• First known extant species of Alavesia (Diptera: Atelestidae) in the Neotropical region : Alavesia leukoprosopa, sp. nov., from the southern Atlantic Forest, Brazil (American Museum novitates, no. 3962) 

  Amorim, Dalton de Souza; Riccardi, Paula Raile; Rafael, José Albertino (American Museum of Natural History., 2020-10-06)

  A first known extant Neotropical species of the atelestid genus Alavesia--Alavesia leukoprosopa, sp. nov.--is described from southeastern Brazil. The holotype (and only specimen so far) was collected with a Malaise trap ...
• Cretaceous diversity of the relict genus Alavesia Waters and Arillo (Diptera: Empidoidea: Atelestidae) (American Museum novitates, no. 3961) 

  Sinclair, Bradley J.; Grimaldi, David A. (American Museum of Natural History., 2020-10-06)

  Alavesia has been known on the basis of five species in Late Cretaceous amber from Spain and Myanmar and two extant species from Namibia. Very recently, another extant species has been found in southern Brazil. Here we ...
• On the identity of Victoria's Mouse Opossum, Marmosa regina Thomas, 1898 (American Museum novitates, no. 3960) 

  Giarla, Thomas C.,; Voss, Robert S. (American Museum of Natural History., 2020-09-10)

  Phylogenetic analyses of molecular sequence data obtained from the holotype of Marmosa regina Thomas, 1898, together with a reassessment of its morphological characters indicate that this species does not belong to the ...
• Taxonomic revision of Camarochilus Harris (Hemiptera: Pachynomidae). (American Museum novitates, no. 3959) 

  Weirauch, Christiane; Forero, Dimitri; Schuh, Randall T. (American Museum of Natural History., 2020-09-08)

  The Neotropical genus Camarochilus Harris, 1930 (Hemiptera: Pachynomidae) was described based on two species from Panama and Brazil. The genus has not been revised since its original treatment, and specimens beyond the ...
• Systematics of neotropical spiny mice, genus Neacomys Thomas, 1900 (Rodentia: Cricetidae), from southeastern Amazonia, with descriptions of three new species. (American Museum novitates, no. 3958) 

  Semedo, Thiago Borges Fernandes; Da Silva, Maria Nazareth F.; Gutiérrez, Eliécer E.; Ferreira, Daniela Cristina; Nunes, Mario Da Silva; Mendes-Oliveira, Ana C.; Farias, Izeni Pires; Rossi, Rogério V. (American Museum of Natural History., 2020-09-05)

  Species of Neacomys are small cricetid rodents that occur in forested habitats of Central and South America, from eastern Panama to central Bolivia and central/western Brazil. In order to assess species diversity of this ...
• 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 ...

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