scholarly journals Two New Species of the Mite Genus Stereotydeus Berlese, 1901 (Prostigmata: Penthalodidae) from Victoria Land, and a Key for Identification of Antarctic and Sub-Antarctic Species

Taxonomy ◽  
2021 ◽  
Vol 1 (2) ◽  
pp. 116-141
Author(s):  
Claudia Brunetti ◽  
Henk Siepel ◽  
Pietro Paolo Fanciulli ◽  
Francesco Nardi ◽  
Peter Convey ◽  
...  
Keyword(s):  
Electron Microscopy ◽  
Scanning Electron Microscopy ◽  
Mite Species ◽  
Apical Segment ◽  
Antarctic Species ◽  
Victoria Land ◽  
Continental Antarctica ◽  
Two New Species ◽  
Mite Genus ◽  
Scanning Electron

Two new mite species belonging to the genus Stereotydeus Berlese, 1901 were discovered from locations along the coast of Victoria Land, continental Antarctica. Previous records of this genus in the area under study only reported the presence of S. belli and S. mollis. Although those studies included no morphological analyses, it has since been assumed that only these species were present within the area. Specimens of S. ineffabilis sp. nov. and S. nunatakis sp. nov. were obtained, sometimes in sympatry, from four different localities in Central and South Victoria Land and are here described and illustrated using optical and scanning electron microscopy (SEM) techniques. Features useful for identification of the two new Stereotydeus species include the size of the specimens, the length of the apical segment of pedipalps, the presence/absence of division of the femora, the position of solenidia, the shape and disposition of the rhagidiform organs on the tarsi, the shape of the apical setae of the tarsi, the numbers of aggenital setae and the position of the anal opening. A key to 14 of the 15 currently described Antarctic and sub-Antarctic Stereotydeus species is provided.

Jurassic conchostracans from Carapace Nunatak, southern Victoria Land, Antarctica

1994 ◽  
Vol 6 (1) ◽  
pp. 105-113 ◽  
Author(s):  
Shen Yanbin
Keyword(s):  
Electron Microscopy ◽  
Scanning Electron Microscopy ◽  
Middle Jurassic ◽  
New Genus ◽  
New Genus And Species ◽  
Victoria Land ◽  
Number Of Individuals ◽  
Scanning Electron

Fossiliferous horizons of the Ferrar Group at Carapace Nunatak of southern Victoria Land have yielded the richest and most diverse freshwater Jurassic biota hitherto recorded from Antarctica. Fossil conchostracans are the most important in terms of number of individuals and distributional area. Scanning electron microscopy is used to establish a new genus and species (Carapacestheria balli), and Cyzicus (Lioestheria) disgregaris Tasch is attributed to Carapacestheria disgregaris (Tasch) emend. The conchostracan fauna of the Ferrar Group, characterized by Carapacestheria, is probably of early Middle Jurassic age.

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.

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.

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.

A review of the genus Brachysira in Ireland with the description of Brachysira praegeri and Brachysira conamarae, new raphid diatoms (Bacillariophyceae) from high status waterbodies

Phytotaxa ◽  
2017 ◽  
Vol 326 (1) ◽  
pp. 1 ◽  
Author(s):  
BRYAN KENNEDY ◽  
NORMAN ALLOTT
Keyword(s):  
Electron Microscopy ◽  
Water Quality ◽  
Scanning Electron Microscopy ◽  
New Records ◽  
Full Range ◽  
Water Quality Assessment ◽  
Algal Flora ◽  
High Status ◽  
Two New Species ◽  
Scanning Electron

The genus Brachysira is frequently encountered in the algal flora of oligotrophic freshwaters. In order to re-evaluate its diversity in Irish waters, light and scanning electron microscopy was used to examine populations at 209 river sites and in 85 lakes. The full range of morphological variation of all common and sometimes challenging Brachysira populations was investigated. The study revealed two new species, Brachysira praegeri sp. nov. and Brachysira conamarae sp. nov. and compared them to all closely related taxa. The study also recorded B. intermedia and B. neglectissima which are new records for Ireland. Further taxonomic clarification is required for a diatom resembling B. intermedia and the complex of taxa around the polymorphic B. microcephala. Individual Brachysira taxa differed with respect to their optima along an alkalinity-pH gradient, but the trophic requirements of all forms were comparable, suggesting that species may be merged for routine water quality assessment. Nevertheless, it is recommended that Brachysira morphotypes be enumerated separately until their taxonomy is more fully resolved and their significance for the biodiversity of epilithic communities has been clearly established.

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.

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.

