Ivana Karanovic

Hanyang University · Department of Life Science

Ostracod shells are used extensively in paleontology, but we know little about their evolution, especially in ancient lakes. Lake Baikal (LB) is the world’s most important stronghold of Candonidae diversity. These crustaceans radiated here rapidly (12–5 Ma) and with an unprecedented morphological diversity. We reconstruct their molecular phylogeny...

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 mo...

Two new Uromunna species, Uromunna mundongensis sp. n. and Uromunna jejuensis sp. n., are described from the Korean Peninsula, representing the first record of the genus in Korean waters. Genetic analyses using two mitochondrial (COI, Cytb) and one ribosomal (18S rRNA) gene allowed us to confirm high pair-wise interspecific differences with the est...

Ostracod shells are used extensively in paleontology, but we know little about their evolution, especially in ancient lakes. Lake Baikal (LB) is the world’s most important stronghold of Candonidae diversity. These crustaceans radiated here rapidly (12-5 Ma) and with an unprecedented morphological diversity. We reconstruct their molecular phylogeny...

The genus Semicytherura Wagner, 1957 has nearly 300 species, is common in shallow and marginal marine habitats, and has a worldwide distribution. It is divided into several species groups, of which the Semicytherura henryhowei Hanai & Ikeya, 1977 group is one of the most frequently recorded in temperate Asia. A previous study indicated that many of...

Parasterope Kornicker, 1975 is a marine ostracod genus with 49 species described so far, which makes it the most diverse representative of the subfamily Cylindroleberidinae, as well as the entire family Cylindroleberididae. Despite its global distribution no species are reported from South Korea. Three new species collected from the Korean coast of...

The biological traits of invertebrates inhabiting freshwater methane seeps are poorly understood. We analysed the relationship between invertebrate abundance and environmental factors such as methane concentration, location of gas hydrates in sediments, sediment composition, and the total number of microorganisms (TNMs), including methanotrophs. Th...

Cylindroleberididae is a peculiar ostracod myodocopid family, characterized by the presence of gills. It accounts for over 200 species described from all bathymetric ranges and from all the world’s oceans. Nevertheless, its biodiversity is still underestimated, with each study brining new taxa to the list. As a result of recent sampling effort in s...

For the first time, soft body parts of ostracod genera, Nipponocythere Ishizaki, 1971 from the family Loxoconchidae and Ambtonia Malz, 1982 from the family Trachyleberididae, both belonging to the superfamily Cytheroidea, are described and illustrated. The specimens are male representatives of the species Nipponocythere bicarinata (Brady, 1880) and...

Keysercythere reticulata sp. nov. and Redekea abyssalis sp. nov. , collected from the wood fall submerged in the Kuril-Kamchatka Trench (Northwestern Pacific), are only the second records of the naturally occurring, wood-associated ostracod fauna from a depth of over 5000 m. At the same time, K. reticulata is the second and R. abyssalis is the thir...

Cryptic species are a biological phenomenon only recently recognized due to progress in molecular studies. They pose a significant challenge to conventional taxonomic work since these species manifest low morphological differences, but considerable genetic disparity. New taxonomic methods are in development but have yet to be tested for many animal...

Two new planktonic ostracods of the genus Proceroecia Kock, 1992, P. hwanghaensis sp. nov. and P. joseondonghaensis sp. nov., collected from neritic waters off the south coast of South Korea are described. Morphologically, they are similar to P. microprocera (Angel, 1971), the type species of the genus, but show several clear morphological differen...

Cytherois gajinensissp. nov. is described and Violacytherois sargassicola (Hiruta, 1976) is redescribed. The species have been collected from littoral and interstitial waters in South Korea. They belong to Cytheroisinae, one of the three Paradoxostomatidae subfamilies. Both species are the first taxonomic records of the subfamily in Korea. Taxonomi...

Ostracod genus Heterodesmus Brady, 1866 is known thus far to contain only three species: H. adamsii Brady, 1866; H. apriculus Hiruta, 1992; and H. naviformis (Poulsen, 1962). This genus has been recorded from the Sea of Japan, and the coastal areas of Thailand and Vietnam. The main generic character is the presence of antero-dorsal and postero-dors...

