A marine red algal species was collected from Uljin, located on the eastern coast of Korea, during a survey of marine algal flora. This alga shares the generic features of Plocamium, and is characterized by linear, flat and thin thalli with narrow axes, branches developing in alternating pairs from margins of the axes, two to four times alternately pinnately branching, linear or occasionally adaxially curved lowermost branchlets and distinctly and compactly clustered stichidia. In a phylogenetic tree based on rbcL sequences, the Korean alga nests in the same clade as P. serrulatum. The genetic distance between both sequences within the clade was calculated as 0.0-0.2%. Based on the morphological and molecular data, this Korean species is identified as P. serrulatum described originally from Taiwan. This is the first record of P. serrulatum in Korean marine algal flora.

A marine green algal species (Chlorophyta) was collected from the eastern coast of Korea. It is morphologically characterized by monostromatic thallus, usually undulate and entire margins, cap-like chloroplast and several pyrenoids per cell. In a phylogenetic tree based on molecular data, the Korean alga nests in the same clade as Monostroma alittorale originally described from Japan, as a sister clade of M. grevillei from France. The genetic distance for ITS (Internal Transcribed Spacer) sequences among Monostroma species ranges from 2.3% to 38.2%. The value between the Korean entity and M. alittorale was calculated as 0.01%, considered to be intraspecific divergence. This Korean entity is identified as Monostroma alittorale based on morphological and molecular analyses. This is the first record of M. alittorale in Korea.

국내 금강수계의 하구역에 위치한 하제항 암벽으로부터 기중성 남세균이 채집되어, 단조류 배양되었다. 2개의 남세균 배양주로부터 형태적 형질과 TEM에 의한 세포 미세구조 특징을 관찰하였다. 또한 16S rDNA 염기서열을 규명하여 BLAST 검색, 염기서열 유사도, 유전거리 및 계통 분석을 실시하였다. 국내 배양주는 Wilmottia murrayi와 계통학적으로 동일한 clade를 형성하였고, 99% 이상의 유사도를 나타냈다. TEM을 통한 세포 미세구조는 틸라코이드가 여러겹으로 세포막 주변에 분포하는 특징을 나타냄으로써 Coleofasciculaceae과의 특징과 일치하였다. 이상의 결과를 통해 W. murrayi를 국내 미기록속 및 미기록종으로 보고하였다.

Cotesia Cameron is a cosmopolitan genus of the subfamily Microgastrinae. This genus comprises more than hundreds of species (Whitfield et al., 2009). The members of the genus Cotesia parasites on larvae of Macrolepidoptera: Noctuidae, Geometridae and Saturniidae (Achterberg & Polaszek, 1996; Whitfield et al., 2009). Previously, 33 Korean species of the genus have been investigated by several researchers (Kim, 1963; 1970; Ku et al., 2001; Papp, 1974; 1990; 2003). In this study, Cotesia urabae is reported for the first time from Korea. Diagnosis, distribution, and host information are provided.

The Pyraustinae is one of the large subfamily in Crambidae. In Korea, more than 60 species in 20 genera of the Pyraustinae have been reported. Recently, Demobotys pervulgalis (Hampson, 1913) and Ecpyrrhorrhoe dissimilis (Yamanaka, 1958) were recorded by Choi et al. (2015). Among of the Pyraustinae, the genera Callibotys and Sinibotys were established by Munroe and Mutuura (1969). In this study, we report two species of genera Callibotys and Sinibotys from Korea for the first time, with a newly recorded genus Callibotys. Illustrations of adults, male and female genitalia, description are provided.

Six taxa of unrecorded Korean species of charophytes are described. Freshwater and aerial charophytes were collected from the bark of trees, reservoirs, small ponds and swamps from April 2017 to September 2017. The newly recorded species of Korea were Cosmarium quadrifarium f. octastichum, Euastrum turneri, Spondylosium nitens var. triangulare, Staurastrum kouwetsii, Staurodesmus dickiei var. latus, and Klebsormidium subtile. K. subtile was transferred from Stichococcus subtilis.

In 2017, the freshwater algae were collected from reservoirs, small ponds, soil, and rocks in Korea. Eight taxa of Chlorophyta (Chlorophyceae and Trebouxiophyceae) have been newly reported in Korea. The unrecorded indigenous species were Chlorolobion braunii, Coelastrum pseudomicroporum, Coelastrum reticulatum var. cubanum, Monoraphidium nanum, Tetrachlorella incerta, Ecdysichlamys obliqua, Gloeotila scopulina, and Stichococcus jenerensis.

