Phylogenetic Position of Crenubiotus Within Macrobiotoidea (Eutardigrada) with Description of Crenubiotus Ruhesteini Sp
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The Freshwater Fish Diversity Around Mesangat Watershed, District Muara Ancalong, Regency Kutai Kartanegara, Province Kalimantan Timur
Report of: The Freshwater Fish Diversity around Mesangat watershed, District Muara Ancalong, Regency Kutai Kartanegara, Province Kalimantan Timur by: Renny Kurnia Hadiaty Mesangat ilir river Notopterus notopterus Barbichthys laevis Hemirhamphodon sp. Pangio sp. Ichthyology Laboratory, Division of Zoology, Research Center for Biology, Indonesian Institute of Sciences (LIPI) Jl. Raya Bogor-Jakarta Km 46 Cibinong 16911 2009 The Freshwater Fish Diversity around Mesangat watershed, District Muara Ancalong, Regency Kutai Kartanegara, Province Kalimantan Timur by: Renny Kurnia Hadiaty Head of Ichthyology Laboratory, Division of Zoology, Research Center for Biology, Indonesian Institute of Sciences (LIPI) Jl. Raya Bogor-Jakarta Km 46 Cibinong 16911 Email: [email protected] Introduction REA KON, The conservation section of PT REA Kaltim Plantations need to gather the aquatic fauna baseline data from the concessions area of PT REA KALTIM PLANTATION. Two survey conducted in Ulu Belayan river streams, Mahakam river drainage, District Kembang Janggut, Regency Kutai Timur, Province East Kalimantan. This third survey studied the freshwater fish diversity around Mesangat watershed, District Muara Ancalong, Regency Kutai Kartanegara, Province Kalimantan Timur. There is a quite big swampy area in the District Muara Ancalong, Mesangat swamp or in Bahasa Indonesia we call it Rawa Mesangat. This swamp area is the habitat of the protected species of long snout crocodile, Tomistoma schlegeli. The aim of this survey is to get the information of the fish diversity around Mesangat watershed, the distribution of each site and the status of the species. The results of this survey could be use as the basic data for REA KON to manage the area for the continuation and conservation of the species. -
Studies on Cyprinid Fishes of the Oriental Genus Chela Hamilton by E
Studies on Cyprinid Fishes of the Oriental Genus Chela Hamilton BY E. G. SILAS (With tlVO plates and six text-figures) CoNTENTS Page INrRODUCTION 54 HISTORICAL REsUME 54 MATERIAL AND METIiODS 55 SYNONYMS OF TIlE GENUS Chela HAMILTON 58 DEFINITION OF THE GEI\'US Chela HAMILTON 58 AFFINITIES OF THE GENUS Chela HAMll.TON 60 SUBDIVISIONS OF THE GENUS Chela HAMILTON 62 SYNOPSIS TO THE SUBGENERA AND SPECIES 64 SVSTEIo.{ATIC ACCOUNT 65 ECONOMIC IMPORTANCE 97 DISCUSSION 97 ACKNOWLEDGEMENT 98 REFERENCES 98 INTRODUCTION Recently having had occasion to consider the nomenclatorial status of certain genera and species of freshwater fishes from India, it was found that the generic status and composition of Chela, the first division named by Hamilton (1822)1 under the composite genus Cyprinus, was in con fusion. Smith (1945) made a partial attempt to straighten .the tangle, but writers seem still to adhere to earlier systems of classification, partly on account of Smith's work not being accessible as ready reference. Since 1945 some more literature has come out on the taxonomy of these fishes, and the present revision is therefore undertaken in order to help to avoid continuance of improper usage and to give an up-to-date classification of the fishes belonging to Hamilton's division Chela, which is now recognised as a distinct genus of the subfamily Abramidinae of the family Cyprinidae. HISTORICAL REsUME Under the division Chela of the genns Cyprinus, Hamilton described a heterogenons assemblage of seven species. The first named species, '1 Also cited in earlier literature as Hamilton-Buchanan. STUDIES ON CYPRINID FISHES 55 Cyprinus (Chela) each ius Hamilton was made the type of the genus Chela by Bleeker (1863, p. -
Continued Exploration of Tanzanian Rainforests Reveals a New Echiniscid Species (Heterotardigrada)
