Two siphonous green algae were collected from the eastern coast of Korea. These species share the typical features of Derbesia sporophytes, such as erect and prostrate siphonous filaments and the presence of basal septum in lateral branches. One is characterized by the combined features of a relatively small tufted sporophytic thalli arising from a rhizoidal base, subdichotomously branched filaments with a basal septum and one pyrenoid per subspherical to lenticular chloroplast. The other shows a larger sporophytic thallus, sparsely subdichotomously branched filaments with a basal septum and one pyrenoid per spherical chloroplast. In a phylogenetic tree based on rbcL sequence, the two above-mentioned Korean algae nest in the same clades as Derbesia minima and D. indica, respectively. The genetic distance between the sequences within the clades was 0.5- 0.8%, which is considered to be included in the intra-specific range for the genus. These two siphonous Korean algae are identified as D. minima and D. indica, respectively, based on the morphological and molecular analyses. These species are newly recorded in the Korean marine algal flora herein.

국내 미기록종인 Corticaria elongata (Gyllenhal, 1827)는 딱정벌레목(Coleoptera), 섶벌레과(Lathridiidae)에 속하는 종으로 유럽과 북아프리카, 아프카니스탄, 네팔, 파키스탄, 터키, 인도, 러시아, 중국, 일본 등에 서식하고 있는 것으로 기록되어 있고 국내에는 전북 완주군에서 2015년 8월에 처음으로 채집되었다. 크기는 1.49mm이며 폭은 0.6mm이고, 높이는 0.34mm이다. 긴 타원형 모양이며 양쪽 측면은 평형에 가깝고, 등면은 적당히 솟아올랐다. 몸 색깔은 연한 갈색 혹은 짙은 노란색이고, 더듬이와 다리는 연한 노란색이다. 표피는 부드러운 털로 덮여있으며 털은 길고 기울어져있다.

While working on beetles collected by using flight interception trap, we found specimens possessing similar characters with salpingidine genus Lissodema Curtis. After detailed examination of the specimens and comparison with other Lissodema species, we concluded that these specimens represent a new species of the genus. The genus Lissodema was first proposed by Curtis based on Lissodema heyana Curtis and contains 19 species in the Palaearctic region. In eastern Asia, 14 and three species are recorded in Japan and Russian Far East, respectively, but no species have been reported from Korea. In this study, a description, habitus photographs and line drawings of diagnostic characters of a new species from Korea are provided.

A marine algal species belonging to Gigartinales was collected from Geoje, Korea. This shares the generic features of Ahnfeltiopsis, such as multiaxial thalli with a compact and pseudoparenchymatous medulla, densely cytoplasmic secondary medullary cells around immersed cystocarps with a carpostome, and is distinct from similar species within the genus by a combined feature of small (up to 4 cm tall) and tuft thalli, compressed to subcompressed branches except for ultimate branchlets and base of main axes, cartilaginous in texture, dichotomous branches, rarely produced proliferations, absence of hypha-like filament in the medulla and internal cystocarps with a carpostome. In phylogenetic tree based on rbcL sequence, the Korean species nests in the same clade with Ahnfeltiopsis linearis. The genetic distance between both sequences within the clade was 1.5%, considered to be within the intra-species range for the genus. This morphological and molecular evidence confirms the Korean alga to be identified as A. linearis originally described from California. This is the first record of A. linearis in Korea.

The continuous exploration in deep seawater from Korea makes us lead the discovery of ancient Chlorophyta, Palmophyllum, in the Korean coast. The phylogenetic analyses of 18S rRNA and rbcL genes demonstrate that our specimens are Palmophyllum crassum (Naccari) Rabenhorst, recorded in Japan and clearly distinguished from P. umbracola from New Zealand and California, USA. Palmophyllum crassum grows in the subtidal region, 8-30 m deep, and has a crustose thallus which is closely adherent to substrates such as non-geniculate crustose coralline algae, sponge, shells, or rocks. P. crassum is composed of numerous spherical cells embedded in the gelatinous matrix. The discovery of this ancient green seaweed implies that the Korean coast is one of the hotspots of algal species diversity and has the suitable marine environment for algal speciation. We suggest the grounds to conserve the Korean coast environmentally as the biodiversity center of marine species by studying the phylogeny of seaweeds.

The former Scelionidae (sensu stricto) is considered to be a part of Platygastridae, recently. During the parasitic wasp collecting with yellow pan trap, aiming at investigating promising biological control agents which attack on plantbug pests for soybean cultivation, one new species and one unrecorded scelionine species were identified. Opisthacantha albertoi sp. n. was collected from central part of korean peninsula. It is very unique by its yellowish body, compared with the black of the most recorded korean scelonine species. It has a long ovipositor which is 1.3 times longer than body length. It was named after the late Dr. S.-B. Ahn, the noctuid specialist. The unrecorded Tiphodytes gerriphagus (Marchal) was famous for its extremely extraordinary habit of diving for Hymenoptera to attack the eggs of gerrid hosts (Gerris, Trepobates spp.). It was collected nationwidely in Korea. As a result, two genera are newly added in korean scelionine fauna and korean Scelioninae is composed of eight species in five genera in total.

