During a recent study to understand an interaction of Collembola community and their environmental factors, two species in the genus Folsomia, F. quadrioculata Tullberg 1871 and F. octoculata Handschin 1925, were found in the forest of South Korea. From 2013 to 2015, these two species were sampled from six mountains and F. quadrioculata or F. octoculata was the dominant species in 5 sampling sites among 6 sampling sites. F. quadriocualta and F. octoculata were found in litter of deciduous and pine forest, respectively. Therefore, the major tree species seems to be one of the important factors determining their habitat. F. quadiroculata is newly recorded from the Korean Peninsula and F. octoculata is redescribed based on new materials from South Korea.

한국에서 Macropogon sibiricus Motschulsky 옛방아벌레(신칭)를 근거로 하여 옛방아벌레과(Artematopodidae) (신칭)가 분포함을 보고 한다. 이 과 및 속, 종에 대한 진단형질과 사진을 포함하여 분류학적 정보를 제공한다.

In Korea, species of the genus Ptecticus Loew, 1855 (Family Stratiomyidae) have been known as three species, P. aurifer (Walker, 1854), P. matsumurae Lindner, 1936 and P. japonicus (Thunberg, 1789) (= P. tenebrifer (Walker, 1849)). Additionally, an unrecorded species, P. sinchangensis Ôuchi, 1938, is founded in South Korea. We therefore report the species for the first time in Korea with morphological diagnoses and key for the identification of species of the genus. In total, the members of the genus Ptecticus are officially recognized as four species in Korea.

The earwig Proreus simulans (Stål, 1860) is newly reported from southern parts of Korean Peninsula. The natural photos were taken from Gwangyang for the first time in 2013, at last the voucher specimens are collected by light trap from Suncheon in 2018. The species widely distributes throughout the Oriental Region, prefers to live in lowland paddy fields, frequently hides inside grass leaves, so regarded as an important predator of leaf folders on rice, or natural enemy of corn borer. The earwig belongs to Chelisochidae which is also newly recognized family in Korea. The order Dermaptera diversity of Korea is estimated that about 24 species 14 genera 6 families until now.

Epyris Westwood, 1832 is the largest genus of Bethylidae with more than 300 nominal species and 19 species of Epyris have been recorded in Korea. The Epyris species are small to medium sized (2–10 mm) wasps with the palpal formula 6:3; the median lateral clypeal lobe reduced; pronotum usually longer than wide; notauli and parapsidal furrows present; scutellar pits not connected by a groove; basal vein of the fore wing arising almost at apex of subcostal vein. As results of taxonomic studies on Korean bethylids, Epyris emiae Terayama, a brachypterous species, is first discovered from South Korea. In this presentation, a diagnosis, figures of diagnostic characteristics of E. emiae are provided with a discussion on forewing veins of Korean bethylid genera.

One species of the genus Aphidius (Hymenoptera: Braconidae: Aphidinae) is recognized in this study. The genus Aphidius is a large braconid group distributed in the European, Palaearctic and Oriental regions, which includes currently 61 species in South Korea. This genus mainly parasitizes aphids. In this study, Aphidius transcaspicus Telenga, 1958 is recognized for the first time in South Korea. Historically, Aphidius transcaspicus is complexed with Aphidius collemani species complex. Descriptions, diagnosis distribution and illustration are provided.

The morphology, anatomy and reproduction (tetra/bisporic and male) of Lithothamnion japonicum Foslie was studied, using holotype material and materials collected from Korea. Lithothamnion japonicum is characterized based on the presence of encrusting, warty to fruticose thallus, branched or unbranched short and cylindrical protuberances, conical shaped spermatangial conceptacles, branched (dendroid) spermatangial systems formed on floor, walls, and roof of conceptacle chamber, cylindrical shaped spermatangial conceptacle canal, 9-10 cell layered spermatangial conceptacle roof, raised tetra/bisporangial conceptacles without rims, flattened tetra/ bisporangial conceptacle pore plate, 16-50 pores on each pore plate, 6-8 rosette cells surrounded by each pore, pore canal lining filaments composed of tetra/bisporangial conceptacle roof, and buried senescent tetra/bisporangial conceptacles completely infilled with relatively large and irregularly arranged calcified sterile cells. In this study, we report a new record of Lithothamnion japonicum from Korean coasts.

A marine algal species was collected from Sacheonjin, Gangneung located on the eastern coast of Korea during a survey of marine algal flora. This alga shares the generic features of Membranoptera belonging to the subfamily Delesserioideae and is characterized by the presence of combined features of membranous, monostromatic thalli attached by a solid discoid holdfast, blades with a conspicuous terete stipe-like midrib and microscopic lateral veins, entire margins, irregularly alternate to dichotomous branching, and obtuse apices growing apically. In a phylogenetic tree based on rbcL sequences, the Korean alga nests in the same clade with M. alata from the eastern North Atlantic. The genetic distance between both the sequences within the clade was calculated as 0.0%. Based on the morphological and molecular analyses, this Korean species is identified as the generic type, M. alata. This is the first record in the list of Korean marine algal flora.

중기문응애목 떠돌이응애과는 토양에 서식하는 포식성 응애로, 토양해충의 생물적 방제원으로 이용가치가 있다. 우리나라의 떠돌이응애과는 10속, 24종이 보고 되었다. 본 연구는 제주도 한라산천연보호구역 물장오리오름에서 토양응애 생물다양성 연구 중 이끼에서 우리나라 미기록종 Asca bicornis Canestrini & Fanzago, 1877을 발견하여 보고하는 바이다. 등판과 배판의 묘사를 통해서 형태적인 특징을 자세히 제공하였다. 근연 종인 A. aphidioides는 등판 양쪽 말단에 돌출된 혹에서 각 1개의 센털이 있으나, A. bicornis는 2개가 나 있다.

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.

Mites in the family Ascidae are predacious soil dwellers with potential of biological control of soil insect pests. The family Ascidae is comprised of 10 genera with 12 species recorded in Korea. During the soil acarine biodiversity study in Muljangori, Hallasan Mt in Jeju, Asca bicornis Canestrini & Fanzago, 1887 was discovered from moss habitat and are reporting this as a new record to Korean Mesostigmata fauna. We provide the illustration and description. This species has morphological characteristics of all dorsal setae nude and needle shaped, lateral caudal projection of PoZ4 shape which are different from the con-general species of A. aphidioides.

One species of the genus Schizoprymnus (Hymenoptera: Braconidae: Helconinae) is reported in this study. The genus Schizoprymnus is a braconid group distributed in the Palaearctic and Oriental regions, which include currently nine species in South Korea. In this study, Schizoprymnus terebralis Snoflk, 1953 is recognized for the first time in South Korea. Descriptions, diagnosis distribution and illustration are provided.

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 delesseriacean parasitic red algal Asterocolax species was collected from Jindo in the southern coast of Korea. This parasitic species found on Pseudopolyneura japonica. And it is distinct from other species of Asterocolax with more or less denticulate branches when matured. This Korean entity is identified as Asterocolax denticulatus (Tokida) Feldmann & Feldmann (Delesseriaceae, Rhodophyta) based on these features. This is the first record of A. denticulatus 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.