DOCSLIB.ORG

(Rotifera, Eurotatoria) of Loktak Lake, Manipur, North-Eastern India

Total Page：16

File Type：pdf, Size：1020Kb

Download full-text PDF Read full-text
(Rotifera, Eurotatoria) of Loktak Lake, Manipur, North-Eastern India Tropical Ecology 50(2): 277-285, 2009 ISSN 0564-3295 © International Society for Tropical Ecology www.tropecol.com Diversity of rotifers (Rotifera, Eurotatoria) of Loktak lake, Manipur, North-eastern India B.K. SHARMA Department of Zoology, North-Eastern Hill University, Permanent Campus, Umshing, Shillong 793022, Meghalaya, India Abstract: The rotifer communities of Loktak lake (a Ramsar site), Manipur, N.E. India, contain 120 species belonging to 36 genera and 19 families and represent the richest biodiversity of Phylum Rotifera known from any aquatic ecosystem of the Indian subcontinent. Biogeographically interesting elements include one Australasian, three Oriental and seven Palaeotropical species. Cosmopolitan species (69.2%) show higher richness while Cosmotropical > Pantropical species are well represented. The rotifer fauna is characterized by notable richness of Lecanidae > Lepadellidae > Trichocercidae > Brachionidae, general ‘tropical character’, occurrence of several acidophilic species, and a paucity of Brachionus spp. The richness (47-79; mean + SD 57±10 species) follows multimodal pattern of monthly variations with a peak during winter. The rotifer communities have 52.3-80.6% temporal similarity, and show lack of seasonal periodicity of occurrence of different families. The Rotifera form an important quantitative component of zooplankton (45.8 ± 8.1%), and have higher species diversity, lower dominance and higher evenness. Richness and density are inversely correlated with water, temperature, rainfall, hardness, nitrate, chloride and total dissolved solids and positively correlated with dissolved oxygen. In addition, richness is inversely correlated with pH. Resumen: Las comunidades de rotíferos del lago Loktak (un sitio Ramsar), Manipur, NE de la India, contienen 120 especies pertenecientes a 36 géneros y 19 familias, y representan la biodiversidad más rica del Phylum Rotifera conocida de cualquier ecosistema acuático del subcontinente indio. Los elementos biogeográficamente interesantes incluyen una especie australasiática, tres orientales y siete paleotropicales. Las especies cosmopolitas (69.2%) mostraron un mayor riqueza, mientras que las especies cosmotropicales > pantropicales están bien representadas. La fauna de rotíferos está caracterizada por una riqueza notable de Lecanidae > Lepadellidae > Trichocercidae > Brachionidae, un ‘carácter tropical’ general, la presencia de varias especies acidófilas, y una escasez de Brachionus spp. La riqueza (47-79; media + DE 57 ± 10 especies) sigue un patrón multimodal de variaciones mensuales con un pico durante el invierno. Las comunidades de rotíferos tienen una similitud temporal de 52.3 a 80.6 % y no muestran una periodicidad estacional en la presencia de diferentes familias. Los Rotifera forman un componente cuantitativo importante del zooplancton (45.8 ± 8.1%) y tienen una diversidad de especies mayor, una dominancia menor y una mayor equitatividad. La riqueza y la densidad están inversamente correlacionadas con la temperatura del agua, la precipitación, la dureza, el nitrato, el cloruro y el total de sólidos disueltos, y correlacionadas positivamente con el oxígeno disuelto. Además, la riqueza está correlacionada inversamente con el pH. Resumo: A comunidade de rotíferos do lago Loktak (uma estação Ramsar), Manipur, N.E. da índia, contem 120 espécies pertencentes a 36 géneros e 19 famílias e representam a mais rica biodiversidade do filo Rotifera conhecida em qualquer ecossistema aquático no subcontinente indiano. Os elementos biogeograficamente interessantes incluem uma espécie da * Corresponding Author; e-mail: [email protected]; [email protected] 278 ROTIFERA