Three marine isopods, Symmius yamaguchiensis Shimomura, 2008, Colanthura pigmentata Kensley, 1980 and Synidotea nipponensis Nunomura, 1985 are reported for the first time in South Korea. The family Chaetiliidae, and genera Symmius and Colanthura are new to South Korea. We provide descriptions of the diagnostic characteristics, illustrations of three species and their partial sequences of the mitochondrial cytochrome c oxidase subunit 1 (CO1) for molecular characteristics.

Oncholaimid nematode, Oncholaimus secundicollis Shimada, Kajihara and Mawatari, 2009, is firstly reported based on a comparative morphological study. The present specimens of O. secundicollis are collected from rocky intertidal seagrass on the eastern coast of Korea. Oncholaimus secundicollis is distinguished from all of its congeners by the following combination of morphological characteristics: buccal cavity large with thick cuticular wall and three teeth, left subventral tooth larger than right subventral or dorsal teeth, and the presence of two remarkable precloacal papillae with nine pairs of cloacal setae and single ventral tail papilla with two pairs of short setae. In this study, we provide taxonomic description and illustration of unrecorded species of the genus Oncholaimus.

Three unrecorded species of free-living marine nematodes, belonging to genus Enoplus Dujardin, 1845 collected from rocky intertidal seagrass on the eastern coast of Korea, are described and illustrated. Enoplus taipingensis Zhang and Zhou, 2012 is characterized by longer body size, a series of lateral setae throughout the tail in male, the presence of trumpet-shaped precloacal supplement with well-dilated proximal end, and the presence of spicules with five to eight semicircular plates. Enoplus meridionalis Steiner, 1921 is characterized by the presence of trumpetshaped precloacal supplement with slightly dilated proximal end, paired massive spicules, and tail with two pairs of stout terminal setae. Enoplus mammillatus Timm, 1959 is easily distinguished from the congeners by narrow tubular-shaped precloacal supplement. In this study, we provide detailed morphological features of three Enoplus species by differential interference contrast microscopy and scanning electron microscopy. This is the first report on the species of the genus Enoplus from the Korean waters.

A new species of the genus Ebrechtella Dahl, Ebrechtella juwangensis n. sp. and the male of Ozyptila geumoensis Seo and Sohn, 1997 are reported new to science. Ozyptila utotchkini Marusik, 1990 is reported for the first time in Korea. Habitus photos and illustrations of these three species are provided.

울릉도 성인봉의 토양 시료에서 발견한 육각사다리응애 (신칭, Punctoribates hexagonus Brelese, 1908)를 국내에서 처음으로 보고한다. 이종의 형태적 특징을 기재하고 지리적 분포 정보를 제시한다.

A study on the indigenous diatoms was carried out at 103 sites during August 2008 to April 2011 from the marine and the brackish waters in Korea. A fine structure of small-sized diatoms was examined using a light and scanning electron microscopy. Sixty species of diatoms were newly identified and composed of 3 class, 6 subclass, 16 order, 21 family and 39 genus. The detailed nomenclatures, references, photographs and distributions were here reported. Of 60 species, the most frequent species was Tryblionella coarctata appearing 24 times, and 22 times followed by Thalassiosira lacustris, Cocconeis stauroneiformis was 20 times. In the level of genus, Chaetoceros, Parlibells and Thalassiosira were included 4 species, Actinocyclus, Minidiscus and Licmophora were included 3 species. This study will provide the knowledge of the diversity level of diatom in Korea, the knowledge is important on the diatoms for further studies.

This study treated the list and key to the 8 species of the subfamily Typhlodrominae from Korea including a newly recorded species, T. coryli Wu and Lan, 1991. This subfamily comprises four genera: Kuzinellus Wainstein, Paraseiulus Muma, Galendromus Muma, Typhlodromus Scheuten. Key characters of the genera in Typhlodrominae have been well known as the number and position of the dorsal setae. Therefore, Typhlodrominae was previously referred to one genus, Typhlodromus in Korea. However, the nominal species in the Phytoseiidae has increased in number exponentially more than 2,280 in the world today, so the current classification of the family is taken more genera by other characters, not only dorsal chaetotaxy but also the setation and the nature of the posterior margin of the sternal shield, the shape and setation of the ventrianal shield, setation of legs I-IV and the relative lengths of the setae Z4 and Z5. Thus, Korean Typhlodrominae includes four genera, Kuzinellus Wainstein, Paraseiulus Muma, Galendromus Muma and Typhlodromus Scheuten.

