Remarkable micro-endemism and high congeneric richness: eight new cave-restricted species of Pseudochthonius Balzan, 1892 (Pseudoscorpiones, Chthoniidae) from the Brazilian semi-arid

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  Remarkable micro-endemism and high congeneric richness: eight new cave-restricted species of Pseudochthonius Balzan, 1892 (Pseudoscorpiones, Chthoniidae) from the Brazilian semi-arid Abstract Eight new species of pseudoscorpions belonging to the genus Pseudochthonius Balzan, 1892 are described from the semi-arid region of Brazil. Comprehensive morphological descriptions, diagnostic characters, detailed illustrations, and ecological remarks of the habitats are provided for Pseudochthonius celestialis sp. nov., P. caritas sp. nov., P. patientia sp. nov., P. temperantia sp. nov., P. diligentia sp. nov., P. castitas sp. nov., P. humilitas sp. nov., and P. benignitas sp. nov. In addition, we present a brief discussion of the potential factors underlying the remarkable congeneric species richness observed in this geographically restricted region, as well as the principal threats faced by these species. These findings underscore the importance of conserving caves in order to pr...

New records of Segestria florentina from Germany with observations on somatic and genitalic differences in juveniles and adults compared to S. bavarica (Araneae: Segestriidae)

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New records of Segestria florentina from Germany with observations on somatic and genitalic differences in juveniles and adults compared to S. bavarica (Araneae: Segestriidae)

Abstract

New records of the large tube web spider Segestria florentina (Rossi, 1790) from Essen in North Rhine-Westphalia in Germany are presented. Genital characteristics of specimens from Germany are compared with those of the native Segestria bavarica C. L. Koch, 1843. For differentiation of juveniles of the two species, characteristics of the leg spination and opisthosomal colouration are described.

Lauterbach, S., & Imbusch, G. (2026). New records of Segestria florentina from Germany with observations on somatic and genitalic differences in juveniles and adults compared to S. bavarica (Araneae: Segestriidae). Arachnologische Mitteilungen / Arachnology Letters, 71, 14–22. https://doi.org/10.30963/aramit7104