caa a22 4500 469060964 CHVBK 20180323132857.0 cr unu---uuuuu 170328e19920501xx s 000 0 eng 10.1007/BF01219107 doi (NATIONALLICENCE)springer-10.1007/BF01219107 Morphology and structural organization of spiracles in female Argas (Persicargas) walkerae (Acari: Argasidae) [Elektronische Daten] [Rainer Gothe, Heidrun Schöl] Scanning electron microscopical investigations of fractures and corrosion casts of the spiracles from femaleA. walkerae ticks revealed a four-part structure, consisting of spiracular plate, ostium and macula forming the external closure, followed by the subostial space and the vestibulum of regulable volume, as well as the atrial chamber as the innermost part from which the main tracheal trunks originate. On the average, the spiracular plate was 158 μm long and 188 μm at the broadest width. It consisted of a thin, highly perforated external and a thick internal layer, which enclosed the interpedicellar space with numerous stout pedicels. In its posterior region, the spiracular plate was covered by the macula, which was up to 80 μm in length and 110 μm in width. The interpedicellar cavity opened into the subostial space measuring 95.5 μm in length and 159.6μm in width, which proceeded into the 112-μm long vestibulum. The roof of the vestibulum was flexible and could be everted and inverted. Inverted, the roof formed a quadratic bulge with numerous deep cuticular folds, which confined the lumen of the vestibulum either partially or completely. In corrosion casts, the roof was everted to a length of up to 89.3 μm. In the posterior part of the vestibulum, as well as in the initial fourth of the artrial chamber, numerous anvil-, cone-or drop-like cuticular projections were arranged in wedge-like fashion. The atrial chamber was almost spherical with a diameter of 138.4 μm. Five main tracheal trunks of different luminal diameter as well as numerous channels opened into the atrial chamber. Elsevier Science Publishers B.V., 1992 Gothe Rainer Institute for Comparative Tropical Medicine and Parasitology, Leopoldstr. 5, 8000, Munich, Germany aut Schöl Heidrun Institute for Comparative Tropical Medicine and Parasitology, Leopoldstr. 5, 8000, Munich, Germany aut Experimental & Applied Acarology Kluwer Academic Publishers 14/2(1992-05-01), 151-163 0168-8162 14:2<151 1992 14 10493 https://doi.org/10.1007/BF01219107 text/html Onlinezugriff via DOI 1 research-article jats NATIONALLICENCE 856 40 https://doi.org/10.1007/BF01219107 text/html Onlinezugriff via DOI NATIONALLICENCE 700 1- Gothe Rainer Institute for Comparative Tropical Medicine and Parasitology, Leopoldstr. 5, 8000, Munich, Germany aut NATIONALLICENCE 700 1- Schöl Heidrun Institute for Comparative Tropical Medicine and Parasitology, Leopoldstr. 5, 8000, Munich, Germany aut NATIONALLICENCE 773 0- Experimental & Applied Acarology Kluwer Academic Publishers 14/2(1992-05-01), 151-163 0168-8162 14:2<151 1992 14 10493 Metadata rights reserved Springer special CC-BY-NC licence nationallicence BK010053 XK010053 XK010000 NATIONALLICENCE NATIONALLICENCE NL-springer