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Olvia, unknown level, phalanges

vendredi 28 février 2014

Natural Trap, Wyoming, Introduction

samedi 19 octobre 2013

It was John Howe who studied the equids of Natural Trap but his manuscript was never published. Instead, part of his work was included in "Eisenmann V., Howe J., Pichardo M. 2008 (published in 2011) : Old World Hemiones and New World slender species (Mammalia, Equidae). Palaeovertebrata (…)

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Natural Trap, Tibiae, Data

vendredi 18 octobre 2013

In Table 1 are the original data (2 sheets) provided by John Howe. Some measurements seemed aberrant ; the are printed in red and highlighted in yellow ; the same specimen was measured twice and only the mean (X) was used. In Table 2 the corrected data I used are printed and highlighted in blue (…)

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Natural Trap, Crania and Mandibles, Data

vendredi 18 octobre 2013

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Natural Trap, Ph3, Data

vendredi 18 octobre 2013

John Howe sent me copies of his data on seven sheets. Some data were redundant. In Table 1 you may find the original data and in Table 2 - the ones I have used. A few phalanges were obviously different from the rest by their size. They will be discussed later, after the bulk of the material (…)

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Natural Trap, Ph2, Data

vendredi 18 octobre 2013

Like for the first phalanges, I received from John Howe copies of his data on second phalanges (Ph2) on separated (10) sheets. A few data were redundant, in that cases I used their mean noted ’-X’. In Table 1, you may find the original data, in Table 2 - the ones I used, and in Table 3 - the (…)

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Natural Trap, Ph1, Data

vendredi 18 octobre 2013

Like the rest of the material of Natural Trap, the first phalanges (Ph1) were measured by John Howe and his student(s). John Howe sent me copies of these data on nine sheets. Some data appeared redundant, either because they originated from the right and left side of the same animal or because (…)

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Natural Trap, MT, Data

vendredi 18 octobre 2013

Like the MC of Natural Trap, the third metatarsals (MT) were measured by John Howe (sheets I and II) and one student (sheets III and IV). The diagrams (Fig.1,2) show again that they did not measure the diaphysis depth (4) in the same way. There is no way to increase the measure 4 but there is a (…)

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Natural Trap, MC, Data

vendredi 18 octobre 2013

Like the rest of the material of Natural Trap, the third metacarpals (MC) were measured by John Howe (sheets I and II) and one student (sheets III and IV). Looking at the diagrams (Fig.1,2) it is obvious that they did not measure the diaphysis depth (4) in the same way. There is no way to (…)

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Natural Trap, Humeri, Data

vendredi 18 octobre 2013

In Table 1, are the original data provided by John Howe (2 sheets). Scatter diagrams (Fig.1 and 2) show that Natural Trap humeri are longer than in extant E. hemionus onager (Fig.1) as well as wider and flatter (Fig.2). As in other limb bones, a few specimens seem larger, possibly because (…)

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