New Material of the Hominoid Ouranopithecus macedoniensis from the Late Miocene of the Axios Valley (Macedonia, Greece) with Some Remarks on Its Sexual Dimorphism

2016 ◽  
Vol 87 (2) ◽  
pp. 94-122 ◽  
Author(s):  
George D. Koufos ◽  
Louis de Bonis ◽  
Dimitris Kugiumtzis
Keyword(s):  
Sexual Dimorphism ◽  
Late Miocene ◽  
New Material

scholarly journals Sexual Dimorphism in Perissodactyl RhinocerotidChilotherium wimanifrom the Late Miocene of the Linxia Basin (Gansu, China)

2010 ◽  
Vol 55 (4) ◽  
pp. 587-597 ◽  
Author(s):  
Shaokun Chen ◽  
Tao Deng ◽  
Sukuan Hou ◽  
Qinqin Shi ◽  
Libo Pang
Keyword(s):  
Sexual Dimorphism ◽  
Late Miocene ◽  
Linxia Basin

scholarly journals Carnivora from the Baynunah Formation

2021 ◽  
Author(s):  
Camille Grohe
Keyword(s):  
Late Miocene ◽  
Arabian Peninsula ◽  
Coastal Region ◽  
Abu Dhabi ◽  
Abu Dhabi Emirate ◽  
Postcranial Remains ◽  
New Material

I describe new specimens of carnivoran mammals from the continental late Miocene Baynunah Formation, exposed in the western coastal region of Abu Dhabi Emirate. New material collected between 2002 and 2014 includes dental specimens of the mustelid Plesiogulo sp. and a large-sized hyaenid, postcranial remains and an upper canine of a large- sized machairodontine felid, postcrania and a tooth of a medium-sized felid, and postcrania of a medium-sized mustelid. The latter two are new taxonomic records for the Baynunah Formation. With a minimum of six species, the carnivoran assemblage from the Baynunah Formation is the richest known from the Miocene of the Arabian Peninsula.

scholarly journals Turtles of the genus Sakya (Geoemydidae): new material from the late Miocene of Russia and Ukraine, new taxonomic diversity and expansion of the stratigraphic range

2015 ◽  
Author(s):  
Elena Syromyatnikova ◽  
Igor Danilov
Keyword(s):  
New Species ◽  
Eastern Europe ◽  
Late Miocene ◽  
Posterior Part ◽  
Detailed Comparison ◽  
Early Pleistocene ◽  
Phylogenetic Position ◽  
Published Data ◽  
Two New Species ◽  
New Material

Background. Sakya Bogachev, 1960 is a genus of geoemydid turtles with unusual scalation of the carapace consisting of 9–10 vertebrals and 8–10 pairs of pleurals. It is known from Neogene localities of Eastern Europe and includes two species: Sakya riabinini (Khosatzky, 1946) (= S. pontica Bogachev, 1960), from the late Miocene (MN13) to early Pleistocene of Eastern Europe (Moldova, Romania, Russia, and Ukraine) and Sakya kolakovskii Chkhikvadze, 1968 from the Pliocene of Abkhazia. Attribution of Melanochelys etuliensis Khosatzky and Redkozubov, 1986 from the early Pliocene of Moldova to Sakya is poorly corroborated. Here we report new material of Sakya from the late Miocene of Russia and Ukraine, which, probably, belongs to one or two new species of this genus and expands its stratigraphic distribution. Methods. We examined new material of Sakya, that includes posterior part of carapace and incomplete plastron from Morskaya 2 locality (MN 13, Rostov Province, Russia), incomplete carapace and plastron from Egorovka locality (MN 12, Odessa Province, Ukraine), and fragmentary shell remains from Fortepianka locality (MN 11, Republic of Adygea, Russia). For comparison we used published data and personal observations on other specimens of Sakya. Results. The specimens from Morskaya 2 and Egorovka are assigned to Sakya based on the presence of increased number of vertebrals and pleurals. Both specimens differ from the described species of Sakya by reduced number of vertebrals (seven in the Morskaya 2 specimen, and five in the Egorovka specimen), and extension of the posteriormost vertebral onto pygal. In addition, they differ from S. riabinini in the presence of eight neurals, longer than wide pleurals, and from S. kolakovskii in the presence of two suprapygals and serrated posterior edge of the carapace. The material from Fortepianka is too fragmentary for detailed comparison, but also differs from S. riabinini in the reduced number of vertebrals. Discussion. The reported material may represent one or two new species of Sakya. The reduced number of vertebrals in these forms probably represents a primitive condition, whereas the extension of the posteriormost vertebral onto the pygal may be a synapomorphy, which unites the new forms. Thus, the Morskaya 2 and Egorovka specimens of Sakya may represent a separate primitive lineage of this genus. In this case, S. kolakovskii and S. riabinini form a more advanced clade with increased number of carapacial scales. These issues as well as phylogenetic position of Sakya within Geoemydidae will be checked by future phylogenetic analysis. The Sakya material from Fortepianka (MN11, late Sarmatian) represents the earliest reliable record of this genus, known previously beginning from MN 12 (Meotic).

