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...

First Report of Centruroides limpidus in Tlaxcala, Mexico

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First Report of Centruroides limpidus in Tlaxcala, Mexico

Abstract

This study reports, for the first time, scorpions belonging to the genus Centruroides Marx 1890 in Tlaxcala, Mexico. Three specimens of C. limpidus (Karsch 1879) were collected in urban areas of the state. The scorpion fauna of Tlaxcala remains understudied, possibly due to the low prevalence of scorpionism. The presence of C. limpidus indicates a potential public health concern in the state.

Este estudio se reporta por primera vez escorpiones pertenecientes al género Centruroides Marx 1890 en Tlaxcala, México. Se colectaron tres especímenes de C. limpidus (Karsch 1879) en zonas urbanas del estado. La fauna de escorpiones de Tlaxcala permanece poco estudiada, posiblemente debido a la baja prevalencia del escorpionismo. La presencia de C. limpidus indica un potencial problema de salud pública en el estado.

Verónica Hernández-Hernández, Yuriria Meza-Castillo, Vianey Vidal-Acosta, Eduardo Dávalos-Becerril, Fabián Correa-Morales, Cassandra González-Acosta, Miguel Moreno-García "First Report of Centruroides limpidus in Tlaxcala, Mexico," Southwestern Entomologist, 49(1), 547-550, (11 April 2024)