Mallomonas lusca sp. nov. (Synurales, Chrysophyceae)—a rare species from Southeast Asia

Phytotaxa ◽  
2021 ◽  
Vol 529 (1) ◽  
pp. 105-112
Author(s):  
EVGENIY GUSEV ◽  
ELENA KEZLYA
Keyword(s):  
Electron Microscopy ◽  
Transmission Electron Microscopy ◽  
New Species ◽  
Southeast Asia ◽  
Rare Species ◽  
Central Area ◽  
Scale Morphology ◽  
Transmission Electron ◽  
Silica Scale ◽  
A New Species

A new species of tropical chrysophyte algae, Mallomonas lusca sp. nov. is described from Vietnam based on silica-scale morphology observed using scanning and transmission electron microscopy. Scales of this species were previously found in Malaysia, but had not yet been described. Mallomonas lusca belongs to section Torquatae and is most similar to M. favosa. Its scales have a unique conspicuous rounded pit with a raised thickened central area, which develops in association with the posterior pore in the angle of the posterior submarginal rib. This rounded pit is surrounded by delicate papillae across the border on the shield. Mallomonas lusca has been observed in six localities in Vietnam and one in Malaysia.

Mallomonas gusakovii sp. nov. (Chrysophyceae, Synurales), a new species from Phu Quoc Island, Vietnam

Phytotaxa ◽  
2019 ◽  
Vol 406 (3) ◽  
pp. 199-205
Author(s):  
EVGENIY S. GUSEV ◽  
DMITRY A. KAPUSTIN ◽  
NIKITA A. MARTYNENKO ◽  
ELENA E. GUSEVA ◽  
MAXIM S. KULIKOVSKIY
Keyword(s):  
Electron Microscopy ◽  
Scanning Electron Microscopy ◽  
New Species ◽  
Scale Morphology ◽  
Southern Vietnam ◽  
Silica Scale ◽  
Different Types ◽  
Means Of Transmission ◽  
A New Species ◽  
Scanning Electron

Mallomonas gusakovii sp. nov. is described from Vietnam based on silica-scale morphology studied by means of transmission and scanning electron microscopy. This species belongs to section Quadratae and is characterized by large and broad scales of three types with an internal reticulation, V-shaped rib and a forward projecting wing. Different types of the V-shaped rib in taxa from section Quadratae are discussed. Scales of Mallomonas gusakovii were found only in two sites in Phu Quoc Island, Southern Vietnam.

A new species of aplanosporic Haptoglossa, H. beakesii, with vesiculate spore release

Botany ◽  
2010 ◽  
Vol 88 (1) ◽  
pp. 93-101 ◽  
Author(s):  
S. L. Glockling ◽  
L. C. Serpell
Keyword(s):  
Electron Microscopy ◽  
Transmission Electron Microscopy ◽  
New Species ◽  
Light Microscopy ◽  
Dense Body ◽  
Central Nucleus ◽  
Transmission Electron ◽  
Spore Release ◽  
The University ◽  
A New Species

A new species of Haptoglossa , Haptoglossa beakesii sp. nov., a nematode parasite found in a sample of compost and rabbit dung at the University of Sussex campus, is described. The species, which infects nematodes of the genus Rhabditis , is unusual because it releases non-motile spores into a retaining vesicle. Aspects of the development and reproduction of the species are illustrated with light microscopy and transmission electron microscopy (TEM). TEM revealed a typical multinucleate thallus which cleaved into un-walled aplanospore initials. Each aplanospore contained a central nucleus closely surrounded by mitochondria and with peripheral dense body vesicles (DBV) and distinctive, layered, encystment vesicles. Aplanospores were expelled into a fine vesicle which later broke down to release cysts. Cysts germinated to produce infective gun cells.

