• Title, Summary, Keyword: Clitellata

Search Result 11, Processing Time 0.031 seconds

New record of three aquatic species of Enchytraeidae (Annelida: Clitellata) from Korea

  • Lee, Jeounghee;Jung, Jongwoo
    • Journal of Species Research
    • /
    • v.5 no.3
    • /
    • pp.541-546
    • /
    • 2016
  • Enchytraeidae is one of the largest groups in Clitellata. They are commonly found in soil and aquatic environments and play important roles in these ecosystems. It is not easy to study enchytraeid clitellates because of difficulty in distinguishing morphologies between closely related species. In Korea, 29 species have been reported in this family. Of these, 27 species are terrestrial and only two species are aquatic. Here, we report three aquatic enchytraeid species new to Korea: Fridericia glandifera Friend, 1913, Henlea montana Rota, 1994 and Marionina brendae Bretscher, 1899.

Three New Earthworms of the Genus Amynthas (Clitellata: Megascolecidae) from Nam Ha NPA, Laos

  • Hong, Yong;James, Samuel W.;Inkhavilay, Khamla
    • Animal Systematics, Evolution and Diversity
    • /
    • v.30 no.2
    • /
    • pp.81-86
    • /
    • 2014
  • Three new species of Amynthas (Clitellata: Megascolecidae) were discovered in the Nam Ha National Protected Area (NPA) of Laos. These are Amynthas namhaensis sp. nov., Amynthas vanhi sp. nov., and Amynthas angtanensis sp. nov. Amynthas namhaensis sp. nov. and Amynthas vanhi sp. nov. are athecal, with male pores 0.14-0.17 and 0.17-0.19 circumference apart ventrally, respectively. Amynthas angtanensis sp. nov. has four pairs of spermathecal pores on 4/5-7/8, with male pores very closely set at 0.07-0.1 circumference apart. Descriptions of the new species are provided, including illustrations of the ventral view, intestinal caeca, and spermathecae.

New descriptions of enchytraeid species(Clitellata: Enchytraeidae) from Korea

  • Hong, Yong;Dozsa-Farkas, Klara
    • Journal of Species Research
    • /
    • v.7 no.1
    • /
    • pp.80-91
    • /
    • 2018
  • The following seven species of soil enchytraeids belonging to five genera were collected from Korea: Enchytraeus buchholzi $Vejdovsk{\acute{y}}$, 1878, Enchytraeus irregularis Nielsen & Christensen, 1961, Fridericia bulboides Nielsen & Christensen, 1959, Hemifridericia parva Nielsen & Christensen, 1959, Henlea perpusilla Friend, 1911, Henlea ventriculosa (Udekem, 1854), and Marionina argentea Michaelsen, 1889 sensu lato. Species were found in soil and litter layers of sites investigated in 2007, 2008 and 2014. Diagnoses or descriptions for these species are provided here with new micrographs or drawings.

Two Aquatic Oligochaete Species, Dero dorsalis and Allonais pectinata (Annelida: Clitellata: Naididae), New to Korea

  • Lee, Jeounghee;Jung, Jongwoo
    • Animal Systematics, Evolution and Diversity
    • /
    • v.30 no.2
    • /
    • pp.119-123
    • /
    • 2014
  • The genera Dero and Allonais belong to the family Naididae. Most species in the genus Dero have unique morphological characters including a branchial fossa and/or gills at the posterior end of the body. The genus Allonais has no eyes unlike its close relative the genus Nais. Of these genera, one species of Dero, D. obtusa, was recently reported in Korea. However, the genus Allonais has not been recorded in Korea. Here, we report Dero dorsalis Ferroni$\grave{e}$re, 1899 and Allonais pectinata (Stephenson, 1910) with a diagnosis and illustrations.

Six Korean New Records of the Nais Species (Annelida, Clitellata, Naididae)

  • Lee, Jeounghee;Jung, Jongwoo
    • Korean Journal of Environmental Biology
    • /
    • v.33 no.2
    • /
    • pp.153-159
    • /
    • 2015
  • The oligochaete worms in the genus Nais are common to freshwater habitats. These worms have a highly-developed prostomium and pigmented eye spots. All species have hair chaetae, bifid or single pointed needle chaetae on the dorsal side and ventral chaetae beginning in II with bifid crotchets. Most species of Nais genus live in areas where bottom is covered by sand, gravel or organic matter in aquatic plants. Currently, 26 species of Nais have been recorded worldwide. From the recent faunal studies, 3 species of Nais have been newly reported in Korea. Here, we newly report 6 species of Nais with diagnosis, illustrations and identification keys to Korean Nais species: N. behningi, N. pseudobtusa, N. simplex, N. bretscheri, N. stolci and N. elinguis.

New Record of a Naidid Oligochaete Species, Ripistes parasita (Annelida: Clitellata: Naididae) from Korea

  • Jung, Jong-Woo
    • Animal Systematics, Evolution and Diversity
    • /
    • v.28 no.2
    • /
    • pp.137-139
    • /
    • 2012
  • An aquatic oligochaete species, $Ripistes$ $parasita$ (Schmidt, 1847) collected from Ganghwado Island in Korea, is described and illustrated. Specimens inhabiting on aquatic vegetation at the edge of the streams were collected with a plankton hand net. Morphological features of present specimens such as the number of long hair chaetae per bundle and their length in VI-VIII, and shape and size of ventral chaetae are concordant with those of previous reports on this species. The genus $Ripistes$ contains one species, $R.$ $parasite$ which is distributed over, Europe, North America and eastern part of Asia including China and Japan. This is the first record of $R.$ $parasita$ in Korea.

