• 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 ...
• 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 ...
• 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 ...
• 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 ...
• Convergent evolution of a eusuchian-type secondary palate within Shartegosuchidae. (American Museum novitates, no. 3901) 

  Dollman, Kathleen N.; Clark, James Matthew, 1956-; Norell, Mark.; Xu, Xing, 1969-; Choiniere, Jonah N.; Mongolian-American Museum Paleontological Project.; Mongolyn Shinzhlėkh Ukhaany Akademi. (American Museum of Natural History., 2018-06-18)

  Shartegosuchids are a poorly known, early-branching group of Asian and North American crocodylomorphs. Shartegosuchids have been hypothesized to have eusuchian-type secondary palates, but a paucity of described material ...
• In situ observations of the meso-bathypelagic scyphozoan, Deepstaria enigmatica (Semaeostomeae, Ulmaridae). (American Museum novitates, no. 3900) 

  Gruber, David F.; Phillips, Brennan.; Marsh, Leigh.; Sparks, John S. (American Museum of Natural History., 2018-05-09)

  Deepstaria enigmatica (Semaeostomeae: Ulmaridae) is one of the largest and most mysterious invertebrate predators of the deep sea. Humans have encountered this jellyfish on only a few occasions and many questions related ...
• A second specimen of Citipati osmolskae associated with a nest of eggs from Ukhaa Tolgod, Omnogov Aimag, Mongolia. (American Museum novitates, no. 3899) 

  Norell, Mark.; Balanoff, Amy M.; Barta, Daniel E.; Erickson, Gregory M. (American Museum of Natural History., 2018-04-26)

  Adult dinosaurs preserved attending their nests in brooding positions are among the rarest vertebrate fossils. By far the most common occurrences are members of the dinosaur group Oviraptorosauria. The first finds of these ...
• Preliminary study of the bumble bee Bombus griseocollis, its eggs, their eclosion, and its larval instars and pupae (Apoidea, Apidae, Bombini). (American Museum novitates, no. 3898) 

  Rozen, Jerome G., Jr. (Jerome George), 1928-; Smith, Corey Shepard.; Johnson, Dennis E. (Dennis Earl), 1942- (American Museum of Natural History., 2018-04-04)

  This paper describes and illustrates the egg, fifth, first, and fourth larval instars, as well as the female pupa of Bombus (Cullumanobombus) griseocollis (DeGeer), all collected from a single nest in June 2017 in Wisconsin. ...
• A new species of Forstercooperia (Perissodactyla, Paraceratheriidae) from northern China with a systematic revision of forstercooperiines. (American Museum novitates, no. 3897) 

  Wang, Hai-Bing.; Bai, Bin, 1981-; Meng, Jin (Paleontologist); Wang, Yuan-qing. (American Museum of Natural History., 2018-03-21)

  Forstercooperiines are a group of large, primitive rhinocerotoids that are commonly regarded as ancestral to later giant rhinos. However, the type genus of forstercooperiines, the Middle Eocene Forstercooperia, is one of ...
• A new collared lizard (Tropidurus, Tropiduridae) endemic to the western Bolivian Andes and its implications for seasonally dry tropical forests. (American Museum novitates, no. 3896) 

  Carvalho, André L. G. (André Luiz Gomes); Rivas, Luis Rolando.; Céspedes, Ricardo.; Rodrigues, Miguel Trefaut Urbano. (American Museum of Natural History., 2018-03-19)

  In this study we describe Tropidurus azurduyae, a new species of lizard endemic to the Andes. This species is restricted to inter-Andean dry valleys of central and southern Bolivia, within the ecoregion known as Bolivian ...
• Leeches from Chiapas, Mexico, with a new species of Erpobdella (Hirudinida, Erpobdellidae). (American Museum novitates, no. 3895) 

  Tessler, Michael.; Siddall, Mark Edward, 1966-; Oceguera-Figueroa, Alejandro. (American Museum of Natural History., 2018-03-12)

  Freshwater leeches were collected from Chiapas, Mexico. Among these collections and prior records, a total of nine species were found, comprising six genera and four families. One species, Diestecostoma octannulata, ...
• A review of the Pattonomys/Toromys clade (Rodentia, Echimyidae), with descriptions of a new Toromys species and a new genus. (American Museum novitates, no. 3894) 

  Emmons, Louise.; Fabre, Pierre-Henri. (American Museum of Natural History., 2018-03-09)

  New phylogenomic analyses of South American arboreal echimyids show that there are three species within the genus Toromys (T. grandis, T. rhipidurus, and T. sp. nov.) and that the genera Pattonomys and Toromys form a clade ...
• Nesting biologies and mature larvae of oxaeine bees (Apoidea, Andrenidae). (American Museum novitates, no. 3893) 

  Rozen, Jerome G., Jr. (Jerome George), 1928- (American Museum of Natural History., 2018-02-22)

  This study encompasses a number of field encounters by the author and others with nests of representatives of three of the four genera of the little-known New World andrenid subfamily Oxaeinae. Species treated include ...
• Puyehuemyia chandleri, gen. nov., sp. nov. (Diptera, Opetiidae) : remnant of a Cretaceous biota in Chile. (American Museum novitates, no. 3892) 

  Amorim, Dalton de Souza.; Silva, Vera Cristina.; Brown, Brian Victor. (American Museum of Natural History., 2018-02-21)

  The first Opetiidae known from the Southern Hemisphere is described--Puyehuemyia chandleri, gen. nov., sp. nov.--based on a female specimen collected in Valdivian forest in the Province of Osorno, south Chile. The Palearctic ...
• A revision of Philander (Marsupialia, Didelphidae). Part 1, P. quica, P. canus, and a new species from Amazonia. (American Museum novitates, no. 3891) 

  Voss, Robert S.; Díaz-Nieto, Juan F.; Jansa, Sharon A.; Angermann, Renate. (American Museum of Natural History., 2018-01-31)

  This is the first installment of a revision of the didelphid marsupial genus Philander, commonly known as gray four-eyed opossums. Although abundant and widespread in lowland tropical forests from southern Mexico to northern ...

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