A New Genus and Species of Freshwater Stingray (Myliobatiformes, Dasyatoidea) from the Latest Middle Eocene of Utah, U.S.A.

2014 ◽  
Vol 88 (3) ◽  
pp. 497-503 ◽  
Author(s):  
Todd D. Cook ◽  
Jeffrey G. Eaton ◽  
Michael G. Newbrey ◽  
Mark V. H. Wilson
Keyword(s):  
Fossil Record ◽  
New Genus ◽  
Middle Eocene ◽  
Late Eocene ◽  
New Genus And Species ◽  
Green River ◽  
Lower Eocene ◽  
Head Formation ◽  
Freshwater Stingray ◽  
Crown Morphology

Teeth of a new freshwater dasyatoid ray recovered from the latest middle Eocene Brian Head Formation of southern Utah represent the youngest freshwater stingray so far known in the fossil record of North America. The crown morphology ofSaltirius utahensisn. gen. n. sp. exhibits strong sexual dimorphism, with the presumed males bearing two prominent margino-labial protuberances and a bifid cusp that produces a saltire-like outline. This unique crown separates this genus and species from any known extinct or extant myliobatiform, but does have some resemblance to the crown ofAsterotrygon maloneyifrom the lower Eocene Green River Formation of Wyoming. The occurrence ofS. utahensisin the Brian Head Formation provides additional evidence for the persistence of warm subtropical temperatures during the late Eocene in southern Utah.

A new genus and species of spoon-winged lacewing from the Cretaceous Crato Formation in Brazil (Neuroptera: Nemopteridae)

2020 ◽  
Vol 3 (4) ◽  
pp. 338-341
Author(s):  
ANDRÉ NEL ◽  
CRISTIAN PELLA
Keyword(s):  
Early Cretaceous ◽  
Fossil Record ◽  
New Genus ◽  
Late Eocene ◽  
New Genus And Species ◽  
Burmese Amber ◽  
Early Oligocene ◽  
Stem Group

The lacewing family Nemopteridae Burmeister, 1839 is very poorly represented in the fossil record with three Early Cretaceous genera of uncertain affinities from the Brazilian Crato Formation, one ‘mid’-Cretaceous representative of the stem group of the Crocinae Navás, 1910 in the Burmese amber, and two Cenozoic nemopterine genera Marquettia Navás, 1913 (late Eocene-early Oligocene) and Paleonemia Claisse et al., 2019 (middle Oligocene). Also two undetermined Nemopterinae are recorded from the late Eocene and the Oligocene (Lu et al., 2019a: Table 1; Claisse et al., 2019).

A new hoverfly genus and species from the middle Eocene Baltic amber (Diptera: Syrphidae)

2020 ◽  
Vol 3 (1) ◽  
pp. 068-075
Author(s):  
VALÉRIE NGÔ-MULLER ◽  
ANDRÉ NEL
Keyword(s):  
Late Cretaceous ◽  
Fossil Record ◽  
New Genus ◽  
Middle Eocene ◽  
The Other ◽  
Baltic Amber ◽  
New Genus And Species ◽  
Stem Lineage ◽  
Syrphid Flies ◽  
The Baltic

Syrphid flies are an important clade of pollinators, and predators on several insect groups. The oldest record of its stem lineage is late Cretaceous, but this family really diversified during the Eocene-Oligocene, with a rather sparse fossil record. Here we describe from the Baltic amber the new genus and species Eoxanthandrus garroustei gen. et sp. nov., the first fossil representative of the Syrphinae ‘group’ Bacchini and Melanostomini. Its closest extant relatives prey on caterpillars, while the other Syrphinae generally prey on Hemiptera. This specialized biology possibly dates back to the middle Eocene.

scholarly journals A fossil unicorn crestfish (Teleostei, Lampridiformes, Lophotidae) from the Eocene of Iran

PeerJ ◽  
2017 ◽  
Vol 5 ◽  
pp. e3381 ◽  
Author(s):  
Donald Davesne
Keyword(s):  
Deep Sea ◽  
Fossil Record ◽  
New Genus ◽  
Late Eocene ◽  
Taxonomic Composition ◽  
New Taxon ◽  
Zagros Basin ◽  
New Genus And Species ◽  
Close Relationship ◽  
Early Cenozoic

Lophotidae, or crestfishes, is a family of rare deep-sea teleosts characterised by an enlarged horn-like crest on the forehead. They are poorly represented in the fossil record, by only three described taxa. One specimen attributed to Lophotidae has been described from the pelagic fauna of the middle-late Eocene Zagros Basin, Iran. Originally considered as a specimen of the fossil lophotid †Protolophotus, it is proposed hereby as a new genus and species †Babelichthys olneyi, gen. et sp. nov., differs from the other fossil lophotids by its relatively long and strongly projecting crest, suggesting a close relationship with the modern unicorn crestfish,Eumecichthys. This new taxon increases the diversity of the deep-sea teleost fauna to which it belongs, improving our understanding of the taxonomic composition of the early Cenozoic mesopelagic ecosystems.

