• Title/Summary/Keyword: isopods

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New Report of Two Species of Genus Pentias (Crustacea: Malacostraca: Isopoda) from South Korea

  • Song, Ji-Hun;Min, Gi-Sik
    • Korean Journal of Environmental Biology
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    • v.33 no.2
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    • pp.177-181
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    • 2015
  • Two marine isopods, Pentias hayi Richardson, 1904 and P. thompsoni Collinge, 1916 were verified as unrecorded species in South Korea. The genus Pentias is reported for the first time in South Korea. These two isopods were collected from Heuksan-do Island and Ulleung-do Island from South Korea, respectively. We provide descriptions of the diagnostic characteristics, illustrations of two species and their partial sequences of the mitochondrial cytochrome c oxidase subunit 1 (CO1) for molecular characteristics.

Descriptions of Two Cymothoid Isopods (Crustacea, Isopoda, Cymothoida) from Korean Waters

  • Kim, Sung Hoon;Yoon, Seong Myeong
    • Animal Systematics, Evolution and Diversity
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    • v.36 no.4
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    • pp.372-381
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    • 2020
  • Two cymothoid isopods, Rocinela niponia Richradson, 1909 and Bopyrus squillarum Latreille, 1802, are first reported from Korean waters. Rocinela niponia can be distinguished from its congeners by the following characteristics: the rostral point is round; the eyes are separated from each other; and each pereopods 1-3 has the propodal blade bearing eight robust setae. Bopyrus squillarum is distinguishable from its related species by the following characteristics: the head is separated from pereonite 1, but partially fused on the lateral margins; the first pleonite on the short side is much smaller than other segments; and it is parasitic on the branchial chamber of Palaemon serrifer. Detailed descriptions and figures of these two species are provided in this paper.

Isopod Parasite Induced Secondary Microbial Infection in Marine Food Fishes

  • Ravichandran, S;Sivasubramanian, K;Parasuraman, P;Rajan, D. Karthick;kumar, G. Ramesh
    • Journal of fish pathology
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    • v.29 no.1
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    • pp.1-5
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    • 2016
  • Isopods are parasitic crustaceans that pose serious threat to fisheries. Several studies have tried to explore the host-pathogen relationship between marine fishes and isopods. The present study aims to understanding the secondary infections in marine fishes pertaining to isopods. To assess the secondary infection in infected fishes, parasite infested and healthy tissues of fishes were collected. The samples were subjected to standard microbiological procedure to identify the presence of pathogenic bacteria and fungi. Our results showed the branchial region had the higher microbial load of non-sporulating cenocytic fungi in infected fishes. Moreover, fungal strains isolated from the parasitic lesion confirmed that the parasitation and body lesion facilitates the entry of several pathogenic microbes at the damaged host tissue. More over the immune regulation of fish fights back by producing minute cysts, trying to encapsulate the growing fungus. But this may eventually lead to systemic infestation and death of the fish.

New record of limnoriid and asellote species(Crustacea: Malacostraca: Isopoda) from South Korea

  • Song, Ji-Hun;Min, Gi-Sik
    • Journal of Species Research
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    • v.6 no.3
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    • pp.237-240
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    • 2017
  • During a scientific survey of Korean isopod fauna, we discovered two marine isopods, Limnoria segnoides Menzies, 1957 and Munna japonica Shimomura and Mawatari, 2001, which are new records to South Korea. Limnoria segnoides and M. japonica were collected by SCUBA diving from the subtidal zone of Jeju Island and Yangyang-gun in South Korea, respectively. In this paper, we provide diagnosis and illustrations of the two isopods. Additionally, we provide GenBank accession numbers of partial sequences of mitochondrial cytochrome c oxidase subunit 1 (CO1) of two species.

First Records of Two Cirolanid Species (Isopoda, Cymothooidea, Cirolanidae) from Korean Waters

  • Kim, Sung Hoon;Yoon, Seong Myeong
    • Animal Systematics, Evolution and Diversity
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    • v.35 no.4
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    • pp.168-181
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    • 2019
  • Two cirolanid isopods, Eurydice longiantennata Nunomura and Ikehara, 1985 and Metacirolana japonica (Hansen, 1890), are newly reported based on the materials collected from the subtidal zone around Jeju Island. Eurydice longiantennata can be distinguishable from its congeners by the following features: body length is 5 mm; antennule is not extending beyond the cephalon; flagellum of the antenna is consisted of 31 flagellar articles; and pleotelson has eleven teeth and twelve setae distally. Metacirolana japonica is distinguished from its related species by the following characteristics: body is not ornament; pleonite 1 is entirely visible dorsally in male; pleotelson is gradually tapering distally; and uropodal rami have serrate margins.

New record of two cymothoid isopods (Crustacea: Malacostraca: Isopoda) from South Korea

  • Song, Ji-Hun;Min, Gi-Sik
    • Journal of Species Research
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    • v.5 no.3
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    • pp.313-317
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    • 2016
  • Two marine isopods, Elaphognathia sugashimaensis (Nunomura, 1981) and Metacirolana shijikiensis Nunomura, 2008, have been reported for the first time in South Korea. Specimens of E. sugashimaensis and M. shijikiensis were collected using light traps from Yeongdeok-gun and Gageo-do Island in South Korea, respectively. The genera Elaphognathia Monod, 1926 and Metacirolana Kussakin, 1979 are new to South Korea. In this paper, we provide descriptions of diagnostic characteristics and illustrations of their morphologies. Additionally, the partial sequences of mitochondrial cytochrome c oxidase subunit 1 (CO1) of two species are provided as molecular characteristics.

New Records of Gnathiid and Limnoriid Species (Malacostraca, Peracarida, Isopoda) in Korean Fauna

  • Kim, Sung Hoon;Yoon, Seong Myeong
    • Animal Systematics, Evolution and Diversity
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    • v.36 no.3
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    • pp.202-211
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    • 2020
  • Two isopods, Elaphognathia lucanoides Monod, 1926 and Limnoria saseboensis Menzies, 1957, are newly recorded in Korean fauna. Elaphognathia lucanoides can be distinguished from its congeners by the following characteristics combined: the cephalon is strongly excavated on the anterior margin; the paraocular ornamentation is forming a ridge distinctly; and the mandible is longer than cephalon. Limnoria saseboensis differs from the related species by the following features: pleonite 5 has two parallel longitudinal carinae; the pleotelson has one or two pairs of tubercles and two carinae; and the tubercles are present on the posterior margin of the pleotelson. In this paper, detailed descriptions and figures of these two species are provided.

DNA Barcoding of Eurydice longiantennata (Isopoda, Cymothooidea, Cirolanidae) from South Korea

  • Kim, Sung Hoon;Choi, Hyun Ki;Kim, Jong Guk
    • Animal Systematics, Evolution and Diversity
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    • v.37 no.4
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    • pp.354-357
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    • 2021
  • In Korean waters, the cirolanid isopod, Eurydice longiantennata Nunomura and Ikehara, 1985 has been reported only from the subtidal zone of Jeju island. We obtained the mitochondrial cytochrome c oxidase subunit I (COI) sequences of this species and determined the DNA barcoding data of E. longiantennata based on a genetic comparison of E. longiantennata and its congeners. The intra-specific genetic distance between the three COI sequences of E. longiantennata ranged from 0 to 0.6%. The inter-specific distances between E. longiantennata and other cirolanid isopods ranged from 24 to 33.2%. In this study, we provided the DNA information of E. longiantennata with a morphological diagnosis and images of the species.