DIVERSITY OF LOKTAK Australásia, três Orientais e sete Paleotropicais. As espécies cosmopolitas (69,2%) mostraram a riqueza mais elevada, enquanto as espécies Cosmotropicais > Pantropicais estão bem representadas. A fauna rotífera está caracterizada por uma riqueza notável de Lecanidae > Lepadellidae > Trichocercidae > Brachionidae, espécies tropicais de carácter geral, ocorrência de várias espécies acidófilas, e uma pobreza de Brachionus spp. A riqueza específica (47-79; média ± SD 57±10) segue um padrão multimodal de variação mensal com um pico durante o inverno. As comunidades de rotíferos têm uma semelhança temporal de 52,3-80,6%, e mostram uma falta de periodicidade sazonal quanto à ocorrência das diferentes famílias. Os rotíferos formam uma importante componente quantitativa do zooplâncton (45,8±8,1%), e têm a mais alta diversidade específica, mais baixa dominância e maior equitabilidade. Riqueza e densidade estão inversamente correlacionadas com a temperatura da água, queda pluviométrica, dureza, nitratos, cloretos e sólidos totais dissolvidos e positivamente correlacionados com o oxigénio dissolvido. Adicionalmente, a riqueza está inversamente correlacionada com o pH. Key words: Abundance, biodiversity, dominance, ecology, evenness, Ramsar site, Rotifera, species diversity. Introduction Phylum Rotifera, an important group of the littoral and limnetic micro-invertebrates, in particular. Rotifera, an integral and important component I conducted an investigation of the biodiversity of aquatic food-webs, have been documented from of Rotifera of Loktak Lake with special reference a wide variety of inland aquatic biotopes of India to their nature and composition and biogeog- for more than a century, but there is currently raphically interesting elements. In addition, limited information on their diversity in the Indian observations were made on temporal variations in floodplain lakes in general (Sharma & Sharma species richness and abundance of the rotifers at a 2005a, 2008). The studies on their diversity in selected sampling site. “Ramsar sites”, or wetlands of international importance for conservation under the Ramsar Material and methods convention, of this country are restricted to Deepor beel (Sharma & Sharma 2005b), one of the largest The present study is a part of limnological floodplain wetlands in the Brahmaputra basin of survey undertaken (during November, 2002 - lower Assam (N. E. India). October, 2003) in Loktak Lake (Longitude: 930 46' - The rotifer communities of Loktak Lake - a 93º 55' E, latitude: 24º 25' – 24º 42' N; area: 286 Ramsar site, an important floodplain wetland of km2; max. depth: 4.58 m, mean depth: 2.07 m; South Asia, and one of the largest natural altitude: 768.5 m ASL) located in Bishnupur / freshwater lakes of eastern India, therefore, has Imphal districts of Manipur (N. E. India). This special biodiversity and ecological significance. wetland is characterized by floating mats of This interesting floodplain lake has great biogenic, vegetation called “Phumdi” which are inhabited by ecological and socio-economic importance and is an endangered brow-antlered deer (Cervus eldi under severe environmental stress (Tombi Singh & eldi). The common aquatic plants of this floodplain Shyamananda Singh 1994) because of human lake include Eichhornia crassipes, Hydrilla encroachment for agriculture and settlement, verticellata, Euryale ferox, Vallisnaria spiralis, influx of waste waters, and serious habitat Utricularia flexuosa, Trapa natans, Lemna trisula, degradation. Attempts are being initiated for its Pistia striates, Salvinia sp. Nymphaea spp., management and biodiversity conservation. Nymphoides spp., Nelumbo nucifera, Potamageton Ironically, so far very little is known about the spp. and Azolla pinnata. micro-faunal diversity and ecology of this Qualitative plankton samples were collected biodiversity ‘hot-spot’ in general and that of