A fossil caddisfly (Insecta: Trichoptera) from the Eocene of Colorado

Zootaxa ◽  
2018 ◽  
Vol 4403 (2) ◽  
pp. 389
Author(s):  
JASON L. ROBINSON ◽  
M. JARED THOMAS ◽  
SAM W. HEADS
Keyword(s):  
Body Size ◽  
New Genus ◽  
Green River Formation ◽  
New Genus And Species ◽  
Green River ◽  
Lower Eocene ◽  
Adult Body Size ◽  
Adult Body ◽  
Terminal Genitalia ◽  
Large Adult

A new genus and species of fossil caddisfly (Insecta: Trichoptera) from the Lower Eocene (Ypresian) Green River Formation of Colorado is described. Litholimnephilops yinani gen. et sp. nov. is the first adult caddisfly to be described from the Green River Formation, and is characterized by large adult body size, presence of ocelli, dark leg spines, and a lack of terminal crossveins in the anterior anastomosis region of the forewings. Terminal genitalia are not visible in the preserved specimen. Familial placement is uncertain, though similarities with the families Limnephilidae and Phryganeidae are observed. 

scholarly journals New phiocricetomyine rodents (Hystricognathi) from the Jebel Qatrani Formation, Fayum Depression, Egypt

PeerJ ◽  
2021 ◽  
Vol 9 ◽  
pp. e12074
Author(s):  
Shorouq F. Al-Ashqar ◽  
Erik R. Seiffert ◽  
Dorien de Vries ◽  
Sanaa El-Sayed ◽  
Mohamed S. Antar ◽  
...  
Keyword(s):  
New World ◽  
New Genus ◽  
Late Eocene ◽  
Type Locality ◽  
New Genus And Species ◽  
Additional Material ◽  
Early Oligocene ◽  
Species Type ◽  
The Rich ◽  
Latest Eocene

Background The rich rodent assemblages from the Eocene–Oligocene deposits of the Jebel Qatrani Formation (Fayum Depression, Egypt) have important implications for our understanding of the origin and paleobiogeography of Hystricognathi, a diverse clade that is now represented by the Afro-Asiatic Hystricidae, New World Caviomorpha, and African Phiomorpha. Methods Here we present previously undescribed material of the enigmatic hystricognath clade Phiocricetomyinae, from two stratigraphic levels in the lower sequence of the Jebel Qatrani Formation—a new genus and species (Qatranimys safroutus) from the latest Eocene Locality 41 (~34 Ma, the oldest and most productive quarry in the formation) and additional material of Talahphiomys lavocati from that species’ type locality, early Oligocene Quarry E (~31–33.2 Ma). Results The multiple specimens of Qatranimys safroutus from L-41 document almost the entire lower and upper dentition, as well as mandibular fragments and the first cranial remains known for a derived phiocricetomyine. Specimens from Quarry E allow us to expand comparisons with specimens from Libya (late Eocene of Dur at-Talah and early Oligocene of Zallah Oasis) that have been placed in T. lavocati, and we show that the Dur at-Talah and Zallah specimens do not pertain to this species. These observations leave the Fayum Quarry E as the only locality where T. lavocati occurs.

scholarly journals New Genus and Species of Gall Midges (Diptera, Cecidomyiidae, Porricondylinae, Holoneurini) from the Late Eocene Amber of Olevsk (Zhitomir Region, Ukraine)

2017 ◽  
Vol 51 (1) ◽  
pp. 23-30 ◽  
Author(s):  
Z. A. Fedotova ◽  
E. E. Perkovsky
Keyword(s):  
New Species ◽  
New Genus ◽  
Late Eocene ◽  
Rovno Amber ◽  
New Genus And Species ◽  
Gall Midges ◽  
Two New Species ◽  
First Time ◽  
Eocene Amber

Abstract Gall midges are reported for the first time in Late Eocene Rovno amber from the Olevsk, Zhitomir Region. This is the second amber locality to yield gall midges in the Zhitomir Region, after Gulyanka. Rovnoholoneurus gen. n. and two new species, Rovnoholoneurus davidi sp. n. and R. miyae sp. n. are described. Bryocrypta laqueata Fedotova, 2005 is transferred to the genus Rovnoholoneurus, and Rovnoholoneurus laqueatus (Fedotova, 2005), comb. n. is established. A key to the species of Rovnoholoneurus is provided.

New Uintasoricine (?Primates, Plesiadapiformes) From the Earliest Bridgerian, Latest Early Eocene of Wyoming

2012 ◽  
Vol 86 (6) ◽  
pp. 973-978 ◽  
Author(s):  
Gregg F. Gunnell
Keyword(s):  
North America ◽  
New Genus ◽  
Middle Eocene ◽  
Field Work ◽  
Biodiversity Hotspot ◽  
Individual Species ◽  
Early Eocene ◽  
New Genus And Species ◽  
Body Weights ◽  
New Form

Uintasoricines are diminutive plesiadapiforms that are found in the latest Paleocene through middle Eocene, predominantly in North America. They are not a diverse group but individual species may be locally abundant and they are a persistent element of the plesiadapiform radiation in North America surviving over a span of approximately 16 million years. Recent field work in southern Wyoming at South Pass has led to the discovery of a new genus and species of uintasoricine. The new form is smaller in tooth dimensions compared to other known uintasoricines, being slightly smaller thanUintasorex montezumicusfrom California. Both the newly described taxon andU. montezumicusare among the smallest plesiadapiforms yet known with body weights estimated to be 20 to 25 g. The sediments of the Cathedral Bluffs Tongue of the Wasatch Formation at South Pass contain a unique upland fauna—the presence of a distinctive uintasoricine in this assemblage adds further evidence to support the notion that this upland environment was a biodiversity hotspot during the latest early Eocene.

Sign in / Sign up

Export Citation Format

Share Document