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Sense organs of a thysanuran, Ctenolepisma lineata pilifera , with special reference to those on the antennal flagellum (Thysanura, Lepismatidae)

1970; Wiley; Volume: 132; Issue: 1 Linguagem: Inglês

10.1002/jmor.1051320102

1097-4687

Eleanor H. Slifer, Sant S. Skkhon,

Plant and animal studies

Abstract Six types of sense organs are present on the antennal flagellum of Ctenolepisma lineata pilifera : tactile hairs, trichobothria, thick‐walled chemoreceptors, small thin‐walled chemoreceptors and coeloconic chemoreceptors. The number, size and distribution on the antenna of each type have been recorded. The base of the tactile hair is more complex than is that of other insects examined earlier. Trichobothria, long, slender hairs that oscillate in a gentle puff of air, are an unusal feature in insects and especially so for the antenna. The two types of thin‐walled chemoreceptors differ in shape, size and in the structure of their walls and internal parts. A pocket‐like depression of the floor of the cavity in which the peg of the coeloconic sense organ is set has not been found in earlier studies. Its function is unknown. The axons from the sensory neurons extend along the inner surface of the antennal epidermis as a sheet of fibers lining the antennal lumen. Near the pedicel the axons leave the epidermis and join to form the antennal nerve. A few observations on sense organs on appendages other than the antennae and some notes on behavior are included.