Eur. J. Entomol. 115: 134-139, 2018 | DOI: 10.14411/eje.2018.012

Structure and function of the male ventral organ in Onychiuroides granulosus (Collembola: Onychiuridae)Original article

Bożena SIMICZYJEW1, Dariusz SKARŻYŃSKI2, Adrian SMOLIS2, Romuald J. POMORSKI2, Marta MAZURKIEWICZ-KANIA1
1 Institute of Experimental Biology, University of Wrocław, Sienkiewicza 21, 51-335 Wrocław, Poland; e-mails: bozena.simiczyjew@uwr.edu.pl, marta.mazurkiewicz-kania@uwr.edu.pl
2 Institute of Environmental Biology, University of Wrocław, Przybyszewskiego 65, 51-148 Wrocław, Poland; e-mails: dariusz.skarzynski@uwr.edu.pl, adrian.smolis@uwr.edu.pl, onychus@biol.uni.wroc.pl

On the ventral tube of males of Onychiuroides granulosus (Stach, 1934) there is a male ventral organ, which consists of two groups of four setae that are thickened, slightly flattened and bent. All setae of the male ventral organ are inserted in a richly sculptured cuticle. At the base of each seta there are a few large cells (basal cells) that have large irregular nuclei that contain a large amount of heterochromatin. In the cytoplasm of the basal cells there are numerous mitochondria, ribosomes and a rich system of endoplasmic reticulum. The plasma membrane of the basal cells forms richly folded, deep invaginations, filled with a dense material, which also occurs in particular setae and on their surface. The present study indicates that the male ventral organ is secretory and does not confirm its previously suggested sensory function.

Keywords: Collembola, Onychiuridae, Onychiuroides granulosus, springtails, ventral tube, secretory cells, ultrastructure

Received: February 2, 2018; Revised: March 5, 2018; Accepted: March 5, 2018; Published online: April 6, 2018  Show citation

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SIMICZYJEW, B., SKARŻYŃSKI, D., SMOLIS, A., POMORSKI, R.J., & MAZURKIEWICZ-KANIA, M. (2018). Structure and function of the male ventral organ in Onychiuroides granulosus (Collembola: Onychiuridae). EJE, 115, Article 134-139. https://doi.org/10.14411/eje.2018.012
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