scholarly journals Two new species of Mallomonas (Chrysophyceae: Synurales): Mallomonas temonis and Mallomonas divida

Phytotaxa ◽  
2013 ◽  
Vol 87 (1) ◽  
pp. 11 ◽  
Author(s):  
YVONNE NĚMCOVÁ ◽  
JANA KREIDLOVÁ
Keyword(s):  
Electron Microscopy ◽  
South Africa ◽  
Scanning Electron Microscopy ◽  
New Species ◽  
Scale Morphology ◽  
Table Mountain ◽  
Silica Scale ◽  
Two New Species ◽  
Means Of Transmission ◽  
Scanning Electron

This paper describes two new species of Mallomonas. Mallomonas temonis was identified in the Table Mountain Plateau, South Africa; Mallomonas divida was identified in Aquitaine, France. The descriptions are based on silica-scale morphology studied by means of transmission and scanning electron microscopy. Mallomonas temonis belongs to the section Heterospinae. A scale is surrounded by a submarginal rib connected at lateral parts by a strong, more or less transversal rib. Mallomonas divida belongs to the section Torquatae. The shield of scales is covered by regularly arranged, delicate papillae and marked by one or several rows of more distinctive papillae.

Two new species of genus Mallomonas from swamp localities in Vietnam

Phytotaxa ◽  
2020 ◽  
Vol 468 (1) ◽  
pp. 121-129
Author(s):  
EVGENIY S. GUSEV ◽  
MAXIM S. KULIKOVSKIY
Keyword(s):  
Electron Microscopy ◽  
Scanning Electron Microscopy ◽  
New Species ◽  
Scale Morphology ◽  
Silica Scale ◽  
Small Scales ◽  
Two New Species ◽  
Means Of Transmission ◽  
Scanning Electron

Two new species, Mallomonas punctostriata sp. nov. and Mallomonas collucata sp. nov., are described from Vietnam based on silica-scale morphology studied by means of transmission and scanning electron microscopy. Both species inhabits swamp areas. Mallomonas punctostriata belongs to section Striatae. Its scales have unique transverse rows, consisting of papillae, resembling transverse ribs of members of section Striatae. Mallomonas collucata belongs to section Annulatae. This species has small scales with hexagonal reticulation on the shield. Mallomonas punctostriata was found in Phu Quoc Island (Kien Giang Province) and Cam Ranh Peninsula (Khanh Hoa Province). Mallomonas collucata has been observed only in one site on Phu Quoc Island.

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.

Two new species of the genus Mallomonas from the Cat Tien National Park (Viet Nam): Mallomonas distinguenda and Mallomonas skvortsovii

Phytotaxa ◽  
2016 ◽  
Vol 273 (1) ◽  
pp. 59 ◽  
Author(s):  
EVGENIY S. GUSEV ◽  
HAI DOAN-NHU ◽  
LAM NGUYEN-NGOC ◽  
DMITRY A. KAPUSTIN
Keyword(s):  
Electron Microscopy ◽  
Scanning Electron Microscopy ◽  
National Park ◽  
Viet Nam ◽  
Scale Morphology ◽  
Silica Scale ◽  
Two New Species ◽  
Means Of Transmission ◽  
Cat Tien National Park ◽  
Scanning Electron

Mallomonas distinguenda sp. nov. and Mallomonas skvortsovii sp. nov. are described from Dak Lua swamp, located in Cat Tien National Park (Dong Nai Province, Southeastern Viet Nam). The description is based on silica-scale morphology studied by means of transmission and scanning electron microscopy. These species belong to the section Papillosae based on scale morphology. The most characteristic feature for both taxa is the shield reticulation. In the case of Mallomonas distinguenda, it is an external reticulation. By contrast, Mallomonas skvortsovii has internal reticulation.

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.

Synura korshikovii sp. nov. (Chrysophyceae, Synurales), a new species from Ukraine

Phytotaxa ◽  
2015 ◽  
Vol 233 (2) ◽  
pp. 185 ◽  
Author(s):  
Dmitry Kapustin ◽  
Evgeniy Gusev
Keyword(s):  
Electron Microscopy ◽  
Scanning Electron Microscopy ◽  
New Species ◽  
Nature Reserve ◽  
Scale Morphology ◽  
Means Of Transmission ◽  
A New Species ◽  
Oval Body ◽  
Scanning Electron ◽  
Scale Types

A new species, Synura korshikovii sp. nov., is described from water reservoirs in the vicinities of Polisky Nature Reserve, Northern Ukraine, based on scale morphology studied by means of transmission and scanning electron microscopy. This species has three types of scales: spine-bearing oval body scales, spine-bearing prolonged transition scales and spineless ovate or circular caudal scales. All scale types are covered with hexagonal reticulum. The spine is clavate or cylindrical with flat apex terminating in a few rows of papillae-like teeth.

