Systematic revision of the Savignia genus group (Araneae: Linyphiidae: Erigoninae) with notes on their cephalic lobe evolution

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  Systematic revision of the Savignia genus group (Araneae: Linyphiidae: Erigoninae) with notes on their cephalic lobe evolution Abstract The Savignia genus group includes nine morphologically complex yet similar genera where species were assigned based mainly on the cephalic lobes. Among these genera, males of Diplocephalus Bertkau, 1883, Savignia Blackwall, 1833 and Araeoncus Simon, 1884 show some of the most extraordinary cephalic lobes among dwarf spiders (Linyphiidae, Erigoninae). In this study we undertake the first phylogenetic analysis of the Savignia genus group. We use 269 morphological characters (175 newly defined) and 70 taxa (59 ingroup taxa) to reconstruct the relationships and evolutionary trends of cephalic lobes in this lineage. Our findings show that cephalic lobes with varying shapes and sizes appear in several Savignia genus group lineages, highlighting that it is not a good diagnostic character. The high support in several clades allows the redefinition of t...

The Uncertainties of the Scorpionic Fauna of Madagascar (LES INCERTITUDES DE LA FAUNE SCORPIONIQUE DE MADAGASCAR)

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The Uncertainties of the Scorpionic Fauna of Madagascar (LES INCERTITUDES DE LA FAUNE SCORPIONIQUE DE MADAGASCAR)

Abstract

For about thirty years, the systematic of scorpions on the island of Madagascar has undergone
modifications at the discretion of the authors. We will attempt to approach this through the relevant
literature.

Reminder: Gérard Dupré has authorized Jan Ove Rein, M.Sc. in Zoology and curator of The Scorpion Files, to preserve and maintain an official archive of the journal Arachnides. The archive can be accessed at: https://www.ntnu.no/ub/scorpion-files/arachnides.php.