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The Pacificellinae are a group of small, high-spired land snails distributed on islands across the Pacific. Some species are endemic to particular island groups, but others have wide geographic distributions, several of which have been attributed to anthropogenic transport between islands before western contact. We used DNA sequence data (COI, 16S, ITS2, 28S) from recently collected and historical specimens to estimate a phylogeny of the Pacificellinae, with a focus on Hawaiian species. Phylogenetic analyses support recognizing Lamellidea and Pacificella as distinct genera and indicate that the genus group Tornatellinops should be regarded as a synonym of Lamellidea. The number of taxa defined by species delimitation analyses (ASAP, bPTP, mPTP) varies widely, with between 6 and 42 species estimated in the Hawaiian Islands. These candidate species hypotheses were evaluated in an integrative framework, including shell morphology, geography, and a multilocus phylogeny, to revise the taxonomy of Hawaiian pacificellines. Four Lamellidea species and two Pacificella species are recognized from the Hawaiian Islands, including two widespread species introduced to Hawaiʻi from the South Pacific. Lamellidea peponum in Hawaiʻi shows little genetic divergence from Polynesian specimens previously referred to L. oblonga, and the name L. oblonga is now regarded as a junior synonym. Lamellidea polygnampta is recognized here from across the Hawaiian Islands, L. cylindrica from the island of O‘ahu, and the lowland species, L. extincta, from the main Hawaiian Islands and the Northwestern Islands. The only Pacificella specimens found in Hawai‘i in modern surveys are more closely related to specimens of P. variabilis from Polynesia than to historical specimens of P. baldwini, indicating that the only Pacificella species now found in the main Hawaiian Islands appears to be introduced. Pacificellines have declined in abundance in Hawai‘i over the last century and the two species L. extincta and P. baldwini, formerly present across the Hawaiian Islands, are now either critically endangered or extinct. 

Surveys of snails from New Guinea and surrounding islands provide new distributional and ecological data for Truncatellidae from the Papuan Region. We present an annotated checklist of all Papuan Truncatellidae and the first identification key for the terrestrial genus Taheitia H. and A. Adams, 1863. Unlike widespread marine and estuarine species of Truncatella, the Papuan Taheitia usually have single island ranges and are restricted to forested limestone habitats. New anatomical data suggests that many earlier reports of Taheitia with multi-island distributions appear to be the result of confusion between superficially similar species. Eight new Taheitia species are described: T. biaka sp. nov. from Biak, T. bifurca sp. nov. from Manus,T. gebeensis sp. nov. from Gebe, T. gigantea sp. nov. from Waigeo, T. jodiae sp. nov. from New Britain, T. longpela sp. nov. from New Britain, T. malagan sp. nov. from New Ireland, and T. telnovi sp. nov. from Misool. 

the Endodontidae are land snails endemic to Pacific islands, and the type genus Endodonta and its 11 species are endemic to the Hawaiian Archipelago. most members of the family, because of their ground dwelling habits, are vulnerable to introduced predators and most of the species in Hawaii are already extinct. Fossil specimens have been used to describe extinct species, but no living Endodonta species have been described in more than 100 years. Over the last 15 years, the most comprehensive search for land snails in Hawaii has been carried out, with more than 1000 sites surveyed to date. the only known living Endodonta species is from the island of Nihoa, discovered in 1923, but remaining undescribed until now. Here we finally give what we think is the last Endodonta species a name and describe it using an integrative taxonomic approach. In describing this last Endodonta species, our hope is to inspire increased awareness and appreciation that facilitates and motivates conservation for this species and all the other undiscovered and unnamed species threatened with extinction. unless protection of this species is implemented, it may be extinct within the next decade and we will lose the last of a lineage that existed for millions of years, and the stories it could tell. 

Recent surveys of Oahu’s Waianae Mountains uncovered a small, previously undescribed species of Auriculella that is conchologically similar to the three members of the A. perpusilla group all of which are endemic to the Koolau Mountain Range. However, sequence data demonstrate that the perpusilla group is not monophyletic. Moreover, the new species is not closely related to A. perpusilla or A. perversa , the only extant members of the group, but instead is sister to A. tenella , a species from the high spired A. castanea group. A neotype is designated for A. auricula , the type species of Auriculella ; all members of the conchologically similar perpusilla group are anatomically redescribed; and lectotypes designated for A. minuta , A. perversa , and A. tenella . The new species is described and compared to the type of the genus, members of the perpusilla group, and the genetically similar species A. tenella .