Fig. 1 in Some Unusual Small-Subunit Ribosomal RNA Sequences of Metazoans

Fig. 1. Schematic representation of the 18S rRNA locus. The gray squares represent the variable regions V2, V4, V7, and V9 with insertions (V2: Onychophora, Geophilomorpha, Cephalopoda, Archaeogastropoda; V4: Hexapoda, Crustacea, Pauropoda, Holothuroidea, Chaetognatha, Platyhelminthes, Cephalopoda; V7: Onychophora, Hexapoda, Crustacea, Pauropoda, Chilopoda, Platyhelminthes, Hirudinea, Cephalopoda, Gastropoda; V9: Onychophora, Crustacea, Cephalopoda). The black arrowheads represent particular insertions (10: Pauropoda; 11: Onychophora; E23–7: Onychophora and Pauropoda; E23–8: Pauropoda; 29: Pauropoda; 46: Protura). The black bar represents the 500 bp deletion of the Symphyla.