ◽

Author(s):

RUOHAN HUANG ◽

JIN MA ◽

XIANYUN WANG ◽

SAÚL BLANCO ◽

JOHN PATRICK KOCIOLEK ◽

...

Keyword(s):

New Species ◽

Central Area ◽

Guangdong Province ◽

Ventral Side ◽

Morphological Description ◽

Similar Species ◽

Dorsal Margin ◽

Nature Preserve ◽

Valve Structure ◽

Freshwater Diatom

During a survey of freshwater diatoms from Mojiang River, Chebaling Nature Preserve in Shaoguan City, Shixing County, Guangdong Province, China, a new Encyonema species, Encyonema chebalingense sp. nov., was discovered. Based on observations with light and scanning electron microscopy, a detailed morphological description of E. chebalingense is here presented. The main features of E. chebalingense include: conspicuously asymmetrical and dorsiventral, semielliptical to semielliptical–lanceolate valves, with a filiform raphe; dorsal margin clearly arched and ventral margin nearly straight or slightly concave; central area on the ventral side formed by 1–2 shorter central striae; and short tectullae projecting within the striae. The new species was compared with some similar species, all of which show similarities to E. chebalingense but differ in features such as dimensions, internal valve structure, stria density and valve shape. This genus is common and abundant in relatively clean waters, and other new species most likely will be recorded in the future from China.

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A scanning electron microscopic study of the veliger larvae of the scallop argopecten purpuratus

Proceedings, annual meeting, Electron Microscopy Society of America ◽

10.1017/s0424820100103486 ◽

1988 ◽

Vol 46 ◽

pp. 284-285

Author(s):

G.C. Bellolio ◽

K.S. Lohrmann ◽

E.M. Dupré

Keyword(s):

Morphological Description ◽

Electron Microscopic ◽

Larval Stages ◽

Scanning Electron Microscopic Study ◽

The Pacific ◽

Argopecten Purpuratus ◽

Veliger Larvae ◽

20 Nm ◽

Ethanol Series ◽

Scanning Electron

Argopecten purpuratus is a scallop distributed in the Pacific coast of Chile and Peru. Although this species is mass cultured in both countries there is no morphological description available of the development of this bivalve except for few characterizations of some larval stages described for culture purposes. In this work veliger larvae (app. 140 pm length) were examined by the scanning electron microscope (SEM) in order to study some aspects of the organogenesis of this species.Veliger larvae were obtained from hatchery cultures, relaxed with a solution of MgCl2 and killed by slow addition of 21 glutaraldehyde (GA) in seawater (SW). They were fixed in 2% GA in calcium free artificial SW (pH 8.3), rinsed 3 times in calcium free SW, and dehydrated in a graded ethanol series. The larvae were critical point dried and mounted on double scotch tape (DST). To permit internal view, some valves were removed by slightly pressing and lifting the tip of a cactus spine wrapped with DST, The samples were coated with 20 nm gold and examined with a JEOL JSM T-300 operated at 15 KV.

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Ultrastructure of periplasmic bodies in gram-negative bacteria

Proceedings, annual meeting, Electron Microscopy Society of America ◽

10.1017/s0424820100160753 ◽

1990 ◽

Vol 48 (3) ◽

pp. 640-641

Author(s):

Xie Nianming ◽

Ding Shaoqing ◽

Wang Luping ◽

Yuan Zenglin ◽

Zhan Guolai ◽

...

Keyword(s):

Electron Microscope ◽

Campylobacter Jejuni ◽

Proteus Mirabilis ◽

Shigella Flexneri ◽

Morphological Description ◽

Gram Negative Bacteria ◽

Periplasmic Space ◽

Clostridium Tetani ◽

Gram Negative ◽

Brucella Canis

Perhaps the data about periplasmic enzymes are obtained through biochemical methods but lack of morphological description. We have proved the existence of periplasmic bodies by electron microscope and described their ultrastructures. We hope this report may draw the attention of biochemists and mrophologists to collaborate on researches in periplasmic enzymes or periplasmic bodies with each other.One or more independent bodies may be seen in the periplasmic space between outer and inner membranes of Gram-negative bacteria, which we called periplasmic bodies. The periplasmic bodies have been found in seven species of bacteria at least, including the Pseudomonas aeroginosa. Shigella flexneri, Echerichia coli. Yersinia pestis, Campylobacter jejuni, Proteus mirabilis, Clostridium tetani. Vibrio cholerae and Brucella canis.

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Benefits of the Tram System in Zhuhai, Guangdong Province, China

ICTE 2015 ◽

10.1061/9780784479384.030 ◽

2015 ◽

Author(s):

Lin Hong ◽

Ying Jiang ◽

Yaqian Li ◽

Zekai Xu ◽

Fan Li ◽

...

Keyword(s):

Guangdong Province

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Digenean parasites in prosobranch snail Lithoglyphus naticoides population with the morphological description of Echinochasmus sp. cercaria

Ekologija ◽

10.2478/v10055-008-0037-6 ◽

2008 ◽

Vol 54 (4) ◽

pp. 251-255 ◽

Cited By ~ 6

Author(s):

Gražina Stanevičiūtė ◽

Romualda Petkevičiūtė ◽

Valerija Kiselienė

Keyword(s):

Morphological Description ◽

Prosobranch Snail ◽

Lithoglyphus Naticoides

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Russian and English terminological glossary on morphology of diatoms

Novosti sistematiki nizshikh rastenii ◽

10.31111/nsnr/2018.52.2.265 ◽

2018 ◽

Vol 52 (2) ◽

pp. 265-309 ◽

Cited By ~ 5

Author(s):

R. M. Gogorev ◽

D. A. Chudaev ◽

V. A. Stepanova ◽

M. S. Kulikovskiy

Keyword(s):

Morphological Description ◽

Key Terms

The present work is an attempt to summarize, systematize, supplement and clarify the terms used in morphological description of diatoms and their taxonomy (systematics). Two glossaries (Russian and English) include definitions of near 300 key terms (excluding their synonyms) and their Latin translations.

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The first record of Jaapia ochroleuca (Basidiomycota) in the European part of Russia

Novosti sistematiki nizshikh rastenii ◽

10.31111/nsnr/2013.47.68 ◽

2013 ◽

Vol 47 ◽

pp. 68-73

Author(s):

S. V. Volobuev

Keyword(s):

Nature Reserve ◽

First Record ◽

European Part ◽

European Russia ◽

Taxonomic Position ◽

Morphological Description ◽

Microscopic Structure ◽

European Part Of Russia ◽

Distribution And Ecology ◽

First Time

The corticioid basidiomycete Jaapia ochroleuca (Bres.) Nannf. et J. Erikss. is recorded for the first time in the European Russia from the «Bryansky Les» Nature Reserve (Bryansk Region). The taxonomic position of the species is defined briefly. Its morphological description and data on distribution and ecology are provided. The details of microscopic structure of the collected specimen are illustrated.

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