New phytoptids (Eriophyoidea, Phytoptidae) from southern African endemic dicotyledons: description of two new species of Solenocristus n. g. and updated key to world genera of the tribe Sierraphytoptini

2018 ◽  
Vol 23 (7) ◽  
pp. 1290 ◽  
Author(s):  
Philipp Chetverikov ◽  
Charnie Craemer ◽  
Stefan Neser ◽  
Sarah Zukoff
Keyword(s):  
Electron Microscopy ◽  
South Africa ◽  
Scanning Electron Microscopy ◽  
New Species ◽  
Western Cape ◽  
The World ◽  
Two New Species ◽  
Temperature Scanning ◽  
Scanning Electron ◽  
Conventional Light Microscopy

A new phytoptid genus and two new species, Solenocristus karooensis n. g. & n. sp. and S. searsius n. sp. (Phytoptidae, Sierraphytoptinae, Sierraphytoptini), were collected in the Eastern and Western Cape provinces of South Africa, from southern African endemic dicotyledonous trees Schotia afra (Fabaceae) and Searsia lucida (Anacardiaceae) respectively. They are described and illustrated with the aid of conventional light microscopy and low temperature scanning electron microscopy. Females of both new species possess a distinct pregenital plate divided into two parts by a subcuticular medial ridge. Additionally, in S. karooensis n. sp. the movable digit of the male chelicerae varies in length: among six observed males, three males had a movable digit (md) twice shorter than the fixed digit (fd), in one male it was slightly shorter than fd and in the remaining two males md and fd were of the same length. An updated key to the world genera of the tribe Sierraphytoptini is given. The key incorporates data on seven sierraphytoptine genera including three genera (Neoprothrix Reis & Navia, Solenoplatilobus Chetverikov & Craemer and Solenocristus n. g.) which were described since the last generic key of Eriophyoidea by Amrine et al. (2003) was published.

The genus Navicula (Bacillariophyceae, Naviculaceae) from the valley of the Adegoy River (Krasnodar Territory, Russia) and description of two new species

Phytotaxa ◽  
2021 ◽  
Vol 494 (2) ◽  
pp. 208-218
Author(s):  
DMITRY CHUDAEV ◽  
INGRID JÜTTNER ◽  
ZLATKO LEVKOV
Keyword(s):  
Electron Microscopy ◽  
Scanning Electron Microscopy ◽  
New Species ◽  
River Valley ◽  
Similar Species ◽  
Taxonomic Study ◽  
The Caucasus ◽  
Caucasus Region ◽  
Two New Species ◽  
Scanning Electron

This is the first detailed taxonomic study of the genus Navicula in the Krasnodar Territory of the Caucasus region, Russia. During the study of the genus in waterbodies of the Adegoy River valley 15 taxa were recorded. Two species, N. adegoyensis sp. nov. and N. pseudocryptofallax sp. nov., are described as new to science. Their morphology is studied by light and scanning electron microscopy, and comparisons with morphologically similar species are provided. The use of the name N. avenacea for N. lanceolata sensu auct. is discussed. Navicula diversity was higher in the Adegoy River than in pools elsewhere in the river valley.

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.

Comparison of two new species of astogloia Bacillariophyceae) with other small members of section Ellipticae

Phytotaxa ◽  
2013 ◽  
Vol 126 (1) ◽  
pp. 1 ◽  
Author(s):  
CHIARA PENNESI ◽  
MICHEL POULIN ◽  
FRIEDEL HINZ ◽  
TIZIANA ROMAGNOLI ◽  
MARIO DE STEFANO ◽  
...  
Keyword(s):  
Electron Microscopy ◽  
Scanning Electron Microscopy ◽  
New Species ◽  
Geographical Distribution ◽  
New Taxa ◽  
Related Species ◽  
The World ◽  
Two New Species ◽  
Scanning Electron

In this study, seven Mastogloia species belonging of the section Ellipticae are morphologically described through scanning electron microscopy, including two new taxa M. matthaei and M. stellae. They were collected as epiphytes on seagrasses from several tropical (Indonesia), subtropical (Egypt, Greece, Republic of Malta, Turkey) and temperate (Slovenia, Italy) regions of the world. All these species show typical characters of the Hustedt’s section Ellipticae: elliptical valve outline, a flat valve surface and rounded apices. Moreover, this study provides novel information on the frustule ultrastructure and gives update of their current geographical distribution. Some nomenclatural inconsistencies have been resolved with the typification of M. ovulum and the related species, M. emarginata, from the original Miang Besar material in the Hustedt collection.

Freshwater Bryozoa of Okinawa, Japan, with descriptions of Rumarcanella gen. nov. (Phylactolaemata: Plumatellidae) and two new species

Zootaxa ◽  
2011 ◽  
Vol 2732 (1) ◽  
pp. 1 ◽  
Author(s):  
MASATO HIROSE ◽  
SHUNSUKE F. MAWATARI
Keyword(s):  
Electron Microscopy ◽  
Scanning Electron Microscopy ◽  
New Species ◽  
New Genus ◽  
First Record ◽  
Molecular Study ◽  
Okinawa Island ◽  
Two New Species ◽  
Freshwater Bryozoa ◽  
Scanning Electron

We identified nine species of phylactolaemate bryozoans collected from ponds and dams on Okinawa Island, Japan. This is the first report on freshwater bryozoans from Okinawa and includes the first record of Plumatella javanica from Japan. Phylactolaemate species were identified on the basis of colony and statoblast morphology and are illustrated by light microscopy and scanning electron microscopy (SEM). We detected two new plumatellid species that, like Plumatella minuta and Plumatella vorstmani, have a transparent, weakly chitinized colony and hypertubercles on the floatoblast fenestra. A previous molecular study showed these four species to form a clade separate from Plumatella and Hyalinella. We here establish the new genus Rumarcanella to accommodate these species and describe Rumarcanella gusuku n. sp. and R. yanbaruensis n. sp. We discuss the dispersal of bryozoans to and from Japan by birds carrying statoblasts and provide a key to the Phylactolaemata of Japan.

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