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Issue: Vol. 1524 No. 1: 9 Jul. 2007
Type: Articles
Published: 2007-07-09
DOI: 10.11646/zootaxa.1524.1.3
Page range: 35–45
Abstract views: 42
PDF downloaded: 2

Establishment of a new peritrich ciliate genus, Pseudepistylis n. gen. (Ciliophora: Peritrichia: Epistylididae), with a description of a new freshwater species, Pseudepistylis songi n. sp. from Wenzhou, China

Hangzhou Key Laboratory for Animal Sciences and Technology, Hangzhou Normal University, Hangzhou 310036, China
Hangzhou Key Laboratory for Animal Sciences and Technology, Hangzhou Normal University, Hangzhou 310036, China Life and Environment College, Harbin Normal University, Harbin 150080, China
Department of Zoology, Natural History Museum, Cromwell Road, London SW7 5BD, UK
Ciliophora Taxonomy infraciliature morphology silverline system myoneme colony

Abstract

A new colonial sessilid peritrich genus, Pseudepistylis, is established. Pseudepistylis n. gen. belongs to the family Epistylididae, (i.e. colonial with a non-contractile stalk and peristomial disc not borne on a stalk) but has oral ciliature that makes less than two turns on the peristome before entering the infundibulum and a reticulate silverline system. Morphology, infraciliature and silverline system of the type species Pseudepistylis songi n. sp., isolated from a freshwater pond near Wenzhou, China, have been investigated both in vivo and following silver impregnation. The new species is characterized by small colony size of only one to eight zooids borne upon a slender, dichotomously branched stalk. Zooids are bell-shaped, in vivo approximately 220 × 140 μ m, with wide peristomial lip that are invariably reflected aborally, single contractile vacuole at the dorsal wall of the infundibulum, and C-shaped macronucleus. The pellicle of contracted zooids shows several large, characteristic folds. The silverline system is reticulate with at least 137 silverlines between the peristomial area and the aboral ciliary wreath and approximately 77 between the aboral ciliary wreath and the scopula. The haplokinety and polykinety complete approximately one and one-quarter turns of the peristome before entering the infundibulum. Within the infundibulum the kineties of infundibular polykinety 2 (P2) terminate at different levels between P1 and P3. The myoneme system is also described.

References

  1. Bory de St. Vincent, J.B. (1826) Essai d’une Classification des Animaux Microscopiques. Agasse, Paris 104 pp.

    Corliss, J.O. (1979) The Ciliated Protozoa: Characterization, Classification and Guide to the Literature, 2nd Ed. Pergamon Press, New York.

    Ehrenberg, C.G. (1830). Beiträge zur Kenntniss der Organisation der Infusorien und ihrer geographischen Verbeitung, besonders in Siberien. Abhandlungen der Akademie der Wissenschaften zu Berlin, year 1830, 1-88.

    Ehrenberg, C.G. (1831) Űber die Entwickelung und Lebensdauer der Infusionsthiere: nebst ferneren Beiträgen zu einer Vergleichung ihrer organischen Systeme. Abhandlungen der Akademie der Wissenschaften zu Berlin, year 1831, 1-154.

    Foissner, W. & Schiffmann, H. (1974) Vergleichende Studien an argyrophilen Strukturen von vierzehn peritrichen Ciliaten. Protistologica, 10, 489–508.

    Foissner, W. & Schubert, G. (1977) Morphologie der Zooide und Schwärmer von Heteropolaria colisarum gen. nov., spec. nov. (Ciliata, Peritrichida), einer symphorionten Epistylidae von Colisa fasciata (Anabantoidei, Belontiidae). Acta Protozoologica, 16, 231–247.

    Foissner, W., Berger H. & Kohmann F. (1992) Taxonomische und Ökologische Revision der Ciliaten des Saprobiensystems—Band II: Peritrichia, Heterotrichida, Odontostomatida. Informationsberichte der Bayer. Landesamtes für Wasserwirtschaft, 5/92, 1–502.

    Jankowski, A.W. (1985). Life cycles and taxonomy of generic groups, Scyphidia, Heteropolaria, Zoothamnium and Cothurnia (Class Peritricha). Trudy Zoologicheskogo Institute, Akademiya Nauk SSSR, Leningrad. 129, 74-100 (in Russian).

    Ji, D., Song, W. & Warren, A. (2004) Rediscovery and redescription of the marine peritrichous ciliate Epicarchesium abrae (Precht, 1935) nov. comb. (Protozoa, Ciliophora, Peritrichia). European Journal of Protistology, 40, 219–224.

