The purpose of this study was to record for the first time in Korea the presence of Melanoides tuberculata (an invasive alien species), which was confirmed during the “National Survey on the Status of Alien Species” in Jukdang stream (also known as Guppy Stream, located in Icheon, Gyeonggi Province), which is affected by the year-round discharge of heated effluent from a large semiconductor factory and where various tropical organisms, including ornamental fish, appear due to artificial release. A Total of 52 specimens were collected, and they can be visually distinguished from native melanian snails by their reddish-brown flames and spots. Genetic analysis further confirmed the species as Melanoides tuberculate. Melanoides tuberculata typically inhabits tropical climates, but its presence has been confirmed in altered aquatic environments such as Jukdang stream, where the water temperature remains warm even in a temperate climate. This indicates the need for further monitoring of domestic streams with similar conditions, particularly those receiving heated effluent, like Jukdang stream. Additionally, due to its strong reproductive capacity, including parthenogenesis, and its adaptability to various environments, there have been cases where the populations of Pomacea lineata and Aylacostoma tenuilabris have declined. This suggests that Melanoides tuberculata may have a competitive advantage in interspecific competition, potentially suppressing native species populations if it spreads within the domestic ecosystem. Melanoides tuberculata serves as an intermediate host for parasites that can cause diseases in both humans and animals, raising public health concerns in many countries. There is also a significant risk that it could be mistaken for native melanian snail species and consumed, which necessitates a high level of caution.

총채벌레목 관총채벌레과의 미기록속인 Pachyliothrips속에 속하는 단일종 Pachyliothrips zelkovae Okajima, 2006 (느티나무관총채벌레, 신 칭)을 한국에서 처음으로 보고한다. 성충의 형태적 특징과 형태 사진을 수록하였다.

2003년 국내에 침입한 외래종 등검은말벌(Vespa velutina nigrithorax)은 현재 남한 전체에 확산된 상태이며 이들로 인한 사회 경제적 피해는 지속적으로 증가하고 있다. 따라서 이들을 방제하기 위한 다양한 방법이 시도되 고 있으나 그 효과는 대부분 미미한 상황이다. 그러나 최근 생물학적 방제에 대한 관심이 집중되는 상황에서 외래종 등검은말벌에 대한 새로운 포식자 2종이 발견되어 이를 보고하고자 한다. 2023년 8월 11일 전북 무주군 적상면 일대에서 오소리 배설물 조사 중 배설물 속에 다량의 말벌 사체가 발견되었고 분석 결과 10여개체의 등검 은말벌로 나타났다. 이는 일반적으로 땅벌류를 주로 포식하는 오소리가 대형 말벌류를 포식하는 첫 기록이다. 또한 2023년 12월 10일 안동 일대에서 등검은말벌 벌집 조사를 하던 중 벌집에 10여 마리의 직박구리가 벌집 외피를 깨고 내부에 있는 애벌레와 성충들을 포식하는 장면이 관찰되면서 벌매에 이어 새로운 조류 포식자를 기록한다.

The genus Hyadina Haliday, 1830 is reported for the first time from Korean fauna along with two nominate species: Hyadina fukuharai Miyagi, 1977, and H. pulchella Miyagi, 1977. Their diagnoses, external feature, and a key of these species are provided here.

The genus Stenotothorax is reported for the first time in the Korean Peninsula. While working on Korean Aphodiinae, we identified Stenotothorax hibernalis (Nakane & Tsukamoto) from the Goseong-gun, Gangwon Province. This species was found in the northern region of South Korea. A key to Aphodiini genera in Korea, habitus photographs, and illustrations of diagnostic characters are provided to facilitate identification.

The Genus Greenidea includes 66 species worldwide. Only two species have been recorded in Korea: G.kuwanai and G.nipponica. We collected Greenidea nigra Maki, 1917 on Quercus glauca in Jeju. This species has been recorded in Japan and Taiwan. In this study, we report this species for the first time in South Korea, and describe morphological features of apterous viviparous females.

Brachydeutera Loew, 1862(코주부물가파리속, 신칭)는 물가파리과, 물가파리아과에 속하는 작은 분류군이다. 지금까지 이 속에는 전 세계 적으로 16종이 기록되어 있으며, 모든 동물구계에서 발견되지만 아열대 및 열대 지방, 특히 아프리카와 아시아에서 종 다양성이 풍부하다. 본 연구 를 통해 Brachydeutera속을 국내 미기록종 B. meridionalis (Rondani, 1856)(코주부물가파리, 신칭)과 함께 처음으로 보고하며, 이 종에 대한 진단 형질, 형태학적 사진 및 생태사진을 제공하였다.

