A New Species of Niptomomys (Microsyopidae) from the Early Eocene of Wyoming

1981 ◽  
Vol 36 (1-2) ◽  
pp. 128-137 ◽  
Author(s):  
Gregg F. Gunnell ◽  
Philip D. Gingerich
Keyword(s):  
New Species ◽  
Early Eocene ◽  
A New Species

A new species of Archaeochrysa Adams (Neuroptera: Chrysopidae) from the early Eocene of Driftwood Canyon, British Columbia, Canada

2014 ◽  
Vol 147 (4) ◽  
pp. 359-369 ◽  
Author(s):  
S. Bruce Archibald ◽  
Vladimir N. Makarkin
Keyword(s):  
British Columbia ◽  
New Species ◽  
Wing Venation ◽  
Early Eocene ◽  
Evolutionary Trends ◽  
Okanagan Highlands ◽  
A New Species

AbstractArchaeochrysa sanikwanew species (Neuroptera: Chrysopidae: Nothochrysinae) is described from early Eocene (Ypresian) Okanagan Highlands shale at Driftwood Canyon, British Columbia, Canada. The evolutionary trends of three chrysopid wing venation characters (the shape of the intramedian cell, the position of the crossvein 2m-cu, and the development of the pseudocubitus) are analysed. The forewing venation of this species is very plesiomorphic compared with the vast majority species of Nothochrysinae, both fossil and extant.

The dentition and relationships of the Paleocene primate Micromomys Szalay, with description of a new species

1984 ◽  
Vol 21 (11) ◽  
pp. 1262-1267 ◽  
Author(s):  
Richard C. Fox
Keyword(s):  
New Species ◽  
Early Eocene ◽  
Late Paleocene ◽  
Early Paleocene ◽  
A New Species

Nearly complete lower dentitions (with c?, p2–4, m1–3) and the first discovered upper dentitions (with P2–4, M1–3) are described and illustrated for the late Paleocene primate Micromomys Szalay. These fossils, from the Paskapoo Formation of central Alberta, Canada, represent a new species, the geologically earliest known species of the genus. Micromomys appears to have been a primitive microsyopid most closely related to the early Paleocene Purgatorius Van Valen and Sloan and the middle Paleocene Palenochtha Gidley; a relationship between Micromomys and the early Eocene Tinimomys Szalay may not be as near as previous workers had supposed.Micromomys is the smallest primate known and was probably insectivorous. Its occurrence with the rare European primate Saxonella Russell, a new, primitive carpolestid, and an unusual mammal possibly related to palaeanodonts documents a facies not yet encountered in other Paleocene mammal local faunas, in Canada or elsewhere.

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.

Zingiberopsis, a fossil genus of the ginger family from Late Cretaceous to early Eocene sediments of Western Interior North America

1978 ◽  
Vol 56 (9) ◽  
pp. 1136-1152 ◽  
Author(s):  
Leo J. Hickey ◽  
Rayma Kempinsky Peterson
Keyword(s):  
New Species ◽  
North America ◽  
Late Cretaceous ◽  
New Combination ◽  
Early Eocene ◽  
Clear Trend ◽  
Late Paleocene ◽  
Fossil Genus ◽  
A New Species

Zingiberopsis attenuata Hickey and Peterson is a new species of monocotyledon from the Paleocene Paskapoo Formation of Alberta. Leaves of this species with their parallel veins grouped into three size sets are intermediate between the Late Cretaceous Zingiberopsis magnifolia (Knowlton) Hickey, new combination, with four discrete sets and Zingiberopsis isonervosa Hickey, of late Paleocene and early Eocene age, with only one set. Zingiberopsis has large, elliptic to ovate leaves with a costa composed of a number of concurrent strands, a set of parallel veins emerging at low angles from the costa, and relatively distantly spaced transverse veins running between adjacent parallel veins. Morphology of the genus matches that of Alpinia in the Zingiberaceae except for greater irregularity of the parallel vein set at and near their origin on the costa and the lack of any evidence of a ligule on the petiole as in Alpinia. Species of Zingiberopsis demonstrate a clear trend toward loss of the wider parallel vein subsets over the approximately 20-million-year range of the genus. In addition, the overlooked character of the arrangement of the parallel vein subsets across the width of the leaf may have potential in the taxonomic determination of monocotyledonous leaves.

scholarly journals A new species of <i>Somalina (Somalina hottingeri)</i> with partially vacuolate lateral walls from the Middle Eocene of Oman

1997 ◽  
Vol 16 (2) ◽  
pp. 131-135 ◽  
Author(s):  
M. R. White
Keyword(s):  
New Species ◽  
Middle Eocene ◽  
Wall Structure ◽  
Early Eocene ◽  
A New Species ◽  
Lateral Walls

Abstract. Somalina hottingeri, a new species with partially vacuolate lateral walls is described from the Middle Eocene of Oman. It is distinguished from the only previously recorded species with this wall structure (S. transitorius (Hottinger)) by having equatorial chambers that are relatively low throughout the test. On the basis of this character, it is suggested that S. hottingeri evolved from the Opertorbitolites douvillei Group (redefined here) and that it gave rise to the true somalines. S. transitorius is regarded as arising from O. latimarginalis (ex. O. latimarginalis Group, introduced in this study) but not to have given rise to any other species.Since forms of Somalina with only partially vacuolate walls appear to be confined to the late Early Eocene to early Middle Eocene, it is concluded that the presence of this wall structure provides a useful stratigraphic marker.

New marsupial from the early Eocene of Virginia

2010 ◽  
Vol 84 (3) ◽  
pp. 561-565 ◽  
Author(s):  
Kenneth D. Rose
Keyword(s):  
New Species ◽  
North America ◽  
Coastal Plain ◽  
Atlantic Coastal Plain ◽  
Early Eocene ◽  
European Species ◽  
Atlantic Coastal ◽  
A New Species

A new species of the marsupial Peradectes is described from the early Eocene Nanjemoy Formation of Virginia. It is the first Tertiary marsupial known from the Atlantic Coastal Plain north of Florida. The smallest species of Peradectes, it is more closely related to species known from the Western Interior of North America than to contemporaneous European species.

scholarly journals Formica species (Hymenoptera, Formicidae, Formicinae) in late Eocene Rovno amber

2021 ◽  
Vol 82 ◽  
pp. 237-251
Author(s):  
Alexander G. Radchenko ◽  
Evgeny E. Perkovsky ◽  
Dmitry V. Vasilenko
Keyword(s):  
New Species ◽  
North America ◽  
Middle Eocene ◽  
Late Eocene ◽  
Rovno Amber ◽  
Early Eocene ◽  
Incertae Sedis ◽  
A New Species ◽  
Maxillary Palps

A new species, Formica ribbeckei Radchenko &amp; Perkovsky, sp. nov., is described based on four workers from late Eocene Rovno amber (Ukraine). It most resembles F. flori Mayr, 1868 but differs from the latter mainly by the 5-segmented maxillary palps with the preapical segment subequal in length to the apical one, and by the shorter first funicular segment. Fossil F. luteola Presl, 1822, F. trigona Presl, 1822, F. macrognatha Presl, 1822 and F. quadrata Holl, 1829 are considered incertae sedis in Formicidae. Thus, ten valid Formica Linnaeus, 1758 species (including F. ribbeckei) are known now from late Eocene European ambers. The diversity of Formica in the early and middle Eocene deposits of Eurasia and North America is considered. It is assumed that the genus Formica most likely arose in the early Eocene.

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