seasonally from different parts of Loktak basin SHARMA 279 (during November, 2002 - October, 2003) by towing (Iyi-Efi lake) in the Niger delta (Segers et al. 1993) a nylobolt plankton net (Mesh size: 50 μm). In and, 130 species from Lake Guarana, Brazil addition, water samples and qualitative (by (Bonecker et al. 1994). It also compares well with towing) and quantitative (by filtering 25 l of water) 114 taxa examined from Rio Pilcomayo National plankton samples were collected at regular park (a Ramsar site), Formosa, Argentina (Jose de monthly intervals, during the stated study period, Paggi 2001). at one sampling site at Sendra (Longitude: 93º 47' 45.61'' E, latitude: 24º 30' 56.75'' N). All the Table 1. Results of the abiotic factors of Loktak plankton samples were preserved in 5% formalin. lake (Nov. 2002 – Oct. 2003). Water samples were analyzed for various Abiotic factors Range Mean ± SD abiotic factors following standard methods (APHA Air temperature (ºC) 16.4-30.8 23.4 ± 4.1 1992) while water temperature, specific Water temperature (ºC) 14.5-28.5 21.4 ± 4.0 conductivity, pH and dissolved oxygen (DO) were Rainfall (mm) 0-370.4 112.1 ±1 16.8 recorded with field probes. Qualitative plankton pH 6.01-6.74 6.38 ± 0.23 samples were screened for rotifer species and Specific conductivity (µs cm–1) 75.0-132.0 98.9 ± 19.7 quantitative collections were analyzed for their Dissolved Oxygen (mg l–1) 4.6-9.0 6.2 ± 1.1 –1 abundance. Species were identified following Free CO2 (mg l ) 6.0-13.0 9.5 ± 2.1 Kutikova (1970), Koste (1978), Segers (1995), Alkalinity (mg l–1) 10.0-25.0 16.0 ± 4.4 –1 Sharma (1998) and Sharma & Sharma (1999, Hardness (mg l ) 24.0-54.0 38.1 ± 8.2 –1 2000). Segers (2002) is followed for the recent Calcium (mg l ) 5.4-15.7 8.9 ± 3.0 –1 system of nomenclature of Rotifera and remarks Magnesium (mg l ) 2.0-6.4 4.3 ± 1.9 Sodium (mg l–1) 0.6-7.4 4.7 ± 2.3 on the distribution are made using Segers (2007). –1 Community similarities
Load more

Recommended publications
  • Paper Received: 28.11.2019 Revised Received: 11.12.2019 Accepted: 12.12.2019
    Journal Home page : www.jeb.co.in « E-mail : [email protected] Review Article Journal of Environmental Biology TM p-ISSN: 0254-8704 e-ISSN: 2394-0379 JEB CODEN: JEBIDP DOI : http://doi.org/10.22438/jeb/41/1/MRN-1344 White Smoke Plagiarism Detector Just write. Review on the ecology and taxonomy of sessile rotifers (Rotifera) with special reference to Mexico S.S.S. Sarma1*, M.A. Jiménez-Santos2, S. Nandini1 and R.L. Wallace3 1Laboratory of Aquatic Zoology, National Autonomous University of Mexico, CP-54090 Tlalnepantla, México 2Posgrado en Ciencias del Mar y Limnología, Universidad Nacional Autónoma de México, CP-04510, Mexico 3Department of Biology, Ripon College, Ripon, WI 54971-0248, USA *Corresponding Author Email : [email protected] Paper received: 28.11.2019 Revised received: 11.12.2019 Accepted: 12.12.2019 Abstract Although comprising <0.5% of all the known species of Rotifera, sessile rotifers are an important component in freshwater ecosystems, especially shallow waterbodies. During the last eight decades, fewer than 80 publications have dealt specifically with sessile rotifers, while more than 7600 articles have focused on rotifers in general. In this work research on the sessile rotifers with emphasis on the Mexican fauna has been reviewed and some additional information on the new records has been included. Difficulties involved in collection and maintenance of sessile rotifers, as well as problems of identification and quantification have been considered. Published data on the ecology and taxonomy of this group has also been reviewed. There are 35 species of sessile rotifers from three families Atrochidae, Collothecidae, and Flosculariidae, but to that four more species in the planktonic family Conochilidae may be added, as recent molecular research indicates that this family lies within Flosculariidae.
