Slovenia 2020 "Mammal Fossils In Slovenia: Prohyracodon telleri"

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Issue Date 13.03.2020
ID Michel: Scott: Stanley Gibbons: Yvert: Category: pF
Design Zlatko Drčar
Stamps in set 1
Value €0.95 - Prohyracodon telleri
Emmision/Type commemorative
Place of issue Kamnik
Size (width x height) 42.60 mm x 29.82 mm
Layout Sheet of 25 stamps
Products FDC x1
Paper Tullis Russell Chancellor Litho PVA RMS GUM, 102 g/m2
Perforation 14 x 14
Print Technique Offset, 4 colours
Printed by Agencija za komercijalnu djelatnost d.o.o., Zagreb, Croatia
Quantity 40.000
Issuing Authority Posta Slovenije
Fossil Prohyracodon telleri on stamp of Slovenia 2020

On March 13th, 2020 Slovenian Post Authority issued the fifth stamp of their multi-year set of "Mammals fossils in Slovenia" shows fossil and reconstruction, on the FDC, of Prohyracodon telleri.
The first stamp of the set issued in 2016 and shown fossil of cave bear.

Prohyracodon telleri is the oldest prehistoric mammal fossil from Motnik village in the Municipality of Kamnik and also known as a Dwarf Rhinoceros.

The following paragraph was written by Matija Kriznar MSc, palaeontologist, senior curator Slovenian MNatural History Museum and was published in a bulletin Nr. 130 of Slovenian Post in 2020.
mandible of Prohyracodon telleri from collection of Kamnik Natural History Museum
The image credit: Kamnik Museum

Motnik and its surrounding area were once the site of coal exploration and mining. Miners in years past unearthed a variety of fossil remains in the underground tunnels of the area's coal mines. In the second half of the nineteenth century these included the osseous remains of vertebrates, which had evidently been quite common.
In 1910 the Viennese palaeontologist Othenio Abel classified the remains of a fossil mammal as belonging to the new genus and species Meninatherium telleri. Later forgotten, Meninatherium was rescued from oblivion by the palaeontologist Kurt Heissing, who on examining remains in Austrian palaeontological collections was of the opinion that they belonged to the Prohyracodon genus. As a result, the Motnik fossils gained the new scientific name Prohyracodon telleri, or "Teller's prohyracodon".
Teller's prohyracodon was a medium large mammal the size of a mouflon. It lived in the marshy flatlands where coal formed in freshwater basins. The marshes were also inhabited by crocodiles and other mammals such as Anthracohyus slovenicus. These remains show that the coal-bearing strata in the Motnik area probably formed approximately 40 million years ago, in the geological period of the late Eocene. This means that Teller's prohyracodon, like the other Motnik remains, is among the oldest fossil mammals found in Slovenia.



Due to the fact that Prohyracodons are known from few fragmentary fossils only, it was impossible to make precise reconstruction of the animal. Perhaps this is the reason for stamp designer to use reconstruction of similar animal: Hyracodon nebraskensis, from German book "Phylogenie der Mammalia, Stammesgeschichte der Saeugetiere von Eric Thenius" published in Berlin 1969, fir the stamp and and First-Day-of-Issue Postmark.

The images of Hyracodon from book Eric Thenius
The drawings of the skull and skeleton of Hyracodon nebraskensis, by Eric Thenius. (Compare it with the stamp and the postmark) The skeletoon of Hyracodon in the Natural History Museum of Los Angeles, USA Reconstruction of the Eocene hyracodont rhino Hyracodon, by Carl Buell in the Amerucan Natural History Museum in New Yourk, USA
Images credit: book "Phylogenie der Mammalia, Stammesgeschichte der Saeugetiere von Eric Thenius" Image credit: Wikipedia Image credit: AMNH website

Entire skeleton of Hyracodon nebraskensis can be seen in Natural History Museum of Los Angeles for example.
Hyracodon was a lightly built, pony-like mammal of about 1.5 meters long. It's skull was large in comparison to the rest of the body. Hyracodon's dentition resembled that of later rhinoceroses, but it was a much smaller animal and differed very little in appearance from the primitive horses of which it was a contemporary (32–26 million years ago).
Hyracodons were perhaps the most unusual of the rhinos in that they had long slender limbs and feet. In this sense they were more horse-like in body proportions than other rhinos although, unlike horses, hyracodonts retained three toes on all four feet.



Products and associated philatelic items

FDC First-Day-of-Issue Postmark Stamp Sheet
Anthracotherium on FDC of Slovenia 2019 Fossil of Anthracotherium on postmark of Slovenia 2019 Anthracotherium on stamps of Slovenia 2019
Example of circulated cover
Anthracotherium on circulate FDC of Slovenia 2019



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References



Acknowledge

  • Many thanks to Mr. Rudolf Hofer, editor of Paleontology column in Glueckauf magazine of Arbeitsgemeinschaft Bergbau und Geowissenschaften e. V., who drawn my attention on diffeence between animal name and it reconstrruction on the stamp
  • Many thanks to Mr. Matija Kriinar, paleontologist and senior curator Slovenian Natural History Museum, for clarifications and nice conversation on facebook.


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Latest update 25.03.2025

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