Chelicerata probably appeared during the Cambrian period. Their precise origins remain
unclear, but may lie among the so-called great appendage arthropods. By the late Cambrian …

Fossils from the mid-Cretaceous (c. 99 Ma) Myanmar (Burma) amber include all extant
orders of Arachnida, including the earliest representatives of Schizomida, Parasitiformes …

Fossil spiders have not been fully cataloged since Bonnet's Bibliographia Araneorum and
are not included in the current Catalog. Since Bonnet's time there has been considerable …

Baltic and Bitterfeld ambers are important deposits of polymerized conifer resin that are
widely recognized for their exquisite fossil inclusions, especially insects. Because of over …

Six species of harvestman (Arachnida: Opiliones) are documented from the Eocene Rovno
amber in Ukraine. From the suborder Eupnoi we record Caddo dentipalpus (CL Koch & …

Fleas (order Siphonaptera) are highly-specialized, diverse blood-feeding ectoparasites of
mammals and birds with an enigmatic evolutionary history and obscure origin. We here …

Aim To test the hypothesis that continental drift drives diversification of organisms through
vicariance, we selected a group of primitive arachnids which originated before the break‐up …

We investigate the phylogeny, biogeography, time of origin and diversification, ancestral
area reconstruction and large-scale distributional patterns of an ancient group of arachnids …

A harvestman (Arachnida: Opiliones) is described from the Early Devonian (Pragian) Rhynie
cherts, Aberdeenshire, Scotland. Eophalangium sheari gen. et sp. nov. is the oldest known …

Aim To develop a comprehensive explanation for the biological diversity of Southeast Asia,
especially in the Wallacea and Sundaland regions. This study focuses on a group of …