Note: Key from Horwitz et al. 1995 |
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1. Abdomen (A) folded tightly under cephalothorax, without tail fan; rostrum (R) markedly reduced or absent
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-Abdomen (A) not folded tightly beneath thorax (T), bearing a tail fan (TF); rostrum (R) conspicuous Note: Rostrum may be reduced in relative size in the subterranean forms.More ››› 2 
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