Zoological Studies 59:18 (2020) doi:10.6620/ZS.2020.59-18 Open Access Continued Exploration of Tanzanian Rainforests Reveals a New Echiniscid Species (Heterotardigrada) Marcin Bochnak1, Katarzyna Vončina1, Reinhardt M. Kristensen2,§, and Piotr Gąsiorek1,§* 1Institute of Zoology and Biomedical Research, Jagiellonian University, Gronostajowa 9, 30-387 Kraków, Poland. *Correspondence: E-mail: [email protected] (Gąsiorek) E-mail: [email protected] (Bochnak); [email protected] (Vončina) 2Section for Biosystematics, Natural History Museum of Denmark, University of Copenhagen, Universitetsparken 15, Copenhagen Ø DK-2100, Denmark. E-mail: [email protected] (Kristensen) §RMK and PG share joint senior authorship. Received 13 January 2020 / Accepted 28 April 2020 / Published 15 June 2020 Communicated by Benny K.K. Chan The Afrotropical tardigrade fauna is insufficiently studied, and consequently its diversity in this region is severely underestimated. Ongoing sampling in the Udzungwa Mountains, Morogoro Region of Tanzania has revealed a new representative of the genus Echiniscus C.A.S. Schultze, 1840 (Echiniscidae). Echiniscus tantulus sp. nov. belongs to the spinulosus group, but it stands out from other members of this speciose Echiniscus clade by having a heteromorphic sculpture of the dorsal plates and an uncommonly stable body appendage configuration A-C-Cd-Dd-E. The new species is characteristic by being equipped with long dorsal spines and very short lateral spicules, which so far have been found only in one other species of the group, Echiniscus spinulosus (Doyère, 1840). An updated checklist of Tanzanian Echiniscidae is provided, incorporating recent advances in their classification. Key words: Biodiversity, Chaetotaxy, Cuticular sculpturing, The spinulosus group, Udzungwa Mountains. -
A Computational Structural Study on the DNA-Protecting Role of The
www.nature.com/scientificreports OPEN A computational structural study on the DNA‑protecting role of the tardigrade‑unique Dsup protein Marina Mínguez‑Toral 1, Bruno Cuevas‑Zuviría 1, María Garrido‑Arandia 1 & Luis F. Pacios 1,2* The remarkable ability of tardigrades to withstand a wide range of physical and chemical extremes has attracted a considerable interest in these small invertebrates, with a particular focus on the protective roles of proteins expressed during such conditions. The discovery that a tardigrade‑unique protein named Dsup (damage suppressor) protects DNA from damage produced by radiation and radicals, has raised expectations concerning its potential applications in biotechnology and medicine. We present in this paper what might be dubbed a “computational experiment” on the Dsup‑DNA system. By means of molecular modelling, calculations of electrostatic potentials and electric felds, and all-atom molecular dynamics simulations, we obtained a dynamic picture of the Dsup‑DNA interaction. Our results suggest that the protein is intrinsically disordered, which enables Dsup to adjust its structure to ft DNA shape. Strong electrostatic attractions and high protein fexibility drive the formation of a molecular aggregate in which Dsup shields DNA. While the precise mechanism of DNA protection conferred by Dsup remains to be elucidated, our study provides some molecular clues of their association that could be of interest for further investigation in this line. Te remarkable ability of tardigrades to survive environmental extremes has attracted the attention of research- ers in biology and biotechnology. Tardigrades, also known as water bears, are a specifc phylum (Tardygrada) which includes about 1,300 species found in terrestrial, freshwater and marine habitats 1–3. -
An Introduction to Phylum Tardigrada - Review
Volume V, Issue V, May 2016 IJLTEMAS ISSN 2278 – 2540 An Introduction to phylum Tardigrada - Review Yashas R Devasurmutt1, Arpitha B M1* 1: R & D Centre, Department of Biotechnology, Dayananda Sagar College of Engineering, Bangalore, India 1*: Corresponding Author: Arpitha B M Abstract: Tardigrades popularly known as water bears are In cryptobiosis (extreme form of anabiosis), the metabolism is micrometazoans with four pairs of lobopod legs. They are the undetectable and the animal is known as tun in this phase. organisms which can live in extreme conditions and are known to Tuns have been known to survive very harsh environmental survive in vacuum and space without protection. Tardigardes conditions such as immersion in helium at -272° C (-458° F) survive in lichens and mosses, usually associated with water film or heating temperatures at 149° C (300° F), exposure to very on mosses, liverworts, and lichens. More species are found in high ionizing radiation and toxic chemical substances and milder environments such as meadows, ponds and lakes. They long durations without oxygen. [4] Figure 2 illustrates the are the first known species to survive in outer space. Tardigrades