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We provide a list of all named Lepidoptera in the USA and Canada. Data include ranges, host plants, and synonymies. Information is annotated, including detailed range notes and host-plant records. Data are also provided in unique, easily filtered fields. The list establishes 12,541 native species, 325 exotic species, and 189 species straying occasionally into North America. In addition, we list 146 known but undescribed species, 112 species with uncertain or unresolved status, and 450 excluded species. 7423 of the described species in North America have host record data. Information is presented here as an Excel spreadsheet.

Solenogastres (Mollusca, Aplacophora) are a unique and understudied group of marine invertebrates of evolutionary and ecological significance. Their diversity remains underestimated due to frequent lack of identification by non-specialists, limited molecular data, and the complexity of their taxonomy. Here we present the first Solenogastres from Puerto Rico, expanding the group's known geographic distribution in the Caribbean Sea. Using an integrative taxonomic approach, we describe two new species, Dorymenia gummi sp. nov. and Strophomenia boricua sp. nov., and document their associations with coral hosts. These findings offer new insights into the ecology and biodiversity of these elusive mollusks.

Freshwater leeches of the genus Helobdella Blanchard, 1896 (Annelida: Clitellata) are widely distributed in the New World, with most of the species occurring in the neotropics and a single species native to Europe. Species of the genus are characterized by the presence of an eversible proboscis, dorsoventrally flattened body, presence of a single pair of eyespots, and a preference for feeding on the hemolymph of aquatic invertebrates. In this study, two new species of Helobdella are described based on specimens collected in Mexico, Helobdella papilloprocta sp. nov. and Helobdella gulloae sp. nov. These specimens were preliminarily identified as H. socimulcensis (Caballero, 1931), but detailed morphological and molecular analyses confirmed their status as separate species. In addition, a neotype for Helobdella socimulcensis is designated, and a redescription of the species is provided based on specimens from the type locality: Xochimilco, Mexico City, Mexico. Finally, H. austinensis in Nuevo León and H. europaea in Morelos, Mexico are reported for the first time, representing new records for the country. In total, ten species of Helobdella are known from Mexico.

A new species of the demersal calanoid copepod genus Pseudodiaptomus is described from specimens collected from the Great Barrier Reef, Australia. This species most closely resembles P. burckhardti in the structure of male fifth leg with reduced endopods on both legs, but differs from the latter in several features, including armatures of male fifth leg, asymmetrical female urosome and posterodorsal projections on the male prosome.

The Tui Chubs, Siphateles spp., are found widely across the Great Basin and in some adjacent regions. Nearly all diversity of Siphateles has been consolidated under the name S. bicolor and there are numerous isolated populations of Tui Chubs of uncertain taxonomic standing and therefore unclear conservation priority. The Fish Lake Valley Tui Chub (FLVTC) has been recognized informally as S. bicolor ssp. 4 with a limited natural distribution in Fish Lake Valley in southwest Nevada. Considering that a rigorous examination of the phylogenetic relationships of the FLVTC and other Tui Chubs has not been conducted, the FLVTC is placed in a taxonomic framework by first applying a species delimitation method to S. bicolor sensu lato using mitochondrial data and then conducting phylogenetic analyses of genome-wide SNP data. Siphateles bicolor is better characterized by seven species, all with existing names, which here are considered to be valid Siphateles species. Furthermore, the separation of Alvord Basin Siphateles from other Siphateles is apparent as a deeply divergent lineage. As a result, we propose Epizon Campbell & Finger, gen. nov. to contain these fishes. The Fish Lake Valley Tui Chub is found to be the earliest-branching lineage of S. obesus in our SNP data set and are highly differentiated from other S. obesus. These findings are concordant with geologic evidence that indicates that Fish Lake Valley became connected to the broader Lahontan Basin ~2 million years ago, with gene flow possible until ~0.5 million years ago. Based on the geographic distribution and magnitude of genetic divergence, we find the recognition of FLVTC as a subspecies of S. obesus is appropriate.

An updated checklist of the bats of Mexico is presented, comprising eight families, 71 genera, and 146 species. Since the last checklist published by Ramírez-Pulido et al. (2014), two new species have been described: Vampyressa villai and Corynorhinus leonpaniaguae, and two more, Phyllops falcatus and Phyllostomus hastatus, were recorded for the first time in the country. Additionally, 22 taxonomic changes have occurred since the previous list. Of the 146 bat species recorded, 20 are endemic to Mexico, highlighting the country's megadiversity, reflection of its unique biogeographic and ecological characteristics. This remarkable distinction also brings significant responsibility, as Mexico holds the highest number of endemic bat species worldwide. Consequently, protecting these endemic species and those at risk of extinction must be a top priority in the country's decision-making processes and conservation policies.

The genus Yufengus gen. nov. is established for a new species of Limacodidae, Y. atrophaneuroides sp. nov. Yufengus is from Taiwan, yet its larva is similar to monkey-slug caterpillars in the New World (Phobetron Hübner, 1825: Limacodidae) in being covered with hairy, detachable tubercles. Monkey-slug caterpillars are currently known to form a monophyletic group which include as many as eight genera in the Americas referred to as the Phobetron complex by Epstein (1996). Although the larva of Yufengus appears, in particular, most similar to the genus Phobetron, a closer look at morphology reveals fundamental differences that are shared with Asian Phrixolepia Butler, 1877. Caterpillars of the new genus are structurally similar to Phrixolepia, but Phrixolepia is more translucent, less hairy, and differs in other characters including those of adults, separated by wing pattern and genitalia. In addition to describing the new genus Yufengus, we explore whether it is indeed in the same clade as the Phobetron complex of genera from the New World. The life history and morphology of adults and immature stages are described in this study.

Donacia koreana sp. nov. is described from South Korea, with detailed descriptions and illustrations of both the adult and larval stages. A key for species identification, distribution map, host plant associations, oviposition behaviors, feeding patterns, and other ecological information, along with partial sequences of mitochondrial cytochrome c oxidase subunit I, are also presented.

The genus Euryobeidia Fletcher, 1979, is reviewed based on morphological characters and available molecular data of cytochrome c oxidase subunit I. Four new taxa of this genus are described: E. supercostata sp. nov. and E. tigratoides sp. nov. from Hainan, China; E. xuei sp. nov. from N. Vietnam and Yunnan, China; and E. tigratoides leopardiformis subsp. nov. from Hubei and Sichuan, China. E. incrassata Xiang & Han, 2017 is downgraded to subspecies rank under E. languidata (Walker, 1862) (E. languidata incrassata Xiang & Han, 2017, stat. nov.). The subspecies E. languidata yakushimensis Inoue, 1976, is raised to species status (E. yakushimensis Inoue, 1976, stat. nov.). Adult males and females of all taxa mentioned above, including their genitalia, are illustrated, except for E. supercostata sp. nov. and E. xuei sp. nov., which are known only from males. An identification key and a geographic distribution map for all known taxa of Euryobeidia are presented. The systematics and mimetic relationships of Euryobeidia are briefly discussed.

The genus Plotina Lewis, 1896 (Coleoptera, Coccinellidae, Plotinini) is distributed in the Oriental region. To date, eight species have been described, all of which are currently recorded from China. A new species, Plotina nanlingensis Lin & Wang, sp. nov. is described from the Nanling National Nature Reserve in China. Morphological details and genitalia of the new species are presented. A checklist of all known species in this genus is also provided.