• A revision of the didelphid marsupial genus Marmosa. Part 3, A new species from western Amazonia, with redescriptions of M. perplexa Anthony, 1922, and M. germana Thomas, 1904. (American Museum novitates, no. 3969) 

  Voss, Robert S.; Giarla, Thomas C. (New York, NY : American Museum of Natural History, 2021-04-01)

  We describe a new species of woolly mouse opossum from northwestern Amazonia, Marmosa jansae, based on museum specimens previously misidentified either as M. germana Thomas, 1904, or as M. regina Thomas, 1898. Instead of ...
• On the supposed presence of Miocene Tayassuidae and Dromomerycinae (Mammalia, Cetartiodactyla) in South America. (American Museum novitates, no. 3968) 

  Gasparini, Germán M.; Dutra, Rodrigo Parisi; Perini, Fernando A.; Croft, Darin A.; Cozzuol, Mario A.; Missagia, Rafaela V.; Lucas, Spencer G. (New York, NY : American Museum of Natural History, 2021-03-19)

  The earliest record of North American mammals in South America is significant for constraining the timing of intercontinental faunal interchange. At present, the oldest securely dated remains of a North American terrestrial ...
• First report of biofluorescence in Arctic snailfishes and rare occurrence of multiple fluorescent colors in a single species. (American Museum novitates, no. 3967) 

  Gruber, David F.; Sparks, John S. (New York, NY : American Museum of Natural History, 2021-03-18)

  Biofluorescence has recently been reported to be phylogenetically widespread and phenotypically variable across bony fishes, and is most common in tropical coral reef lineages. Here we provide the first documentation of ...
• On the taxonomic identity of Pteronotus davyi incae Smith, 1972 (Chiroptera: Mormoopidae). (American Museum novitates, no. 3966) 

  Pavan, Ana Carolina; Cadenillas, Richard; Centty, Oscar; Pacheco, Víctor; Velasco, Paúl M. (New York, NY : American Museum of Natural History, 2021-03-09)

  The subgenus Pteronotus (naked-backed bats) comprises three species, P. davyi, P. fulvus, and P. gymnonotus, which are distinguished from other members of the genus Pteronotus by wing membranes that are fused along the ...
• A new dromaeosaurid from the Late Cretaceous Khulsan locality of Mongolia (American Museum novitates, no. 3965) 

  Turner, Alan H. (Alan Hamilton); Montanari, Shaena A.; Norell, Mark (American Museum of Natural History., 2021-01-13)

  A new dromaeosaurid dinosaur, Shri devi, from the Late Cretaceous deposit of the Barun Goyot Formation at Khulsan, Mongolia, is described here. The Barun Goyot Formation (herein referred to as the Barun Goyot) is ...
• Cephalopods from the Cretaceous-Paleogene (K-Pg) boundary interval on the Brazos River, Texas, and extinction of the ammonites (American Museum novitates, no. 3964) 

  Witts, James D.; Landman, Neil H.; Garb, Matthew P.; Irizarry, Kayla M.; Larina, Ekaterina; Thibault, Nicolas; Razmjooei, Mohammed J.; Yancey, Thomas E.; Myers, Corinne E. (American Museum of Natural History., 2021-01-13)

  We report on new collections of cephalopods (ammonites and nautilids) from the Cretaceous-Paleogene (K-Pg) successions of the Corsicana and Kincaid formations exposed along the Brazos River in Falls County, Texas. An ...
• A new dichromatic species of Myotis (Chiroptera: Vespertilionidae) from the Nimba Mountains, Guinea (American Museum novitates, no. 3963) 

  Simmons, Nancy B.; Flanders, J.; Bakwo Fils, E. M.; Parker, Guy; Suter, Jamison D.; Bamba, Seinan; Keita, Mamady Kobele; Morales, Ariadna E.; Frick, Winifred F. (American Museum of Natural History., 2021-01-13)

  The genus Myotis is a diverse group of vespertilionid bats found on nearly every continent. One clade in this group, the subgenus Chrysopteron, is characterized by reddish to yellowish fur and, in some cases, visually ...
• 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 ...

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