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DOI: http://dx.doi.org/10.11158/saa.23.4.7

Morphological ontogeny of Melanozetes stagnatilis (Acari, Oribatida, Melanozetidae)

Anna Seniczak, Stanisław Seniczak

Abstract


The morphological ontogeny of Melanozetes stagnatilis (Hull, 1914) is described and illustrated. The juveniles of this species have a humeral organ and a humeral macrosclerite, bearing seta c1, which occur in most species of Sphaerozetinae (Ceratozetidae), but also have well-developed lamellae, without the translamella, which is unique in Sphaerozetinae. The juveniles have a gastronotal shield, with seven pairs of setae in the larva (d-, l-series and h1), and 10 pairs in the nymphs (d-, l-, h-series and p1), and setae p2 and p3 are inserted on a large ventral macrosclerite. The legs of juveniles and adult are stocky, with large and flattened femora I and II, having a large ventral carina. The adult of M. stagnatilis has well-developed lamellae, with a translamella, and 14 pairs of notogastral setae, but the number of porose areas varies from six to eight, which is unique in Melanozetes Hull, 1916.


Keywords


oribatid mites, Sphaerozetinae, juveniles, leg setation, stage structure

References


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