Naidid oligochaetes (Annelida: Clitellata) from the Seokhyeoncheon and Changreungcheon Streams with New Record of Nais variabilis

  • Jung, Jong-Woo
    • Korean Journal of Ecology and Environment
    • /
    • v.44 no.4
    • /
    • pp.407-410
    • /
    • 2011
  • Aquatic Oligochaeta is a notable animal group in freshwater environment such as streams, rivers and lakes in view of its biomass and species richness. Taxonomic studies of this group, however, have hardly been performed in Korea. Here five naidid oligochaete species are reported - Slavina appendiculata, Pristina longiseta, Pristina biserrata, Chaetogaster diaphanus and Nais variabilis - from the Seokhyeoncheon Stream in Yangju and from the Changreungcheon Stream in Goyang, Gyeonggi-do. Aquatic oligochaetes attaching on aquatic vegetations were collected with a plankton hand net. An image and description on Nais variabilis new to Korea are provided.

Four Unrecorded Species of Tubificid Oligochaetes (Annelida: Clitellata) in Korea

  • Lee, Jeounghee;Jung, Jongwoo
    • Animal Systematics, Evolution and Diversity
    • /
    • v.30 no.4
    • /
    • pp.240-247
    • /
    • 2014
  • Tubificid oligochaetes are common and frequently dominant in freshwater benthic habitats. They are so tolerant to water pollution that they are often used as biological indicators. Faunistic studies of Korean freshwater oligochaetes have been actively conducted recently. The most well studied oligochaete family in Korea is the tubificids following the naidids. Nine species of tubificids have been reported so far. Nevertheless, many species of tubificids still remain to be discovered in Korea. In this study, we added four species of tubificid oligochaetes to the Korean fauna, including Linmodrilus profundicola (Verrill, 1871), Potamothrix heuscheri (Bretscher, 1900), Tubifex blanchardi $Vejdovsk\acute{y}$, 1891, and Ilyodrilus templetoni (Southern, 1909) based on specimens collected from three locations in Korea: Cheonan-si, Geoje-si, and Seocheon-gun. In particular, P. heuscheri was first reported in Asia.

Aquatic Oligochaete (Annelida: Clitellata) Fauna from the Jungnang Stream in Seoul, Korea, with Eight New Korean Records

  • Park, Hyung Joon;Timm, Tarmo;Bae, Yeon Jae
    • Korean Journal of Ecology and Environment
    • /
    • v.46 no.4
    • /
    • pp.507-512
    • /
    • 2013
  • Aquatic oligochaetes were investigated from a small amount of sediment sampled from the Jungnang Stream, an urban stream in Seoul, Korea, in November 2012. Sorted oligochaetes were observed under a light microscope in a drop of carbonated water, and then preserved in 70% ethanol. Some specimens were slide mounted using glycerin and Eupharal. As a result, the following 12 species were identified including 8 new Korean records, Bothrioneurum vejdoskyanum Stolc, Branchiodrilus hortensis (Stephenson), Chaetogaster cristalinus Vejdosky, Nais communis Piguet, Nais pardalis Piguet, Dero obtusa d'Udekem, Piguetiella denticulata Liang, and Haemonais waldvogeli Brescher and 4 additional known species, Limnodrilus hoffmeisteri Cleparede, Branchiura sowerbyi Beddard, Chaetogaster diastrophus (Gruithuisen), and Stylaria fossularis Leidy. This study shows how freshwater oligochaetes are diverse even in urban streams in Korea, if a proper sampling and examining method is employed.

First report of the branchiobdellidan Holtodrilus truncatus (Annelida: Clitellata) found on the freshwater atyid shrimp Neocaridina sp. from Korea

  • Ahn, Dong-Ha;Min, Gi-Sik
    • Journal of Species Research
    • /
    • v.5 no.3
    • /
    • pp.459-462
    • /
    • 2016
  • The branchiobdellidan species Holtodrilus truncatus (Liang, 1963) is reported for the first time in Korea. The genus Holtodrilus Gelder and Brinkhurst, 1990 is monotypic within the family Xironodrilidae, and the genus and family of this species are also new to the Korean fauna. The branchiobdellidan specimens were collected from the exoskeletons of the freshwater atyid shrimp, Neocaridina sp., sampled from the 'Andeok Valley', Jeju-do Province, South Korea. Holtodrilus truncatus is characterized by its terete body form, 7/7 dental formula (with a large medial tooth and three pairs of smaller lateral teeth), and no trunk appendages. In addition, we determined a partial sequence of the mitochondrial cytochrome c oxidase subunit 1 (CO1) gene as a DNA barcode marker for H. truncatus. The present study is the first record of the branchiobdellidan occurrence on a non-crayfish host (shrimp) in Korea. To date, seven species (four genera in three families) of branchiobdellidans have been reported in the Korean fauna.