Contributions to the knowledge of oribatid mites (Acari, Oribatida) of Indonesia. 3. The genus Galumna (Galumnidae) with description of a new subgenus and seven new species

Abstract

Seven new species of oribatid mites of the genus Galumna are described from litter and soil materials of Sumatra, Indonesia. A new subgenus, Galumna (Atypicogalumna) subgen. n., is proposed; it differs from all galumnid genera and subgenera by the simultaneous presence of porose areas and sacculi on the notogaster (vs. either porose areas or sacculi present). Galumna (Galumna) calva Starý, 1997 is recorded for the first time in the Oriental region, and Galumna (Galumna) sabahna Mahunka, 1995 is recorded for the first time in the Indonesian fauna.

New species of Flagellozetes (Cosmogalumna) (Acari, Oribatida, Galumnidae) from Vietnam

“…In having neural ridges on the notogaster and in anogenital region, a median pore, four pairs of notogastral porose areas, short circumpedal carina, and the absence of stria on pteromorph, Flagellozetes (Cosmogalumna) pseudoareticulatus sp. n. is morphologically most similar to F. (C.) areticulatus (Ermilov, Sandmann, Klarner, Widyastuti et Scheu, 2015) from the Oriental region. However, the new species differs from the latter by the comparatively long lamellar seta, ro = le (versus short, ro/le = 2.7), the localization of notogastral lyrifissure im (close and anterior to A1 versus between lm and lp, equally removed from them) and adanal seta ad 3 (lateral to iad versus anterolateral to iad), the position of aggenital seta (equally distanced from genital and anal apertures versus located closer to genital aperture), and by comparatively small area with neural ridges in anogenital region and on the notogaster (versus areas with ridges clearly larger).…”

“…Representatives of Flagellozetes (Cosmogalumna) are forming two large groups of species depending on the ornamentation on the notogaster: 1) with reticulate pattern (11 species); 2) with neural ridges (nine species). Species of the second group are: F. (C.) areticulatus (Ermilov, Sandmann, Klarner, Widyastuti et Scheu, 2015); F. (C.) carinodentatus sp. n.; F. (C.) ekaterinae (Ermilov & Friedrich, 2016); F. (C.) kirishimaensis (Hagino et Shimano, 2017) (Ermilov, Sandmann, Klarner, Widyastuti et Scheu, 2015).…”

“…Species of the second group are: F. (C.) areticulatus (Ermilov, Sandmann, Klarner, Widyastuti et Scheu, 2015); F. (C.) carinodentatus sp. n.; F. (C.) ekaterinae (Ermilov & Friedrich, 2016); F. (C.) kirishimaensis (Hagino et Shimano, 2017) (Ermilov, Sandmann, Klarner, Widyastuti et Scheu, 2015). They are very similar, therefore, despite the identification key to know taxa within subgenus (Ermilov & Corpuz-Raros 2022), we present below Table 2 including a complete set of morphological differences that will allow more clearly distinguishing species with neural ridges on the notogaster.…”

“…Etymology. The species name pseudoareticulatus refers to the similarity of the new species and Flagellozetes (Cosmogalumna) areticulatus (Ermilov, Sandmann, Klarner, Widyastuti & Scheu, 2015).…”

A new species of the genus Flagellozetes Balogh, 1970 (Acari: Oribatida: Galumnidae) from Taiwan

“…At present, the oribatid mite fauna of Taiwan is briefly investigated, and only two species of Flagellozetes were registered (Ermilov & Liao, 2018): Flagellozetes (Cosmogalumna) areticulatus (Ermilov, Sandmann, Klarner, Widyastuti et Scheu, 2015) and F. (C.) ornatus (Aoki, 1988).…”