A new species and the record of Hemihegetotherium (Notoungulata, Hegetotheriidae) in the Middle to Late Miocene of Patagonia, Argentina

2019 ◽  
Vol 93 ◽  
pp. 23-35 ◽  
Author(s):  
Bárbara Vera
Keyword(s):  
New Species ◽  
Late Miocene ◽  
A New Species

Neogastropod molluscs from the Miocene of western Amazonia, with comments on marine to freshwater transitions in molluscs

2002 ◽  
Vol 76 (2) ◽  
pp. 265-270 ◽  
Author(s):  
Geerat J. Vermeij ◽  
Frank P. Wesselingh
Keyword(s):  
New Species ◽  
Water Level ◽  
Late Miocene ◽  
Southeast Asian ◽  
South American ◽  
Seasonal Fluctuations ◽  
Early Late ◽  
A New Species ◽  
Freshwater Environments

Two neogastropod species occur in brackish intervals in the Pebas Formation (late Middle to early Late Miocene) of Peru and Colombia in western Amazonia. Purpura woodwardi Roxo, 1924, is assigned to Melongena Schumacher, 1817 (Melongenidae), and ?Nassarius reductus (Nassariidae) is recognized as a new species. These gastropods are among the very few marine invaders in the otherwise freshwater Pebas fauna. The small number of marine to freshwater transitions among South American molluscs contrasts with the situation among South American fishes and southeast Asian molluscs. It may be related to seasonal fluctuations in water level and anoxia in present-day South American freshwater environments, as well as to predation and productivity.

scholarly journals A giant termite of the genus Gyatermes from the late Miocene of Nagano Prefecture, Japan (Isoptera)

2015 ◽  
pp. 1
Author(s):  
Michael S. Engel ◽  
Toshiaki Tanaka
Keyword(s):  
New Species ◽  
Late Miocene ◽  
Central Japan ◽  
Nagano Prefecture ◽  
Late Neogene ◽  
Neogene Sediments ◽  
A New Species

A new species of the termite genus <em>Gyatermes</em> Engel &amp; Gross (Archotermopsidae) is described and figured from a beautifully preserved forewing in late Neogene sediments of Nagano Prefecture, central Japan.  The approximately 27-mm long forewing of <em><strong>Gyatermes naganoensis</strong></em> Engel &amp; Tanaka, new species, is preserved in Late Miocene (late Messinian) mudstone of the Ogawa Formation (<em>ca</em>. 6 Ma), and is distinguished from its slightly older and larger congener <em>G. styriensis</em> Engel &amp; Gross, from the early Tortonian of Styria, Austria.  Comments are provided regarding the paleoclimatic implications of a giant termite in the Miocene fauna of Nagano.

A New Primitive Species of the Flat-Headed Peccary Platygonus (Tayassuidae, Artiodactyla, Mammalia) From the Late Miocene of the High Plains

2012 ◽  
Vol 86 (6) ◽  
pp. 1021-1031 ◽  
Author(s):  
Donald R. Prothero ◽  
Jessica Grenader
Keyword(s):  
New Species ◽  
Late Miocene ◽  
High Plains ◽  
Mandibular Symphysis ◽  
Zygomatic Process ◽  
Primitive Species ◽  
A New Species

A new species of the Pliocene–Pleistocene flat-headed peccary, Platygonus pollenae, has been recovered latest Hemphillian (latest Miocene) localities from Nebraska, Kansas, Colorado, and Texas. It can be distinguished from other tayassuids by its distally rounded wing-like zygomatic process, and its subzygodont cheek teeth. In contrast to more derived species of Platygonus, it is much smaller in size, its molars are relatively more bunodont, the talon and talonid cusps are retained on the premolars of most individuals, and the mandibular symphysis lacks a median keel on the chin. In these characters, it is the earliest and the most primitive species of Platygonus known. It is more primitive than the typical Blancan species, or any of the species from the Pleistocene, and demonstrates the origin of this important Pleistocene mammal in the latest Miocene.

