Osmia - Journal of Hymenopterology - Revue d'Hyménopterologie - Biodiversity, Entomology, Hymenoptera, Hyménoptères
Published April 29, 2021 | Version v1
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Surviving the winter: Tetramorium sibiricum n. sp., a new Central Siberian ant species (Hymenoptera: Formicidae)

Creators

  • 1. Senckenberg Museum , Görlitz, Germany

Description

A new species of the thermophilous Tetramorium caespitum species complex, T. sibiricum n. sp., is described from the Central Siberian region near Ulan Ude that has mean January temperatures of – 24 °C. The new species is clearly separable from the related species, T. indocile Santschi, 1927 and T. caespitum (Linnaeus, 1758), by exploratory data analyses of 35 phenotypic characters and by a discriminant analysis of seven phenotypic characters. A key to these three species, which all might occur in Central Siberia, is provided. The zoogeographic divide called the Reinig Line (De Lattin, 1967) is considered to be important in separating the ranges of Central and East Palaearctic ant species with less strong cold-hardiness. Based on images of type specimens, Tetramorium annectens Pisarski, 1969 is recognized as heterospecific from T. tsushimae Emery, 1925.

 

Survivre en hiver : Tetramorium sibiricum n. sp., une nouvelle espèce de fourmi centro-sibérienne (Hymenoptera : Formicidae)

Une nouvelle espèce de fourmi appartenant au complexe d’espèces thermophiles Tetramorium caespitum, T. sibiricum n. sp., est décrite de Sibérie centrale, dans la région proche de Ulan Ude qui présente des températures moyennes en janvier de – 24 °C.  Cette espèce est clairement différentiable des espèces apparentées, T. indocile Santschi, 1927 et T. caespitum (Linnaeus, 1758), par l’analyse exploratoire de données de 35 caractères phénotypiques et par l’analyse discriminante de sept caractères phénotypiques. Une clef dichotomique pour identifier ces trois espèces, qui peuvent être toutes trois présentes en Sibérie Centrale, est proposée. Une division zoogéographique appelée la Ligne de Reinig (De Lattin, 1967) est considérée comme importante pour séparer les aires de répartition des espèces de fourmis moins résistantes au froid des zones Centrale et Est Paléarctique.  À travers l’analyse d’images de spécimens types, Tetramorium annectens Pisarski, 1969 est reconnue comme étant hétérospécifique à T. tsushimae Emery, 1925.

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References

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