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Solenogastres is a group of mollusks with evolutionary and ecological importance. Nevertheless, their diversity is underestimated and knowledge about the distribution of the approximately 300 formally described species is limited. Factors that contribute to this include their small size and frequent misidentification by non-specialists. Recent deep-sea explorations have resulted in the collection of numerous specimens through effective methods such as epibenthic sledges. However, this is a costly, labor-intensive, and destructive methodology. In contrast, Autonomous Reef Monitoring Structures (ARMS) offer a novel, non-destructive approach, by providing a substrate for benthic organism colonization. This study is the first to describe Solenogastres collected using ARMS, demonstrating that they are an effective tool for biodiversity assessment and characterizing rare marine invertebrates. Following an integrative taxonomic approach, two new solenogaster species are described: Dondersiatweedtae Farris, Olson & Kocot, sp. nov. (Dondersiidae) and Eleutheromeniabullescens Cobo, sp. nov. (Pruvotinidae). The diagnosis of the family Dondersiidae is amended and the necessity of reassessing the validity of the current diagnostic characters for Pruvotinidae, and its classification is emphasized. The two newly described species exhibit distinct external characteristics; D.tweedtae sp. nov. has a striking pink color with a bright yellow dorsal keel and E.bullescens sp. nov. has a unique, discontinuous dorsal keel with nearly spherical protrusions. The presence of cnidocytes in the digestive systems of both species indicate that they feed on cnidarians. It is hypothesized that, like in some nudibranchs, their coloration and body features reflect defensive adaptations related to their diet. This study shows that while habitus alone is typically insufficient for accurate identification in solenogasters, it can sometimes simplify the process. For this, live observations and photographs are essential.

Flies belonging to the families Streblidae and Nycteribiidae are highly specialized arthropods that feed on the blood of bats. Their morphology varies and has adapted throughout their coevolutionary history with hosts. Bat flies are often associated with specific bat species and can establish distinct infracommunities. Interaction networks have been used to better understand these associations, revealing interaction modules between bats and their parasites. The Magdalena River basin is the largest in Colombia, encompassing a wide variety of climatic and ecological conditions, with up to 98 bat species reported. We conducted field trips to capture bats and bat flies in different locations along the basin and reviewed literature records and biological collections to gather additional data on interactions between bats and bat flies in this region. We found a high diversity of bats and bat flies in the Magdalena River basin, revealing a medium specialization and modularity in these interactions. We identified bat fly infracommunities and negative associations between certain bat fly species, suggesting competition for resources within hosts. The specialization is similar to that reported in degraded and fragmented habitats where the availability of shelters decreases, favoring the overcrowding of bats, forming multi-species colonies. In conclusion, our study provides important information on the interactions between bats and bat flies in the Magdalena River basin, expanding knowledge about the diversity and structure of these communities in inter-Andean landscapes.

Three new species of the genus Atkinsoniella (Hemiptera: Cicadellidae: Cicadellinae), A.chongqingana Jiang & Yang, A.likuni Jiang & Yang and A.biostiolum Jiang & Yang, sp. nov., collected from southwestern China, are described and illustrated. The two new species, A.chongqingana Jiang & Yang, sp. nov. and A.likuni Jiang & Yang, sp. nov., are similar to A.nigrominiatula (Jacobi, 1944), A.latior Young, 1986, A.limba Kuoh, 1991, A.dormana Li, 1992, A.divaricata Yang, Meng & Li, 2017, A.peaka Yang, Meng & Li, 2017, and A.zizhongi Jiang & Yang, 2022 in appearances, but can be distinguished from these species by the characteristic of aedeagus, paraphysis, and pygofer. Atkinsonellabiostiolum Jiang & Yang, sp. nov. can be distinguished from all the known Atkinsoniella species by its special color and markings, as well as males having one ostiole in the center of the base of each subgenital plate. A key to Atkinsoniella species from China is provided.

In the present study, the rare true bug Bannacorishyalinus (Schaefer & Ashlock, 1970), comb. nov. (Hemiptera, Heteroptera, Pentatomomorpha, Pentatomoidea, Saileriolidae), which is endemic to Vietnam, is redescribed and transferred from the genus Saileriola China & Slater, 1956 to the genus Bannacoris Hsiao, 1964 based on morphological characteristics. Adults and nymphs of this species congregate in groups of several individuals and suck sap from the abaxial side of the leaves of Litsea sp. (Lauraceae). They cause visible feeding damage on the adaxial side of Litsea leaves, similar to that caused by members of the heteropteran family Tingidae Laporte, 1832 (Cimicomorpha, Miroidea). The new knowledge of B.hyalinus comb. nov. also represents the first formal record of the feeding habits of Saileriolidae China & Slater, 1956. An identification key to all four species of this family is provided.

