First record of Ishizakiella supralittoralis (Ostracoda, Cytheroidea, Leptocytheridae) from South Korea with a key to species of the genus

Yoo, Hyunsu; Karanovic, Ivana; Lee, Wonchoel

doi:10.12651/jsr.2012.1.1.068

Cited by 4 publications

(5 citation statements)

References 7 publications

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“…This species was recently reported from coastal rockpools near Busan, South Korea (Yoo et al 2012). Other localities include the Kuril Islands (Schornikov 1974) and Japan (Tsukagoshi 1994;Yamaguchi 2000;Smith and Kamiya 2003).…”

Section: Remarksmentioning

confidence: 81%

Nonmarine Ostracoda (Crustacea) from Jeju Island, South Korea, including descriptions of two new species

Smith

Lee

Chang

2014

Journal of Natural History

614

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Section: Remarksmentioning

confidence: 81%

Nonmarine Ostracoda (Crustacea) from Jeju Island, South Korea, including descriptions of two new species

Smith

Lee

Chang

2014

Journal of Natural History

614

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“…Such a wide distribution, especially of the cytheroid ostracods, seems to be relatively common (Brandão and Päplow 2011;Brandão and Karanovic 2015). For example, Yamaguchi (2000) examined the wide distribution of the genus Ishizakiella McKenzie & Sudijono, 1981, which has one species living in New Zealand and three in Japan and Korea (see Yoo et al 2012), and suggested that the ancestor of the Japanese species colonized the islands before the Pleistocene glaciation, and subsequently diverged there. Tanaka et al (2018) showed that some ostracod species endemic to Japan were transported across the Pacific on the tsunami debris from the 2011 earthquake.…”

Section: Discussionmentioning

confidence: 99%

Three Loxocaudinae species (Ostracoda, Podocopida) from South Korea

Yoo¹,

Huyền²,

Chae³

et al. 2023

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For many ostracod groups in Korea, published records are missing or are very limited. Loxocaudinae is one such subfamily, with only one named species, Loxocauda orientalis Schornikov, 2011 reported from Korea. Having fewer than 50 species, this subfamily can be considered a small ostracod group, with most of the species known only by their shell morphology. The diagnoses of genera are based on the shell characters that are often homoplastic, and soft body appendages that are difficult to observe, such as the mandibular exopodite. Because of this, the validity of the entire subfamily and some of its genera have been questioned. Here three Loxocaudinae species were collected from the marine macrobenthic assemblages from Korea. Two are new and belong to the genus Glacioloxoconcha Hartmann, 1990, previously known only from Antarctica: Glacioloxoconcha jeongokensissp. nov. and Glacioloxoconcha jisepoensissp. nov.Loxocauda orientalis is briefly redescribed, with some of the populations having unusual morphological features. COI and 18S rRNA sequences of all three species are provided and the latter marker used to assess the position of the subfamily within the family Loxoconchidae and the superfamily Cytheroidea. The resulting tree shows that within the family Loxoconchidae, the genera Glacioloxoconcha and Loxocauda Schornikov, 1969 are the most closely related, with very shallow but well-supported branches. Polyphyletic and paraphyletic natures of several Cytheroidea families are discussed, inferred from the reconstructed phylogeny.

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“…Scanning Electron Micrographs (SEM) were taken with a Hitachi S-4700 scanning electron microscope at Eulji University (Seoul). Species identification was carried out with the aid of the taxonomic key provided by Yoo et al (2012) Figure 1 Biogeography and molecular phylogeny of Ishizakiella miurensis (Hanai, 1957) and I. occidentalis sp.…”

Section: Collecting and Taxonomic Methodsmentioning

confidence: 99%

“…Ishizakiella miurensis (Hanai, 1957) is a brackish water species, living on muddy sand of river mouths in Japan (Hanai, 1957;Tsukagoshi, 1994;Yamaguchi, 2000) and Korea (Smith et al, 2014;Karanovic et al, 2017). The genus Ishizakiella McKenzie & Sudijono, 1981 accounts for six species, two of them known from the fossil (Yoo et al, 2012). Of the four living species, I. novaezealandica (Hartmann, 1982) is known from New Zealand, while the other three (I. miurensis, I. ryukyuensis Tsukagoshi, 1994, andI.…”

Section: Introductionmentioning

confidence: 99%

“…supralitoralis (Schornikov, 1974)) have been reported from East Asia only. Yoo et al (2012) provided a taxonomic key to species, and while there are sufficient morphological differences in their shell to distinguish fossil and recent species, major differences between living species are in the appendages, especially in the male copulatory organ. All living species have similar ecology to I. miurensis (see Tsukagoshi, 1994), with ovoviviparous mode of brood care, and no planktonic stages (see Yamaguchi, 2000Yamaguchi, , 2003.…”

Section: Introductionmentioning

confidence: 99%

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Shell and appendages variability in two allopatric ostracod species seen through the light of molecular data

Karanovic

Huyền

Yoo³

et al. 2020

Contrib. Zool.

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Ostracod crustaceans are among the most abundant microfossil animals. Understanding intra- and interspecific variability of their shell is of pivotal importance for the interpretation of paleontological data. In comparison to appendages, ostracod shell displays more intraspecific variability (in shape, size, and ornamentation), often as a response to environmental conditions. Shell variability has been studied with sophisticated methods, such as geometric morphometrics (GM), but the conspecificity of examined specimens and populations was never tested. In addition, there are no GM studies of appendages. We build on previously published high cytochrome c oxidase subunit I (COI) divergence rates among populations of a brackish water species, Ishizakiella miurensis (Hanai, 1957). With landmark-based GM analyses of its shell and appendages, and additional genetic markers (ITS, 28S, 18S), we test if the genetic variability is structured in morphospace. This approach is the core of integrative taxonomy paradigm which has been proposed to bring the gap between traditional taxonomy and other disciplines such as evolutionary biology. The results show that it is the shell shape, and not the shape of appendages, that mirrors the molecular phylogeny, and we describe a new species. Our results suggest that the landmark-based GM studies may be useful in paleontological datasets for closely related species delineation. We implement molecular clock and population statistics to discuss speciation processes and phylogeography of the two congeners in Korea and Japan.

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First record of Ishizakiella supralittoralis (Ostracoda, Cytheroidea, Leptocytheridae) from South Korea with a key to species of the genus

Cited by 4 publications

References 7 publications

Nonmarine Ostracoda (Crustacea) from Jeju Island, South Korea, including descriptions of two new species

Nonmarine Ostracoda (Crustacea) from Jeju Island, South Korea, including descriptions of two new species

Three Loxocaudinae species (Ostracoda, Podocopida) from South Korea

Shell and appendages variability in two allopatric ostracod species seen through the light of molecular data

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First record of Ishizakiella supralittoralis (Ostracoda, Cytheroidea, Leptocytheridae) from South Korea with a key to species of the genus

Cited by 4 publications

References 7 publications

Nonmarine Ostracoda (Crustacea) from Jeju Island, South Korea, including descriptions of two new species

Nonmarine Ostracoda (Crustacea) from Jeju Island, South Korea, including descriptions of two new species

﻿Three Loxocaudinae species (Ostracoda, Podocopida) from South Korea

Shell and appendages variability in two allopatric ostracod species seen through the light of molecular data

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Three Loxocaudinae species (Ostracoda, Podocopida) from South Korea