Reniporella gordoni, a new genus and species of Bryozoa (Cheilostomata: Steginoporellidae) from the Middle Eocene of Western Kachchh, Gujarat, India, with a note on its significance

2004 ◽  
Vol 2004 (11) ◽  
pp. 681-693 ◽  
Author(s):  
Asit K. Guha ◽  
K. Gopikrishna
Keyword(s):  
New Genus ◽  
Middle Eocene ◽  
New Genus And Species

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.

scholarly journals A new genus and species of Heroini (Perciformes: Cichlidae) from the early Eocene of southern South America

2010 ◽  
Vol 8 (3) ◽  
pp. 631-642 ◽  
Author(s):  
Patricia Alano Perez ◽  
Maria Claudia Malabarba ◽  
Cecilia del Papa
Keyword(s):  
New Genus ◽  
Middle Eocene ◽  
Climatic Conditions ◽  
Lateral View ◽  
South American ◽  
Single Individual ◽  
New Genus And Species ◽  
Dorsal Fin ◽  
The Matrix ◽  
Deep Body

The Lumbrera Formation is the uppermost unit of the Salta Group, which crops out in northwestern Argentina. The paleoenvironment of the Lumbrera Formation is interpreted as a perennial lake deposited under temperate climatic conditions during the early to middle Eocene. Its fossil content is made up of palynomorphs, insects, crocodiles, turtles, lizards, and mammals, besides an ichthyofauna formed by cichlids, poeciliids and dipnoans. †Plesioheros chauliodus is described based on a single individual from this formation, which was fossilized as a lateral view impression (missing anal and caudal fins). It can be distinguished from other cichlids by a moderately deep body, enlarged anterior dentary teeth bearing subapical cusp, a low abdominal vertebral count (10), five canal openings in the dentary, and XI + 12 dorsal-fin rays. A phylogenetic analysis, using the matrix by Kullander (1998), recovered †Plesioheros within Heroini. This species was recovered most closely related to Australoheros and to the deep-bodied South American heroins. The occurrence of an Eocene Heroini, as well as of other cichlid lineages in the same stratigraphical level, is evidence of an ancient diversification in this family. This ancient age supports the hypothesis that the Cichlidae originated on Gondwana.

A New Primate from the Middle Eocene of Myanmar and the Asian Early Origin of Anthropoids

Science ◽  
1999 ◽  
Vol 286 (5439) ◽  
pp. 528-530 ◽  
Author(s):  
J.-J. Jaeger ◽  
Tin Thein ◽  
M. Benammi ◽  
Y. Chaimanee ◽  
Aung Naing Soe ◽  
...  
Keyword(s):  
New Genus ◽  
Middle Eocene ◽  
Sister Group ◽  
New Genus And Species ◽  
Asian Origin ◽  
Anthropoid Primate ◽  
Lower Jaw ◽  
The Family ◽  
Early Origin

A new genus and species of anthropoid primate,Bahinia pondaungensis gen. et sp. nov., is described from the Yashe Kyitchaung locality in the Late Middle Eocene Pondaung Formation (Myanmar). It is related to Eosimias, but it is represented by more complete remains, including upper dentition with associated lower jaw fragment. It is interpreted as a new representative of the family Eosimiidae, which corresponds to the sister group of the Amphipithecidae and of all other anthropoids. Eosimiidae are now recorded from three distinct Middle Eocene localities in Asia, giving support to the hypothesis of an Asian origin of anthropoids.

scholarly journals Winged fruits of rutaceous affinity from the Eocene of western North America

2020 ◽  
Vol 76 (2) ◽  
pp. 211-216
Author(s):  
Steven R. Manchester ◽  
Kory A. Disney ◽  
Kasey K. Pham
Keyword(s):  
North America ◽  
New Genus ◽  
Middle Eocene ◽  
Early Eocene ◽  
Western North America ◽  
New Genus And Species ◽  
Modern Genus ◽  
Trail Formation ◽  
Fruit Surface

A new kind of fin-winged fruit is recognized from lacustrine shales of the early Eocene Tepee Trail Formation of northwestern Wyoming and from the middle Eocene Clarno Formation of central Oregon, USA. The fruits are obovate with five thick lateral wings, borne on a thick pedicel and bearing scars of hypogynous perianth and disk. The fruit surface is covered with small circular dots interpreted as glands. This combination of characters leads us to infer affinities with the Rutaceae, although no identical modern genus is known. We establish the new genus and species, Quinquala obovata.

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 Re-evaluation of the Cancridae Latreille, 1802 (Decapoda: Brachyura) including three new genera and three new species

2000 ◽  
Vol 69 (4) ◽  
pp. 223-250 ◽  
Author(s):  
Carrie E. Schweitzer ◽  
Rodney M. Feldmann
Keyword(s):  
New Species ◽  
New Genus ◽  
Middle Eocene ◽  
Geographic Range ◽  
New Genera ◽  
New Genus And Species ◽  
Generic Level ◽  
The Family ◽  
New Material ◽  
Three New Species

New fossils referable to the Cancridae Latreille, 1802 extend the known stratigraphic range of the family into the middle Eocene and the geographic range into South America. Each genus within the family has been reevaluated within the context of the new material. A suite of diagnostic characters for each cancrid genus makes it possible to assign both extant and fossil specimens to genera and the two cancrid subfamilies, the Cancrinae Latreille, 1802, and Lobocarcininae Beurlen, 1930, based solely upon dorsal carapace morphology. Cheliped morphology is useful in assigning genera to the family but is significantly less useful at the subfamily and generic level. Each of the four subgenera sensu Nations (1975), Cancer Linnaeus, 1758, Glebocarcinus Nations, 1975, Metacarcinus A. Milne Edwards, 1862, and Romaleon Gistl, 1848, are elevated to full generic status. Additionally, three new genera and three new species accommodate the new, as well as some previously described taxa, and include Anatolikos new genus, Anisospinos berglundi new genus and species, and Notocarcinus sulcatus new genus and species and several new combinations. Recognition of new genera and reassignment of several species within the Cancrinae indicates that that subfamily may have arisen in the southern hemisphere, contrary to the previous interpretation of the subfamily as a primarily North Pacific or Tethyan group. The Lobocarcininae was primarily a Tethyan group.

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.

Sign in / Sign up

Export Citation Format

Share Document