[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 Ã 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 correspondantes, 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 Â« Diffusion des Connaissances Â») 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 Â« Tools Â» concerning methods of measurements).

Instructions for use.

Numbers (1, 2, 3, etc.) inside the tables refer to measurements described in Â« Tools - System of measurements for Equus (or Hipparion) bones and teeth Â» 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 Â« Tools Â» contains also practical explanations of techniques such as Simpson’s ratio diagrams, or Â« recipes Â» for calculating the withers height or for differenciating anterior and posterior phalanges.

Most recent articles

Mursi Formation

Tuesday 28 April 2015

As much as I know, the Mursi Formation is believed to be older than 4 Ma. The fragment of MC III (YS 1968-3585) may have belonged to the same species as KP 62 128/65 from Kanapoi (Fig.M1). The lower P2 has no ectostylid (Fig.M2).

continue

Usno Formation

Tuesday 28 April 2015

The sediments of the Usno Formation date from ca. 3 to ca. 4 Ma. The upper cheek teeth are very plicated (Fig.U1); the lower molar has isolated protostylid and ectostylid, both small (Fig.U2).

continue

Shungura Formation, Member A

Tuesday 28 April 2015

The Member A of the Shungura Formation is correlated with the lower part of Usno Formation. I know of only one cheek tooth, an upper P2, 81-1969-109. The enamel is plicated and the pli caballin is long (Fig.A1).

continue

Shungura Formation, Member B

Tuesday 28 April 2015

The Member B of the Shungura Formation is correlated with the upper part of Usno Formation. Its age is comprised between 3.5 and 3 Ma. The material collected by the French and American expeditions is much richer than that of the older sediments. There are several limb bones, and more than a (…)

continue

Shungura Formation, Member C and B-C

Tuesday 28 April 2015

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 (…)

continue

Shungura Formation, Member D

Tuesday 28 April 2015

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 B.

continue

Shungura Formation, Member E and E-F

Tuesday 28 April 2015

Again, the size differences suggest the coexistence of two species â€“ one small, with simpler enamel (lower P2, Ph1), the other larger with grooved and flat incisors.

continue