• 제목/요약/키워드: Morphological Evolution

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A New Record of Stephanasterias albula (Asteroidea: Forcipulatida: Asteriidae) from the East Sea, Korea

  • Lee, Taek-Jun;Shin, Sook
    • Animal Systematics, Evolution and Diversity
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    • 제26권3호
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    • pp.345-347
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    • 2010
  • A sea star was collected with fishing nets at a depth of approximately 100-160 m in the East Sea and was identified as Stephanasterias albula (Stimpson, 1853) belonging to the family Asteriidae of the order Forcipulatida. This species characterized by having the capability of asexual reproduction by self-division turned out to be new to the Korean fauna. Its morphological characteristics are redescribed with illustrations. Thirty one species of sea stars including S. albula are now recorded from the East Sea of Korea.

A Newly Recorded Sea Star (Asteroidea: Valvatida) from Jejudo Island, Korea

  • Shin, Sook
    • Animal Systematics, Evolution and Diversity
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    • 제26권3호
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    • pp.349-351
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    • 2010
  • Some asteroid specimens were collected from the subtidal zone near Gapado, Jejudo Island with fishing net on June 2010. Among them, Anseropoda petaloides (Goto, 1914) which belongs to the family Asterinidae of the order Valvatida turned out to be a new record from Korea. Morphological characters of this species collected at 130 m deep are redescribed with photographs. This species is characterized by its very thin body composed of plates imbricated into each other like scales. Twenty four asteroids are currently known from Jejudo Island, Korea.

Paramolgus orientalis n. sp. (Copepoda: Cyclopoida: Rhynchomolgidae) Associated with an Antipatharian Coral from Korea

  • Choe, Mi-Kyung;Kim, Il-Hoi
    • Animal Systematics, Evolution and Diversity
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    • 제26권1호
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    • pp.49-54
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    • 2010
  • Paramolgus orientalis n. sp. is described as an associate of the antipatharian coral Antipathes japonicus from Jeju Island, Korea. The new species is distinguished from its three relatives P. constrictus, P. delicatulus, and P. insectus, all known from antipatharians in tropical waters, by its long caudal ramus which is more than four times as long as wide, by the possession of 4 setae on maxillule, and by other morphological differences in the antenna and maxilla.

A New Record of Invasive Alien Colonial Tunicate Clavelina lepadiformis (Ascidiacea: Aplousobranchia: Clavelinidae) in Korea

  • Pyo, Joo-Yeon;Shin, Sook
    • Animal Systematics, Evolution and Diversity
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    • 제27권2호
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    • pp.197-200
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    • 2011
  • Tunicates were collected from three harbors (Gampo, Bangeojin, Daebyeon) in Gyeongsangnam-do and one harbor (Seogwipo) in Jejudo Island during the period from August 2008 to January 2011 and were identified on the basis of their morphological characteristics. Among them, colonial tunicate Clavelina lepadiformis (Muller, 1776) belonging to the family Clavelinidae was found to be an invasive alien species introduced from the North Atlantic, and this is the first record of its occurrence in Korea.

First Record of the Genus Pagurixus (Crustacea: Decapoda: Anomura: Paguridae) from Hyung-ge Island, Southern Korea

  • Kim, Mi-Hyang;Kim, Jung-Nyun;Oh, Chul-Woong
    • Animal Systematics, Evolution and Diversity
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    • 제27권2호
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    • pp.176-179
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    • 2011
  • A pagurid hermit crab, Pagurixus patiae collected from Hyung-ge Island, Busan, southern Korea is newly recorded into the Korean fauna. Pagurixus patiae is the only species of the genus recorded in Korea. Morphological descriptions of P. patiae are provided.

Two New Eisenia Species from South Korea Similar to E. koreana and Comparable to Eisenoides from USA (Oligochaeta: Lumbricidae)

  • Blakemore, Robert J.;Park, Tae Seo
    • Animal Systematics, Evolution and Diversity
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    • 제28권4호
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    • pp.297-303
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    • 2012
  • New Korean lumbricids are described: Eisenia gaga Blakemore sp. nov. from remote Gageodo Island and E. sindo Blakemore, sp. nov. from an island at Incheon. Both are comparable to Eisenia koreana (Zicsi, 1972) from near Pyongyang, North Korea. A remarkable yet previously unrecognized similarity to American earthworm Eisenoides carolinensis (Michaelsen, 1910) is discussed, but synonymy is rejected on tenuous morphological grounds (form of nephridial vesicle bladders) with taxonomy supported by objective molecular data (mtDNA cytochrome c oxidase subunit 1 barcodes).

Zoeal Stages of Pisidia serratifrons (Crustacea: Decapoda: Porcellanidae) under Laboratory Conditions

  • Kim, Han-Ju;Ko, Hyun-Sook
    • Animal Systematics, Evolution and Diversity
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    • 제27권1호
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    • pp.53-58
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    • 2011
  • The zoeal stages of Pisidia serratifrons are described and illustrated for the first time and its morphological characteristics are compared with those of three known Pisidia species of the family Porcellanidae. The zoea of P. serratifrons differs from those of other Pisidia (P. brasiliensis, P. dispar, and P. dehaanii), by having 11 spinules on the exopod of the antenna. In order to facilitate the study of plankton-collected material, a provisional key is provided for identification of the Korean porcellanid zoeae.