• Eomakhaira molossus, a new saber-toothed sparassodont (Metatheria: Thylacosmilinae) from the early Oligocene (?Tinguirirican) Cachapoal locality, Andean Main Range, Chile. (American Museum novitates, no. 3957) 

  Engelman, Russell K.; Flynn, John J. (John Joseph), 1955-; Wyss, André R.; Croft, Darin A. (American Museum of Natural History., 2020-07-17)

  Thylacosmiline sparassodonts (previously recognized as thylacosmilids) are among the most iconic groups of endemic South American Cenozoic mammals due to their distinctive morphology and convergent resemblance to saber-toothed ...
• Reconstructing the specimens and history of Howe Quarry (Upper Jurassic Morrison Formation; Wyoming). (American Museum novitates, no. 3956) 

  Tschopp, Emanuel; Mehling, Carl; Norell, Mark (American Museum of Natural History., 2020-06-24)

  In 1934, Barnum Brown of the American Museum of Natural History in New York (AMNH) led a large-scale dinosaur excavation in northern Wyoming, where he had found bones two years earlier. Initially, Brown expected to excavate ...
• A revision of Philander (Marsupialia: Didelphidae). Part 2, phylogenetic relationships and morphological diagnosis of P. nigratus Thomas, 1923. (American Museum novitates, no. 3955) 

  Voss, Robert S.; Giarla, Thomas C. (American Museum of Natural History., 2020-06-24)

  Newly available molecular sequences and morphological data suggest that Philander nigratus Thomas, 1923, is a valid species. Currently known from just eight specimens collected in the Peruvian departments of Junín and ...
• Review of the genus Wroughtonia Cameron, 1899 (Hymenoptera, Braconidae, Helconinae), with the description of 12 new species from Vietnam. (American Museum novitates, no. 3953) 

  Khúât, Đăng Long; Achterberg, C. van.; Carpenter, James M. (James Michael), 1956-; Nguyen, Thi Oanh (New York, NY : American Museum of Natural History, 2020-06-16)

  The genus Wroughtonia Cameron (Hymenoptera, Braconidae, Helconinae) is reviewed. Twelve new species of the genus Wroughtonia are described and illustrated: Wroughtonia angularis, sp. nov.; W. aspera, sp. nov.; W. coffeana, ...
• A new genus of Late Cretaceous angel shark (Elasmobranchii; Squatinidae), with comments on squatinid phylogeny. (American Museum novitates, no. 3954) 

  Maisey, John G.; Ehret, Dana J.; Denton, John S. S. (New York, NY : American Museum of Natural History, 2020-06-16)

  Three-dimensional Late Cretaceous elasmobranch endoskeletal elements (including palatoquadrates, ceratohyals, braincase fragments, and a series of anterior vertebrae) are described from the Late Cretaceous University of ...
• The late middle Miocene Mae Moh Basin of northern Thailand: the richest Neogene assemblage of Carnivora from Southeast Asia and a paleobiogeographic analysis of Miocene Asian carnivorans. (American Museum novitates, no. 3952) 

  Grohé, Camille; Bonis, Louis de; Yaowalak, Chaimanee; Chavasseau, Olivier; Rugbumrung, Mana; Yamee, Chotima; Suraprasit, Kantapon; Gibert, Corentin; Surault, Jérôme; Blondel, Cécile; Jaeger, Jean-Jacques (American Museum of Natural History., 2020-06-03)

  The late middle Miocene fossil-bearing lignite zones of the Mae Moh Basin, northern Thailand, have yielded a rich vertebrate fauna, including two species of Carnivora described thus far: the bunodont otter Siamogale ...
• A new species of Trichogenes (Siluriformes, Trichomycteridae), with a discussion on the homologies of the anterior orbital bones in trichomycterids and other loricarioids. (American Museum novitates, no. 3951) 

  Pinna, Mário C. C. de.; Reis, Vinícius (Vinícius José Carvalho); Britski, Heraldo A. (American Museum of Natural History., 2020-04-23)

  A new species of the rare genus Trichogenes is reported on the basis of specimens without locality and other associated data. The obvious distinctiveness, taxonomic relevance, and phylogenetic importance of the new taxon ...
• A species-level phylogeny of Old World fruit bats with a new higher-level classification of the Family Pteropodidae. (American Museum novitates, no. 3950) 

  Almeida, Francisca Cunha.; Simmons, Nancy B.; Giannini, Norberto P. (American Museum of Natural History., 2020-04-13)

  Old World fruit bats (Chiroptera: Yinpterochiroptera: Pteropodidae) are a diverse radiation endemic to the tropics of Africa, Asia, Australia, and nearby island archipelagos. Recent molecular analyses have provided ...
• Phylogeography, species limits, phylogeny, and classification of the turacos (Aves, Musophagidae) based on mitochondrial and nuclear DNA sequences. (American Museum novitates, no. 3949) 

  Perktaş, Utku.; Groth, Jeffrey G.; Barrowclough, George F. (American Museum of Natural History., 2020-04-03)

  We used mitochondrial and nuclear DNA sequences to examine patterns of differentiation and evolution in the Musophagidae, an avian family endemic to sub-Saharan Africa; attention was focused on the subfamily Musophaginae, ...
• South American Disteniini (Disteniidae, Coleoptera) : new species and new distribution records. (American Museum novitates, no. 3948) 

  Botero, Juan Pablo.; Gutiérrez, Nayeli. (American Museum of Natural History., 2020-03-12)

  Two new species of Disteniini are described: Novantinoe apiculatra from Colombia and Paracometes viridis from Peru (new country record for the genus). An updated key and a geographical distribution map for species of ...
• Hybridization between whiptail lizards in Texas : Aspidoscelis laredoensis and A. gularis, with notes on reproduction of a hybrid. (American Museum novitates, no. 3947) 

