An accessory olfactory pathway in Lepidoptera: the labial pit organ and its central projections in Manduca sexta and certain other sphinx moths and silk moths

K. S. Kent, I. D. Harrow, P. Quartararo, J. G. Hildebrand

Research output: Contribution to journalArticle

105 Scopus citations

Abstract

In the hawkmoth, Manduca sexta, the third segment of each labial palp contains a pit, which houses a densely packed array of sensilla. We have named this structure the labial pit organ (LPO). The sensilla within the pit are typical of olfactory receptors, characterized by a grooved surface, wall pores, and pore tubules. Axons arising from receptor cells that innervate these sensilla project bilaterally to a single glomerulus in each antennal lobe. We have compared this central projection with that in three other species of Manduca (M. quinquemaculata, M. dilucida, and M. lanuginosa) and in the silkmoths Antheraea polyphemus and Bombyx mori. A bilateral projection to a single glomerulus in each antennal lobe is present in all cases. We suggest that the LPO serves as an accessory olfactory organ in adult Lepidoptera.

Original languageEnglish (US)
Pages (from-to)237-245
Number of pages9
JournalCell and Tissue Research
Volume245
Issue number2
DOIs
StatePublished - Aug 1 1986
Externally publishedYes

Keywords

  • Antennal lobes
  • Labial palps
  • Labial pit organ
  • Manduca sexta (Insecta)
  • Olfactory system

ASJC Scopus subject areas

  • Pathology and Forensic Medicine
  • Histology
  • Cell Biology

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