Functional analysis of sense organ specification in the Tribolium castaneum larva reveals divergent mechanisms in insects

Table 1 Categories of external sensilla of insects

Sense organ	Structure	Additional characteristics	Function
Chaetoid sensillum	- Bristle-like - Movably - Articulated in wide socket	- Uniporous (pore at tip) - Steep angle	Contact chemosensory organ [16]
Chaetoid sensillum	- Bristle-like - Movably - Articulated in wide socket	- Aporous - Flat angle	Mechanosensory organ [15]
Trichoid sensillum	- Hair-like - Articulated in tight socket	- Uniporous (pore at tip) - Steep angle	Contact chemosensory organ [16]
		- Mulitporous - Curved hair	Olfactory sense organ [16]
		- Aporous	Mechanosensory organ [16]
Basiconic sensillum	- Pegs - Cones	- Blunt tip - Sharp or curved - Flat angle when mechanosensory	Mechano- and chemosensory organ [15, 16]
Campaniform sensillum	- Dome with collar	- Variations in collar size - Dome shape	Proprioception
Coeloconic sensillum	- Pit with cone inside		Hygro/thermo-sensory

ISSN: 1741-7007