    [Show full text]
  • Old Woman Creek National Estuarine Research Reserve Management Plan 2011-2016
    Old Woman Creek National Estuarine Research Reserve Management Plan 2011-2016 April 1981 Revised, May 1982 2nd revision, April 1983 3rd revision, December 1999 4th revision, May 2011 Prepared for U.S. Department of Commerce Ohio Department of Natural Resources National Oceanic and Atmospheric Administration Division of Wildlife Office of Ocean and Coastal Resource Management 2045 Morse Road, Bldg. G Estuarine Reserves Division Columbus, Ohio 1305 East West Highway 43229-6693 Silver Spring, MD 20910 This management plan has been developed in accordance with NOAA regulations, including all provisions for public involvement. It is consistent with the congressional intent of Section 315 of the Coastal Zone Management Act of 1972, as amended, and the provisions of the Ohio Coastal Management Program. OWC NERR Management Plan, 2011 - 2016 Acknowledgements This management plan was prepared by the staff and Advisory Council of the Old Woman Creek National Estuarine Research Reserve (OWC NERR), in collaboration with the Ohio Department of Natural Resources-Division of Wildlife. Participants in the planning process included: Manager, Frank Lopez; Research Coordinator, Dr. David Klarer; Coastal Training Program Coordinator, Heather Elmer; Education Coordinator, Ann Keefe; Education Specialist Phoebe Van Zoest; and Office Assistant, Gloria Pasterak. Other Reserve staff including Dick Boyer and Marje Bernhardt contributed their expertise to numerous planning meetings. The Reserve is grateful for the input and recommendations provided by members of the Old Woman Creek NERR Advisory Council. The Reserve is appreciative of the review, guidance, and council of Division of Wildlife Executive Administrator Dave Scott and the mapping expertise of Keith Lott and the late Steve Barry.
    [Show full text]
  • Gnesiotrocha, Monogononta, Rotifera) in Thale Noi Lake, Thailand
    Zootaxa 2997: 1–18 (2011) ISSN 1175-5326 (print edition) www.mapress.com/zootaxa/ Article ZOOTAXA Copyright © 2011 · Magnolia Press ISSN 1175-5334 (online edition) Diversity of sessile rotifers (Gnesiotrocha, Monogononta, Rotifera) in Thale Noi Lake, Thailand PHURIPONG MEKSUWAN1, PORNSILP PHOLPUNTHIN1 & HENDRIK SEGERS2,3 1Plankton Research Unit, Department of Biology, Faculty of Science, Prince of Songkla University, Hat Yai 90112, Songkhla, Thai- land. E-mail: [email protected], [email protected] 2Freshwater Laboratory, Royal Belgian Institute of Natural Sciences, Vautierstraat 29, 1000 Brussels, Belgium. E-mail: [email protected] 3Corresponding author Abstract In response to a clear gap in knowledge on the biodiversity of sessile Gnesiotrocha rotifers at both global as well as re- gional Southeast Asian scales, we performed a study of free-living colonial and epiphytic rotifers attached to fifteen aquat- ic plant species in Thale Noi Lake, the first Ramsar site in Thailand. We identified 44 different taxa of sessile rotifers, including thirty-nine fixosessile species and three planktonic colonial species. This corresponds with about 40 % of the global sessile rotifer diversity, and is the highest alpha-diversity of the group ever recorded from a single lake. The record further includes a new genus, Lacinularoides n. gen., containing a single species L. coloniensis (Colledge, 1918) n. comb., which is redescribed, and several possibly new species, one of which, Ptygura thalenoiensis n. spec. is formally described here. Ptygura noodti (Koste, 1972) n. comb. is relocated from Floscularia, based on observations of living specimens of this species, formerly known only from preserved, contracted specimens from the Amazon region.
