New species of Agriotherium (Mammalia, Carnivora) from the late Miocene to early Pliocene of central Myanmar

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.

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First record of Toxodontidae (Mammalia, Notoungulata) from the late Miocene–early Pliocene of the southern central Andes, NW Argentina

Journal of Paleontology ◽

10.1017/jpa.2016.160 ◽

2017 ◽

Vol 91 (3) ◽

pp. 566-576 ◽

Cited By ~ 4

Author(s):

Ricardo A. Bonini ◽

Gabriela I. Schmidt ◽

Marcelo A. Reguero ◽

Esperanza Cerdeño ◽

Adriana M. Candela ◽

...

Keyword(s):

New Species ◽

Late Miocene ◽

First Record ◽

Phylogenetic Position ◽

New Taxon ◽

Mandibular Ramus ◽

Early Pliocene ◽

Southern Central ◽

The Right ◽

A New Species

AbstractA new species of toxodontid notoungulate, Xotodon maimarensis n. sp., is described from the Maimará Formation (late Miocene–early Pliocene), Jujuy Province, northwestern Argentina. This is the first record of a toxodontid from the Eastern Cordillera. The specimen is housed at the Museo de Geología, Mineralogía y Paleontología, Instituto de Geología y Minería de la Universidad Nacional de Jujuy. It consists of an incomplete mandible preserving the right mandibular ramus with part of the dental series, partially preserved symphysis with all the incisors, and a small portion of the left ramus without teeth. The following characters distinguish it as a new taxon: symphysis long and narrow with slight divergence of its lateral borders; strong procumbence of lower incisors and deeply implanted i3; chin angle lower than in X. major and X. cristatus and bulging labial keel limiting strong lateral concavities. Comparative analysis in the context of the recently revised Neogene Toxodontidae indicates that the Maimará specimen shares mandibular features and dental characters with Xotodon and Mixotoxodon, differing from the latter by the more upraised symphysis. The phylogenetic position of Xotodon maimarensis n. sp. supports the taxonomic interpretation of the studied specimen as a new species of Xotodon. This new Toxodontidae increases the knowledge of the diversity and radiation of this group of notoungulates in northwest Argentina.

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Total evidence analysis of the phylogenetic relationships of bandicoots and bilbies (Marsupialia: Peramelemorphia): reassessment of two species and description of a new species

Zootaxa ◽

10.11646/zootaxa.4378.2.3 ◽

2018 ◽

Vol 4378 (2) ◽

pp. 224 ◽

Cited By ~ 13

Author(s):

KENNY J. TRAVOUILLON ◽

MATTHEW J. PHILLIPS

Keyword(s):

New Species ◽

Late Miocene ◽

Phylogenetic Relationships ◽

Taxonomic Status ◽

Molecular Data ◽

Total Evidence ◽

Bayesian Analyses ◽

Early Pliocene ◽

Evidence Analysis ◽

A New Species

The phylogenetic relationships of bandicoots and bilbies have been somewhat problematic, with conflicting results between morphological work and molecular data. This conflict makes it difficult to assess the taxonomic status of species and subspecies within this order, and also prevents accurate evolutionary assessments. Here, we present a new total evidence analysis, combining the latest cranio-dental morphological matrix containing both modern and fossil taxa, with molecular data from GenBank. Several subspecies were scored in the morphological dataset to match the molecular data available. Both parsimony and Bayesian analyses were performed, giving similar topologies except for the position of four fossil taxa. Total evidence dating places the peramelemorphian crown origin close to the Oligocene/Miocene boundary, and the radiations of most modern genera beginning in the Late Miocene or Early Pliocene. Our results show that some species and subspecies require taxonomic reassessment, and are revised here. We also describe a new, extinct species from the Nullarbor region. This suggests that the number of recently extinct peramelemorphian species is likely to further increase.

