scholarly journals Description of a new species of Subepona Dolin et Lozouet, 2004 (Mollusca: Cypraeoidea) from the Lutetian (Middle Eocene) of Hungary

2018 ◽  
Vol 35 (null) ◽  
pp. 103-110
Author(s):  
Jean-Michel Pacaud ◽  
Zoltán Vicián
Keyword(s):  
New Species ◽  
Middle Eocene ◽  
A New Species

scholarly journals A Middle Eocene Shorebird from China

The Condor ◽  
2002 ◽  
Vol 104 (4) ◽  
pp. 896-899 ◽  
Author(s):  
Lianhai Hou ◽  
Per G. P. Ericson
Keyword(s):  
New Species ◽  
Middle Eocene ◽  
Jilin Province ◽  
General Morphology ◽  
The Family ◽  
Charadrius Vociferus ◽  
A New Species

Abstract We describe a new species of shorebird, tentatively referred to the family Charadriidae, from the Huadian Formation (Middle Eocene) in Jilin Province, China. In general morphology the specimen closely matches that of an extant charadriid, and corresponds in size to the Killdeer (Charadrius vociferus). If correctly identified this is the oldest record of the Charadriidae. The Middle Eocene paleoenvironment of the Huadian region is thought to have resembled a subtropical swamp. Un Ave Playera de China del Eoceno Medio Resumen. Describimos una nueva especie de ave playera, tentativamente clasificada como de la Familia Charadriidae, de la Formación Huadian (Eoceno Medio) en la Provincia de Jilin, China. En términos de morfología general, el ejemplar coincide mayormente con la morfología de un charádrido actual, y se asemeja en tamaño a Charadrius vociferus. Si la identificación es correcta, este representa el registro más antiguo para la Familia Charadriidae. El paleoambiente del Eoceno Medio de la región de Huadian se asemejaba probablemente a un pantano subtropical.

Discovery of a new species of the Cretaceous genus Microphorites Hennig, 1971 (Diptera: Dolichopodidae s. lat.) in Paleogene amber from eastern Moravia (Czech Republic)

2016 ◽  
Vol 47 (2) ◽  
pp. 181-193 ◽  
Author(s):  
Michal Tkoč ◽  
André Nel ◽  
Jakub Prokop
Keyword(s):  
Czech Republic ◽  
New Species ◽  
Middle Eocene ◽  
Wing Venation ◽  
Extant Species ◽  
Radial Vein ◽  
Complete Cell ◽  
Geochemical Analyses ◽  
Extinct Genus ◽  
A New Species

A new species of the extinct genusMicrophoritesHennig, 1971 (Dolichopodidae s. lat.: Microphorinae) is described from a single female preserved in Študlov amber (Moravia, Czech Republic), currently dated from the Paleocene to the middle Eocene.Microphorites moravicussp. n. has the typical wing venation of the genus, e.g., three radial veins, crossvein r-m, crossvein bm-cu complete, cell dm, two medial veins and vein CuA1. It differs from the other species ofMicrophoritesby the long antenna, with prolonged and laterally compressed first flagellomere and presence of a pterostigma at the fusion of the first radial vein and costa. A comparison ofM. moravicuswith all other species ofMicrophorites, as well as fossil and extant species ofMicrophorMacquart, 1827 is given. The age and source plant of Študlov amber is discussed in terms of newly performed geochemical analyses.

scholarly journals The first North American Propterodon (Hyaenodonta: Hyaenodontidae), a new species from the late Uintan of Utah

PeerJ ◽  
2019 ◽  
Vol 7 ◽  
pp. e8136 ◽  
Author(s):  
Shawn P. Zack
Keyword(s):  
Phylogenetic Analysis ◽  
New Species ◽  
North American ◽  
Middle Eocene ◽  
North American Species ◽  
New Combination ◽  
Mammalian Fauna ◽  
Critical Interval ◽  
Uinta Basin ◽  
A New Species

The carnivorous mammalian fauna from the Uintan (late middle Eocene) of North America remains relatively poorly documented. This is unfortunate, as this is a critical interval in the transition from “creodont” to carnivoran dominated carnivore guilds. This study reports a new species from the Uinta Formation of the Uinta Basin, Utah, the first North American species of the otherwise Asian hyaenodont genus Propterodon. The new species, Propterodon witteri, represented by a dentary with M2-3 from the late Uintan Leota Quarry, is larger than the well-known P. morrisi and P. tongi and has a larger M3 talonid, but is otherwise very similar. A phylogenetic analysis of hyaenodont interrelationships recovers P. witteri as a hyaenodontine but is generally poorly resolved. A relationship between Hyaenodontinae and Oxyaenoides, recovered by many recent analyses, is not supported. Among the Asian species of Propterodon, P. pishigouensis is reidentified as a machaeroidine oxyaenid and recombined as Apataelurus pishigouensis new combination. Isphanatherium ferganensis may also represent an Asian machaeroidine. Identification of a North American species of Propterodon and an Asian Apataelurus increases the similarity of North American Uintan and Asian Irdinmanhan faunas and suggests that there was substantial exchange of carnivorous fauna during the late middle Eocene.

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.

Taxonomy, distribution, and characters of Pre-Oligocene members of the Cantharus group of Pisaniinae (Neogastropoda: Buccinoidea)

2001 ◽  
Vol 75 (2) ◽  
pp. 295-309 ◽  
Author(s):  
Geerat J. Vermeij
Keyword(s):  
New Species ◽  
New Genus ◽  
Middle Eocene ◽  
Late Eocene ◽  
New Genera ◽  
Paris Basin ◽  
Determinate Growth ◽  
One New Species ◽  
Early Late ◽  
A New Species

This paper presents a review of Cretaceous to Eocene genera and species of the Cantharus group of the buccinoidean neogastropod subfamily Pisaniinae, the description of two new genera and one new species, and a nonphylogenetic discussion of character evolution in this group. The new genus Ickarus is introduced for Tritonidea ickei Martin, 1914, from the Nanggulan beds (middle Eocene) of Java, Indonesia. Editharus (type species: Fusus polygonus Lamarck, 1803, middle Eocene of the Paris Basin, France) is a new genus with seven to nine species ranging from the early to late Eocene of Europe. Editharus is unusual in having a labral tooth formed at the angular junction between the adapical and abapical sectors of the outer lip. Editharus angulilabris from the Marinesian (early late Eocene) is a new species from the Paris Basin closely related to E. polygonus. The incidence and expression of several characters has sharply increased in the Cantharus group from the Paleogene to the Neogene. These characters include the presence of lirae (spiral ridges) on the inner side of the outer lip, the presence of a parietal tooth at the adapical end of the inner lip, and determinate growth (as inferred from a unique adult varix). These trends are also exhibited by other Cenozoic gastropod clades.

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