Pontocyprididae is a diverse ostracod family with over 300 species described so far. It has a worldwide distribution in various marine ecosystems. I describe two new species belonging to Ekpontocypris Maddocks, 1969 and Schedopontocypris Maddocks, 1969. They have been collected from shallow littoral and interstitial waters from the east coast of Ko...

Ostracod crustaceans are among the most abundant microfossil animals. Understanding intra-and in-terspecific 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...

Living cytheroid ostracod fauna from South Korea is very poorly known, and so far only 12 species have been reported in the taxonomic literature with detail description. We describe one new species, Xestoleberis hujeongensis n. sp., and report three other cytheroid ostracods: X. setouchiensisOkubo, 1979; X. sagamiensis Okubo, 1976; and Hemicytherur...

Hadal depths are one of the least explored ecosystems on the planet, with little data on biodiversity and even less on phylogegraphy of its inhabitants, especially of meiofaunal groups. Ostracods are an important component of meiofaunal communities, but with less than a dozen species described from the world’s ocean trenches. Therefore, six species...

A new interstitial species, Caecianiropsisgoseongensissp. n. is described from littoral off the east coast of Korea (Sea of Japan). The species can be distinguished from its congeners by the number of antennular articles, shape of the male appendix masculina, setation of pereopods, and length ratio of the uropodal rami. To aid species identificatio...

We combine geometric morphometric and molecular data to study shell shape changes in eurybathic ostracod Polycope pseudoinornata Chavtur, 1983 and discuss its occurrence in relation to environmental variables (of the sediment and deep water masses). Pairwise distances between 50 mitochondrial COI sequences indicate that populations from five sample...

Research Infrastructures (RIs) are facilities, resources and services used by the scientific community to conduct research and foster innovation. LifeWatch ERIC has developed various virtual research environments, which include many virtual laboratories (vLabs) offering high computational capacity and comprehensive collaborative platforms that supp...

Coxicerberus fukudai (Ito, 1974) (Isopoda) is redescribed from Korean and Japanese localities. Molecular analysis based on two mitochondrial markers (mtCOI and Cytb) of the studied populations shows two diverged lineages, reflected in high (10.5% and 9.5%) pairwise differences and high haplotype diversity. One of the clades is shared by Korean and...

The Australian Candonidae ostracod fauna has few surface water representatives, despite Australia being one of the principal centers of Candonidae biodiversity. The majority of Australian species live in subterranean waters, with most genera and one tribe being endemic to the continent. Species in Australia show Tethyan and Gondwana connections, wi...

This study describes a new species of cytheroid ostracod, Paradoxostoma koreana sp. nov., collected in Korea. In addition, three other cytheroid ostracods, P. setoense Schornikov, 1975, Loxoconcha pulchra Ishizaki, 1968, and Ishizakiella miurensis (Hanai, 1957), are reported with brief descriptions and images. Paradoxostoma setoense and L. pulchra...

With 104 endemic species family Candonidae is one of the most diverse crustacean groups in Lake Baikal, yet their phylogenetic relationships and position in the family have not been addressed so far. Here, we study the phylogenetic position of Baikal candonids within the family and their evolutionary history using molecular markers for the first ti...

Citation: Karanovic I, Sitnikova TY (2017) Morphological and molecular diversity of Lake Baikal candonid ostracods, with description of a new genus. ZooKeys 684: 19–56. https://doi. Abstract Uncoupling between molecular and morphological evolution is common in many animal and plant line-ages. This is especially frequent among groups living in ancie...

Locality data and BenBank Accession Numbers

p-distances between 18S rRNA sequences

p-distances between 28S rRNA sequences, df region

p-distances between 28S rRNA sequences, vx region

p-distances between 28S rRNA sequences, em region

p-distances between 16S rRNA sequences

p-distances between COI sequences

[This corrects the article DOI: 10.3897/zookeys.680.12048.].

