Biodiversity of the Silurian osteostracans of the East Baltic

2014 ◽  
Vol 105 (2) ◽  
pp. 73-148 ◽  
Author(s):  
T. Märss ◽  
O. Afanassieva ◽  
H. Blom
Keyword(s):  
New Taxa ◽  
Thin Sections ◽  
Histological Characteristics ◽  
First Time ◽  
Drill Cores

ABSTRACTThe sculpture and histology of osteostracan head shields and trunk squamations from the Silurian of Estonia are described, illustrated and used for the identification of disarticulated microremains collected from outcrop sections and numerous drill cores in Estonia and Latvia over the last 40 years. The scattered osteostracan material contains thousands of specimens of scales and shield fragments. The sculpture and histology of species of the previously identified eight genera in the region (Tremataspis, Dartmuthia, Saaremaaspis, Oeselaspis, Aestiaspis, Thyestes, Procephalaspis, Witaaspis) are redescribed, together with Ateleaspis, found in Estonia for the first time. The sculpture on the cornua of several taxa is described for the first time. The new taxa Tremataspis perforata sp. nov., Dartmuthia procera sp. nov., Eldaaspis miklii gen. et sp. nov., Tahulaspis ordinata gen. et sp. nov., Tahulaspis praevia gen. et sp. nov., Meelaidaspis gennadii gen. et sp. nov. and Ohesaareaspis ponticulata gen. et sp. nov. are established, based upon sculpture and histological characteristics of the exoskeleton. The supraoral field with denticles of that field are described for the first time in Oeselaspis pustulata, as is the supraoral plate with buccal denticles in Meelaidaspis gennadii gen. et sp. nov. Thin sections of all taxa (except of Witaaspis) have been studied. This work sheds light on East Baltic osteostracan biodiversity from the Maasi Beds of the Jaagarahu Stage, Sheinwoodian, lower Wenlock up to the Ohesaare Stage, upper Přidoli, Silurian.

scholarly journals Observations on early fungal infections with relevance for replant disease in fine roots of the rose rootstock Rosa corymbifera 'Laxa'

2020 ◽  
Vol 10 (1) ◽  
Author(s):  
G. Grunewaldt-Stöcker ◽  
C. Popp ◽  
A. Baumann ◽  
S. Fricke ◽  
M. Menssen ◽  
...  
Keyword(s):  
Fine Roots ◽  
Woody Plant ◽  
Fine Root ◽  
Fungal Infections ◽  
Thin Sections ◽  
Replant Disease ◽  
Pot Trials ◽  
Worldwide Phenomenon ◽  
First Time ◽  
The Rose

AbstractReplant disease is a worldwide phenomenon affecting various woody plant genera and species, especially within the Rosaceae. Compared to decades of intensive studies regarding replant disease of apple (ARD), the replant disease of roses (RRD) has hardly been investigated. The etiology of RRD is also still unclear and a remedy desperately needed. In greenhouse pot trials with seedlings of the RRD-sensitive rootstock Rosa corymbifera ‘Laxa’ cultured in replant disease affected soils from two different locations, early RRD symptom development was studied in fine roots. In microscopic analyses we found similarities to ARD symptoms with regards to structural damages, impairment in the root hair status, and necroses and blackening in the cortex tissue. Examinations of both whole mounts and thin sections of fine root segments revealed frequent conspicuous fungal infections in association with the cellular disorders. Particularly striking were fungal intracellular structures with pathogenic characteristics that are described for the first time. Isolated fungi from these tissue areas were identified by means of ITS primers, and many of them were members of the Nectriaceae. In a next step, 35 of these isolates were subjected to a multi-locus sequence analysis and the results revealed that several genera and species were involved in the development of RRD within a single rose plant. Inoculations with selected single isolates (Rugonectria rugulosa and Ilyonectria robusta) in a Perlite assay confirmed their pathogenic relationship to early necrotic host plant reactions, and symptoms were similar to those exhibited in ARD.

