ALGAE

  • 제37권1호
  • /
  • Pages.15-32
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  • 2022
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  • 1226-2617(pISSN)
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  • 2093-0860(eISSN)
한국조류학회(藻類) (The Korean Society of Phycology)
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Based on morphology and molecular data, Palisada rigida comb. nov. and Laurencia decussata comb. et stat. nov. (Rhodophyta, Rhodomelaceae) are proposed

  • Metti, Yola (Australian Institute of Botanical Science, Royal Botanic Gardens and Domain Trust)
  • 투고 : 2021.09.29
  • 심사 : 2022.02.21
  • 발행 : 2022.03.15
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초록

Inspecting herbaria collections of Laurencia rigida highlighted frequent misidentifications between L. rigida and L. heteroclada f. decussata, two poorly studied taxa from Australia. Recent collections of DNA material, including from topotype material, allowed for re-examination of these two taxa using molecular techniques. Detailed morphological and molecular analyses based on two markers (rbcL and COI-5P) strongly supported these two taxa as being distinct from each other and requiring nomenclatural changes. Comprehensive morphological analyses highlighted features useful for accurate identifications. Interestingly, L. rigida was found to belong to the genus Palisada with evidence from both the morphology and molecular data. Therefore, this study proposed recognizing L. rigida as Palisada rigida comb. nov. Molecular data for L. heteroclada f. decussata on the other hand supported its separation from L. heteroclada, with too great a molecular distance to be considered a variety. Morphological characters that best separated P. rigida from L. decussata included seven characters; number of pericentral cells per vegetative axial segment, the presence of secondary pit connections, the presence of lenticular thickenings, tetrasporangia alignment, the presence of corps en cerise, holdfast morphology, and overall plant shape. Morphologically, L. heteroclada f. decussata was also separated from L. heteroclada, particularly by the following characteristics; ultimate branchlets morphologies, lower order branch lengths, primary axis and holdfast morphologies. Therefore, it was proposed that L. heteroclada f. decussata is recognized at a species level as L. decussata comb. et stat. nov.

키워드

과제정보

This work was supported by the Australian Biological Resources Study (ABRS) under Grant RFL212-08, which funded a large portion of the field and molecular work. This study was also supported by the National Herbarium of NSW, Sydney, Australia. Thank you to J. Eu, P. Ogilvie, A. J. K. Millar, S. Skinner and D. Ghosn for assisting in collecting specimens. Thank you also to the reviewers of this manuscript for their detailed comments.

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