Two new species of the genus Panorpa (Mecoptera: Panorpidae)  from Shaanxi, China with notes on their biology

Zootaxa ◽  
2007 ◽  
Vol 1542 (1) ◽  
pp. 59-67 ◽  
Author(s):  
XUE LI ◽  
BAOZHEN HUA ◽  
LIJUN CAI ◽  
PENGYING HUANG
Keyword(s):  
Electron Microscopy ◽  
Scanning Electron Microscopy ◽  
New Species ◽  
Larval Stage ◽  
Male Genitalia ◽  
Shaanxi Province ◽  
Type Specimens ◽  
Two New Species ◽  
Scanning Electron

Two new species of scorpionflies, Panorpa byersi Hua et Huang and Panorpa brevicornis Hua et Li, from Shaanxi Province, China, are described and illustrated. Their male genitalia were observed under scanning electron microscopy. Their biology is briefly noticed with larval stage obtained through rearing. The type specimens are preserved in the Entomological Museum, Northwest A & F University.

Two new Orthoseira species (Bacillariophyceae) from lava tubes on Île Amsterdam and Big Island (Hawai΄i)

Phytotaxa ◽  
2013 ◽  
Vol 111 (1) ◽  
pp. 39 ◽  
Author(s):  
REX L. LOWE ◽  
J. PATRICK KOCIOLEK ◽  
BART VAN DE VIJVER
Keyword(s):  
Electron Microscopy ◽  
Scanning Electron Microscopy ◽  
New Species ◽  
Lava Tubes ◽  
Face Surface ◽  
Two New Species ◽  
Scanning Electron

Two new species of Orthoseira from lava tubes on Île Amsterdam and Big Island (Hawai΄i) are described using light and scanning electron microscopy: Orthoseira johansenii Lowe & Kociolek sp. nov., from Hawai’i, and O. verleyenii Van de Vijver sp. nov., from the subantarctic. Both species have flat valve surfaces, the striae on the mantle are composed of uniseriate areolae and the valve face areolae are small and more or less irregularly scattered, occupying almost 2/3 of the total valve face surface. The areolae in O. johansenii are occluded by an internal velum; no velum was detected in O. verleyenii. In the centre of the valve is a small central hyaline area with 1–6 carinoportulae in O. verleyenii, 2–4 in O. johansenii. A distinct ring of marginal linking spines or straight, non-linking spines are present at the valve face/mantle junction. No caverns or internal undulations are present. Internal valves have not been encountered. Both Orthoseira johansenii and O. verleyenii have valves of about the same dimensions. The two species differ in that O. verleyenii shows a rather regular striation pattern near the valve face/mantle junction is noted whereas this is not the case in O. johansenii. Moreover, O. johansenii short slits between the carinoportulae on the internal valve side are absent whereas in O. verleyenii most valves possesses these slits. The two new species are compared with others in this small (ca. 15 species) genus. The biogeographic implications of species separated by 15,000 km are discussed.

scholarly journals Two new species of rust fungi (Pucciniales) from the Brazilian Amazon: Aecidium margaritariae on Margaritaria and Uromyces amapaensis on Jatropha

2021 ◽  
Vol 51 (3) ◽  
pp. 244-249
Author(s):  
Patrícia Maria Piovezan OLIVEIRA ◽  
Helen Maria Pontes SOTÃO ◽  
Gabriely Serrão FREIRE ◽  
Josiane Santana MONTEIRO
Keyword(s):  
Electron Microscopy ◽  
Scanning Electron Microscopy ◽  
New Species ◽  
Brazilian Amazon ◽  
Rust Fungi ◽  
The State ◽  
Two New Species ◽  
Basal Portion ◽  
Jatropha Gossypiifolia ◽  
Scanning Electron

ABSTRACT Two new species of Pucciniales fungi on plants of the Fabid clade are described from samples deposited in the herbarium of Museu Paraense Emilio Goeldi, collected in the state of Amapá, in the Brazilian Amazon. They are Aecidium margaritariae found on Margaritaria nobilis (Phyllanthaceae), and Uromyces amapaensis on Jatropha gossypiifolia (Euphorbiaceae). The microstructures of the specimens were analyzed using optical and scanning electron microscopy. Aecidium margaritariae is characterized by the presence of globose, subglobose to slightly ellipsoid aeciospores with warty walls and smooth areas usually in the basal portion. Uromyces amapaensis is distinguished by the presence of uredinia with paraphyses which are thickened and rounded at the tip, and pedicellate and smooth teliospores. Descriptions, illustrations, and taxonomic comments are presented for each species.

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