• Title, Summary, Keyword: Halymeniales

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Verifying a new distribution of the genus Amalthea (Halymeniales, Rhodophyta) with description of A. rubida sp. nov. from Korea

  • Lee, Hyung Woo;Yang, Mi Yeon;Kim, Myung Sook
    • ALGAE
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    • v.31 no.4
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    • pp.341-349
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    • 2016
  • The red algal genus Amalthea was first described from New Zealand with one species, A. freemaniae. We discovered a new species of Amalthea from Korea, Amalthea rubida sp. nov., and described it based on morphology and rbcL sequences. A. rubida is characterized by a foliose, membranous and soft thallus having loosely arranged anticlinal medullary filaments, much like A. freemaniae, except for a difference of the cortex thickness in the basal part of vegetative structure. In the rbcL phylogenetic analyses, A. rubida formed a clade with A. freemaniae from New Zealand and Halymenia abyssicola from Mexico. A. rubida showed 5.7% interspecific divergence to A. freemaniae and 4.7% to H. abyssicola. Our discovery of A. rubida expands the distribution of Amalthea from the oceanic southwestern Pacific into the continental northwestern. A targeted global study is needed to fully reveal the species diversity and phylogenetic relationships of the genus Amalthea and members of the order Halymeniales.

Grateloupia jejuensis (Halymeniales, Rhodophyta): a new species previously confused with G. elata and G. cornea in Korea

  • Kim, Su Yeon;Han, Eun Gyu;Kim, Myung Sook;Park, Jung Kwang;Boo, Sung Min
    • ALGAE
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    • v.28 no.3
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    • pp.233-240
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    • 2013
  • Despite specimens' large size and ease of collection in northeast Asian waters, the species diversity of the genus Grateloupia still needs more research in Korea. We investigated plastid rbcL sequences and carried out detailed morphological observation on flattened halymeniacean red alga collected in twelve locations around Korea and Japan. We describe Grateloupia jejuensis sp. nov. based on the distinct clade with high support in our rbcL tree. Grateloupia jejuensis is characterized by solitary or caespitose habit and flattened thalli with discoid holdfast, cartilaginous texture, and blunt or bifid axis. Grateloupia jejuensis was distantly related to G. elata and G. cornea, which have been morphologically confused with the former, and it formed a sister relationship with Prionitis filiformis from California, USA in the rbcL tree.

Cryptonemia rotunda (Halymeniales) and Schizymenia apoda (Nemastomatales), two new records of red algae from Korea

  • Kim, Su-Yeon;Seo, Tae-Ho;Park, Jeong-Kwang;Boo, Ga-Hun;Kim, Kyeong-Mi;Boo, Sung-Min
    • ALGAE
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    • v.27 no.1
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    • pp.1-8
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    • 2012
  • Here we report the first finding of Cryptonemia rotunda and Schizymenia apoda in Korea based on plastid rbcL sequence analysis and morphological observations. C. rotunda occurred in the subtidal in Hongdo and Namyeodo on the south coast. Thalli have short stipe with foliose, membranous blades with dentate margin, a length of 2-8 cm. S. apoda occurred in many locations along the coast of Korea. Thalli are foliose, simple or broadly lanceolate blades with irregular lobes and proliferations from the margins, sometimes undulate, soft fleshy, and slippery, up to 32 cm tall, and have cystocarps with ostioles on the blade. Plastid rbcL sequences reveal that each of these species is clearly separated from other species of their respective genera. S. apoda was well resolved within the genus. However, C. rotunda was distantly related to other members of the genus, and this result needs an urgent revision of the genus.