    [Show full text]
  • Towards a Management Hierarchy (Classification) for the Catalogue of Life
    TOWARDS A MANAGEMENT HIERARCHY (CLASSIFICATION) FOR THE CATALOGUE OF LIFE Draft Discussion Document Rationale The Catalogue of Life partnership, comprising Species 2000 and ITIS (Integrated Taxonomic Information System), has the goal of achieving a comprehensive catalogue of all known species on Earth by the year 2011. The actual number of described species (after correction for synonyms) is not presently known but estimates suggest about 1.8 million species. The collaborative teams behind the Catalogue of Life need an agreed standard classification for these 1.8 million species, i.e. a working hierarchy for management purposes. This discussion document is intended to highlight some of the issues that need clarifying in order to achieve this goal beyond what we presently have. Concerning Classification Life’s diversity is classified into a hierarchy of categories. The best-known of these is the Kingdom. When Carl Linnaeus introduced his new “system of nature” in the 1750s ― Systema Naturae per Regna tria naturae, secundum Classes, Ordines, Genera, Species …) ― he recognised three kingdoms, viz Plantae, Animalia, and a third kingdom for minerals that has long since been abandoned. As is evident from the title of his work, he introduced lower-level taxonomic categories, each successively nested in the other, named Class, Order, Genus, and Species. The most useful and innovative aspect of his system (which gave rise to the scientific discipline of Systematics) was the use of the binominal, comprising genus and species, that uniquely identified each species of organism. Linnaeus’s system has proven to be robust for some 250 years. The starting point for botanical names is his Species Plantarum, published in 1753, and that for zoological names is the tenth edition of the Systema Naturae published in 1758.
    [Show full text]
  • Interesting Rotifers (Rotifera: Eurotatoria) from Floodplain Lakes of Lower Brahmaputra River Basin of Assam, Northeast India
    Opusc. Zool. Budapest, 2016, 47(2): 123–130 Interesting rotifers (Rotifera: Eurotatoria) from floodplain lakes of lower Brahmaputra river basin of Assam, northeast India 1 B.K. SHARMA & S.I. KHAN Bhushan Kumar Sharma & Shaikhul Islam Khan, Freshwater Biology Laboratory, Department of Zoology, North-Eastern Hill University, Shillong 793 022, Meghalaya, India. E-mail: [email protected] (1corresponding author) Abstract. The plankton and semi-plankton samples collected from four floodplain lakes (beels) of Barpeta district of lower Brahmaputra river basin, Assam state, northeastern India (NEI) revealed eighteen rotifer species of biodiversity and biogeographic interest belonging to five families and six genera. One species is new to the Indian Rotifera and one species is new to Assam. Our collections are characterized by two Australasian elements, five Oriental endemics, seven paleotropical species, and one cosmo (sub) tropical species. Nine species, restricted to date to NEI, are examples of regional distribution importance in India while six species depicted disjunct distribution in the country. Interestingly, seven species are categorized as Eastern hemisphere elements. All the taxa are illustrated to warrant validation as an increasing magnitude of ‘unverifiable records’ is a serious impediment for the progress of rotifer biodiversity in India. Keywords. Biodiversity, distribution, interesting taxa, lower Assam, tropical floodplains. INTRODUCTION MATERIALS AND METHODS ropical and subtropical floodplain lakes are This study is a part of limnological reconnais- Thypothesized to be Rotifera rich habitats sance undertaken in four floodplain lakes (beels) (Segers et al. 1993). The rotifer assemblages of of Barpeta district of Assam (Table 1) during these ecotones are poorly documented in India in August 2011 – July 2013.
    [Show full text]
  • Volume 2, Chapter 4-7C: Invertebrates: Rotifer Taxa
    Glime, J. M. 2017. Invertebrates: Rotifer Taxa – Monogononta. Chapt. 4-7c. In: Glime, J. M. Bryophyte Ecology. Volume 2. 4-7c-1 Bryological 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 4-7c INVERTEBRATES: ROTIFER TAXA – MONOGONONTA TABLE OF CONTENTS Notommatidae ............................................................................................................................................ 4-7c-2 Cephalodella ....................................................................................................................................... 4-7c-2 Drilophaga ........................................................................................................................................ 4-7c-10 Enteroplea ......................................................................................................................................... 4-7c-11 Eosphora ........................................................................................................................................... 4-7c-11 Eothinia ............................................................................................................................................. 4-7c-12 Monommata ...................................................................................................................................... 4-7c-12 Notommata .......................................................................................................................................
