Véra Eisenmann

Véra Eisenmann

Les amateurs de Chevaux, curieux de leur évolution, trouveront ici quelques articles publiés à leur intention dans la rubrique « Diffusion des connaissances ».

Toutefois la majeure partie du site, toujours en construction, est destinée à des spécialistes et fournit des informations (sytème de mesures, mesures, illustrations, photographies, commentaires, bibliographie) concernant l’ostéologie des Equidés. Pour le moment, c’est surtout les Equidés actuels et quelques Equus fossiles (Equus, Allohippus, Plesippus) qui sont documentés.
En ce qui concerne les Hipparions au sens large, mes données sur les formes d’Amérique du Nord (Merychippus, Cormohipparion, etc.) sont disponibles (en anglais) ainsi que celles sur certains Hipparions de l’ex-Union Soviétique, de France et de Grèce.

Mode d’emploi.

Les numéros (1, 2, 3, etc.) dans les tableaux font référence à des mesures décrites dans les rubriques « Outils – Système de mesures pour les os et les dents d’Equus (et d’Hipparions) ». Chaque os est figuré avec les légendes corespondantes, mais il faut cliquer sur les vignettes pour que le dessin apparaisse en taille normale.
La rubrique « Outils » contient aussi des explications pratiques concernant des méthodes d’étude (diagrammes de Simpson, estimations de hauteurs au garrot, différenciation des premières phalanges antérieures et postérieures, etc.).

WELCOME.

Most of this site is, and will be, devoted to equids from Merychippus to extant Equus. The information (metric data, photographs, bibliographic references) is given in order to help research specialists or students with their work. Some publications (in « Diffusion des Connaissances ») are intended for a broader public.
The main linguage of this site is French but many articles were translated in English (in particular those in « Tools » concerning methods of measurements).

Instructions for use.

Numbers (1, 2, 3, etc.) inside the tables refer to measurements described in « Tools - System of measurements for Equus (or Hipparion) bones and teeth » where corresponding illustrations and captions may be found for each bone (you have to click on the reductions to make them appear full-size).

The rubric « Tools » contains also practical explanations of techniques such as Simpson’s ratio diagrams, or « recipes » for calculating the withers height or for differenciating anterior and posterior phalanges.


Most recent articles


Most recent articles


Shungura Formation, Member C and B-C

Tuesday 28 April 2015 by Véra Eisenmann
There are but a few available photographs although Hooijer described more fossils. A mandibular symphysis (Fig.C1) shows no reduction of the I3. On the lower B-C 3 70-701 (Fig.C2) both protostylid and ectostylid appear on the occlusal view although the tooth is little worn. It seems to belong (...)


Shungura Formation, Member D

Tuesday 28 April 2015 by Véra Eisenmann
A lower I1 (Fig.D1) seems to differ from those from the symphysis of Shungura C: more flattened and more grooved. The distal half of a MT III (Fig.D2) is smaller than that from Shungura B. The Ph1 from Tuff D (Fig.D3) certainly belongs to another species than that from Shungura (...)


Shungura Formation, Member E and E-F

Tuesday 28 April 2015 by Véra Eisenmann
Again, the size differences suggest the coexistence of two species – one small, with simpler enamel (lower P2, Ph1), the other larger with grooved and flat incisors.


Shungura Formation, Member F

Tuesday 28 April 2015 by Véra Eisenmann
Size differences persist (Fig.F1, Fig.F2). Ectostylids are developed and sometimes multiple (Fig.F3, F6).


Shungura Formation, Member G

Tuesday 28 April 2015 by Véra Eisenmann
Size differences persist as well as differences in plication patterns on upper cheek teeth (Fig.G1).


Shungura Formation, Member L

Tuesday 28 April 2015 by Véra Eisenmann
The material is very poor (Fig.L1 and L2).


Shungura Formation, VEO

Tuesday 28 April 2015 by Véra Eisenmann


Tentative interpretation of Hipparion incisors morphologies

Tuesday 28 April 2015 by Véra Eisenmann
Distinction between upper and lower incisors In upper incisors the occlusal mark (enamel ring corresponding to the infundibulum) is farther away from the lingual border and closer to the vestibular than in the lowers; the crown is more curved (Fig.1). Distinction between ‘evolved’ grazer forms (...)


Melka Kunturé, Ethiopie

Tuesday 28 April 2015 by Véra Eisenmann


Principaux morphes de crânes caballins, diagrammes et tableau

Thursday 19 June 2014 by Véra Eisenmann

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