Taxonomy and ultrastructure of Sinerima, a new genus of diatoms (Bacillariophyta), with a description of a new species, S. marigela

Phytotaxa ◽  
2018 ◽  
Vol 351 (3) ◽  
pp. 197
Author(s):  
ANNA NESTEROVICH ◽  
BETH E. CAISSIE
Keyword(s):  
Electron Microscopy ◽  
Transmission Electron Microscopy ◽  
New Species ◽  
Sea Ice ◽  
New Genus ◽  
Surface Sediments ◽  
Monotypic Genus ◽  
Transmission Electron ◽  
Spring Sea Ice ◽  
A New Species

Based on light, scanning and transmission electron microscopy observations, a detailed description of a new marine fultoportulate diatom Sinerima marigela gen. et sp. nov. is presented. This new taxa is rare (<3% of the thanatocoenosis) in surface sediments in the Bering and Chukchi seas, but appears to have an association with high spring sea ice concentrations. The new monotypic genus is distinct due to its 1) lack of rimoportulae, 2) one-layer valves with marginal pseudoloculi, 3) characteristic velum composed of a cluster of short tubes, and 4) central part without either central fultoportulae or an annulus. This set of characters, especially the lack of rimoportulae, makes S. marigela unique and easily distinguishable from other fultoportulate diatoms.

A new haplosclerid sponge species from the Red Sea

2001 ◽  
Vol 81 (6) ◽  
pp. 943-948 ◽  
Author(s):  
Jean Vacelet ◽  
Abdulmohsin Al Sofyani ◽  
Sultan Al Lihaibi ◽  
Jean-Michel Kornprobst
Keyword(s):  
Electron Microscopy ◽  
Transmission Electron Microscopy ◽  
New Species ◽  
Coral Reefs ◽  
Red Sea ◽  
Sponge Species ◽  
Blue Colour ◽  
Transmission Electron ◽  
Cytological Features ◽  
A New Species

A new species of Chalinula (Haplosclerida: Chalinidae), C. saudiensis, is described from the coral reefs of the Red Sea off Jeddah. The new species is remarkable in its vivid blue colour and its bioactivity. Its description includes cytological features in transmission electron microscopy.

Four new Mallomonas species of the Torquatae series (Chrysophyceae)

1984 ◽  
Vol 62 (8) ◽  
pp. 1583-1591 ◽  
Author(s):  
K. H. Nicholls
Keyword(s):  
Electron Microscopy ◽  
Transmission Electron Microscopy ◽  
New Species ◽  
Scale Structure ◽  
Transmission Electron ◽  
Silica Scale ◽  
Constant Structure

Four new species of Mallomonas (Chrysophyceae), Mallomonas scrobiculata sp. nov., Mallomonas serrata sp. nov., Mallomonas labrinthina sp. nov., and Mallomonas favosa sp. nov., are described from transmission electron microscopy of silica-scale structure of specimens from lakes and ponds in Ontario, Canada. All four are of the Torquatae series (characterized by the uniquely shaped anterior collar scales with attached bristles and rhomboidal body scales lacking bristles) and are distinguished from others in the series (e.g., M. mangofera Harris & Bradley, M. alveolata Dürrschmidt, and M. pumilio H. & B. em. Asm. Cronb. & Dürrs.) by the distinctive (and constant) structure and ornamentation of their scales.

Mallomonas papuensis sp. nov. (Chrysophyceae, Synurales), a new species from the high mountain bog pool in Papua province, Indonesia

Phytotaxa ◽  
2019 ◽  
Vol 402 (6) ◽  
pp. 281 ◽  
Author(s):  
DMITRY A. KAPUSTIN ◽  
EVGENIY S. GUSEV ◽  
MAXIM S. KULIKOVSKIY
Keyword(s):  
Electron Microscopy ◽  
Scanning Electron Microscopy ◽  
New Species ◽  
High Mountain ◽  
Scale Morphology ◽  
Silica Scale ◽  
Means Of Transmission ◽  
A New Species ◽  
Scanning Electron

This paper describes the new species Mallomonas papuensis from a small bog pool in Papua province, Indonesia. The description is based on silica-scale morphology studied by means of transmission and scanning electron microscopy. The cells of Mallomonas papuensis are covered by three types of scales: asymmetric collar scales with forward projecting spines, rhombic body scales and oval posterior scales with short spines. The shield of all scales types lacks ornamentation. We were not able to find any specimens with bristles or isolated bristles although the small dome is visible on the collar scales. Mallomonas papuensis belongs to the section Torquatae and closely resembles M. newfoundlandicus. Distinctions from other similar taxa are discussed.