Bronze Age Cremation Cemeteries in the East Midlands

1987 ◽  
Vol 53 (1) ◽  
pp. 187-221 ◽  
Author(s):  
Carol S. M. Allen ◽  
Mary Harman ◽  
Hazel Wheeler
Keyword(s):  
Bronze Age ◽  
Direct Relationship ◽  
Small Cluster ◽  
Linear Arrangement ◽  
Thin Sections ◽  
Probable Function ◽  
East Midlands ◽  
Materials Used ◽  
First Time ◽  
Organic Remains

Two Bronze Age cremation cemeteries excavated between 1968 and 1975 are reported and discussed. At Coneygre Farm, Notts., fifty-one cremations were excavated, thirty-one in pots, six in cists, and fourteen uncontained. Cremations were deposited in a roughly linear arrangement and no barrow was found. At Pasture Lodge Farm, Lincs., twenty-seven pots were found, of which twenty-five had associated cremations, and fifteen further sherds could represent burials. Vessels in this cemetery form a small cluster. Pottery from these two cemeteries is broadly similar to Deverel-Rimbury ware and with vessels from other sites in the region is considered to form an East Midlands group of Bronze Age pottery. Vessels of this type from Frieston and Grantham, Lincs., are illustrated for the first time. Examination of thin sections of the pottery from the two cemeteries suggests that most, although not all, of the materials used could have been found locally. Organic remains found in thin sections provide environmental information. The effect of soils on durability of pots and their probable function is discussed. A direct relationship is noticed for the first time between the age of the cremated individual and the capacity of the pot in which the cremation was deposited.

New taxa and new records of butterflies from Vietnam (Lepidoptera, Papilionoidea) 

Zootaxa ◽  
2021 ◽  
Vol 5048 (4) ◽  
pp. 486-510
Author(s):  
ALEXANDER L. MONASTYRSKII ◽  
VU VAN LIEN
Keyword(s):  
New Species ◽  
New Taxa ◽  
New Records ◽  
Species Level ◽  
New Subspecies ◽  
The Status ◽  
First Time ◽  
A New Species

A new species and eight new subspecies of Papilionoidea discovered in Vietnam between 2002 and 2020 are described and illustrated. The status of two taxa are revised. New taxa include Pieridae: Delias sanaca bidoupa Monastyrskii & Vu subspec. nov. and Talbotia naganum aurelia Monastyrskii & Vu subspec. nov.; Nymphalidae: Abrota ganga pulcheria Monastyrskii & Vu, subspec. nov.; Bassarona recta consonensis Monastyrskii & Vu, subspec. nov.; Pantoporia bieti aurantina Monastyrskii & To subspec. nov.; Ragadia latifasciata cristata Monastyrskii & Vu, subspec. nov.; Ragadia latifasciata crystallina Monastyrskii & Vu, subspec. nov.; Faunis indistincta luctus Monastyrskii & Vu subspec. nov. & Aemona gialaica Monastyrskii, K. Saito & Vu, spec. nov. The taxon infuscata Devyatkin & Monastyrskii, previously described as the subspecies Aemona tonkinensis infuscata, was elevated to the species level, while the taxon critias (Ragadia critias Riley & Godfrey) was reduced to a subspecies. Three Satyrinae species were recorded from Vietnam for the first time: Palaeonympha opalina Butler, 1871; Ypthima motschulskyi Bremer & Grey, 1853; and Ragadia latifasciata Leech, 1891.  

scholarly journals Plantae uxpanapae II. Novedades en Violaceae y Scrophulariaceae

2017 ◽  
pp. 133
Author(s):  
Tom Wendt
Keyword(s):  
New Taxa ◽  
New Records ◽  
New Variety ◽  
First Time

New taxa and new records for México in Violaceae and Scrophulariaceae are presented , based on collections from the Zona de Uxpanapa, Veracruz-Oaxaca. Rinorea uxpanapana (Violaceae) is described as new, and R. deflexiflora is reported for the first time from México. In Scrophulariaceae, Uroskinnera hirtiflora var. breviloba is a new variety, and the asiatic weed Lindernia antipoda is new to México.

