Synxiphosura

Synxiphosura

[¦sin‚zif·ə′su̇r·ə]
(paleontology)
An extinct heteorgeneous order of arthropods in the subclass Merostomata possibly representing an explosive proliferation of aberrant, terminal, and apparently blind forms.
McGraw-Hill Dictionary of Scientific & Technical Terms, 6E, Copyright © 2003 by The McGraw-Hill Companies, Inc.