process of transition of the tardigrades[41]. are closely related to Arthropoda and nematodes based on their morphological and molecular analysis. The cryptobiosis of Figure 2: Transition process of Tardigrades Tardigrades have helped scientists to develop dry vaccines. They have been applied as research subjects in transplantology. Future research would help in more applications of tardigrades in the field of science. Keywords: Tardigrades, cryptobiosis, dry vaccines, Transplantology, space research I. INTRODUCTION ardigrade, a group of tiny arthropod-like animals having T four pairs of stubby legs with big claws, an oval stout body with a round back and lumbering gait. -
Conference Program
WELCOME TO TARDIGRADA 2018 14TH INTERNATIONAL SYMPOSIUM ON TARDIGRADA CONFERENCE PROGRAM Symposi nal um tio o a n n Ta r r te d n i I g r h a t d 4 a 1 COPENHAGEN BIOCENTER, DENMARK www.tardigrada2018.org U N I V E R S I T Y O F C O P E N H A G E N FACULTY OF SCIENCE WELCOME 14th International Symposium on Tardigrada Welcome to Tardigrada 2018 International tardigrade symposia take place every three years and represent the greatest scientific forum on tardigrades. We are pleased to welcome you to Copenhagen and the 14th International Symposium on Tardigrada and it is with pleasure that we announce a new record in the number of participants with 28 countries represented at Tardigrada 2018. During the meeting 131 abstracts will be presented. The electronic abstract book is available for download from the Symposium website - www.tardigrada2018.org - and will be given to conference attendees on a USB stick during registration. Organising Committee 14th International Tardigrade Symposium, Copenhagen 2018 Chair Nadja Møbjerg (University of Copenhagen, Denmark) Local Committee Hans Ramløv (Roskilde University, Denmark), Jesper Guldberg Hansen (University of Copenhagen, Denmark), Jette Eibye-Jacobsen (University of Copenhagen, Denmark/ Birkerød Gymnasium), Lykke Keldsted Bøgsted Hvidepil (University of Copenhagen, Denmark), Maria Kamilari (University of Copenhagen, Denmark), Reinhardt Møbjerg Kristensen (University of Copenhagen, Denmark), Thomas L. Sørensen-Hygum (University of Copenhagen, Denmark) International Committee Ingemar Jönsson (Kristianstad University, Sweden), Łukasz Kaczmarek (A. Mickiewicz University, Poland) Łukasz Michalczyk (Jagiellonian University, Poland), Lorena Rebecchi (University of Modena and Reggio Emilia, Italy), Ralph O. -
Tardigrade Reproduction and Food
Glime, J. M. 2017. Tardigrade Reproduction and Food. Chapt. 5-2. In: Glime, J. M. Bryophyte Ecology. Volume 2. Bryological 5-2-1 Interaction. Ebook sponsored by Michigan Technological University and the International Association of Bryologists. Last updated 18 July 2020 and available at <http://digitalcommons.mtu.edu/bryophyte-ecology2/>. CHAPTER 5-2 TARDIGRADE REPRODUCTION AND FOOD TABLE OF CONTENTS Life Cycle and Reproductive Strategies .............................................................................................................. 5-2-2 Reproductive Strategies and Habitat ............................................................................................................ 5-2-3 Eggs ............................................................................................................................................................. 5-2-3 Molting ......................................................................................................................................................... 5-2-7 Cyclomorphosis ........................................................................................................................................... 5-2-7 Bryophytes as Food Reservoirs ........................................................................................................................... 5-2-8 Role in Food Web ...................................................................................................................................... 5-2-12 Summary .......................................................................................................................................................... -
A Checklist of Norwegian Tardigrada
