caa a22 4500 469082577 CHVBK 20180323132954.0 cr unu---uuuuu 170328e19920301xx s 000 0 eng 10.1007/BF00319368 doi (NATIONALLICENCE)springer-10.1007/BF00319368 The metathoracic wing-hinge chordotonal organ of an atympanate moth, Actias luna (Lepidoptera, Saturniidae): a light- and electron-microscopic study [Elektronische Daten] [J. Yack, B. Roots] Summary: The structure of a simple chordotonal organ, the presumed homologue of the noctuoid moth tympanal organ, is described in the atympanate moth, Actias luna. The organ consists of a proximal scolopidial region and a distal strand, which attaches peripherally to the membranous cuticle ventral to the hindwing alula. The strand is composed of elongate, microtubule-rich cells encased in an extracellular connective tissue sheath. The scolopidial region houses three mononematic, monodynal scolopidia, each comprised of a sensory cell, scolopale cell, and attachment cell. The dendritic apex is octagonally shaped in transverse section, its inner membrane lined by a laminated structure reminiscent of the noctuoid tympanal organ ‘collar'. A 9+0-type cilium emerges from the dendritic apex, passes through both the scolopale lumen and cap, and terminates in an extracellular space distal to the latter. Proximal extensions of the attachment cell and distal prolongations of the scolopale cell surrounding the cap are joined by an elaborate desmosome, with which is associated an extensive electron-dense fibrillar plaque. Within the scolopale cell, this plaque constitutes the scolopale ‘rod' material. The data are discussed in terms of both the organ's potential function, and its significance as the evolutionary proto-type of the noctuoid moth ear. Springer-Verlag, 1992 Chordotonal organ nationallicence Scolopidium nationallicence Homology nationallicence Electron microscopy nationallicence Sensilla nationallicence Evolution nationallicence Actias luna (Insecta) nationallicence Yack J. Department of Zoology, Erindale College, University of Toronto, L5L 1C6, Mississauga, Ontario, Canada aut Roots B. Department of Zoology, University of Toronto, M5S 1A1, Toronto, Ontario, Canada aut Cell and Tissue Research Springer-Verlag 267/3(1992-03-01), 455-471 0302-766X 267:3<455 1992 267 441 https://doi.org/10.1007/BF00319368 text/html Onlinezugriff via DOI 1 research-article jats NATIONALLICENCE 856 40 https://doi.org/10.1007/BF00319368 text/html Onlinezugriff via DOI NATIONALLICENCE 700 1- Yack J. Department of Zoology, Erindale College, University of Toronto, L5L 1C6, Mississauga, Ontario, Canada aut NATIONALLICENCE 700 1- Roots B. Department of Zoology, University of Toronto, M5S 1A1, Toronto, Ontario, Canada aut NATIONALLICENCE 773 0- Cell and Tissue Research Springer-Verlag 267/3(1992-03-01), 455-471 0302-766X 267:3<455 1992 267 441 Metadata rights reserved Springer special CC-BY-NC licence nationallicence BK010053 XK010053 XK010000 NATIONALLICENCE NATIONALLICENCE NL-springer