Aescht Erna

Aescht Erna
  • Doctor of Philosophy
  • Independent Researcher

About

90
Publications
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1,109
Citations
Current institution
Independent Researcher

Publications

Publications (90)
Article
Full-text available
Thirteen examples mainly taken from ciliatology illustrate the increasing work load of serious taxonomists interested in the reliability of nomenclatural information and trying to be Code-compliant. Weaknesses of the “Amendment” of five articles to expand methods of publication of the Code resulted in the increasing vagueness of dating a nomen (and...
Article
Full-text available
Modern advances in DNA sequencing hold the promise of facilitating descriptions of new organisms at ever finer precision but have come with challenges as the major Codes of bionomenclature contain poorly defined requirements for species and subspecies diagnoses (henceforth, species diagnoses), which is particularly problematic for DNA-based taxonom...
Article
This sixth report of activities of the Linz Zoocode Committee is devoted to the result of the enquiry launched by this Committee in 2021 about the status of new nomina and nomenclatural acts published so far on CD-ROMs. After a discussion of some problems of interpretation raised by Articles 8.4.2, 8.1.2 and 9.12 of the Code, we provide information...
Article
This fourth report of activities of the Linz Zoocode Committee is devoted to a detailed survey of the problems raised by the current Rules of the Code regarding the nomenclatural availability of works published on paper, concerning their dates, material and administrative parameters of publication, and various other matters. It proposes a few chang...
Article
Full-text available
This fifth report of activities of the Linz Zoocode Committee is devoted to a detailed survey of the problems raised by the current Rules of the Code, published in 2012, regarding the nomenclatural availability of works published online and registered on the database Zoobank. It points to various deficiencies in these Rules and in the conception an...
Article
This fourth report of activities of the Linz Zoocode Committee is devoted to a detailed survey of the problems raised by the current Rules of the Code regarding the nomenclatural availability of works published on paper, concerning their dates, material and administrative parameters of publication, and various other matters. It proposes a few chang...
Article
This third report of activities of the Linz Zoocode Committee provides comments and proposals regarding the concepts, terminology and Rules used to establish the nomenclatural availability of publications, whatever their support and mode of distribution (on paper, on discs or electronic).
Article
According to the Code currently in force, taxonomic works presenting nomenclatural novelties published on optical discs may be nomenclaturally available only if published between 1985 and 2013, and respecting some conditions allowing their nomenclatural promulgation. These works will remain accessible to readers only as long as the technologies all...
Article
According to the Code currently in force, taxonomic works presenting nomenclatural novelties published on optical discs may be nomenclaturally available only if published between 1985 and 2013, and respecting some conditions allowing their nomenclatural promulgation. These works will remain accessible to readers only as long as the technologies all...
Article
According to the Code currently in force, taxonomic works presenting nomenclatural novelties published on optical discs may be nomenclaturally available only if published between 1985 and 2013, and respecting some conditions allowing their nomenclatural promulgation. These works will remain accessible to readers only as long as the technologies all...
Article
Full-text available
In July 2014, the international meeting ‘Burning questions and problems of zoological nomenclature’ was held in Linz (Austria). It acknowledged the presence in the current International Code of Zoological Nomenclature of a number of severe problems, and accordingly decided the creation of a new international body, the Linz Zoocode Committee (LZC),...
Article
Sessions 15–38 of the Linz Zoocode Committee (May 2017 – October 2019). 1–2 LZC Session 15. Preamble of the Zoocode: purposes and functions. 3–5 LZC Session 16. What is the meaning of ‘fixed content and layout’ in Article 8.1.3.2 of the 2012 Amendment of the Code? Consequences regarding this Amendment. 6–34 LZC Session 17. The Principles of the Zoo...
