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Issue: Vol. 4093 No. 2: 22 Mar. 2016
Type: Article
Published: 2016-03-21
DOI: 10.11646/zootaxa.4093.2.8
Page range: 275–284
Abstract views: 34
PDF downloaded: 1

First records of Enchytraeidae (Annelida, Clitellata) from the Three Parallel Rivers region

College of Life and Science, Zao Zhuang University, Zaozhuang, Shandong Province, China
College of Life and Science, Zao Zhuang University, Zaozhuang, Shandong Province, China
The Key Laboratory of Aquatic Biodiversity and Conservation, Institute of Hydrobiology, Chinese Academy of Sciences,Wuhan, Hubei Province, China
Annelida Enchytraeidae Oligochaeta Mesenchytraeus Chamaedrilus Cognettia new species new record China

Abstract

The Three Parallel Rivers region is not only an important World Natural Heritage area but also one of the hotspots of world biodiversity with many endemic organisms. However, little is known about the soil fauna of this region, and nothing about enchytraeids. Here we describe two species from the Laojun Mountain, one of the eight eminent mountain chains in this region, Chamaedrilus cf. ozensis Torii, 2015 and Mesenchytraeus laojunensis sp. nov. The latter belongs to a group of Mesenchytraeus species characterized by spermathecae with one ampullar diverticulum and a communication with the oesophagus, and is thus far the southernmost member of this genus in China. It has two exceptional traits within Mesenchytraeus: a large sperm funnel (more than 2000 µm in length) and a subterminal attachment of the vas deferens to the atrium. In addition, it is distinguished from the other congeners within this group by coelomocytes with distinct refractile vesicles, five pairs of preclitellar nephridia, and the presence of abundant and flame-shaped sperm bundles in sperm sacs, which extend backwards into XVII–XXII.

 

References

  1. Černosvitov, L. (1928) Die Oligochaetenfauna der Karpathen. Zoologische Jahrbücher. Abteilung für Systematik, Geographie und Biologie der Tiere. Jena, 55, 1–28.

    Chen, J. & Cao, L.K. & Chen, Y. (2004) Value of world natural heritage "Three Parallel Rivers" – scene diversity. Journal of Chinese Landscape Architecture, 1, 22–26. [in Chinese]

    Christensen, B. & Dózsa–Farkas, K. (1999) The enchytraeid fauna of the Palearctic tundra (Oligochaeta, Enchytraeidae). The Royal Danish Academy of Sciences and Letters, Biologiske Skrifter, 52, 1–37.

    Deng, M. & Zhou, Z.K. (2004) Seed plant diversity on screes from northwest Yunnan. Acta Botanica Yunnanica, 26 (1), 23–34.

    Healy, B. & Rota, E. (1992) Methods for collecting enchytraeids during expeditions. Soil Biology & Biochemistry, 24, 1279–1281.
    http://dx.doi.org/10.1016/0038-0717(92)90106-8

    Healy, B. & Timm T. (2000) Mesenchytraeus kuril, a new species of Enchytraeidae (Annelida: Oligochaeta) from Kamčatka, Russian Far East. Species Diversity, 5, 177–182.

    Martinsson, S., Rota, E. & Erséus, C. (2015) Revision of Cognettia (Clitellata, Enchytraeidae): re-establishment of Chamaedrilus and description of cryptic species in the sphagnetorum complex. Systematics and Biodiversity, 13 (3), 257–277.
    http://dx.doi.org/10.1080/14772000.2014.986555

    Nantel, P. & Neumann, P. (1992) Ecology of ectomycorrhizal basidiomycete communities on a local vegetation gradient. Ecology, 73, 99–117.
    http://dx.doi.org/10.2307/1938724

    Nurminen, M. (1965) Enchytraeids (Oligochaeta) from northern Norway and western Lappland. Annales Zoologici Fennici, 2, 11–15.

    O’Connor, F.B. (1962) The extraction of Enchytraeidae from soil. In: Murphy P.W. (Ed.), Progress in Soil Zoology. Butterworths Publishers, London, pp. 279–285.

