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| dct:abstract
| - 1. This study, mainly of a biometric nature, shows that the Western Pyrenees (departments of Pyrenees-Atlantiques and, partly, of Hautes-Pyrenees) on the one hand, and the region ranging from the Perigord Blanc (Dordogne) to the causse of Larzac (Aveyron) on the other hand, host a particular subspecies, Arcyptera fusca (Pallas, 1773) ssp. occidentalis nov. : for both sexes the postfemurs tend to be narrower and the indexes of holoptery tend to be lower than in the Eastern Pyrenees and the French Alps; and the females are rather more corpulent and rather less micropterous. 2. The subspecies of Eastern Pyrenees and French Alps is certainly distinct from that of Altai (Western Siberia): the two Altai males studied are significantly larger than exemplaries of France (several parameters), and the ratio of eye length to length of the sub -eye furrow is rather lower; but it was not possible to know with certainty whether or not any of the latter two subspecies corresponded to the nominative subspecies. 3. The rates of the impulses constituting the syllables of calling songs are significantly higher in Altai and in Caucasus than in those concerning the two French races; this suggests that it is the same taxon in these two Russian regions, and it could only be the nominative subspecies. But this needs to be confirmed.
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| bibo:abstract
| - 1. This study, mainly of a biometric nature, shows that the Western Pyrenees (departments of Pyrenees-Atlantiques and, partly, of Hautes-Pyrenees) on the one hand, and the region ranging from the Perigord Blanc (Dordogne) to the causse of Larzac (Aveyron) on the other hand, host a particular subspecies, Arcyptera fusca (Pallas, 1773) ssp. occidentalis nov. : for both sexes the postfemurs tend to be narrower and the indexes of holoptery tend to be lower than in the Eastern Pyrenees and the French Alps; and the females are rather more corpulent and rather less micropterous. 2. The subspecies of Eastern Pyrenees and French Alps is certainly distinct from that of Altai (Western Siberia): the two Altai males studied are significantly larger than exemplaries of France (several parameters), and the ratio of eye length to length of the sub -eye furrow is rather lower; but it was not possible to know with certainty whether or not any of the latter two subspecies corresponded to the nominative subspecies. 3. The rates of the impulses constituting the syllables of calling songs are significantly higher in Altai and in Caucasus than in those concerning the two French races; this suggests that it is the same taxon in these two Russian regions, and it could only be the nominative subspecies. But this needs to be confirmed.
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| dct:bibliographicCitation
| - Defaut, B. 2020. Révision taxinomique préliminaire d'<em>Arcyptera fusca</em> (Pallas, 1773) en France (Orthoptera, Acrididae, Gomphocerinae). <em>Matériaux Orthoptériques et Entomocenotiques</em>, 25: 41-54.
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