Chapter
Full-text available
Austria takes a special status in the international research on ciliates. Wilhelm Foissner, one of the most experienced and productive taxonomists, and his working group made Austria to a hotspot of ciliate-diversity research (Aescht & Berger 2008a, b, Aescht 2008, Berger & Al-Rasheid 2008). In addition, a natural monument (“Krauthügel”) expressly...
Article
Full-text available
Recent advances in molecular technology have revolutionized research on allaspects of the biology of organisms, including ciliates, and created unprecedented opportunities for pursuing a more integrative approach to investigationsof biodiversity. However, this goal is complicated by large gaps and inconsistencies that still exist in the foundation...
Article
Full-text available
Recent advances in molecular technology have revolutionized research on all aspects of the biology of organisms, including ciliates, and created unprecedented opportunities for pursuing a more integrative approach to investigation of biodiversity. However, this goal is complicated by large gaps and inconsistencies that still exist in the foundation...
Article
Full-text available
The question whether taxonomic descriptions naming new animal species without type specimen(s) deposited in collections should be accepted for publication by scientific journals and allowed by the Code has already been discussed in Zootaxa (Dubois & Nemésio 2007; Donegan 2008, 2009; Nemésio 2009a–b; Dubois 2009; Gentile & Snell 2009; Minelli 2009;...
Data
This plot is not part of the published stance but derives from it. The plot shows the number of authors by geographic region (courtesy of Dr. Diego Astua).
Article
Full-text available
This paper reports about the international meeting on zoological nomenclature held in Linz (Austria) in July 2014, and which resulted in the foundation of the Linz Zoocode Committee.
Article
This paper reports about the composition, purposes and general functioning of the Linz Zoocode Committee established in Linz (Austria) in July 2014.
Article
This series of papers report in details about the work and decisions of the Linz Zoocode Committee (LZC) in its Sessions 1–6: 1. Procedure proposed for the internal functioning of the LZC. 2. Nomenclatural problems with electronic publications. 3. The term nomen. 4. The structure of the Zoocode. 5. The nomenclatural process. 6. Proposal AVA-01. Obs...
Chapter
Morphologie und Systematik, vor allem jene der kleinen wirbellosen Tiere („Evertebraten“) und der einzelligen Eukaryoten („Protozoen“), sind keine abgeschlossenen Disziplinen der Zoologie, sondern höchst lebendige, forschungsbedürftige Arbeitsgebiete. Die Bestimmung (unter anderem notwendig für ökologische und phylogenetische Untersuchungen) erford...
Article
Full-text available
Since ciliates rarely possess structures that easily fossilize, we are limited in our ability to use paleontological studies to reconstruct the early evolution of this large and ecologically important clade of protists. Tintinnids, a group of loricate (house-forming) planktonic ciliates, are the only group that has a significant fossil record. Puta...
Article
Full-text available
In zoological nomenclature, to be potentially valid, nomenclatural novelties (i.e., new nomina and nomenclatural acts) need first to be made available, that is, published in works qualifying as publications as defined by the International Code of zoological Nomenclature (“the Code”). In September 2012, the Code was amended in order to allow the rec...
Article
Full-text available
Can we describe all species on Earth before they disappear? We argue that this is possible only by endowing taxonomy with professional manpower and appropriate material resources as required by big science. Contrary to Costello et al.’s (CMS) statements, taxonomy is not an easy discipline accessible to all through a smartphone. It requires exhausti...
Article
Full-text available
Can we describe all species on Earth before they disappear? We argue that this is possible only by endowing taxonomy with professional manpower and appropriate material resources as required by big science. Contrary to Costello et al.’s (CMS) statements, taxonomy is not an easy discipline accessible to all through a smartphone. It requires exhausti...
Article
Full-text available
The initiative resulting in a revived Draft BioCode (DBC) is highly welcomed, to a lesser extent the acontextual, ahistorical and disembodied presentation of the latter. Examples from ciliatology show that we not only face a taxonomic gap combined with a biodiversity crisis but also a “nomenclature awareness” gap. Because of many discrepancies betw...