    [Show full text]
  • Rotifera: Monogononta)
    Anim. Syst. Evol. Divers. Vol. 36, No. 3: 222-227, July 2020 https://doi.org/10.5635/ASED.2020.36.3.046 Review article New Record of Kellicottia bostoniensis and Redescription of Two Freshwater Rotifers from Korea (Rotifera: Monogononta) Hee-Min Yang, Gi-Sik Min* Department of Biological Sciences, Inha University, Incheon 22212, Korea ABSTRACT In this study, we identified three monogonont rotifers from South Korea: Kellicottia bostoniensis (Rousselet, 1908), Trichocerca tenuior (Gosse, 1886), and Lepadella triptera (Ehrenberg, 1830). The distribution records of K. bostoniensis were mainly located in the Nearctic, Neotropic and Western Palearctic regions. After Japan, this is the second record of it in Asia. Trichocerca tenuior and Lepadella triptera have already been recorded in Korea, but the data of two species were insufficient in previous study. Here, we describe the morphological characteristics of the three species and the trophi structures of K. bostoniensis and T. tenuior. This study is the first to characterize the trophi structure of K. bostoniensis, observed using a scanning electron microscope. In addition, we have determined the partial cytochrome c oxidase subunit 1 (COI) and 18S rRNA gene sequences of T. tenuior and L. triptera for their DNA barcodes. Keywords: ‌biodiversity, East Asia, monogonont rotifers, SEM, taxonomy INTRODUCTION 1999). The genus Trichocerca Lamarck, 1801 is a species-rich Research on rotifers in Korea was started by Hada (1936), who taxon in the monogonont rotifers. It comprises 77 species collected 17 species from Lake Seo-ho in Suwon-si, Gyeong- and inhabits various environments such as fresh, brack- gi-do, South Korea. So far, 305 species have been recorded in ish, and marine water (Segers, 2007; Jersabek and Leitner, Korea (National Institute of Biological Resources and Minis- 2013).
    [Show full text]
  • The Biodiverse Rotifers (Rotifera: Eurotatoria)
    Bonn zoological Bulletin 68 (1): 147–162 ISSN 2190–7307 2019 · Sharma B.K. & Sharma S. http://www.zoologicalbulletin.de https://doi.org/10.20363/BZB-2019.68.1.147 Research article urn:lsid:zoobank.org:pub:D9308652-B9BF-4BBB-B573-F1C4B53E1AC5 The biodiverse rotifers (Rotifera: Eurotatoria) of Northeast India: faunal heterogeneity, biogeography, richness in diverse ecosystems and interesting species assemblages Bhushan Kumar Sharma1, * & Sumita Sharma2 1, 2 Department of Zoology, North-Eastern Hill University, Shillong – 793 022, Meghalaya, India * Corresponding author: Email: [email protected] 1 urn:lsid:zoobank.org:author:FD069583-6E71-46D6-8F45-90A87F35BEFE 2 urn:lsid:zoobank.org:author:668E0FE0-C474-4D0D-9339-F01ADFD239D1 Abstract. The biodiverse Rotifera of northeast India (NEI) revealed 303 species belonging to 53 genera and 24 families; ~96% of these species examined from seven states of NEI affirm the rotifer heterogeneity of our plankton and semi-plank- ton collections. This study documents the record number of species of global and regional biogeographic interest, high- lights affinity with Southeast Asian and Australian faunas, and indicates notable heterogeneity in richness and composition amongst the seven northeastern states. The speciose rotifers of small lentic biotopes of Arunachal Pradesh, Mizoram, Nagaland, Meghalaya, Manipur and Tripura, the floodplain lakes beels( ) and small wetlands (dobas and dubies) of the Brahmaputra and the Barak floodplains of Assam, and the floodplain lakes (pats) of Manipur are noteworthy. Deepor Beel and Loktak Lake (two Ramsar sites) are the globally rich rotifer `hotspots’. Interesting assemblages per sample of 80+ species in certain beels and pats, and up to 50 species in dobas and dubies depict the `Rotifera paradox’.
