• An introduction to the systematics of small-bodied Neacomys (Rodentia: Cricetidae) from Peru with descriptions of two new species. (American Museum novitates, no. 3913 

  Sánchez-Vendizú, Pamela; Pacheco Torres, Víctor R. (Víctor Rául); Vivas-Ruiz, Dan (American Museum of Natural History., 2018-12-10)

  The genus Neacomys includes 10 recognized species of Neotropical spiny mice in the tribe Oryzomyini. Five species have previously been reported from Peru, but the small-bodied Peruvian taxa remain unrevised. In this report, ...
• Developmental biology among corbiculate bees : Bombus impatiens, Including observations on its egg eclosion. (American Museum novitates, no. 3912) 

  Rozen, Jerome G., Jr. (Jerome George), 1928-; Smith, Corey Shepard.; Kocher, Sarah.; Wyman, Eli S. (American Museum of Natural History., 2018-12-04)

  This contribution results from an investigation of four commercially obtained colonies of Bombus (Pyrobombus) impatiens Cresson in an attempt to understand the functional anatomy and behavior of its immature stages. Eggs ...
• South American leaf-cutter bees (genus Megachile) of the subgenera Rhyssomegachile and Zonomegachile, with two new subgenera (Hymenoptera, Megachilidae). (Bulletin of the American Museum of Natural History, no. 425) 

  González, Víctor H.; Griswold, Terry L.; Engel, Michael S. (American Museum of Natural History., 2018-11-02)

  Leaf-cutter bees (genus Megachile Latreille) are among the most common and diverse group of bees. However, the identity and taxonomic placement of many species are problematic and species identification is often difficult. ...
• New genera and species of Myrtaceae-feeding Phylinae from Australia, and the description of a new species of Restiophylus (Insecta, Heteroptera, Miridae). (Bulletin of the American Museum of Natural History, no. 424) 

  Schwartz, Michael D.; Weirauch, Christiane.; Schuh, Randall T. (American Museum of Natural History., 2018-10-31)

  Six new genera of Australian Phylinae are described on the basis of existing collections. The tribe Exaeretini--represented by the two new genera Eucalyptophylus (two new species) and Melaleucaphylus (18 new species)--is ...
• Complex overlapping joints between facial bones allowing limited anterior sliding movements of the snout in diplodocid sauropods. (American Museum novitates, no. 3911) 

  Tschopp, Emanuel; Mateus, Octávio; Norell, Mark. (American Museum of Natural History., 2018-10-25)

  Diplodocid sauropods had a unique skull morphology, with posteriorly retracted nares, an elongated snout, and anteriorly restricted, peglike teeth. Because of the lack of extant analogs in skull structure and tooth morphology, ...
• Basal Cyclorrhapha in amber from the Cretaceous and Tertiary (Insecta, Diptera), and their relationships. (Bulletin of the American Museum of Natural History, no. 423) 

  Grimaldi, David A. (American Museum of Natural History., 2018-10-24)

  Diverse new basal (aschizan) Cyclorrhapha fossilized in amber are described from the Tertiary and Cretaceous, and their relationships are examined with character-based phylogenetic hypotheses for each family or family ...
• On egg eclosion and larval development in euglossine bees. (American Museum novitates, no. 3910) 

  Rozen, Jerome G., Jr. (Jerome George), 1928- (American Museum of Natural History., 2018-10-18)

  This study explores egg eclosion and larval biology of orchid bees (Apidae: Euglossini) in light of existing knowledge from studies dealing with a group of tribes within the Apidae referred to as corbiculate bees. It reports ...
• First tropical American species of the "relict" genus Litoleptis, and relationships in Spaniinae (Diptera, Rhagionidae). (American Museum novitates, no. 3909) 

  Grimaldi, David A. (American Museum of Natural History., 2018-10-09)

  The genus Litoleptis has consisted of nine described species, seven of them Asian and only two in the New World: L. alaskensis Chillcott, known from two specimens from northwest Alaska, and L. chilensis Hennig, known from ...
• Biological inclusions in amber from the Paleogene Chickaloon Formation of Alaska. (American Museum novitates, no. 3908) 

  Grimaldi, David A.; Sunderlin, David.; Aaroe, Georgene A.; Dempsky, Michelle R.; Parker, Nancy E.; Tillery, George Q.; White, Jaclyn G.; Barden, Phillip.; Nascimbene, Paul C.; Williams, Christopher J. (Christopher James), 1970- (American Museum of Natural History., 2018-09-28)

  The Chickaloon Formation in south-central Alaska contains rich coal deposits dated very close to the Paleocene-Eocene boundary, immediately beneath which occur dispersed nodules of amber along with abundant remains of ...
• Supplemental Material for 'Sea anemones through X-rays : visualization of two species of Diadumene (Cnidaria, Actiniaria) using micro-CT. (American Museum novitates, no. 3907)' 

  Gusmão, Luciana Câmara, 1981-; Grajales, Alejandro; Rodríguez, Estefania (2018-09-18)

  Supplemental Material for 'Sea anemones through X-rays : visualization of two species of Diadumene (Cnidaria, Actiniaria) using micro-CT. (American Museum novitates, no. 3907)'
• Sea anemones through X-rays : visualization of two species of Diadumene (Cnidaria, Actiniaria) using micro-CT. (American Museum novitates, no. 3907) 