A new species of Microcharon Karaman, 1934 (Asellota: Lepidocharontidae) is described from Miho-Uchihama beach, Shizuoka, Japan. Microcharon tanakai sp. n. differs from its congeners by having nine simple, five penicillate setae on antennal article 6; one simple distal seta on article 1 of the mandibular palp and having the apical lobe of male pleo...

Pores and sensilla on ostracod shell have often been used in studies of ontogeny, taxonomy, and phylogeny of the group. However, an analysis of sexual dimorphism and variation between valves in the number and distribution of pores is lacking. Also, such studies have never been done on a widely distributed, morphologically variable, and weakly ornam...

Family Candonidae is one of the most diverse freshwater ostracod groups in terms of number of taxa and ecological adaptations. The family is especially well represented in the subterranean waters around the world, with many species being short-range endemics. Here we describe four new species, Undulacandona koreanasp. nov., U. aeolussp. nov., U. an...

Manuelcypris n. gen., along with two species M. chetumalensis n. sp. and M. tabascena n. sp., are described from Southern Mexico. Another three species are transferred into the new genus: M. cisternina (Furtos, 1936) comb. nov., known from the Yucatan Peninsula, was originally described in the genus Eucypris Vávra, 1891, while M. punctata (Keyser,...

With almost 200 species described from all over the world, Polycope Sars, 1866 is the most specious and eurytopic genus of the exclusively marine family Polycopidae. Unlike other members of the subclass Myodocopa, polycopids are commonly found in fossiliferous rocks from strata as old as the Carboniferous, which makes them a useful tool in palaeoen...

The ostracod genera Parapolycope Klie, 1939 and Kliecope Tanaka, Tsukagoshi & Karanovic, 2014 have a sexually dimorphic upper lip, and males use their lip during courtship. Here we study the male upper lip of 14 species in order to find homologous structures. For this purpose, the lip is divided into six homologous parts, determined by their relati...

The common ostracod genus Echinocythereis has a worldwide and eurybathic distribution, but in Recent sediments , it is more common in cold waters. Its oldest record, dating from the Cretaceous, indicates that the genus should be very useful in stratigraphical and palaeoecological studies, but the taxonomy of Echinocythereis is very complex and incl...

The East China Sea is part of the Warm Temperate Northwest Pacific zoogeographic province and, as such, has a high biodiversity and many tropical and subtropical biotic elements. Nevertheless, many invertebrate groups from this area remain poorly studied. Ostracods are one of them, especially those belonging to the subclass Myodocopa. In this paper...

Ostracods are drastically reduced crustaceans, with never more than eight appendages enclosed between two valves, leaving only a limited number of morphological characters for species delineation. Conservative morphology of characters used to define genera, along with high variability of characters used to define species are creating problems in ap...

Candoninae is by far the most diverse ostracod group in subterranean habitats, with many genera which today have no surface water representatives. This subfamily is also peculiar because species tend to have restricted distributions regardless of habitat type, and, unlike other non-marine ostracod lineages, extremely rarely reproduce parthenogeneti...

A new species of the genus Chrissia Hartmann, 1957 is described from Dongqian Lake, East China. Chrissia dongqianhuensis n. sp. is characterized by short swimming setae on the second antenna. This character state is very rare in the genus, and besides the new species the feature is found only in Chrissia ceylonica (Daday, 1898). The two species can...

Family Polycopidae is one of the more abundant and diverse taxa occurring in marine interstitial environments. Most of the interstitial polycopids are so far known from Japan and belong to the genus Parapolycope Klie, 1936. In this paper we describe another four new species from Japan. A new genus, Kliecope gen. nov. is erected to include one new s...

Three species of the genus Paradoxostoma Fischer, 1855 are reported from the South Korean East Coast: Paradoxostoma flaccidum Schornikov, 1975, P. brunneum Schornikov, 1974, and one new species, P. sokchoensis, new species. The first species was previously reported from the East Sea off the Korean peninsula, with additional Paradoxostoma as part of...

Limnocytherina is a genus conformed by 12 species; its distribution in the American continent is known to be exclusively on the North (neartics), but little is reported about its distribution from Mexico (transition zone) and Central America (Neotropics). Different sampling campaigns were undertaken in three crater lakes from the Axalapascos region...