Historical clue formulations

• Bug's sensory appendage — 2020-10-29
• Insect's feeler — 2013-06-09
• Sensory appendage — 2010-02-23
• Insect organ — 2005-11-04
• Feeler — 1998-04-26
• Insect's sense organ — 1996-10-10
• Feeler — 1996-01-04