Durudawirines, a new group of phalangeroid marsupials from the Miocene of Riversleigh, northwestern Queensland

2000 ◽  
Vol 74 (2) ◽  
pp. 327-335 ◽  
Author(s):  
Kirsten Crosby ◽  
Michael Archer
Keyword(s):  
New Genus ◽  
Morphological Difference ◽  
South Australia ◽  
Sister Group ◽  
World Heritage ◽  
Early Miocene ◽  
Late Oligocene ◽  
New Genus And Species ◽  
Molar Morphology

The early Miocene Durudawiri inusitatus new genus and species (Marsupialia: Phalangeroidea) is described from the Riversleigh World Heritage Property in northwestern Queensland. It appears to represent the plesiomorphic sister group of the late Oligocene species of Miralina from South Australia. Its molar morphology is not as complex as that of species of Miralina or ektopodontids, but it is more complex than that of phalangerids. The degree of morphological difference between species of Durudawiri and Miralina suggests subfamilial distinction for the two groups. Strange cusps on the upper molars could be interpreted as either large neometaconules and paraconules, or lingually-displaced metacones and paracones with very large stylar cusps on the buccal shelf.

Anthracotheres from Wadi Moghra, Early Miocene, Egypt

2014 ◽  
Vol 88 (5) ◽  
pp. 967-981 ◽  
Author(s):  
Ellen R. Miller ◽  
Gregg F. Gunnell ◽  
Mohamed Abdel Gawad ◽  
Mohamed Hamdan ◽  
Ahmed N. El-Barkooky ◽  
...  
Keyword(s):  
New Species ◽  
New Genus ◽  
Early Miocene ◽  
New Genus And Species ◽  
Systematic Revision ◽  
Recent Immigrants ◽  
Two New Species

The early Miocene site of Wadi Moghra, Qattara Depression, Egypt, is important for interpreting anthracothere (Mammalia, Artiodactyla) evolution, because the Moghra sediments preserve a higher diversity of anthracotheres than any other pene-contemporaneous site. New specimens from Moghra are described and form the basis for the systematic revision of Moghra anthracotheres provided here. Among the important discoveries recently made at Moghra is the first complete skull of Sivameryx moneyi. Other new specimens described here include two new species of Afromeryx, and a new genus and species, all of which are unique to Moghra. A review of biogeographic information supports the conclusion that three of the Moghra anthracotheres (Brachyodus depereti, B. mogharensis, and Jaggermeryx naida, n. gen. n. sp.) are members of late surviving lineages with a long history in Africa, while three other species (Afromeryx grex, n. sp., A. palustris, n. sp., and Sivameryx moneyi) represent more recent immigrants from Eurasia.

Phylogenetic analysis of the genus Corotoca, with description of a new genus and species from Brazil (Coleoptera, Staphylinidae, Aleocharinae)

2020 ◽  
pp. 1-45
Author(s):  
Bruno Zilberman
Keyword(s):  
Phylogenetic Analysis ◽  
New Species ◽  
Species Identification ◽  
New Genus ◽  
Cladistic Analysis ◽  
Sister Group ◽  
Exhaustive Search ◽  
New Genus And Species ◽  
A New Species

Corotoca is a strictly Neotropical genus of termitophilous beetles associated with termites of genus Constrictotermes. A cladistic analysis based on 13 terminal taxa and 60 characters (57 morphological and three behavioral) was conducted. The exhaustive search with equally weighted characters resulted in two most parsimonious trees with 95 steps. Spirachtha is proposed to be the sister group of the monophyletic “subgroup Corotocae” (Corotoca + Cavifonexus gen. nov.), based on eleven synapomorhphies (ten exclusive and one homoplastic). The monophyly of Corotoca is supported here, including six species associated with Constrictotermes cyphergaster: (Corotoca hitchensi sp. nov + (C. melantho + C. pseudomelantho sp. nov.) + ((C. fontesi + (C. phylo + C. araujoi)). A new genus, Cavifronexus gen. nov., is proposed to two species associated with Constrictotermes cavifrons (Holmgren, 1910): Cavifronexus guyanae comb. nov., from Guyana and Brazil, previously described as Corotoca; and a new species, Cavifronexus papaveroi sp. nov., from Brazil. This work also includes descriptions, redescriptions, and illustrations for all species and genera. Keys for genera and species identification in “subgroup Corotocae” are also provided.