Phytoplanktons were collected from various environments including small marshes, small ponds, reservoirs and brackish water from March 2017 to November 2017. In this study, five species of family Scenedesmaceae were newly recorded in Korea. The genus Desmodesmus was newly reported in Korea. The newly recorded species are Scenedesmus nanus, S. praetervisus, Desmodesmus costato-granulatus, D. lunatus and D. spinulatus. S. nanus and S. praetervisus are known to occur in freshwater, but they were found in the brackish water in this study.

금번 연구를 통해 작은검정주머니나방속이 국내에서 처음 발견되어 보고한다. 작은검정주머니나방속 내 작은날개검정주머니나방에 대한 암컷 형태 특징, 채집지 정보 등을 포함한 이용가능한 모든 정보를 제공하였다. 또한 신속한 종 동정을 위한 DNA 바코드 정보를 작성하였다.

The genus Centistes Haliday is a cosmopolitan group, comprising 89 species (Yu et al., 2016; Aguirre et al., 2017). Among them 41 species have been known from the East Palaearctic region (Yu et al., 2016). Centistes are known to be solitary koinobiont endoparasitoids of final instar larvae (rarely) and Coleopteran adults, particularly the families Anthicidae, Carabidae, Chrysomelidae, Coccinellidae, Curculionidae, and Staphylinidae (Loan, 1964; 1972; Shaw, 1985; Chen and Achterberg, 1997). Previously, 16 Korean species of the genus have been investigated by several researchers (Papp, 1994; Belokobylskij, 2000a; 200b; Ku et al., 2001; Lee et al., 2016). In this study, two species of Centistes are reported for the first time from Korea: Centistes minutus Chen & Achterberg, C. sylvicola Belokobylskij. Diagnosis and photographs are provided for each species.

A marine brown alga was collected from Geoje, located on the southern coast of Korea. This species shares the generic features of Dictyota and is morphologically characterized by the combined features of erect or prostrate thallus with smooth margin, dichotomous to subdichotomous branches not twisted at the terminal part, absence of surface proliferations, 1-3 cell layered cortex and unilayered medulla, and lack of involucrum in sporangia subtended by a single stalk cell. In a phylogenetic tree based on rbcL sequences, this species nests in the same clade with Dictyota bartayresiana. The genetic distance between both sequences within the clade was calculated as 1.2%, considered to be within the intra-species range for the genus. Based on these morphological and molecular analyses, this Korean alga is identified as D. bartayresiana described originally from the West Indies. This is the first record of D. bartayresiana in Korea.

To find unrecorded diatom species in the Nakdong River Estuary and Yeongil Bay, bottom sediments in the estuary, and seagrasses in the bay were collected from 12 sampling sites. Eighteen species and four genera are added to the national flora of diatom as newly recorded one. In the Nakdong River Estuary, twelve species are new records to Korea, Martyana atomus (Hustedt) Snoeijs, Pseudostaurosira perminuta (Grunow) Sabbe & Vyverman, Trachysphenia acuminata M. Peragallo, Trachysphenia australis Petit, Fallacia clipeiformis (König) D.G. Mann, Amphora graeffeana Hendey, Amphora jostesorum Witkowski, Metzeltin & Lange-Bertalot, Amphora ostrearia var. vitrea (Cleve) Cleve, Amphora wisei (Salah) Simonsen, Halamphora eunotia (Cleve) Levkov, Halamphora lineata (Gregory) Levkov, Nitzschia littorea Grunow. In Yeongil Bay, four species are added as new, Licmophora gracilis var. anglica (Kützing) H. Peragallo & M. Peragallo, Tabularia investiens (W. Smith) Williams & Round, Nitzschia composita Giffen, Nagumoea neritica Witkowski & Kociolek. Two species occurred simultaneously in both regions, Fragilaria cassubica Witkowski & Lange-Bertalot and Hyalinella lateripunctata Witkowski et al.

본 연구를 통해 Spathius속의 Spathius depressithorax Belokobylskij, 1998 <납작가슴자루배고치벌 (신칭)>를 우리나라에서는 처음으로 보 고한다. 본 종의 식별형질과 성충을 검경하고 도해하였으며, 한국산 Spathius속의 목록을 제시한다.