Morphological ontogeny of Galumna flagellata Willmann (Acari: Oribatida: Galumnidae)

Abstract

The morphological ontogeny of Galumna flagellata Willmann, 1925 is described and illustrated. The juveniles of this species are light brown, with prodorsal setae of medium size or long and barbed, and bothridial seta clavate. The larva has 12 pairs of gastronotal setae, most of the medium size and barbed, of which seven (d-, l-series, h 1 ) are located on gastronotal shield, nymphs have 15 pairs, mostly short setae, of which 10 (d-, l-, h-series, p 1 ) are located on the gastronotal shield, setae of c-series are inserted on individual sclerites. In all juveniles, the typical galumnid humeral organ is absent, but a porose area is present in this location, which is unique in Galumna.

Morphological ontogeny of Eubelba danubedeltaica sp. nov. (Acari, Oribatida, Damaeidae) and comments on Eubelba Miko

“…Amongst the species compared in Table 5, the presence of seta h 3 in the larva has specific value as in other species of Damaeidae (Norton 1979(Norton , 1980Seniczak & Seniczak 2011, 2013aSeniczak et al 2013Seniczak et al , 2016. Seta h 3 has also specific value in Oribatellidae (Behan-Pelletier 2011; Behan-Pelletier & Walter 2012; Seniczak & Seniczak 2013b;Seniczak et al 2015Seniczak et al , 2020bSeniczak et al , 2021b, and Galumnidae (Seniczak & Seniczak 2007Seniczak et al 2012Seniczak et al , 2021aSeniczak et al , 2022bSeniczak et al , 2023Bayartogtokh & Ermilov 2017), whereas in Scheloribatidae and Phenopelopidae this seta separates the genera (summarized by Seniczak et al 2015).…”

“…ghilarovi Shaldybina, 1969 (Seniczak & Seniczak 2022a; Seniczak et al . 2020a, 2021a, b, 2022a), yet all the above mentioned species were rather abundant, achieving densities of between 42–149 individuals per 500 cm 3 .…”

“…However, the sex ratio varies between seasons (Hubert 2000, Smelyansky 2006, and the density of mites depends on many ecological factors for example, species fertility, mortality, time of development and life expectancy, and type and availability of food (Seniczak et al 2008(Seniczak et al , 2017. A small proportion of males also occurs in populations of other oribatid mites, such as Galumna flagellata Willmann, 1925, Oribatella similesuperbula Weigmann, 2001, Pilogalumna tenuiclava (Berlese, 1908 Punctoribates astrachanicus Shaldybina, 1973, P. ghilarovi Shaldybina, 1969Seniczak et al 2020aSeniczak et al , 2021aSeniczak et al , b, 2022a), yet all the above mentioned species were rather abundant, achieving densities of between 42-149 individuals per 500 cm 3 .…”

Morphological ontogeny of Pilogalumna ayildizi sp. nov. (Acari, Oribatida, Galumnidae), a new cryptic species from Turkey

“…ayildizi are similar to other species of Galumnidae (Sengbusch 1954; Woodring 1965; Seniczak 1971 / 72; Seniczak & Seniczak 2007; Seniczak et al . 2012, 2021, 2022, 2023; Bayartogtokh & Ermilov 2017) by having most prodorsal setae long or of medium size, and spherical gastronotum, with short setae in the nymphs. Some species also have microsclerites at setae p 2 and p 3 and c - and ad -series.…”

“…Some species also have microsclerites at setae p 2 and p 3 and c - and ad -series. In most species, a humeral organ is present except for Galumna flagellata Willmann, 1925 (Seniczak et al . 2021).…”