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The Scorpion Sternum: Structure And Phylogeny (Scorpiones: Orthosterni), Michael E. Soleglad, Victor Fet
The Scorpion Sternum: Structure And Phylogeny (Scorpiones: Orthosterni), Michael E. Soleglad, Victor Fet
Victor Fet
The structure of the sternum of all major Recent scorpion groups is analyzed in detail. Based on this analysis, two fundamental sternum types are identified, described and illustrated, type 1 and type 2. These sternum types are distinguished by criteria based on external and internal structural features. The sternum types described herein are offered as a replacement for the various characterizations used throughout the last 140 years which emphasize only gross overall shape and proportions. Phylogenetic and taxonomic ramifications of these new sternal types are discussed. The Carboniferous fossil scorpion Palaeopisthacanthus schucherti Petrunkevitch is assigned to sternum type 1. The …
Serrula In Retrospect: A Historical Look At Scorpion Literature (Scorpiones: Orthosterni), Matthew R. Graham, Victor Fet
Serrula In Retrospect: A Historical Look At Scorpion Literature (Scorpiones: Orthosterni), Matthew R. Graham, Victor Fet
Victor Fet
Serrula, a small comb-like structure on the ventral aspect of cheliceral movable finger in scorpions, has often been overlooked or ignored. Scorpion genera that are currently known to possess serrula belong to six families: Chactidae, Euscorpiidae, Iuridae, Pseudochactidae, Superstitioniidae, and Vaejovidae. All relevant literature on scorpion serrula is reviewed, and serrula of representative scorpion taxa is illustrated by SEM images. We suggest that the inconsistency in reporting serrula is based on several factors (or combination thereof): (a) serrula tines can quite often be broken off partially or completely, especially in adults; (b) serrula can be vestigial and hardly visible under …