Morphotypes, polymorphism and peristome in the species of the genus Holcophylloceras Spath, 1927. Hypothesis of the dimorphism in the species Holcophylloceras zignodianum (d’Orbigny, 1848)

2007 ◽  
Vol 178 (3) ◽  
pp. 217-229 ◽  
Author(s):  
Bernard Joly ◽  
Bruno Fonters
Keyword(s):  
Sexual Dimorphism ◽  
Lower Cretaceous ◽  
The Other ◽  
Deep Waters ◽  
Other Hand ◽  
New Material ◽  
Small Growth ◽  
Initial Object

Abstract The genus Holcophylloceras Spath, 1927, including especially a majority of Jurassic species and some rare lower Cretaceous species, is easy to distinguish from other genera with constrictions such as Calliphylloceras Spath, 1927 or Sowerbyceras Parona & Bonarelli, 1895. In the genus Holcophylloceras the constrictions are clearly sigmoid or falcoid. Both characteristics can be observed on the same specimen. In the genus Calliphylloceras the constrictions are falcoid while they are sigmoid on Sowerbyceras. Actually these genera are closely allied and they represent evolutionary stages in a lineage characterized by more or less growth alteration. The lineage origin probably exists among Liassic Phylloceras. The genus Calliphylloceras shows a small growth alteration, while it is maximal in Sowerbyceras and it is intermediate in Holcophylloceras. This note shows that species of the genus Holcophylloceras are also characterized by three morphotypes: prae-caucasica, caucasica and nausikaae; these morphotypes do not characterize any particular species. The first and the second morphotypes could be an adaptation to live in deep waters. They probably give more solidity to the shell. The initial object of this note was to study again all the morphotypes of the genus Holcophylloceras with a new material collected in the oxfordian “Terres noires”. The authors of this note have studied the relations between the morphotypes prae-caucasica, caucasica and the peristome of Holcophylloceras. Does the peristome study permit to envisage the existence of dimorphic couples? (sexual dimorphism?). The result has been disappointing. On the other hand many microconchs and macroconchs have been identified. In particular with zignodianum-mediterraneum it is possible to identify the “male form” (zignodianum = microconch) and the “female form” (mediterraneum = macroconch) which confirms the intuition of Beznosov [1958] by an other approach to the problem. Many authors asked them if they had to separate the forms with sigmoid constrictions from those with falcoid constrictions. It seems now, there is no doubt and both species zignodianum-mediterraneum have to be joined in the same taxon zignodianum which has priority over mediterraneum. Last result of this study is the justification of the genus Holcophylloceras created by Spath.

Revision of New Caledonian species of Eumolpinae described by K. M. Heller (Coleoptera: Chrysomelidae)

Zootaxa ◽  
2011 ◽  
Vol 3060 (1) ◽  
pp. 31-46 ◽  
Author(s):  
JESÚS GÓMEZ-ZURITA
Keyword(s):  
New Species ◽  
Sexual Dimorphism ◽  
New Caledonia ◽  
Female Genitalia ◽  
Careful Study ◽  
Male And Female ◽  
New Information ◽  
Taxonomic Research ◽  
New Material ◽  
First Time

The Chrysomelidae of New Caledonia are rich and unique, but insufficiently characterized. New species are being rapidly described, sometimes without careful study of the earlier taxonomic research. Karl M. Heller (Dresden, Germany) described in 1916 seven species of Eumolpinae which are redescribed here to distinguish them from other known species and to provide new information about sexual dimorphism and genitalic structures. New material is used to redefine their distribution. The males of Dematochroma lepros (Heller, 1916) and D. culminicola (Heller, 1916), and the female of D. difficilis (Heller, 1916) are described for the first time. Male and female genitalia are first described for seven and five species, respectively. D. difficilis (Heller, 1916) stat. rev., is revalidated from previous synonymy with D. terastiomerus (Heller, 1916). Lectotypes are designated for D. humboldtiana and D. terastiomerus.

Lower Devonian aulacopleuroidean trilobites from Oklahoma

1997 ◽  
Vol 71 (4) ◽  
pp. 703-712 ◽  
Author(s):  
Jonathan M. Adrain ◽  
Gerald J. Kloc
Keyword(s):  
New Species ◽  
Sexual Dimorphism ◽  
North American ◽  
Lower Devonian ◽  
First Record ◽  
The North ◽  
New Information ◽  
New Material

New aulacopleuroidean trilobites from the Lochkovian of Oklahoma include the otarionine Cyphaspis carrolli new species from the Haragan Formation, and the brachymetopid Cordania wessmani new species from the overlying Bois d'Arc Formation. Cyphaspis carrolli is the first record of the genus from the North American Devonian. It is a highly plesiomorphic species, dissimilar to contemporaries from Europe, but closely related to Silurian species from Northern Laurentia and England. Cordania wessmani had previously been interpreted as a possible sexual dimorph of Cordania falcata Whittington, 1960, but new material and information shows that the forms occur separately with no stratigraphic overlap. New information on trilobite occurrence in the Haragan and Bois d'Arc Formations does not support previous hypotheses of trilobite sexual dimorphism, but rather indicates the presence of distinct, stratigraphically successive faunas.

Sexual dimorphism inLaccopithecus robustus, a late Miocene Hominoid from China

1989 ◽  
Vol 79 (2) ◽  
pp. 137-158 ◽  
Author(s):  
Pan Yuerong ◽  
Diane M. Waddle ◽  
John G. Fleagle
Keyword(s):  
Sexual Dimorphism ◽  
Late Miocene
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