Chapter
Morphologie und Systematik, vor allem jene der kleinen wirbellosen Tiere („Evertebraten“) und der einzelligen Eukaryoten („Protozoen“), sind keine abgeschlossenen Disziplinen der Zoologie, sondern höchst lebendige, forschungsbedürftige Arbeitsgebiete. Die Bestimmung (unter anderem notwendig für ökologische und phylogenetische Untersuchungen) erford...
Article
Full-text available
New zoological records in Upper Austria (1993–2002). 691 animals have been recorded in Upper Austria for the first time in the last ten years. 258 records refer to protozoa, 240 to diverse invertebrates, viz. sponges, annelids, bryozoans, molluscs, crustaceans, and arachnids, 174 to insects, and 19 to vertebrates. Beside the species name, the origi...
Article
Full-text available
Cortical development during cell division of Blepharisma americanum Suzuki, 1954, B. undulans Stein, 1867, and B. hyalinum Perty, 1849 was investigated using protargol impregnation and scanning electron microscopy. Stomatogenesis usually commences in a postoral kinety. Depending on species, 0-3 neighbouring kineties are involved in the anarchic fie...
Article
The ciliated protozoa occurring in two sewage treatment plants (Ästen near Linz and Offenhausen near Wels, Upper Austria) were investigated by means of life observation, protargol impregnation and morphometrical analysis. Fifty taxa have been found, six of them are new for the activated sludge. From the sewage treatment plant Ästen near Linz seven...
Chapter
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Large branchiopods in the collection "Evertebrata varia" of the OÖ. Landesmuseum (Linz, Austria) Specimens of 13 out of 16 large branchiopod species documented in Austria have been deposited in the collection "Evertebrata varia" of the OÖ. Landesmuseum (= LI). Triops cancriformis and Leptestheria dahalacensis collected in 1940 and 1948 near the vi...
Chapter
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The microfauna consists of eukaryotic, single-celled protozoans (naked and testate amoebae, flagellates, ciliates) and multicellular organisms (rotifers, tardigrades, nematodes) too small to be studied and identified without the help of a microscope.
Article
The Weighted Coenotic Index (WCI) is a single value that unifies total abundance, dominance structure, species richness and ecological weightings, e.g., habitat preferences and positions of species in the r/K continuum. Studies with simulated species assemblages have shown that ecological weightings and dominance structure are major components of t...
Article
Full-text available
Protozoa (testate amoebae, ciliates), small metazoa (rotifers, nematodes), and soil enzymes (catalase, cellulase) were investigated in a reafforested fertilized site at the alpine timberline. Side-dressings of mineral and organic fertilizers were applied alone (90 g NPK; 90, 180, 300, and 450 g dried bacterial biomass per spruce seedling) and in co...
Article
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Ultrastructural features of Grossglockneria acutaFoissner, 1980 are very similar to those known in the confamilial species, Pseudoplatyophrya nana. The somatic infraciliature corresponds to the typical colpodid dikinetid pattern. The peculiar oral apparatus is described in detail. The feeding tube contains about 17 concentric cytostomial microtubul...
Article
Es wird die morphologische und morphogenetische Variabilität des hypotrichen Ciliaten Engelmanniella mobilis (Engelmann, 1862) Foissner, 1982 untersucht. Die aus dem Boden isolierten Populationen stammen aus Österreich (Bn, Gn), der Türkei (Tn) und aus Japan (Jn). Sie bilden hinsichtlich einiger quantitativer Merkmale der Infraciliatur, der Morphol...
Article
Avestina ludwigi has been found exclusively in freshly sampled spruce forest litter, where it is often eudominant. This small, flattened ciliate may live in very acidic environments (pH 2.4) and apparently prefers comparatively dry soils. Avestina belongs to the family Hausmanniellidae (order Colpodida) and includes two species, A. acuta and A. lud...
Article
The morphogenetic pattern, freeze-fracture, transmission, and scanning electron-microscopy of interphasic cells were used to elucidate the enigmatic systematic position of Engelmanniella mobilis. Frontal, buccal, parabuccal, and marginal cirri are distinguishable during cortical development; transverse, frontoterminal (migratory), and caudal cirri...

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