A new characiform fish (Teleostei: Ostariophysi) from the Eocene of Tanzania

2003 ◽  
Vol 40 (4) ◽  
pp. 473-481 ◽  
Author(s):  
Alison M Murray
Keyword(s):  
Fossil Record ◽  
New Genus ◽  
Sister Group ◽  
New Genus And Species ◽  
African Species ◽  
Caudal Skeleton ◽  
Weberian Apparatus ◽  
Fossil Fish

Four specimens of a small fossil fish were collected from the Eocene Mahenge site of Tanzania. The specimens, preserved as part and counterpart natural moulds, are identified, predominantly based on the structure of the caudal skeleton, as members of the Characiformes, probably the sister group to the living African Alestidae. The area just behind the skull, in the two specimens that include this area, is distorted, and therefore it is difficult to identify the bones of the Weberian apparatus, although that structure does appear to be present. The fossil record of characiforms includes few articulated skeletons, with only one other African species previously reported from much younger deposits. The new specimens from Mahenge are described here as a new genus and species, Mahengecharax carrolli.

The earliest mustelid in North America

2019 ◽  
Author(s):  
Ryan Paterson ◽  
Joshua X Samuels ◽  
Natalia Rybczynski ◽  
Michael J Ryan ◽  
Hillary C Maddin
Keyword(s):  
New Species ◽  
North America ◽  
New Genus ◽  
Phylogenetic Analyses ◽  
Morphological Data ◽  
Close Relative ◽  
Late Oligocene ◽  
New Genus And Species ◽  
Holotype Specimen ◽  
John Day

Abstract Until now, the pre-Miocene fossil record of mustelids in North America has been restricted to specimens attributable to oligobunine taxa and isolated remains tentatively allocated to the genus Plesictis. In the present study, we report on a nearly complete cranium and a referred dentary of a new genus and species of mustelid. The specimens were recovered from the Turtle Cove and Kimberly Members of the John Day Formation, Oregon, USA. These excellently preserved specimens more confidently confirm the presence of mustelids in the Early and Late Oligocene (Early and Late Arikareean) of North America. Like the holotype specimen of ‘Plesictis’ julieni, the new species lacks an alisphenoid canal and a postprotocrista on the M1 (synapomorphies of Mustelidae), but retains a dorsally deep suprameatal fossa (a feature occasionally suggested to be unique to Procyonidae). Phylogenetic analyses, applying parsimony and Bayesian inference to combined molecular (five genes totalling 5490 bp) and morphological data, recover this new species of mustelid as sister-species to ‘Plesictis’ julieni. The results of these analyses reveal that the new genus is a close relative of other species of Plesictis and several taxa traditionally allied with Oligobuninae, thereby rendering Oligobuninae paraphyletic. We further discuss the significance of the relatively small size of this new mustelid as it relates to predictions based on increased aridification of the palaeoclimate and the expansion of open habitats in the Oligocene.

scholarly journals Lophiobrycon weitzmani, a new genus and species of glandulocaudine fish (Characiformes: Characidae) from the rio Grande drainage, upper rio Paraná system, southeastern Brazil

2003 ◽  
Vol 1 (1) ◽  
pp. 11-19 ◽  
Author(s):  
Ricardo M. C. Castro ◽  
Alexandre C. Ribeiro ◽  
Ricardo C. Benine ◽  
Alex L. A. Melo
Keyword(s):  
New Species ◽  
Standard Length ◽  
New Genus ◽  
Rio Grande ◽  
Sister Group ◽  
Southeastern Brazil ◽  
Sister Group Relationship ◽  
New Genus And Species ◽  
Dorsal Fin ◽  
Adipose Fin

