Systematics and molecular phylogeny of Cylindrolebrididae (Ostracoda, Myodocopa) from East Asia|RISS 상세보기

다국어 초록 (Multilingual Abstract)

While extensive studies have been conducted worldwide on the
Cylindroleberididae, they still remain classified as unexplored taxa in East Asia. Compared
to the total of 229 species belonging to 33 genera recorded worldwide, only a small fraction
of that (26 species) has been recorded from East Asia and none from Korea. For this Ph.D.
thesis, 22 sampling sites from South Korean and Japanese waters were surveyed as a part
of the national project “Discovery of Korean Indigenous Species”, Japanese Association
for Marine Biology (JAMBIO) projects, and the training and research vessel (TRV)
Toyoshio-maru (Hiroshima University). As a result, collected cylindroleberids were
examined and identified to genus and/or species level. A total of 22 cylindroleberid species
belonging to 2 subfamilies, 11 genera were recorded. One new genus, Toyoshioleberis
Pham, Jöst, and Karanovic, 2021, four new Parasterope Kornicker, 1975 species, three new
Xenoleberis Kornicker, 1994 species are described. In addition, I re-describe Xenoleberis
yamadai Hiruta, 1979 previously unrecorded from South Korea. An identification key to
all representatives of Xenoleberis and the East and Southeast Asian Parasterope are
provided. A total of 859 sequences belonging to 228 Myodocopa species have been used
for the calculations of the genetic distances. As a result, an overview of the intrageneric
and intrafamily DNA distances of two mitochondrial markers (16S rRNA and mtCOI) and
three nuclear markers (18S rRNA, 28S rRNA, and internal transcribed spacer - ITS) is
provided. A concatenated alignment of 16S and 18S of all available cylindroleberid
sequences is used to reconstruct a phylogenetic tree with the aim to assess the position of
the new taxa within the family and resolve the currently polyphyletic nature of some
cylindroleberid systematic units.

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국문 초록 (Abstract)

Cylindroleberididae 과에 대한 연구는 전 세계에서 광범위하게 수행되었지만 동아시아와 한국에서는 부족한 상황이다. 현재까지 전 세계적으로 보고된 종은 33 속 229 종이고, 동아시아에서 보고한 종은 25 종이다. 국내에서 보고된 종은 아직 없었다. 본 학위논문을 준비하기 위해 국책과제인 “자생생물 조사∙발굴 연구 무척추동물분야”, 일본해양생물학회(JAMBIO) 사업, 연구선(TRV) Toyoshio-maru (Hiroshima University)에서 2014 년부터 한일수역 총 22 개 장소에서 조사를 하였거나, 시료를 제공받았다. 확보한 cylindroleberids 를 분석한 결과 총 2 아과 11 속 22 종으로 구분하였으며, 신속, 신종 미기록종을 보고하였다: 신속 Toyoshioleberis Pham, Jöst, and Karanovic, 2021; Parasterope Kornicker, 1975 에 속하는 4 신종, Xenoleberis Kornicker, 1994 에 포함되는 3 신종. 그리고 Cylindroleberidinae 아과에 속하는 미기록종인 Xenoleberis yamadai Hiruta, 1979 를 고해상도 삽화와 함께 재기재 하였다. 게다가, 동아시아 남아시아에 서식하는 Xenoleberis 와 Parasterope 의 동정 분류키를 함께 제공하였다. 근병아강에(Myodocopa) 속하는 228 종의 총 859 개의 염기서열을 유전적 거리 계산에 사용하였다. 그 결과 2 개의 미토콘드리아 마커(16S rRNA 및 mtCOI)와 3 개의 핵 영역 마커(18S, 28S rRNA, 내부 전사된 Spacer - ITS)의 속(genus), 과(family) 내의 DNA 거리에 대한 개요를 제공하였다. 그리고, 사용 가능한 모든 cylindroleberids 의 16S, 18S 정렬된 염기서열을 이용 분자계통수를 재구성하여 과내 새로운 분류군의 위치를 평가하고 일부 cylindroleberids 의 다계통 특성을 해결하였다.

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Cylindroleberididae 과에 대한 연구는 전 세계에서 광범위하게 수행되었지만 동아시아와 한국에서는 부족한 상황이다. 현재까지 전 세계적으로 보고된 종은 33 속 229 종이고, 동아시아에서 보고...

목차 (Table of Contents)

Chapter I General introduction to Cylindroleberididae and a review of the current knowledge of genetic markers used in myodocopid phylogeny. 1
I-1. Literature review and research gap. 1
I-1.1. General introduction to Ostracoda. 1
I-1.2. General introduction to Cylindroleberididae. 3
I-2. Current systematic. 17

Chapter I General introduction to Cylindroleberididae and a review of the current knowledge of genetic markers used in myodocopid phylogeny. 1
I-1. Literature review and research gap. 1
I-1.1. General introduction to Ostracoda. 1
I-1.2. General introduction to Cylindroleberididae. 3
I-2. Current systematic. 17
I-2.1. History of classification. 17
I -2.2. Current taxonomic research on East Asia Cylindroleberididae. 20
I-2.3. Phylogeny of Cylindroleberididae. 22
I-3. Current knowledge on common genetic markers used in phylogenetic studies of Myodocopa 22
Chapter II Materials and methods. 27
II-1. Sampling methods and taxonomy. 27
II-2. Molecular data analysis. 30
Chapter III Records of Cylindroleberididae from East Asia . 33
Chapter IV Molecular distances in Myodocopa and phylogeny of Cylindroleberididae 46
IV-1. Molecular distances in Myodocopa. 46
IV-2. Phylogeny of Cylindroleberididae. 51
Chapter V Descriptions of new cylindroleberid ostracods from East Asia. 54
V-1. Descriptions of four new Parasterope Kornicker, 1975 species. 54
V-2. Descriptions of three new Xenoleberis Kornicker, 1994 species and one new genus, Toyoshioleberis Pham, Jöst, and Karanovic, 2021 78
Chapter VI Discussion. 102
References. 108
국문 초록. 143

참고문헌 (Reference)

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