    [Show full text]
  • On the Serotonergic Nervous System of Two Planktonic Rotifers, Conochilus Coenobasis and C
    ARTICLE IN PRESS Zoologischer Anzeiger 245 (2006) 53–62 www.elsevier.de/jcz On the serotonergic nervous system of two planktonic rotifers, Conochilus coenobasis and C. dossuarius (Monogononta, Flosculariacea, Conochilidae) Rick Hochbergà Department of Biological Sciences, University of Massachusetts, One University Avenue, Lowell, MA 01854, USA Received 21 November 2005; received in revised form 4 April 2006; accepted 10 April 2006 Corresponding editor: M. Schmitt Abstract The serotonergic nervous systems of two non-colonial species of Conochilus were examined to obtain the first immunohistochemical insights into the neuroanatomy of species of Flosculariacea (Rotifera, Monogononta). Species of Conochilus, subgenus Conochiloides, were examined using serotonin (5-HT) immunohistochemistry, epifluorescence and confocal laser scanning microscopy, and 3D computer imaging software. In specimens of C. coenobasis and C. dossuarius, the serotonergic nervous system is defined by a dorsal cerebral ganglion, apically directed cerebral neurites, and paired nerve cords. The cerebral ganglion contains approximately four pairs of small 5-HT- immunoreactive perikarya; one pair innervates the posterior nerve cords and three pairs innervate the apical field. The most dorsal pair innervates a coronal nerve ring that encircles the apical field. Within the apical field is a second nerve ring that outlines the inner border of the coronal cilia. Together, both the inner and outer nerve rings may function to modulate ciliary activity of the corona. The other two pairs of perikarya innervate a region around the mouth. Specific differences in the distribution of serotonergic neurons between species of Conochilus and previously examined ploimate rotifers include the following: (a) a lack of immunoreactivity in the mastax; (b) a greater number of apically directed serotonergic neurites; and (c) a complete innervation of the corona in both species of Conochilus.
    [Show full text]
  • List of Available Names in Zoology, Candidate Part Phylum Rotifera, Genus-Group Names Established Before 1 January 2000
    List of Available Names in Zoology, Candidate Part Phylum Rotifera, genus-group names established before 1 January 2000 compiled by Christian D. Jersabek Willem H. De Smet Claus Hinz Diego Fontaneto Charles G. Hussey Evangelia Michaloudi Robert L. Wallace Hendrik Segers 05 August 2015 List of Available Names in Zoology, candidate part Phylum Rotifera – Genus-group names Abrochtha, Bryce 1910; Journal of the Quekett Microscopical Club, (ser. 2) 11: p.77; type species, by original mono- typy: Philodina intermedia Beauchamp, 1909 [valid; gender feminine] Acanthodactylus, Tessin 1890; Archiv der Freunde der Naturgeschichte in Mecklenburg, 43: p.152; type species, by subsequent designation (Wiszniewski, 1954: Polskie Archiwum Hydrobiologii, 2: p.121): Trichoda rattus Müller, 1776; preoccupied by Acanthodactylus Wiegmann, 1834 (Reptilia) [permanently invalid, junior objective synonym of Trichocerca Lamarck, 1801; gender masculine] Actinurus, Ehrenberg 1830; in Ehrenberg, C G, Organisation, Systematik und geographisches Verhältnis der Infusi- onsthierchen. Zwei Vorträge in der Akademie der Wissenschaften zu Berlin gehalten in den Jahren 1828 [Die geo- graphische Verbreitung der Infusionsthierchen in Nord-Afrika und West-Asien, beobachtet auf Hemprich und Ehren- bergs Reisen] und 1830 [Beiträge zur Kenntnis der Organisation der Infusorien und ihrer geographischen Verbrei- tung, besonders in Sibirien]: p.68; type species, by original monotypy: Actinurus neptunius Ehrenberg, 1830 [junior subjective synonym of Rotaria Scopoli, 1777; gender masculine]
    [Show full text]
  • New Records of 13 Rotifers Including Bryceella Perpusilla Wilts Et Al., 2010 and Philodina Lepta Wulfert, 1951 from Korea