A new genus and species of glandulocaudine, Lophiobrycon weitzmani, is described based on specimens collected in headwater tributary streams of the rio Grande, upper rio Paraná system, State of Minas Gerais, southeastern Brazil. The inclusion of the new species in the phylogeny of the subfamily Glandulocaudinae proposed by Weitzman & Menezes (1998), reveals a sister group relationship between the new genus and the monophyletic group composed of Glandulocauda and Mimagoniates that currently form the tribe Glandulocaudini. The new species can be readily distinguished from all other species of the tribe by the autapomorphic presence in adult male individuals (with more than 23.9 mm standard length) of an adipose-fin whose base extends for almost the entire distance between the posterior terminus of the base of the dorsal fin and the base of the upper lobe of the caudal fin and averages approximately 25% standard length, along with the presence of globular expansions formed by the lepidotrichia and hypertrophied soft tissue in the middle portions of the first and second pectoral-fin rays. The diagnosis of the tribe Glandulocaudini is modified to accommodate the new genus.

Muribacinus gadiyuli, (Thylacinidae: Marsupialia), a very plesiomorphic thylacinid from the Miocene of Riversleigh, northwestern Queensland, and the problem of paraphyly for the Dasyuridae (Marsupialia)

1996 ◽  
Vol 70 (6) ◽  
pp. 1032-1044 ◽  
Author(s):  
Stephen Wroe
Keyword(s):  
New Genus ◽  
Late Oligocene ◽  
New Genus And Species ◽  
Character Analysis ◽  
Incertae Sedis ◽  
The Family ◽  
Growing Body ◽  
Fossil Data ◽  
New Evidence

A new genus and species of thylacinid, Muribacinus gadiyuli, is described from Miocene deposits of Riversleigh in northwestern Queensland. Muribacinus gadiyuli shares six character states associated with carnassialisation common among thylacinids, but is uniformly less derived for each. The closest affinities of this species lie with another plesiomorphic thylacinid from Riversleigh, Nimbacinus dicksoni. Two previously recognised thylacinid synapomorphies are reconsidered in the light of new evidence. A growing body of molecular and fossil data indicates that the modern dasyurid radiation is a relatively recent phenomenon. Character analysis suggests that no reliable dental synapomorphies define the Dasyuridae at present. It is proposed that a number of plesiomorphic late Oligocene and Miocene taxa previously considered as dasyurids be regarded as Dasyuromorphia incertae sedis pending the identification of shared derived dental characters for the family, or the discovery of more complete material.

A new killifish genus and species from the coastal plains of northeastern Brazil (Teleostei: Cyprinodontiformes: Rivulidae)

Zootaxa ◽  
2004 ◽  
Vol 642 (1) ◽  
pp. 1 ◽  
Author(s):  
WILSON J.E.M. COSTA
Keyword(s):  
New Genus ◽  
Sister Group ◽  
Uncinate Process ◽  
Northeastern Brazil ◽  
Coastal Plains ◽  
New Genus And Species ◽  
Annual Fish ◽  
Distal Process ◽  
Distal Edge ◽  
Ventral Process

Prorivulus auriferus, new genus and species, from the coastal plains of northeastern Brazil, is described. It is a member of a monophyletic unit, including Rivulus and the clade comprising all annual fish rivulid genera, diagnosed by two unambiguous synapomorphies: unossified interhyal and distal process of the second epibranchial absent. Prorivulus is hypothesized to be the sister group of the monophyletic assemblage including Rivulus and the clade comprising all annual fish rivulid genera, which is defined by four unambiguous synapomorphies: shortened uncinate process of the third epibranchial, articular face of the distal edge of first hypobranchial anteriorly expanded, ventral process of angulo-articular narrowed, and posterior flange of cleithrum absent. Prorivulus is distinguished from other basal rivulid taxa by having five branchiostegal rays.

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