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An exceptional coastal upwelling fish assemblage in the Caribbean Neogene

Journal of Paleontology ◽

10.1017/s0022336000039767 ◽

2001 ◽

Vol 75 (3) ◽

pp. 732-742 ◽

Cited By ~ 3

Author(s):

Orangel Aguilera ◽

Dione Rodrigues de Aguilera

Keyword(s):

New Species ◽

Shallow Water ◽

Deep Water ◽

Late Miocene ◽

Fish Assemblage ◽

Coastal Upwelling ◽

Early Pliocene ◽

The Caribbean ◽

Caribbean Fauna ◽

Ecological Differences

We report the discovery of an extremely rich, previously undescribed Caribbean late Miocene to early Pliocene ichthyofauna represented by one hundred forty species of elasmobranchs and teleosteans from the Cubagua Formation, northeastern Venezuela. The fauna exhibits significant ecological differences compared with common neritic Caribbean Neogene assemblages. The bathymetric distributions of taxa, based on living counterparts, ranges from 0 to 100 m depth. The exceptional co-occurrence of deep water (epipelagic, mesopelagic and benthopelagic), and shallow water (neritic) taxa is best interpreted as the consequence of ocean upwelling in the proximity to the deep-water Cariaco Trench. Patterns of predator and prey are established and corroborate upwelling. Special remarks are made regarding previously unknown late Miocene to early Pliocene Caribbean ichthyofaunas, the absence or rarity of reported fossil taxa in the Recent Caribbean fauna, and a paleo- upwelling indicator (Lampadena jacksoninew species).

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Lagomorphs (Mammalia) from the early Pliocene of Dorkovo, Bulgaria

Fossil Imprint ◽

10.37520/fi.2020.007 ◽

2020 ◽

Vol 76 (1) ◽

pp. 99-117

Author(s):

Sevket Sen

Keyword(s):

New Species ◽

Eastern Europe ◽

Late Miocene ◽

Time Range ◽

Large Mammals ◽

Early Pliocene ◽

Diversity Dynamics

The vertebrate locality of Dorkovo yielded a rich mammalian assemblage of which some large mammals have been studied, but not smaller mammals. The previous investigations correlated this fauna to the early Pliocene (early Ruscinian, MN 14). The present paper describes lagomorph remains which consist of one fragment of mandible and 106 isolated teeth. Four species are identified: Ochotona cf. antiqua, Prolagus sorbinii, Alilepus spassovi n. sp. and Trischizolagus crusafonti. The new species is characterised by the derived pattern of its p3 which has trigonid more stretched, enamel infolding stronger than in any other species of Alilepus, and the p3 lacks anteroflexid. The presence of four species of lagomorphs at Dorkovo is in agreement with the diversity dynamics of lagomorphs toward the end of late Miocene and during the early Pliocene in Eurasia, and in particular in Eastern Europe. The time range of the Dorkovo lagomorphs encompasses the Miocene/Pliocene boundary, and this is in agreement with the previous age assignments, i.e., earliest Pliocene, or early part of MN 14 mammalian zone.

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New Species of Praepusa (Carnivora, Phocidae, Phocinae) from the Netherlands Supports East to West Neogene Dispersal of True Seals / Новый вид Praepusa (Carnivora, Phocidae, Phocinae) из Нидерландов, подтверждающий распростра- нение настоящих тюленей в неогене с востока на запад

Vestnik Zoologii ◽

10.1515/vzoo-2015-0006 ◽

2015 ◽

Vol 49 (1) ◽

pp. 57-66 ◽

Cited By ~ 6

Keyword(s):

New Species ◽

Sexual Dimorphism ◽

The Netherlands ◽

Late Miocene ◽

Middle Miocene ◽

Lateral Wall ◽

Eastern Paratethys ◽

Early Pliocene

Abstract Examination of new fossils (humerus and sacrum) from The Netherlands reveals morphologically-distinctive characters, allowing the description of a new Late Miocene - Early Pliocene representative (Praepusa boeska sp.n.) of the subfamily Phocinae. Diagnostic humeral differences in shape of the coronoid (oval in males vs triangular in females) and depth of the olecranon fossae (shallow in males vs deep in females), as well as the presence of a rounded first ventral foramen and thick lateral wall in the male sacrum, reveal the first evidence of sexual dimorphism in the genus Praepusa. The newly described species adds information on the distribution of true seals, supporting the westward dispersal of this genus across the Paratethys. Strong endemism from closure of the Paratethys, and climatic, geological and stratigraphic diff erences indicate that Praepusa first inhabited the Eastern Paratethys (Early - Middle Miocene, 16.5-13.6 Ma) before dispersing to the Central (Middle Miocene, 13.6-11.2 Ma) and, later, Western (Late Miocene - Early Pliocene, 11.6-3.6 Ma) Paratethys. The Pr. boeska fossils are the youngest to date and have been found the furthest west of any previously described material of this genus. These findings help explain the origin and dispersal among described species of the genus Praepusa in comparison with other genera of the subfamily Phocinae.

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