 ,  , The family Brachyceridae is reported for the first time in Korea and is represented by Desmodophorus hebes(Fabricius, 1781). A revised description, morphological photographs of adults, illustrations of genitalia, a key to the families of Korean Curculionoidea, and a key to the East Asian species of Desmidophorus are provided.

Dendrothripine thrips are distinguished from other members of Thripidae by a remarkably elongate, “lyre-shaped” metasternal endofurca. This furca extends to the mesothorax as a pair of sinusoidal curved spurs, providing the insertion points for powerful muscles arising from the hind legs of the salatatorial thrips. The subfamily Dendrothripinae, formerly known for a long time as the tribe Dendrothripini since Priesner (1925), was up-ranked to subfamily level of Thripidae by Bhatti (1989). Of the 97 species in 15 genera known worldwide, Dendrothrips minowai Priesner, 1935 and Pseudodendrothrips mori (Niwa, 1908) have been hitherto reported from Korea. In this study of the Korean Dendrothripinae, two species of genus Dendrothrips, D. ornatus (Jablonowski, 1894) and D. magnoliae Kudo, 1984, are found for the first time. However, D. minowai Priesner recorded by Woo (1974), is excluded from the Korean fauna because of misidentification as supposed by Kudo (1984). Morphological characters for identification of three species including P. mori previously recorded are described and figured with a key to Korean species of Dendrothripinae.

The genus Scolytus of the family Scolytidae comprises more than 120 species through the world. Fifteen species of the genus Scolytus are revised from Korean peninsula. The genus Scolytus can be distinguished from the other genera by combination of following characteristics: frons slightly concave or convex with vertical wrinkles; club longer than 7-segmented funicle; pronotum fairly large, shining, punctured, narrowed towards the front, turning into a more slight or distinct neck-like constriction; vicinity of scutellum deeply impressed; elytra flat with punctures densely or sparsely arranged in rows; abdominal sternites from 2nd to 5th obliquely, convexly, concavely or vertically ascendant and with or without process or tubercles at middle. Scolytus frontalis Blandford, 1894 is new record to Korea. This species was collected from living Zelkova tree, Zelkova serrata which were planted along the street. We provide the habitus of this species and its biological informations.

Metcalfa pruinosa (Say) (Hemiptera: Flatidae), the citrus flatid planthopper(CFP) is suddenly discovered this year in Seoul and Gyeonggi Province, Korea. CFP is originally distributed in the Eastern parts of North America(Metcalf and Bruner 1948), and recently spreading to European countries(Baker et al. 2008) such as northern Italy, Spain, and France. It is an economically important plant-sucking insect having wide host range including many agricultural crops such as grapefruit and citrus, and ornamental trees, camellias, azaleas, and magnolias(Dean and Bailey 1961) mediating plant viruses. We discovered large samples on Hosta longipes (Franch. & Sav.) Matsumura, Liriope platyphylla F.T.Wang & T.Tang, Weigela subsessilis L.H.Bailey, etc. in Seoul and Suwon on August 2009. In this report, we announce their taxonomic position, morphological characters, distribution, host information, and importance as a possible pest in the Korean peninsula.

Up to days, 15 species of the genus Xylotrechus, which have most diverse species among the tribe Clytini, have been recorded from Korean peninsula. The genus Xylotrechus can be distinguished from the other genera by combination of following characteristics: length of antennal socket longer than 1st segment of antenna; antennae reaches about 2/3 of elytra or less; carinae on frons well developed; 1st segment of hind tarsus 2 times longer than total length of 2nd+3rd segment; carinae on frons exceeding vertex; compound eye joined prothorax. In 2007, we collected a specimen which is belong to the genus Xylotrechus from Goyang-si, Gyeonggi province and we identified this specimen with Xylotrechus pavlovskii Plavilstshikov. Xylotrechus pavlovskii Plavilstshikov is easily distinguished from the congeneric species by following characteristics: femora black except basal half pale brown; antennal socket with yellow pubescence patch; pronotum black with distinct six yellow pubescence patches; elytra black with four pairs of yellowish linear pubescence patches except anterior 1/5 part reddish, apice blunt with inner and outer small sharpen projection. As a result of this study, we report this species for the first time from Korea with description and illustrations of diagnostic characters.

Apolygus xanthomelas Yasunaga and Yasunaga 2000 is reported from Korea for the first time. It is larger than other congeneric species from Korea and has characteristic V-shaped pale parts on hemelytra surrounded by entirely black clavus and posterior triangular marks of corium. It is similar in overall appearance to the Chinese congeneric species, A. ornatus (Zheng and Wang 1983), but it can be distinguished by the vesica, which has a long needle-shaped spicule reaching the apex of median sclerite and ventral sclerite, a slender and weak wing-shaped sclerite and a small sublateral sclerite. This species also distributes in Japan, but the Japanese population is a little different from that of Korea in usually having a pair of dark spots on calli. In this study, the detailed information is given with some photos of the male and female genitalia.