A new species of bat (Chiroptera: Vespertilionidae) from the early Oligocene global cooling period, Brule Formation, North Dakota, USA

2019 ◽  
Vol 42 (2) ◽  
pp. e2
Author(s):  
Nicholas Czaplewski ◽  
Jeff Person ◽  
Clint Boyd ◽  
Robert Emry
Keyword(s):  
New Species ◽  
North Dakota ◽  
Cooling Period ◽  
Early Oligocene ◽  
Global Cooling ◽  
Brule Formation ◽  
A New Species

First Paleocene Lepidozona (Mollusca: Polyplacophora: Chitonida) from Ukraine

2021 ◽  
Vol 325 (4) ◽  
pp. 379-383
Author(s):  
B.I. Sirenko
Keyword(s):  
New Species ◽  
Late Eocene ◽  
Early Oligocene ◽  
A New Species

A new species Lepidozona luzanovkensis sp. nov. from Paleocene deposits of Ukraine is described. This find is much earlier than the known finds from the late Eocene or Early Oligocene, which increases the age of the genus Lepidozona Pilsbry, 1892 by several million years.

scholarly journals A late-surviving apatemyid (Mammalia: Apatotheria) from the latest Oligocene of Florida, USA

PeerJ ◽  
2015 ◽  
Vol 3 ◽  
pp. e1509 ◽  
Author(s):  
Nicholas J. Czaplewski ◽  
Gary S. Morgan
Keyword(s):  
New Species ◽  
North America ◽  
Coastal Plain ◽  
Eastern North America ◽  
Gulf Coastal Plain ◽  
Early Oligocene ◽  
Alachua County ◽  
The Family ◽  
Distal Edge ◽  
A New Species

A new species of Apatemyidae,Sinclairella simplicidens, is based on four isolated teeth that were screenwashed from fissure fillings at the late Oligocene Buda locality, Alachua County, Florida. Compared to its only congenerSinclairella dakotensis, the new species is characterized by upper molars with more simplified crowns, with the near absence of labial shelves and stylar cusps except for a strong parastyle on M1, loss of paracrista and paraconule on M2 (paraconule retained but weak on M1), lack of anterior cingulum on M1–M3, straighter centrocristae, smaller hypocone on M1 and M2, larger hypocone on M3, distal edge of M2 continuous from hypocone to postmetacrista supporting a large posterior basin, and with different tooth proportions in which M2 is the smallest rather than the largest molar in the toothrow. The relatively rare and poorly-known family Apatemyidae has a long temporal range in North America from the late Paleocene (early Tiffanian) to early Oligocene (early Arikareean). The new species from Florida significantly extends this temporal range by roughly 5 Ma to the end of the Paleogene near the Oligocene-Miocene boundary (from early Arikareean, Ar1, to late Arikareean, Ar3), and greatly extends the geographic range of the family into eastern North America some 10° of latitude farther south and 20° of longitude farther east (about 2,200 km farther southeast) than previously known. This late occurrence probably represents a retreat of this subtropically adapted family into the Gulf Coastal Plain subtropical province at the end of the Paleogene and perhaps the end of the apatemyid lineage in North America.

Evolution of Acmopyle and Dacrycarpus (Podocarpaceae) foliage as inferred from macrofossils in south-eastern Australia

1991 ◽  
Vol 4 (3) ◽  
pp. 449 ◽  
Author(s):  
RS Hill ◽  
RJ Carpenter
Keyword(s):  
New Species ◽  
Climatic Change ◽  
Convergent Evolution ◽  
Leaf Size ◽  
High Latitudes ◽  
South Eastern ◽  
Early Oligocene ◽  
Eastern Australia ◽  
A New Species ◽  
South Eastern Australia

Macrofossil specimens of Dacrycarpus and Acmopyle from south-eastern Australia are investigated. The specimens previously assigned to D. praecupressinus are revised, with one placed in a different genus and new species, Podocarpus witherdenensis, and some placed in a new species, D. latrobensis. One specimen is retained as the lectotype of D. praecupressinus. Dacrycarpus eocenica is re-examined and it is concluded that this species is not Dacrycarpus, but probably belongs to an extinct podocarpaceous genus. Dacrycarpus setiger is transferred to Acmopyle, and three new Acmopyle species, A. florinii, A. glabra and A. tasmanica, are described. It is hypothesised that during the Tertiary in south-eastern Australia stomatal distribution was reduced on Dacrycarpus and Acmopyle foliage. In Dacrycarpus the bilaterally flattened foliage type (which has a greater photosynthetic area than the bifacially flattened foliage) became rare or extinct after the Early Oligocene, prior to the extinction of the genus in the region. Acmopyle has not been recorded in the region after the Early Oligocene. A trend towards reduction in leaf size at high latitudes has previously been demonstrated in angiosperms but not gymnosperms and, along with the reduction of stomatal distribution, probably represents convergent evolution in response to climatic change.

A reassessment of Antarctic polydolopid marsupials (Middle Eocene, La Meseta Formation)

2009 ◽  
Vol 21 (3) ◽  
pp. 285-297 ◽  
Author(s):  
Laura Chornogubsky ◽  
Francisco J. Goin ◽  
Marcelo Reguero
Keyword(s):  
Spatial Distribution ◽  
New Species ◽  
South America ◽  
Middle Eocene ◽  
Early Eocene ◽  
West Antarctica ◽  
Southern South America ◽  
Early Oligocene ◽  
La Meseta Formation ◽  
A New Species

AbstractNew polydolopid marsupial specimens have been recovered from the La Meseta Formation, a late early Eocene to probably early Oligocene unit cropping out in the northern third of Seymour (Marambio) Island, at some 100 km off the northern Antarctic Peninsula. Our review of the original materials, as well as the new specimens from the same levels, led us to: 1) revalidate the genus Antarctodolops Woodburne & Zinsmeister 1984, 2) regard Eurydolops seymouriensis Case, Woodburne & Chaney 1988 as a junior synonym of Antarctodolops dailyi Woodburne & Zinsmeister, and 3) recognize a new species of this same genus: A. mesetaense. As previously stated, the polydolopid radiation might be related to the expansion of the Nothofagus flora, as both have the same spatial distribution in southern South America and West Antarctica.