Description of Almafuerte, a new genus of ground spiders from South America (Araneae, Gnaphosidae)

Zootaxa ◽  
2017 ◽  
Vol 4338 (2) ◽  
pp. 263 ◽  
Author(s):  
CRISTIAN J. GRISMADO ◽  
NICOLÁS LÓPEZ CARRIÓN
Keyword(s):  
South America ◽  
New Taxa ◽  
Type Species ◽  
New Genus ◽  
Santa Fe ◽  
Southern South America ◽  
Central Argentina ◽  
First Time

A new genus of gnaphosid spiders, Almafuerte, gen. nov., is described for seven species from Southern South America. The new genus is diagnosed by a conspicuous retrolateral tegular projection on the male palp, and by having three teeth on the cheliceral retromargin. It comprises six species from Argentina, A. peripampasica sp. nov. (type species), from Central Argentina, also present in Uruguay, A. kuru sp. nov., from Santiago del Estero, A. vigorosa sp. nov., from Corrientes, A. goloboffi sp. nov., from Salta and Jujuy, A. remota sp. nov., from Santiago del Estero and Mendoza, and A. giaii (Gerschman & Schiapelli) comb. nov., here transferred from Echemus, from Santa Fe (the female is here described by the first time); and one species from Bolivia, A. facon sp. nov., from Cochabamba. Hypotheses of relationships of the new taxa are briefly discussed, in the context of the previously proposed groupings: the subfamilies Echeminae and Drassodinae (sensu Platnick 1990) and the “Echemus group” (sensu Murphy 2007). 

New species of Neotropical Plecia Wiedemann (Diptera: Bibionidae) and delineation of the americana-, nigra-, and xyele- species-groups

Zootaxa ◽  
2021 ◽  
Vol 5005 (1) ◽  
pp. 21-40
Author(s):  
SCOTT J. FITZGERALD
Keyword(s):  
New Species ◽  
El Salvador ◽  
New Taxa ◽  
Group 13 ◽  
Neotropical Species ◽  
Species Groups ◽  
Group 2 ◽  
First Time

Four new Neotropical species of Plecia Wiedemann (Diptera: Bibionidae) are described: P. abruptavena sp. n. (Colombia), P. elsalvadorensis sp. n. (El Salvador), P. nessiae sp. n. (Brazil), and P. schusteri sp. n. (Guatemala). Additionally, P. marginata Edwards is redescribed and the male described for the first time. A discussion of Neotropical species-groups is given and three species-groups based on male terminalia are outlined to include the new taxa: the americana-group (7 species), nigra-group (13 species), and xyele-group (2 species).

scholarly journals Wenlock and Pridoli (Silurian) crinoids from Saaremaa, western Estonia (Phylum Echinodermata)

2015 ◽  
Vol 89 (1) ◽  
pp. 72-81 ◽  
Author(s):  
William I. Ausich ◽  
Mark A. Wilson ◽  
Olev Vinn
Keyword(s):  
New Taxa ◽  
Type Species ◽  
New Genus ◽  
Taxonomic Revision ◽  
Species Level ◽  
New Genus And Species ◽  
Glacial Sediments ◽  
First Time

AbstractStudy of new collections of the Wenlock and Pridoli, Silurian, crinoids from Saaremaa, western Estonia, result in taxonomic revision, expanded ranges, and new taxa. Eucalyptocrinites regularis and Periechocrinus laevis are recognized outside of Sweden for the first time. Desmidocrinus laevigatus Ausich et al., 2012 is reassigned to Methabocrinus. Because the type species of Methabocrinus was previously known only from glacial sediments, the age and provenance of this genus are constrained for the first time. A new crotalocrinitid, Velocrinus coniculus new genus and species, is described. Although the Pridoli faunas of western Estonia contain only twelve species-level taxa assigned to nine genera, this fauna is one of the four richest Pridoli faunas known.

A checklist of freshwater algae from Mt. Sinbul alpine wetlands in South Korea

Nova Hedwigia ◽  
2020 ◽  
Vol 111 (1) ◽  
pp. 1-38
Author(s):  
Han Soon Kim ◽  
Jae Hak Lee ◽  
Jin Hee Kim
Keyword(s):  
South Korea ◽  
New Taxa ◽  
Late Spring ◽  
Freshwater Algae ◽  
Algal Communities ◽  
Species Numbers ◽  
Algal Diversity ◽  
Number Of Species ◽  
Algal Groups ◽  
First Time