  Gusmão, Luciana Câmara, 1981-; Grajales, Alejandro.; Rodríguez, Estefania. (American Museum of Natural History., 2018-09-17)

  Diadumenidae is a monogeneric family comprised of 10 valid species in the genus Diadumene. Although these species are distributed in all but the Southern Ocean, Diadumene lineata is a cosmopolitan species and one of the ...
• Parahelicops, Pararhabdophis, paraphyly : phylogenetic relationships among certain Southeast Asian natricine snakes (Hebius). (American Museum novitates, no. 3906) 

  Kizirian, David.; Nguŷẽn, Qủang Trừơng.; Ngo, Hanh Thi.; Le, Minh Duc, 1973- (American Museum of Natural History., 2018-08-21)

  We investigate the phylogenetic relationships of two poorly known Natricinae, Parahelicops and Pararhabdophis, for which we obtained nucleotide sequence data from one mitochondrial gene (cytochrome b) and three nuclear ...
• Morphology and evolution of sesamoid elements in bats (Mammalia, Chiroptera). (American Museum novitates, no. 3905) 

  Amador, Lucila Inés.; Giannini, Norberto P.; Simmons, Nancy B.; Abdala, Virginia. (American Museum of Natural History., 2018-08-17)

  Sesamoids are skeletal elements found within a tendon or ligament as it passes around a joint or bony prominence. Here we review the distribution of sesamoids in bats, the only mammals capable of powered flight. Our survey ...
• Fossil land tortoises (Testudines, Testudinidae) from the Dominican Republic, West Indies, with a description of a new species. (American Museum novitates, no. 3904) 

  Albury, Nancy Ann, 1955-; Franz, Richard (Professor); Rímoli, Renato O.; Lehman, Phillip.; Rosenberger, Alfred L. (American Museum of Natural History., 2018-08-09)

  A new fossil tortoise, Chelonoidis dominicensis, is described from a flooded cave in La Altagracia Province in the southeastern Dominican Republic on the island of Hispaniola. The holotype, and only known specimen, includes ...
• At the vanishing point : environment and prehistoric land use in the Black Rock Desert. (Anthropological papers of the American Museum of Natural History, number 103) 

  McGuire, Kelly R.; Hildebrandt, William R.; Young, D. Craig.; Colligan, Kaely.; Harold, Laura. (American Museum of Natural History., 2018-06-29)

  This volume presents the results of data recovery excavations directed at prehistoric archaeological deposits located near Sulphur Springs, along the southeastern margin of the Black Rock Desert, in Humboldt and Pershing ...
• New Paleogene notohippids and leontiniids (Toxodontia, Notoungulata, Mammalia) from the early Oligocene Tinguiririca Fauna of the Andean Main Range, central Chile. (American Museum novitates, no. 3903) 

  Wyss, André R.; Flynn, John J. (John Joseph), 1955-; Croft, Darin A. (American Museum of Natural History., 2018-06-25)

  Here we describe three new notohippid notoungulate species from the early Oligocene-aged Tinguiririca Fauna (Tinguirirican SALMA), recovered from volcaniclastic deposits of the Abanico Formation in the central Chilean ...
• Systematics and analysis of the radiation of Orthotylini plant bugs associated with callitroid conifers in Australia : description of five new genera and 32 new species (Heteroptera, Miridae, Orthotylinae). (Bulletin of the American Museum of Natural History, no. 422) 

  Symonds, Celia L.; Cassis, G. (American Museum of Natural History., 2018-06-22)

  Orthotyline plant bugs inhabiting the southern conifer genus Callitris in Australia are investigated and classified systemically for the first time, with the description of 5 new genera and 32 new species from Australia. ...
• Occurrence of Dipleura dekayi Green, 1832 (Trilobita, Homalonotidae) in the Devonian of Colombia. (American Museum novitates, no. 3902) 

  Carvalho, Maria da Gloria Pires de. (American Museum of Natural History., 2018-06-21)

  A large and almost complete dorsal exoskeleton of a homalonotid trilobite from the Middle Devonian of Colombia (Floresta Formation) is described and referred to Dipleura dekayi Green, 1832, confirming prior suggestions of ...
• Hirtodrosophila of North America (Diptera, Drosophilidae). (Bulletin of the American Museum of Natural History, no. 421) 

  Grimaldi, David A. (American Museum of Natural History., 2018-06-21)

  Species concepts are morphologically revised and updated for members of the mycophagous genus Hirtodrosophila Duda that occur in America north of Mexico. Photomicrographs of external features, illustrations of male and ...
• Systematic revision of the North American syntropine vaejovid scorpion genera Balsateres, Kuarapu, and Thorellius, with descriptions of three new species. (Bulletin of the American Museum of Natural History, no. 420) 

  González-Santillán, Edmundo.; Prendini, Lorenzo. (American Museum of Natural History., 2018-06-20)

  Four genera formed a monophyletic group, referred to as the Kochius clade, in the phylogeny of the North American vaejovid scorpion subfamily Syntropinae Kraepelin, 1905: Balsateres González-Santillán and Prendini, 2013; ...

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