    O’Dell, T.E., Ammirati, J.F. & Schreiner, E.G. (1999) Species richness and abundance of ectomycorrhizal basidiomycete sporocarps on a moisture gradient in the Tsuga heterophylla zone. Canadian Journal Botany, 77, 1699–1711.
    http://dx.doi.org/10.1139/b99-144

    Piper, S.R., MacLean, S.F. & Christensen, B. (1982) Enchytraeidae (Oligochaeta) from taiga and tundra habitats of northeastern U.S.S.R. Canadian Journal of Zoology, 60, 2594–2609.
    http://dx.doi.org/10.1139/z82-334

    Schmelz, R.M. & Collado, R. (2010) A guide to European terrestrial and freshwater species of Enchytraeidae (Oligochaeta). Soil Organisms, 82, 1–176.

    Schmelz, R.M. & Collado, R. (2012) A guide to European terrestrial and freshwater species of Enchytraeidae (Oligochaeta): first supplement. – Landbauforschung – vTI Agriculture and Forestry Research, Special Issue, 357, 53–66.

    Schmelz, R.M., Collado, R. & Römbke, J. (2015) Cognettia Nielsen & Christensen, 1959 (Annelida, Oligochaeta, Enchytraeidae): proposed precedence over Euenchytraeus Bretscher, 1906 and Chamaedrilus Friend, 1913. Bulletin of Zoological Nomenclature, 72, 186–192.

    Shen, Q., Chen, J. & Xie, Z.C. (2011) Mesenchytraeus megachaetus, a new enchytraeid with enlargened ventral chaetae (Annelida, Clitellata) from Changbaishan Mountain, China. Proceedings of the Biological Society of Washington, 124 (2), 127–133.
    http://dx.doi.org/10.2988/11-01.1

    Shen, Q., Chen, J. & Xie, Z.C. (2012 a) Mesenchytraeus monodiverticulus sp. nov. (Annelida: Clitellata: Enchytraeidae) from Changbai Mountain, with a key to Mesenchytraeus with enlarged chaetae. Proceedings of the Biological Society of Washington, 125 (3), 215–227.
    http://dx.doi.org/10.2988/12-08.1

    Shen, Q., Chen, J. & Xie, Z.C. (2012 b) Mesenchytraeus anisodiverticulus, a new enchytraeid with enlarged ventral chaetae (Annelida, Clitellata) from north–eastern China. Italian Journal of Zoology, 79 (1), 86–91.
    http://dx.doi.org/10.1080/11250003.2011.620638

    Southern, R. (1909) Contributions towards a monograph of the British and Irish Oligochaeta. Proceedings of the Royal Irish Academy, 27 B, 119–182.

    Timm, T. & Popchenko, V. (1978) The aquatic Oligochaeta from lakes of the Murmansk Region. Hydrobiological Researches, Institute of Zoology and Botany of the Estonian Academy of Sciences, 7, 79–111.

    Torii, T. (2015) Descriptions of two new and one newly recorded enchytraeid species (Clitellata, Enchytraeidae) from the Ozegahara Mire, a heavy snowfall highmoor in Central Japan. Zootaxa, 4000 (4), 473–482.
    http://dx.doi.org/10.11646/zootaxa.4000.4.6

    Xie, Z.C. (2012) Mesenchytraeus gigachaetus, new name, a replacement name for Mesenchytraeus megachaetus Shen et al., 2011. Proceedings of the Biological Society of Washington, 125 (1), 18–18.
    http://dx.doi.org/10.2988/11-41.1

    Xu, J.C. & Wilkes, A. (2004) Biodiversity impact analysis in northwest Yunnan, southwest China. Biodiversity & Conservation, 13 (5), 959–983.
    http://dx.doi.org/10.1023/B:BIOC.0000014464.80847.02

    Zhang, Y., Chen, L.J. & Zhou, T.X. (2006) Nidulariaceae distributed in Laojunshan mountainous area, Lijiang, northwest of Yunnan Province. Journal of Southwest Forestry College, 26, 62–66 [in Chinese]

    Zhang, Y., Zhou. D.Q., Zhao. Q. & Zhou, T.X. (2010) Diversity and ecological distribution of macrofungi in the Laojun Mountain region, southwestern China. Biodiversity and Conservation, 19, 3545–3563.
    http://dx.doi.org/10.1007/s10531-010-9915-9

    Zhao, Q., Zhang, Y., Yuan, L.C., Li, R.C., Xu, Z.Z., Zhou, D.Q. & Yang, L.Y. (2006) Study on the resources and utilization of medical fungi in Laojun Mountain. Journal of Microbiology, 26 (4), 85–88 [in Chinese]