    Kahl, A. (1933) Ciliata libera et ectocommensalia. In Grimpe, G. & Wagler, E. (Ed.), Die Tierwelt der Nord- und Ostsee, Lief 23 (Tiel II, c3), Leipzig, pp. 29-146.

    Kahl, A. (1935) Urtiere oder Protozoa I: Wimpertiere oder Ciliata (Infusoria). 4. Peritricha und Chonotricha. In: Dahl, F. (Ed.), Die Tierwelt Deutschlands, 30, 651–886.

    Kent, W.S. (1880–1882) A Manual of the Infusoria: including a description of all known flagellate, ciliate, and tentaculiferous protozoa, British and foreign, and an account of the organization and the affinities of the sponges. David Bogue, London. (Vol. I, 1880, 1–432; Vol. II, 1881, 433–720; Vol. II, 1882, 721–913; Vol. III, 1882, Plates).

    Leitner, A.R. & Foissner, W. (1997) Taxonomic characterization of Epicarchesium granulatum (Kellicott, 1887) Jankowski, 1985 and Pseudovorticella elongata (Fromentel, 1876) nov. comb., two peritrichs (Protozoa, Ciliophora) from activated sludge. European Journal of Protistology, 33, 13–29.

    Linnaeus, C. (1767) Systema Naturae. Vol. 1. 12th ed. Salvii Holmiae, 1327 pp.

    Lynn, D.H. & Small, E.B. (2002) Phylum Ciliophora. In: Lee, J.J., Leedale, G.F. and Bradbury, P. (Ed.) An Illustrated Guide to the Protozoa, 2nd ed. Society of Protozoologists, Lawrence, Kansas, 371–656.

    Puytorac, P. de et al. (1974) Proposition d’une classification du phylum Ciliophora Doflein, 1901 (reunion de systématique, Clermont-Ferrand). Compte Rendu de l’Akademie des Sciences. 278, 2799-2802.

    Qi, G., Shi, X.L. & Feng, W. (2005) Studies on the morphology and infraciliature of Epistylis galea. Acta Hydrobiologica Sinica, 29, 444–449. (in Chinese with English summary).

    Shen, Y. (1980) Six new species of periphytic protozoa in Lake Dong Hu, Wuhan. Acta Hydrobiologica Sinica, 7, 245–252. (in Chinese with English summary).

    Shi, X.B. & Frankel, J. (1990) Morphology and development of mirror-image doubles of Stylonychia mytilus. Journal of Protozoology, 37, 1–13.

    Shi, X.L., Warren, A., Yu, Y. & Shen, Y. (2004) Infraciliature and myoneme system of Campanella umbellaria (Protozoa, Ciliophora, Peritrichida). Journal of Morphology, 261, 43–51.

    Song, W. & Wang, M. (1995) Newly improved dry silver-nitrate method applied to silverline system of ciliate. Chinese Journal of Zoology, 30, 38–39. (in Chinese).

    Song, W. (1986) Descriptions of seven new species of peritrichs on Penaeus orientalis (Peritricha: Zoothamnidae: Epistylididae). Acta Zootaxonomica Sinica, 11, 225–235. (in Chinese with English summary).

    Song, W. (1997) A new genus and two new species of marine peritrichous ciliates (Protozoa, Ciliophora, Peritrichida) from Qingdao, China. Ophelia, 47, 203–214.

    Song, W., AL-Rasheid, K.A.S. & Hu, X. (2002) Notes on the poorly known marine peritrichous ciliate, Zoothamnium plumula Kahl, 1933 (Protozoa: Ciliophora), an ectocommensal organism from cultured scallops in Qingdao, China. Acta Protozoologica, 41, 163–168.

    Stein, F. (1859) Der Organismus der Infusionsthiere nach eigenen Forschungen in systematischer Reihenfolge bearbeitet. I. Leipzig. 206 pp.

    Stiller, J. (1931) Die Peritrichen Infusorien von Tihany und Umgebung. Arbeiten des Ungarischen Biologischen Forschungs Institutes, 4, 171–205.

    Sun, P., Song, W. & Warren, A. (2006) Taxonomic characterization of two marine peritrichous ciliates, Epicarchesium corlissi n. sp. and Pseudovorticella jiangi n. sp. (Ciliophora: Peritrichia), from northern China. European Journal of Protistology, 42, 281–289.

    Warren, A. (1986) A revision of the genus Vorticella (Ciliophora: Peritrichida). Bulletin of the British Museum (Natural History) (Zoology Series), 50, 1–57.