Mallomonas loricata sp. nov. (Synurales, Chrysophyceae), a new tropical species from section Planae

Phytotaxa ◽  
2021 ◽  
Vol 500 (3) ◽  
pp. 225-233
Author(s):  
EVGENIY GUSEV ◽  
NATALIYA SHKURINA ◽  
MAXIM KULIKOVSKIY
Keyword(s):  
Electron Microscopy ◽  
New Species ◽  
Tropical Species ◽  
Scale Morphology ◽  
Habitat Conditions ◽  
Similar Morphology ◽  
Silica Scale ◽  
Secondary Layer ◽  
A New Species ◽  
Scanning Electron

A new species, Mallomonas loricata sp. nov., is described from Vietnam based on silica-scale morphology studied using transmission and scanning electron microscopy. The species belongs to section Planae and has similar morphology to species from the Mallomonas matvienkoae complex. The new species is characterized by obovoid scales with a thick secondary layer with internal reticulation that covers almost whole surface of the scale. Scales of Mallomonas loricata were found at twenty-four localities of eight provinces in northern, central and southern areas of Vietnam. Scales of this new species have also been previously reported from Singapore and Malaysia. The distribution and habitat conditions of the new species are summarized.

A new species, Synura morusimila sp. nov. (Chrysophyta), from Great Xing’an Mountains, China

Phytotaxa ◽  
2013 ◽  
Vol 88 (3) ◽  
pp. 55 ◽  
Author(s):  
WANTING PANG ◽  
QUANXI WANG
Keyword(s):  
Electron Microscopy ◽  
Transmission Electron Microscopy ◽  
New Species ◽  
The Body ◽  
Transmission Electron ◽  
Great Xing’An Mountains ◽  
A New Species ◽  
Scale Types

A new species Synura morusimila sp. nov. was described from Great Xing’an Mountains, China. The colonies, scales and stomatocysts were observed using light, scanning and transmission electron microscopy. This Synura has two scale types on the same cell: spineless caudal scales and spine-bearing body scales. The caudal scales are ovate to obovate with small pores in the back of the scale. The body scales are characterized by cylindrical spine and the irregular reticulum on the base of the spine. The colony is large and oblong in shape with stomatocysts in it. The stomatocyst of Synura morusimila was named Stomatocyst 55, which is also new to science.

A new species of Neidiomorpha (Bacillariophyceae) from Dianshan Lake in Shanghai, China

Phytotaxa ◽  
2019 ◽  
Vol 423 (2) ◽  
pp. 99-104
Author(s):  
FEN LUO ◽  
QI YANG ◽  
KAIJUAN GUO ◽  
TENGTENG LIU ◽  
QUANXI WANG ◽  
...  
Keyword(s):  
Electron Microscopy ◽  
Scanning Electron Microscopy ◽  
New Species ◽  
Central Area ◽  
Diatom Species ◽  
Dianshan Lake ◽  
A New Species ◽  
Scanning Electron

A new diatom species, Neidiomorpha dianshaniana sp. nov., found in Dianshan Lake in Shanghai, China, is described herein. The morphology of N. dianshaniana has been documented by light and scanning electron microscopy. Neidiomorpha dianshaniana valves are elliptical in outline with rostrate apices. Raphe is almost straight and filiform. The axial area is narrow and linear. The central area is small, round to transversely elliptical or irregular. Striae are slightly radiate and almost parallel near the apices. Puncta are arranged in undulating longitudinal rows. Neidiomorpha dianshaniana’s most visible feature is its lack of central constriction, in which respect it differs from the three other species in the genus Neidiomorpha.

A new species of the genus Mallomonas (Synurales, Chrysophyceae), Mallomonas fimbriata, sp. nov.

Phytotaxa ◽  
2015 ◽  
Vol 195 (4) ◽  
pp. 291 ◽  
Author(s):  
Evgeniy Sergeevich Gusev
Keyword(s):  
New Species ◽  
Distal Part ◽  
Scale Morphology ◽  
Special Group ◽  
Silica Scale ◽  
Central Vietnam ◽  
Means Of Transmission ◽  
A New Species ◽  
Oval Body ◽  
Scanning Electron

Mallomonas fimbriata, sp. nov. is described from bog pool, located in Cam Ranh Peninsula, Khanh Hoa Province, Central Vietnam. The description is based on silica-scale morphology studied by means of transmission and scanning electron microscopy. New species has 3 types of scales: oval body scales, caudal ones with robust, long, forward pointing spines and elongated, widened to distal part apical scales. Scales are thick, 3-layered, with inner reticulation. Mallomonas fimbriata and the similar M. fenestrata form a special group with unique features of scales structure close to the sections Retrorsae and Quadratae.

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