New lacewings from the Insect Bed (late Eocene) of the Isle of Wight (Neuroptera: Nemopteridae, Chrysopidae, Hemerobiidae)

2019 ◽  
Vol 110 (3-4) ◽  
pp. 397-403
Author(s):  
André NEL ◽  
Edmund A. JARZEMBOWSKI
Keyword(s):  
New Species ◽  
Late Eocene ◽  
Warm Climate ◽  
Isle Of Wight ◽  
Early Oligocene ◽  
A New Species

ABSTRACTNew fossils of the families Nemopteridae and Chrysopidae are recorded and a new species of Hemerobiidae, Sympherobius yulei sp. nov., is described from the late Eocene Insect Bed of the Isle of Wight. The new nemopterid belongs to the tribe Stenonemiini and is very similar to a specimen already recorded from the Early Oligocene of Alsace (France), suggesting that these warm-climate insects were not affected by the ‘Oi-1 Glaciation' cooling.

A new species of the gopher Gregorymys (Rodentia, Geomyidae) from the early Oligocene (Arikareean 1) of southern Mexico

2020 ◽  
Vol 94 (6) ◽  
pp. 1191-1201
Author(s):  
Elizabeth Ortiz-Caballero ◽  
Eduardo Jiménez-Hidalgo ◽  
Victor M. Bravo-Cuevas
Keyword(s):  
Phylogenetic Analysis ◽  
New Species ◽  
North America ◽  
Central America ◽  
Southern Mexico ◽  
Early Oligocene ◽  
Wide Geographic Distribution ◽  
Mexican Species ◽  
A New Species ◽  
Competition For Resources

AbstractA new species of gopher, Gregorymys mixtecorum n. sp., is described from the Arikareean 1 (early Oligocene) of Oaxaca, southern Mexico. Phylogenetic analysis indicates that it is the sister species of G. veloxikua, which was also recently described from southern Mexico. Both species were collected from sediments of the Chilapa Formation that crop out in northwestern Oaxaca. Gregorymys mixtecorum n. sp. and G. veloxikua show differences in size and proportions that possibly reduced competition for resources, exploiting different microhabitats. Both Mexican species represent the oldest and the most southern records of Gregorymys in North America. The Mexican record of Gregorymys suggests that at least some entoptychine rodents diversified in southern Mexico or Central America, and that Geomyidae has had a wide geographic distribution in North America since the early Oligocene.UUID: http://zoobank.org/0f4ad549-2f59-442b-87fa-5c9be0573ea4

Tetranychus sinhai, a New Species of Mite from Grasses (Acarina: Tetranychidae)

1962 ◽  
Vol 94 (9) ◽  
pp. 956-959 ◽  
Author(s):  
Edward W. Baker
Keyword(s):  
New Species ◽  
North Dakota ◽  
Spider Mites ◽  
Undescribed Species ◽  
Department Of Agriculture ◽  
A New Species ◽  
Canadian Department

Recently Dr. R. N. Sinha, of the Canadian Department of Agriculture, sent in for determination some spider mites causing serious damage to barley in Manitoba. Previously this same mite had been collected in North Dakota and Oregon. The mites proved to be an undescribed species of Tetranychus, a genus not usually associated with grasses.

scholarly journals Rodents (Mammalia)from Fitterer Ranch, Brule Formation (Oligocene), North Dakota

2019 ◽  
pp. iv-45 ◽  
Author(s):  
William W. Korth ◽  
Robert J. Emry ◽  
Clint A. Boyd ◽  
Jeff J. Person
Keyword(s):  
North Dakota ◽  
Rodent Species ◽  
Single Specimen ◽  
Early Oligocene ◽  
Land Mammal ◽  
Brule Formation

Korth, William W., Robert J. Emry, Clint A. Boyd, and Jeff J. Person. Rodents (Mammalia) from Fitterer Ranch, Brule Formation (Oligocene), North Dakota. Smithsonian Contributions to Paleobiology, number 103, vi + 45 pages, 17 figures, 15 tables, 1 appendix, 2019.—Eighteen rodent species are recognized from the Fitterer Ranch fauna of North Dakota on the basis of more than a thousand collected specimens. Of the species recognized, four are new: the prosciurine aplodontiids Prosciurus hogansoni and Altasciurus leonardi, the heliscomyid Heliscomys borealis, and the cricetid Eumys lammersi. A previously described castorid from this fauna, Oligotheriomys primus Korth, 1998, is considered a synonym of “Eutypomys” magnus Wood, 1937, on the basis of the recovery of lower dentitions but is retained in the genus Oligotheriomys. A single specimen is questionably referred to Microparamys, a genus elsewhere limited to the Eocene (Clarkforkian-Chadronian land mammal ages). The rodent fauna appears to be a combination of predominantly Orellan and Whitneyan species (early Oligocene), suggesting that the section might transcend the Orellan-Whitneyan boundary. However, the rodent fauna does not alter significantly from the lowest to the highest horizons.

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