The family Periscelididae Oldenberg is reported for the first time from Korean fauna along with three nominate species, Cyamops hotei Sueyoshi, 2004, Stenomicra angustiforceps Sabrosky, 1965 and S. fascipennis Malloch, 1927. Stenomicra have been collected at grassy areas, whereas Cyamops have been founded near wet habitats. The descriptions and illustrations of external features of these species are provided here.

Milichiidae Schiner, 1862 is a small family of Diptera, with 19 genera and 360 described species worldwide. In Korea, only two species in a single genus, Aldrichiomyza Hendel, 1914, have been recorded. Milichiid species, small-sized acalyptrate flies, are generally associated with decaying plants and animals. In particular, Desmometopa Loew, 1866 in the family has a commensalistic habit, more precisely the phoretic relationship, that has been observed with predacious insects and spiders, in which adults feed on the juices of the prey. In this study, we recognized Desmometopa microps Lamb, 1914 for the first time in the Korean Peninsula. This is also the first record of the genus from the country. Herein, we provide diagnosis of D. microps based on the Korean specimens with images.

The genus Acymatopus Takagi is reported for the first time from Korean fauna along with two nominate species, A. minor Takagi, 1965 and A. takeishii Masunaga, Saigusa & Yang, 2005. This genus belonging to the subfamily Hydrophorinae in the family Dolichopodidae, is comprised of only six species in the world and distributed only in Japan and China yet. Both adults and larvae of this genus are known to be found on rugged and rocky marine shores of the tidal zone. The authors found the first recorded species in the west seaside of Korea, where many barnacles are inhabited. The descriptions and illustrations of external features including male genitalia of newly recorded species are provided here.

The genus Icerya Signoret, 1876 has 38 species distributed in the world, and some are known to cause damage to valuable crops. The Seychelles scale, Icerya seychellarum (Westwood) (Hemiptera: Coccomorpha: Monophlebidae) was found on Cycas revoluta located in the province of Seogwipo-si, Jeju Island, South Korea. This species is highly polyphagous and has been reported to attack host plants of 136 genera, it is widely distributed in tropical and subtropical regions. In South Korea, the species was presently considered a quarantine pest and it seems that control is needed. In this study, I. seychellarum is recorded for the first time in South Korea, we provide information on the distribution, host plants, and description of this species.

The genus Daiconotrechus Ueno, 1971 is endemic genus of Japan with two subgenera, Daiconotrechus Ueno, 1971 and Tsuiblemus Ueno, 2007. Adults of all species in this genus are eyeless with depigmented and elongated body. These morphological features are typical characters of adaptation to subterranean environments. Distribution of all species of the subgenus Tsuiblemus is restricts to Tsushima Island, Japan. In this study, we report the genus Daiconotrechus for the first time in Korea, with a new species in the subgenus Tsuiblemus. Illustrations of morphological characters and habitus are also provided.

The genus Brachydeutera Loew, 1862 is a small group of acalyptratae flies belonging to the subfamily Ephydrinae in the family Ephydridae. Up to now, 16 described species have been recorded worldwide, and although it occurs in all fauna regions, it is most diverse in the subtropics and tropics, particularly in Africa and Asia. This genus is recorded for the first time in the Korean fauna based on the discovery of a nominated species, Brachydeutera meridionalis (Rondani, 1856). Diagnoses, figures of morphological features, and an ecological photograph of the firstly recorded species are provided herein.

The small-sized water strider genus Rhagadotarsus Breddin is known to be widely distributed in Southeast Asia. In a recent survey, we found Rhagadotarsus kraepelini Breddin from Gyeongsangbuk province. This species is known to non-native species in Japan. We provide descriptions and photographs of the external morphology of R. kraepelini. And a key to genera of Korean Gerridae is also provided to facilitate identification.

본 연구에서 Tagosodes pusanus Distant, 1912를 포함한 Tagosodes Asche and Wilson, 1990속을 국내에서 처음으로 보고한다. T. pusanus 의 분포지역, 기주식물, 형태학적 정보를 제공하였다.