Scorpions‘ ancestors first appeared around 450 million years ago. That’s as old as sharks, older than dinosaurs, and even ...

Introduction -- Dichotomous keys -- External anatomy -- Insect development -- Taxonomic terminology -- Taxonomy, classification, and nomenclature -- Phylum Arthropoda ...

THIS “Guide” admirably fulfils its functions; it is written in a clear style, and indicates tersely the main points of interest associated with the chief families and genera. The principal characters ...

THE Arachnida have been unduly neglected by zoologists, having been overshadowed as objects of study by the beauty and infinite variety of the insects. The study of the class has been difficult, owing ...

Due to their relative rareness and restricted distribution, little is known about the ultra-structure of ricinuleids. In particular, sense organs have not been the subject of electron microscopic ...

Two female specimens of an undescribed species of stylocellid harvestman (Opiliones, Stylocellidae) from Sulawesi were extracted in methanol, and compounds in the product were identified by means of ...