Speocarcinus berglundi n. sp. (Decapoda: Brachyura), a new crab from the Imperial Formation (late Miocene-late Pliocene) of southern California

1994 ◽  
Vol 68 (4) ◽  
pp. 800-807 ◽  
Author(s):  
Annette B. Tucker ◽  
Rodney M. Feldmann ◽  
Charles L. Powell
Keyword(s):  
New Species ◽  
Late Miocene ◽  
Southern California ◽  
Late Pliocene ◽  
Riverside County ◽  
Isthmus Of Panama ◽  
The Pacific ◽  
Extant Species ◽  
The Caribbean ◽  
A New Species

Speocarcinus berglundi n. sp. is described from the Imperial Formation in Riverside County, California. Although the Imperial Formation spans late Miocene through late Pliocene time, the part of the unit that bears crabs has been radiometrically dated as late Miocene. The identification of a new species was based upon comparison with four extant species and represents the first documented fossil occurrence for the genus. The occurrence of this new species suggests that the genus may have originated in the Pacific and, during the Miocene, dispersed through the Isthmus of Panama to the Caribbean. Two of the specimens exhibit parasitism by Bopyridae (Isopoda).

Confirmation of a New Species of Small Dasyurid Marsupial by Electrophoretic Analysis of Enzymes and Proteins

1983 ◽  
Vol 31 (5) ◽  
pp. 743 ◽  
Author(s):  
DW Cooper ◽  
A Woolley
Keyword(s):  
New Species ◽  
Genetic Distance ◽  
Electrophoretic Mobility ◽  
Late Miocene ◽  
Electrophoretic Analysis ◽  
Early Pliocene ◽  
Antechinus Stuartii ◽  
A New Species ◽  
Nei's Genetic Distance

Eight species of dasyurid marsupials have been typed for the electrophoretic mobility of 18 of their enzymes and proteins. The species were the Ningbing antechinus (Pseudantechinus sp.), Pseudantechinus macdonnellensis (formerly Antechinus macdonnellensis), Parantechinus apicalis (formerly Antechinus apicalis), Parantechinus bilarni (formerly Antechinus bilarni), Antechinus stuartii, Dasykaluta rosamondae (formerly Antechinus rosamondae), Dasycercus cristicauda and Planigale maculata. The results show that the Ningbing antechinus is a probable new species. The data suggest that its nearest relative is Dasycercus cristicauda. Analysis of the results by calculation of a modified x2 and an approximation to Nei's genetic distance indicates that all species have been the product of one radiation, possibly in the late Miocene or early Pliocene. Two races of P. macdonnellensis probably exist, separable by their transferrin types.

A new species of Leptarctus (Carnivora, Mustelidae) from the Late Miocene of Texas

2001 ◽  
Vol 75 (5) ◽  
pp. 1043-1046 ◽  
Author(s):  
Jong-Deock Lim ◽  
Larry D. Martin ◽  
Robert W. Wilson
Keyword(s):  
New Species ◽  
North America ◽  
Late Miocene ◽  
Inner Mongolia ◽  
Procyon Lotor ◽  
Nasua Nasua ◽  
A New Species

Leptarctus is a poorly known fossil carnivore that ranges through the Miocene of North America and Inner Mongolia, China (Lim, 1996; Zhai, 1964). Though it has been one of the least studied carnivores, more than 20 localities in North America have produced Leptarctus (Lim, 1999). The characters diagnosing Leptarctus as a mustelid include absence of M2, absence of a notch between the blades of the upper carnassial, and a reduced dentition with loss of PI and pi. Though Leptarctus is a mustelid, the teeth bear many similarities to those of procyonids, Procyon lotor and Nasua nasua and stand as a remarkable example of dental convergence (Leidy, 1856; Lim, 1999). Unlike other mustelids, Leptarctus has prominent double sagittal crests, heavy zygomatic arches, a prominent occipital crest, a well-developed hypocone on P4, labially curved upper canines, grooved lower canines, raccoon-like mandibles, elongated metatarsals, and unique bony projections on the tympanic bullae (Lim, 1999).

scholarly journals A New Species of Silverside from the Late Miocene of NW Iran

2011 ◽  
Vol 56 (4) ◽  
pp. 749-756 ◽  
Author(s):  
Giorgio Carnevale ◽  
Enayat Haghfarshi ◽  
Syrous Abbasi ◽  
Habib Alimohammadian ◽  
Bettina Reichenbacher
Keyword(s):  
New Species ◽  
Late Miocene ◽  
Nw Iran ◽  
A New Species

scholarly journals A New Species of Neoglyptatelus (Mammalia, Xenarthra, Cingulata) from the Late Miocene of Uruguay Provides New Insights on the Evolution of the Dorsal Armor in Cingulates

Ameghiniana ◽  
2017 ◽  
Vol 55 (3) ◽  
pp. 233 ◽  
Author(s):  
Juan C. Fernicola ◽  
Andrés Rinderknecht ◽  
Washington Jones ◽  
Sergio F. Vizcaíno ◽  
Kleberson Porpino
Keyword(s):  
New Species ◽  
Late Miocene ◽  
A New Species
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