The present study summarized the freshwater algal diversity from Mt. Sinbul alpine wetlands in South Korea from March 2013 to December 2019. We identified a total of 183 taxa belong to seven main algal groups (Charophyta, Chlorophyta, Cyanophyta, Chrysophyta, Cryptophyta, Dinophyta and Euglenophyta). The algal communities were characterized by high species numbers of the desmids making up 108 taxa. It was examined that the number of species was higher during late spring and summer. Among them, a total of 53 taxa of 40 desmid species (Charophyta) including 4 new taxa (Actinotaenium crassiusculum var. minutum var. nov., Cosmarium vitiosum var. koreanum var. nov., Groenbladia neglecta var. longa var. nov., Staurodesmus koreanus sp. nov.), 5 species of Chlorophyta, 7 species of Chrysophyta and 1 species of Cyanophyta have been recorded for the first time in Korea.

scholarly journals Synopsis and typification of the names published by Antonio Bertoloni in Florula Guatimalensis and in preceding publications

Phytotaxa ◽  
2019 ◽  
Vol 420 (3) ◽  
pp. 199-223
Author(s):  
RICCARDO M. BALDINI ◽  
ANA LUCRECIA MACVEAN ◽  
GIOVANNI CRISTOFOLINI ◽  
THOMAS F. DANIEL ◽  
ANNALISA MANAGLIA ◽  
...  
Keyword(s):  
New Taxa ◽  
Original Material ◽  
New Combinations ◽  
Original Publication ◽  
First Time ◽  
Original Drawings

Bertoloni published Florula guatimalensis in 1840, which is commonly cited as the original publication. However, our findings show that previous publications of Alessandrini of 1838 and 1840 include the original descriptions by Bertoloni which predate Florula guatimalensis. Among the 60 new taxa authored by Bertoloni, 26 were published in 1838 and 34 in 1840 by Alessandrini. Additionally, original drawings were discovered inside an old copy of Bertoloni’s Florula guatimalensis. Also a comparison between the original material from Bertoloni’s herbarium and his original drawings is here reported for the first time. The collection of Guatemalan plants studied by Antonio Bertoloni preserved at BOLO was analysed and is here discussed. The new combinations Odontonema corymbulosum and Lamourouxia barbata are proposed. A neotype for Aristolochia podocarpa and an epitype for Philadelphus myrtoides are here designated.

scholarly journals BARK ANATOMY OF LATE PERMIAN GLOSSOPTERID TREES FROM ANTARCTICA

IAWA Journal ◽  
2016 ◽  
Vol 37 (3) ◽  
pp. 444-458 ◽  
Author(s):  
Anne-Laure Decombeix ◽  
Edith L. Taylor ◽  
Thomas N. Taylor
Keyword(s):  
Late Permian ◽  
Secondary Phloem ◽  
Outer Bark ◽  
Thin Sections ◽  
Wide Range ◽  
The Matrix ◽  
Bark Tissue ◽  
Bark Anatomy ◽  
Extinct Group ◽  
First Time

The Glossopteridales are an extinct group of seed plants that dominated Gondwanan floras during the Permian. Their remains are found across a wide range of habitats and paleolatitudes, and it is particularly interesting to understand the anatomical characteristics that might have enabled such an extensive distribution. Here, we document for the first time the bark anatomy of high-latitude glossopteridalean trees using peels and thin sections made from a Late Permian trunk from Skaar Ridge, Antarctica. The bark is 3 cm thick. The secondary phloem is composed of sieve cells, axial and ray parenchyma, and fibers arranged in discontinuous unicellular tangential layers. The outer bark is a rhytidome, with numerous alternating layers of periderm and non-conducting secondary phloem showing some proliferation of the axial parenchyma. Successive periderms mostly run parallel to the cambium, with some longitudinal undulation and rare connections between two periderms. A similar anatomy was observed in bark fragments found isolated in the matrix or closely associated with large glossopterid stems or roots. The anatomy of the Skaar Ridge specimens shows that Antarctic Glossopteridales had a relatively thick, probably stringy bark. The retention of a significant amount of insulating dead bark tissue on the trunk likely provided protection of the cambium, conducting secondary phloem, and potential latent buds against biotic and abiotic environmental hazards (fire, frost, scalding, insects, etc.) and may have contributed to the extensive paleolatitudinal distribution of the Glossopteridales during the Permian.

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