We document the rediscovery of Cylindera (Cylindera) nudata (W. Horn, 1915), a rarely collected tiger beetle species, from Durango, Mexico, nearly a century after its description in 1879. This rediscovery is based on a single female collected in 1972, and is only the second known specimen. Images of this specimen are provided, together with an English translation of the original German description and a review of its nomenclature. The unique female specimen is here designated as neotype for this species because it is the only extant specimen known. The holotype, the sole male and sole specimen in the original description, was destroyed during World War II. The neotype is deposited at the Carnegie Museum of Natural History, Pittsburgh, Pennsylvania, USA. The information presented here will assist tiger beetle taxonomists in recognizing this species should it ever be collected in the future in Durango, or from adjoining Mexican states.

The egg, larval, and pupal stages of the plusiine moth Autographa pseudogamma (Grote, 1875) are discussed and illustrated based on a laboratory iso-female rearing of a wild moth collected near Big Sky, Montana, in mid-July 2016. Eggs, larval coloration and pattern, and pupae are very similar to those already known from close relatives in the genus Autographa Hübner, [1821]. DNA sequence data from the COI barcode region were used to generate a phylogenetic tree showing the position of A. pseudogamma amongst other North American members of the genus and to help confirm the identification of field-collected moths. Genetic analyses indicate that A. pseudogamma is most closely related to A. sansoni Dod, 1910, contrary to relationships previously generated based on morphology.

The Kishenehn Formation is a unit of sedimentary rocks exposed largely in the cutbanks of the Flathead River and its tributaries in and around Glacier National Park in northwestern Montana and adjacent British Columbia. From these rocks along the Flathead's Middle Fork, which range from very fine-grained oil shales to and including pebble-cobble conglomerates, vertebrate and molluscan faunas of middle Eocene age have been collected over nearly 40 years by a combination of prospecting, with access by raft, to screen washing sediment from the most fossiliferous exposures. The mammalian fauna from the formation includes at least twenty-six taxa, ranging in size from tiny rodents and insectivores to a very large brontothere. A radiometic date of ca. 46.2 Ma was obtained from below the fossiliferous deposits. The age of the fauna, presumably within one or two million years younger than the radiometric date, is reinforced by the presence of the Uintan index taxon Amynodon Marsh, 1877, as well as the co-occurrence of an eomyid rodent referred to Metanoiamys Chiment and Korth, 1996, and the sciuravid rodent Pauromys Troxell, 1923. The fauna has a scarcity of Carnivora, which may reflect the real faunal composition. It is striking for its total absence of selenodont artiodactyls. Whether the latter should be attributed to geologic age, which is presumably early after these animals developed in North America or Asia, or is environmentally significant, must remain conjectural. Somewhat widely distributed in the North American west, earlier Uintan and/or Shoshonean mammalian faunas remain difficult to correlate, due at least in part to distinctive endemism or environmental uniqueness. The fauna also has indications of interchange between North American and Asian components at that time.

Of the twenty-six mammalian taxa recognized in the fauna, one is established as new, the rodent Microparamys solis, new species.

The Gilmore City Formation of north-central Iowa represents an upward-shoaling sequence of carbonate rocks ranging from normal marine conditions in the lower portion of the section to prograding oolite shoals at the top. At most exposures, the formation contains an abundant and diverse fauna that has been used in several attempts to correlate the Gilmore City with the Mississippian type section. Results of biostratigraphic correlation indicate that the Gilmore City Formation spans the Kinderhook-Osage boundary, occupying a position that, in the Mississippian type section, is represented by an unconformity. Gilmore City fossils actually have closer affinities with Cordilleran faunas than with those of the Midcontinent.The gastropods constitute one of the most abundant and diverse faunal elements of the Gilmore City Formation, consisting of more than 75 species representing about 50 genera and subgenera. This first part deals only with the Bellerophontoidea and Euomphaloidea. Described and illustrated species include the bellerophontoideans Bellerophon (Bellerophon) panneus White, 1862, Bellerophon (Bellerophon) meeki? Koninck, 1883, Waagenella spergenensis (Gordon and Yochelson, 1983), Waagenella sp. cf. Waagenella spergenensis (Gordon and Yochelson, 1983), Waagenella sp. indet., Retispira sp. cf. Retispira exilis (Koninck, 1883), and Euphemites rollinsi, new species; and the euomphaloideans Euomphalus springvalensis White, 1877a, Euomphalus luxus White, 1877b, Euomphalus ammon White and Whitfield, 1862, Straparollus obtectus, new species, and Serpulospira paradoxus (Winchell, 1864).