  Cole, Charles J.; Dessauer, Herbert C.; Paulissen, Mark A.; Walker, James M. (James Martin) (American Museum of Natural History., 2020-03-06)

  Karyotypes and allozyme data for 32 genetic loci overwhelmingly support the conclusion that Aspidoscelis laredoensis is a diploid all-female species that had a hybrid origin between A. gularis x A. sexlineatus. Comparisons ...
• DNA sequence data from the holotype of Marmosa elegans coquimbensis Tate, 1931 (Mammalia, Didelphidae) resolve its disputed relationships. (American Museum novitates, no. 3946) 

  Giarla, Thomas C.; Voss, Robert S. (American Museum of Natural History., 2020-02-28)

  DNA sequence data obtained from the 96 year old holotype of Marmosa elegans coquimbensis Tate, 1931, support the hypothesis that this nominal taxon is a synonym or subspecies of Thylamys elegans (Waterhouse, 1839) and is ...
• Two new deep-sea species of burrowing anemones (Cnidaria, Actiniaria, Edwardsiidae) from Whittard Canyon off the southwestern coast of Ireland. (American Museum novitates, no. 3945) 

  Gusmão, Luciana Câmara, 1981-; Qu, Cherie.; Burke, Sadie L.; Rodríguez, Estefania. (American Museum of Natural History., 2020-02-12)

  Burrowing sea anemones have a simple morphology with an elongate body and a round aboral end that anchors the animal into mud, sand, or gravel, leaving only the tentacle crown exposed. Edwardsiids are easily differentiated ...
• The guardstone spiders of the Phrurotimpus palustris group (Araneae, Phrurolithidae). (American Museum novitates, no. 3944) 

  Platnick, Norman I. (American Museum of Natural History., 2019-12-09)

  The type species of Phrurotimpus, Herpyllus alarius Hentz, was based on a female from Alabama; because Hentz's type specimens were destroyed long ago, the identity of this species has been controversial for over a century. ...
• The first Tertiary fossils of mammals, turtles, and fish from Canada's Yukon. (American Museum novitates, no. 3943) 

  Eberle, Jaelyn.; Hutchison, J. Howard (John Howard), 1939-; Kennedy, Kristen.; Koenigswald, Wighart von.; MacPhee, R. D. E.; Zazula, Grant D. (American Museum of Natural History., 2019-10-31)

  Despite over a century of prospecting and field research, fossil vertebrates are exceedingly rare in Paleogene and Neogene rocks in northern Canada's Yukon Territory. Here, we describe the first records of probable Neogene ...
• Nest architecture, immature stages, and ethnoentomology of a new species of Trigonisca from northern Colombia (Hymenoptera, Apidae). (American Museum novitates, no. 3942) 

  Engel, Michael S.; Rozen, Jerome G., Jr. (Jerome George), 1928-; Sepúlveda-Cano, Paula A.; Smith, Corey Shepard.; Thomas, Jennifer C.; Ospina Torres, Rodulfo.; González, Víctor H. (American Museum of Natural History., 2019-10-18)

  Stingless bees (Apinae: Corbiculata: Meliponini) are biologically and culturally important pollinators within the tropical and subtropical areas of the world. However, limited information is available for the majority of ...
• An unexpected new Poropanchax (Cyprinodontiformes, Procatopodidae) from the Kongo Central Province, Democratic Republic of Congo. (American Museum novitates, no. 3941) 

  Van der Zee, Jouke R.; Bernotas, Kimberly.; Bragança, Pedro H. N.; Stiassny, Melanie L. J. (American Museum of Natural History., 2019-10-10)

  A new procatopodid, assigned to the genus Poropanchax, is described from a wetland habitat located adjacent to the Inga Falls in Lower Congo. Poropanchax pepo, new species, is distinguished from all congeners by a combination ...
• Egg and mature larva of a species of Plebeia with a preliminary overview of the mature larvae of the Meliponini relative to those of other corbiculate taxa (Apoidea, Apidae). (American Museum novitates, no. 3940) 

  Rozen, Jerome G., Jr. (Jerome George), 1928-; Smith, Corey Shepard.; Roubik, David W. (David Ward), 1951- (American Museum of Natural History., 2019-09-27)

  The egg and mature larva of a presently unnamed species of the bee genus Plebeia are anatomically described, illustrated, and compared with those of other known Meliponini, based on abundant specimens collected from two ...
• Larval anatomy of the bee Tetragonula sapiens (Cockerell) (Meliponini) ; Further on the larva of Melipona fallax Camargo and Pedro, with a preliminary characterization of mature larval Meliponini ; and Analysis of multipronged spicules (Apoidea, Apidae). (American Museum novitates, no. 3939) 

  Rozen, Jerome G., Jr. (Jerome George), 1928-; Smith, Corey Shepard.; Archbold Expedition to New Guinea (7th : 1964) (American Museum of Natural History., 2019-09-27)

  The small (length less than 6 mm) postdefecating larva of Tetragonula (Tetragonula) sapiens (Cockerell) from the Huon Peninsula, Papua New Guinea is described and illustrated, the first representation of the immature stage ...
• New species of Cerambycinae and Lamiinae (Cerambycidae, Coleoptera) from Mexico. (American Museum novitates, no. 3938) 

  Noguera, Felipe A. (Felipe Arturo); Gutiérrez, Nayeli. (American Museum of Natural History., 2019-09-20)

  Four new species of longhorn beetles (Cerambycidae, Coleoptera) from Mexico are described herein. Three are in the subfamily Cerambycinae: Aphysotes santossilvai, sp. nov., from Veracruz (new country record for the genus), ...

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