Seamounts are biodiversity hotspots that face increasing threats from anthropogenic activities. Seamounts host diverse sessile suspension-feeding organisms such as sponges and anthozoans, which are crucial for seamount ecosystems as they construct three-dimensional habitats utilized by numerous other animals. Therefore, accurate identification of seamount fauna, in particular of sessile suspension-feeding organisms, is of paramount importance for robust conservation efforts. This study focused on Zoantharia, a sessile anthozoan group, and specifically the family Parazoanthidae, known for associations with many different host taxa, prominently including octocorals and sponges. We collected Parazoanthidae specimens from northwestern Pacific seamounts and formally describe a new species, Vitrumanthusflosculus Kise & Reimer, sp. nov., based on morphological and molecular analyses. We also report the complete mitochondrial genomes of this new species and the related species Churabanakuroshioae. Our results reconfirm the phylogenetic positions of these two species within Parazoanthidae, while demonstrating much remains to be learned about the benthic diversity of northwestern Pacific seamounts.

The relationship of Xylomoiastrix Mikkola, 1980; Xylomoiaretinax Mikkola, 1998; and Xylomoiastangelmaieri Mikkola, 1998 is reconsidered based on 59 genitalia slides (37 males and 22 females) and 40 barcodes of adults collected from the type localities and areas in-between. Due to lack of stable morphologic differences, apart from the wing coloration of X.retinax, and low genetic distance between the three, they are considered as three subspecies of X.strix: the nominotypical one X.strixstangelmaieri stat. nov. and X.strixretinax stat. nov. Included are photographs of all specimens covering 37 adults, and 28 male and 18 female genitalia, as well as a phylogenetic tree and a map showing collecting localities.

A new species of the family Calliopiidae was collected from the East Sea of Korea. Calliopiusulleungensis sp. nov. is similar to C.columbianus Bousfield & Hendrycks, 1997 in having numerous calceoli on the posteromedial margins of antennae and a weakly carinate body. However, the new species can be distinguished from C.columbianus by the shorter process on peduncular article 3 of antenna 1, subrectangular eyes, and fewer articles in the antenna flagellum. This species, along with C.ezoensisShimoji et al. 2020, occurs in the Western Pacific. The females of the two species are morphologically very similar, but the males of C.ezoensis are easily distinguishable, as the gnathopod 1 is larger than gnathopod 2. The new species is fully illustrated and extensively compared with related species. In this paper, both Calliopius and Calliopiidae are reported from Korea for the first time. A key to species of Calliopius is also provided.

Three species of the spider family Philodromidae are reported from the south of China. A new genus, Sinodromus gen. nov., is described from Jiangxi, Fujian, and Hunan Provinces. It can be distinguished from other genera of Philodromidae by the tegular apophysis of the palp and the cymbial process, as well as by its uniquely striped abdomen. The type species, S.fujianensis sp. nov., and a second species, S.perbrevis sp. nov., are described and illustrated; these species occur in bamboo forests in hilly areas. Additionally, the female of Philodromusguiyang Long & Yu, 2022 is described for the first time from Jiangxi and Hunan Provinces. All species are illustrated with SEM micrographs, and their distributions are mapped.

Twenty-one new species of jumping spiders from five provinces of South China are described: Cheliceroidesjinxini sp. nov. (♂), Dendroiciusqiong sp. nov. (♂♀), Iciusdeergong sp. nov. (♂♀), Iruraqiuhangi sp. nov. (♂♀), I.yarlungzangbo sp. nov. (♂♀), Mintoniashiwandashan sp. nov. (♂), Myrmarachnekuan sp. nov. (♂♀), Nandiciusxiefengi sp. nov. (♂♀), Pancoriusmedog sp. nov. (♀), P.yingjiang sp. nov. (♂♀), Piranthusmaddisoni sp. nov. (♂♀), Simaethahainan sp. nov. (♂♀), Stertiniuslhoba sp. nov. (♂♀), Synagelideskongmingi sp. nov. (♂♀), S.xuandei sp. nov. (♂♀), S.yunchangi sp. nov. (♂♀), S.yidei sp. nov. (♂), S.zilongi sp. nov. (♂♀), Yaginumaelladaweishan sp. nov. (♂♀), Y.moinba sp. nov. (♂♀), and Y.pingbian sp. nov. (♂♀). Nepalicius Prószyński, 2016, syn. nov. is proposed as a junior synonym of Okinawicius Prószyński, 2016. Three new combinations are proposed: O.nepalicus (Andreeva, Hęciak & Prószyński, 1984), comb. nov. and O.seychellensis (Wanless, 1984), comb. nov. transferred from Nepalicius, and O.daoxianensis (Peng, Gong & Kim, 2000), comb. nov. transferred from Philaeus Thorell, 1869. The unknown females of O.nepalicus, Padillothoraxexilis (Cao & Li, 2016) and Silerhanoicus Prószyński, 1985 are described for the first time. Distribution maps of the studied specimens are also provided.

An annotated checklist of the Sarcophagidae of Jamaica is presented based on material collected from 2018 to 2024, supplemented with specimens in museum collections as well as literature records. The checklist comprises 45 species from 21 genera, of which 23 species from 15 genera were collected during the present study and identified based on male terminalia. The following species are recorded from Jamaica for the first time: Bahamiolaorbitalis Dodge, Peckia (Sarcodexia) dominicana (Lopes), Tapacuramariarum Tibana & Lopes, and Lepidodexia (Harpagopyga) diversipes (Coquillet).