Fauna norvegica 2017 Vol. 37: 25-42. A checklist of Norwegian Tardigrada Terje Meier1 Meier T. 2017. A checklist of Norwegian Tardigrada. Fauna norvegica 37: 25-42. Animals of the phylum Tardigrada are microscopical metazoans that seldom exceed 1 mm in length. They are recorded from terrestrial, limnic and marine habitats and they have a distribution from Arctic to Antarctica. Tardigrades are also named ‘water bears’ referring to their ‘walk’ that resembles a bear’s gait. Knowledge of Norwegian tardigrades is fragmented and distributed across numerous sources. Here this information is gathered and validity of some records is discussed. In total 146 different species are recorded from the Norwegian mainland and Svalbard. Among these, 121 species and subspecies are recorded in previous publications and another 25 species are recorded from Norway for the first time. doi: 10.5324/fn.v37i0.2269. Received: 2017-05-22. Accepted: 2017-12-06. Published online: 2017-12.20. ISSN: 1891-5396 (electronic). Keywords: Tardigrada, Norway, Svalbard, checklist, taxonomy, literature, biodiversity, new records 1. Prinsdalsfaret 20, NO-1262 Oslo, Norway. Corresponding author: Terje Meier E-mail: [email protected] INTRODUCTION terminating in claws or sucking disks. The first three pairs of legs are directed ventrolaterally and are used to moving over the The phylum Tardigrada (water bears) currently holds about substrate. The hind legs are directed posteriorly and are used for 1250 valid species and subspecies (Degma et al. 2007, Degma grasping. Adult Tardigrades usually range from 250 µm to 700 et al. 2017) and are found in a great variety of habitats. They µm in length. -
Tardigrade Milnesium Cf. Tardigradum at Different Stages of Development
Effects of Ionizing Radiation on Embryos of the Tardigrade Milnesium cf. tardigradum at Different Stages of Development Eliana Beltra´n-Pardo1,2, K. Ingemar Jo¨ nsson2,3*, Andrzej Wojcik2, Siamak Haghdoost2, Mats Harms- Ringdahl2, Rosa M. Bermu´ dez-Cruz4, Jaime E. Bernal Villegas1 1 Instituto de Gene´tica Humana, Pontificia Universidad Javeriana, Bogota´, Colombia, 2 Department of Molecular Biosciences, The Wenner-Gren Institute, Stockholm University, Stockholm, Sweden, 3 School of Education and Environment, Kristianstad University, Kristianstad, Sweden, 4 Departamento de Gene´tica y Biologı´a Molecular, Centro de Investigacio´n y Estudios Avanzados, CINVESTAV, Me´xico D.F, Me´xico Abstract Tardigrades represent one of the most desiccation and radiation tolerant animals on Earth, and several studies have documented their tolerance in the adult stage. Studies on tolerance during embryological stages are rare, but differential effects of desiccation and freezing on different developmental stages have been reported, as well as dose-dependent effect of gamma irradiation on tardigrade embryos. Here, we report a study evaluating the tolerance of eggs from the eutardigrade Milnesium cf. tardigradum to three doses of gamma radiation (50, 200 and 500 Gy) at the early, middle, and late stage of development. We found that embryos of the middle and late developmental stages were tolerant to all doses, while eggs in the early developmental stage were tolerant only to a dose of 50 Gy, and showed a declining survival with higher dose. We also observed a delay in development of irradiated eggs, suggesting that periods of DNA repair might have taken place after irradiation induced damage. The delay was independent of dose for eggs irradiated in the middle and late stage, possibly indicating a fixed developmental schedule for repair after induced damage. -
Distribution and Diversity of Tardigrada Along Altitudinal Gradients in the Hornsund, Spitsbergen
RESEARCH/REVIEW ARTICLE Distribution and diversity of Tardigrada along altitudinal gradients in the Hornsund, Spitsbergen (Arctic) Krzysztof Zawierucha,1 Jerzy Smykla,2,3 Łukasz Michalczyk,4 Bartłomiej Gołdyn5,6 & Łukasz Kaczmarek1,6 1 Department of Animal Taxonomy and Ecology, Faculty of Biology, Adam Mickiewicz University in Poznan´ , Umultowska 89, PL-61-614 Poznan´ , Poland 2 Department of Biodiversity, Institute of Nature Conservation, Polish Academy of Sciences, Mickiewicza 33, PL-31-120 Krako´ w, Poland 3 Present address: Department of Biology and Marine Biology, University of North Carolina, Wilmington, 601 S. College Rd., Wilmington, NC 28403, USA 4 Department of Entomology, Institute of Zoology, Jagiellonian University, Gronostajowa 9, PL-30-387 Krako´ w, Poland 5 Department of General Zoology, Faculty of Biology, A. Mickiewicz University in Poznan´ , Umultowska 89, PL-61-614 Poznan´ , Poland 6 Laboratorio de Ecologı´a Natural y Aplicada de