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BY-NC-ND 3.0 license Open Access Published by De Gruyter September 11, 2008

Setal variability of Hydrozetes lemnae and H. thienemanni (Acari: Oribatida: Hydrozetidae)

  • Anna Seniczak EMAIL logo and Stanisław Seniczak
From the journal Biologia

Abstract

Setal variability and the other morphological characters of juvenile stages and adult of Hydrozetes lemnae (Coggi, 1897) and H. thienemanni Strenzke, 1943 were investigated. In the juveniles of both species the length and shape of some setae vary, especially in the gastronotic region, more so in H. lemnae, which is parthenogenetic and reproduces by thelytoky, than in H. thienemanni, which is dioecious. The former species usually has more thick setae in the anterior and medial regions of the gastronotum, especially in the larva, compared to the latter. In the juveniles of H. lemnae the prodorsal setae le and in are longer, and in the nymphs the gastronotal setae of the l-series are usually longer than in H. thienemanni. These species differ distinctly by the number of long setae in the posterior part of the nymphs; in H. lemnae three pairs of long setae occur, while in H. thienemanni only two pairs; the respective juvenile stages of H. lemnae are also smaller than those of H. thienemanni. In the adults the number of c-series setae varies, as seta c 1 is lost, and in some individuals also seta c 3, and only seta c 2 remains.

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Published Online: 2008-9-11
Published in Print: 2008-10-1

© 2008 Slovak Academy of Sciences

This work is licensed under the Creative Commons Attribution-NonCommercial-NoDerivatives 3.0 License.

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