    Journal26 of Species Research 6(Special Edition):26-37,JOURNAL 2017 OF SPECIES RESEARCH Vol. 6, Special Edition New records of 13 rotifers including Bryceella perpusilla Wilts et al., 2010 and Philodina lepta Wulfert, 1951 from Korea Min Ok Song* Department of Biology, Gangneung-Wonju National University, Gangwon-do 25457, Republic of Korea *Correspondent: [email protected], [email protected] Rotifers collected from various terrestrial and aquatic habitats such as mosses on trees or rocks, tree barks, wet mosses and wet leaf litter at streams, and dry leaf litter at four different locations in Korea, were investigated. Thirteen species belonging to nine genera in five families of monogonont and bdelloid rotifers were identified: Bryceella perpusilla Wilts, Martinez Arbizu and Ahlrichs, 2010, Collotheca ornata (Ehrenberg, 1830), Habrotrocha flava Bryce, 1915, H. pusilla (Bryce, 1893), Macrotrachela aculeata Milne, 1886, M. plicata (Bryce, 1892), Mniobia montium Murray, 1911, M. tentans Donner, 1949, Notommata cyrtopus Gosse, 1886, Philodina lepta Wulfert, 1951, P. tranquilla Wulfert, 1942, Pleuretra hystrix Bartoš, 1950 and Proalinopsis caudatus (Collins, 1873). All these rotifers are new to Korea, and B. perpusilla, H. flava, M. montium, P. caudatus, P. hystrix and P. lepta are new to Asia as well. Of interest, the present study is the first to record B. perpusilla outside its type locality. In addition, P. lepta has previously been recorded from only three European countries. Keywords: Korea, new records, rotifera, taxonomy, terrestrial habitats Ⓒ 2017 National Institute of Biological Resources DOI:10.12651/JSR.2017.6(S).037 INTRODUCTION (Donner, 1965). The present study is the first record of Philodina lepta outside Europe as well as the fourth A taxonomic study of rotifers collected from various overall.
    [Show full text]
  • The Rotifers of Spanish Reservoirs: Ecological, Systematical and Zoogeographical Remarks
    91 THE ROTIFERS OF SPANISH RESERVOIRS: ECOLOGICAL, SYSTEMATICAL AND ZOOGEOGRAPHICAL REMARKS Jordi de Manuel Barrabin Departament d'Ecologia, Universitat de Barcelona. Avd. Diagonal 645,08028 Barcelona. Spain,[email protected] ABSTRACT This article covers the rotifer data from a 1987/1988 survey of one hundred Spanish reservoirs. From each species brief infor- mation is given, focused mainly on ecology, morphology, zoogeography and distribution both in Spain and within reservoirs. New autoecological information on each species is also established giving conductivity ranges, alkalinity, pH and temperature for each. Original drawings and photographs obtained on both optical and electronic microscopy are shown of the majority of the species found. In total one hundred and ten taxa were identified, belonging to 101 species, representing 20 families: Epiphanidae (1): Brachionidae (23); Euchlanidae (1); Mytilinidae (1 ): Trichotriidae (3): Colurellidae (8); Lecanidae (1 5); Proalidae (2); Lindiidae (1); Notommatidae (5); Trichocercidae (7); Gastropodidae (5); Synchaetidae (1 1); Asplanchnidae (3); Testudinellidae (3); Conochiliidae (5):Hexarthridae (2); Filiniidae (3); Collothecidae (2); Philodinidae (Bdelloidea) (I). Thirteen species were new records for the Iberian rotifer fauna: Kerutella ticinensis (Ehrenberg); Lepadella (X.) ustucico- la Hauer; Lecane (M.) copeis Harring & Myers; Lecane tenuiseta Harring: Lecane (M.) tethis Harring & Myers; Proales fal- laciosa Wulfert; Lindia annecta Harring & Myers; Notommatu cerberus Hudson & Gosse; Notommata copeus Ehrenberg: Resticula nyssu Harring & Myers; Trichocerca vernalis Hauer; Gustropus hyptopus Ehrenberg: Collothecu mutabilis Hudson. Key Words: Rotifera, plankton, heleoplankton, reservoirs RESUMEN Este urticulo proporciona infiirmacicin sobre 10s rotferos hullados en el estudio 1987/88 realizudo sobre cien embalses espafioles. Para cnda especie se da una breve informacicin, ,fundamentalmente sobre aspectos ecoldgicos, morfoldgicos, zoo- geogriificos, asi como de su distribucidn en EspaAa y en los emldses.
    [Show full text]