Galumna acutirostrum

Specimens of G. acutirostrum were first gathered from sandy soil in a dipterocarp forest of Cát Tiên National Park in 2009. In 2010, the species was diagnosed as its own seprate species in a study by Russian scientists Sergey Ermilov and Alexander Anichkin from the University of Tyumen and the Russian Academy of Sciences respectively.^[1]

G. acutirostrum is a rotund oribatid mite of the Galumna genus.^[2] The species is distinguished from other members of its genus by the size of its body, the shape of its head and its setae; and its pointed rostrum, a feature from which its name is derived.^[1] Like all Galumna mites, the body is segmented and divided into several main divisions; the thorax, the gnathosoma, and both anogenital and epimeral regions near the rear of the body.^[3][1] The entire body is smooth, and brown to dark brown in coloration.^[1] The gnathosoma is characterized primarily by the presence of the distinct rostrum, but is also distinct for its long, brush-like and slightly barbed setae present near the mouth area.^[1] The sensilli, which is present below the teeth of the species, is somewhat fusiform.^[1] The head is indistinguishable from the rest of the body.^[1] In the anogenital region, the mite has two pairs of anal setae, which are very small. The genital plate is thin, and slightly barbed.^[1] The teeth, present in the chelicera, are blunt and only slightly mobile.^[1]

G. acutirostrum varies in length from 747 to 846μm, and in width from 630 to 680μm.^[1]

The particular combination of traits present in G. acutirostum is rare. The only other species to have similar morphology is Galumna grandjeani, a species from Central Africa.^[1] Some traits are shared by Galumna Valida, a species from Micronesia;^[1] and Galumna kebangica, a species from Vietnam.^[4]