Invertebrados, Universidad Estatal Amazo´ nica, Puyo, Ecuador Keywords Abstract Arctic; biodiversity; climate change; invertebrate ecology; Milnesium; Two transects were established and sampled along altitudinal gradients on the Tardigrada. slopes of Ariekammen (77801?N; 15831?E) and Rotjesfjellet (77800?N; 15822?E) in Hornsund, Spitsbergen. In total 59 moss, lichen, liverwort and mixed mossÁ Correspondence lichen samples were collected and 33 tardigrade species of Hetero- and Krzysztof Zawierucha, Department of Eutardigrada were found. The a diversity ranged from 1 to 8 per sample; the Animal Taxonomy and Ecology, Faculty of estimated number of species based on all analysed samples was 52917 for the Biology, Adam Mickiewicz University in Chao 2 estimator and 41 for the incidence-based coverage estimator. -
Phylum Tardigrada Doyère, 1840. In: Zhang, Z.-Q
Phylum Tardigrada Doyère, 1840 (3 classes)1 Class Heterotardigrada Marcus, 1927 (2 orders) Order Arthrotardigrada Marcus, 1927 (8 families) Family Archechiniscidae Binda, 1978 (1 genus, 3 species) Family Batillipedidae Ramazzotti, 1962 (1 genus, 26 species) Family Coronarctidae Renaud-Mornant, 1974 (2 genera, 8 species) Family Halechiniscidae Thulin, 1928 (7 subfamilies, 28 genera, 88 species) Family Neoarctidae de Zio Grimaldi, D'Addabbo Gallo & Morone De Lucia, 1992 (1 genus, 1 species) Family Neostygarctidae de Zio Grimaldi, D’Addabbo Gallo & De Lucia Morone, 1987 (1 genus, 1 species) Family Renaudarctidae Kristensen & Higgins, 1984 (1 genus, 1 species) Family Stygarctidae Schulz, 1951 (2 subfamilies, 4 genera, 21 species) Order Echiniscoidea Richters, 1926 (4 families) Family Echiniscoididae Kristensen & Hallas, 1980 (2 genera, 11 species) Family Carphaniidae Binda & Kristensen, 1986 (1 genus, 1 species) Family Oreellidae Ramazzotti, 1962 (1 genus, 2 species) Family Echiniscidae Thulin, 1928 (12 genera, 281 species) Class Mesotardigrada Rahm, 1937 (1 order)2 Order Thermozodia Ramazzotti & Maucci, 1983 (1 family) Family Thermozodiidae Rahm, 1937 (1 genus, 1 species) Class Eutardigrada Richters 1926 (2 orders) Order Apochela Schuster, Nelson, Grigarick & Christenberry, 1980 (1 family) Family Milnesiidae Ramazzotti, 1962 (3 genera, 19+1† species)3 Order Parachela Schuster, Nelson Grigarick & Christenberry, 1980 (4 superfamilies, 9 families) Family Necopinatidae Ramazzotti & Maucci, 1983 (1 genus, 1 species)4 incertae sedis (1 genus: Apodibius, -
The Effect of Dehydration Rates on Anhydrobiotic Survival and Trehalose Levels in Tardigrades Johanna Lundström &Linda Svensson
Tsunami 2006-3 The effect of dehydration rates on anhydrobiotic survival and trehalose levels in tardigrades Johanna Lundström &Linda Svensson The effect of dehydration rates on anhydrobiotic survival and trehalose levels in tardigrades Johanna Lundström Linda Svensson Examensarbete i biologi, 20 poäng Biologi- och Geovetenskapsprogrammet Institutionen för Matematik och Naturvetenskap Högskolan Kristianstad Kristianstad 2006 Institutionen för matematik och naturvetenskap Dept. of Mathematics and Science Högskolan Kristianstad Kristianstad University 291 88 Kristianstad SE-291 88 Kristianstad Sweden Tsunami 2006-3 The effect of dehydration rates on anhydrobiotic survival and trehalose levels in tardigrades Johanna Lundström &Linda Svensson The paradox of life without water, summarized by Crowe 1975: “If metabolism actually comes to a halt in anhydrobiotic tardigrades, we are forced into a seemingly insoluble dilemma about the nature of life; if life is defined in terms of metabolism, anhydrobiotic tardigrades must be ‘dead’, returning to ‘life’ when appropriate conditions are restored. But we know that some of the organisms die while in anhydrobiotic state, in the sense that they do not revive when conditions appropriate for life are restored. Does this mean that they ‘died’ while they were ‘dead’?” 1 Tsunami 2006-3 The effect of dehydration rates on anhydrobiotic survival and trehalose levels in tardigrades Johanna Lundström &Linda Svensson Handledare/supervisor: Ola Persson - Universitetslektor i kemi K. Ingemar Jönsson - Docent i teoretisk ekologi Examinator/examiner: Johan Elmberg - Professor i zooekologi Författare/authors: Johanna Lundström Linda Svensson Svensk titel: Uttorkningshastighetens påverkan på anhydrobiotisk överlevnad och trehaloshalt hos tardigrader. English title: The effect of dehydration rates on anhydrobiotic survival and trehalose levels in tardigrades.