Depressorotunda malayana, Kontschán, 2010

Kontschán, Jen ỏ, 2010, Depressorotunda gen. nov., a new remarkable Uropodina mite genus from South-East Asia with description of four new species (Acari: Mesostigmata), Journal of Natural History 44 (23 - 24), pp. 1461-1473: 1463-1465

publication ID 10.1080/00222931003678784

persistent identifier

treatment provided by


scientific name

Depressorotunda malayana

sp. nov.

Depressorotunda malayana   sp. nov.

( Figures 1 View Figure 1 , 2 View Figure 2 and 3 View Figure 3 D–G)

Material examined

Holotype: female, Malaysia, Selangor, Ulu Kanching Templer Park , soil from forest floor, 27 July 1962, leg. Nadchatram.   Paratype: three males, locality and date same as holotype. The holotype and two paratypes are stored in alcohol ( NHM). One paratype with gold–palladium coating stored on aluminium stub ( HNHM)   .


Female. Length of idiosoma 270 µm, width 220 µm. Shape oval, posterior margin rounded.

Dorsal idiosoma ( Figure 1A View Figure 1 ). All dorsal setae long (c. 20–32 µm), wide and setiform, their margins with short hairs ( Figures 1B,C View Figure 1 ). Sculptural pattern of dorsal shield lacking.

Ventral idiosoma ( Figure 1D View Figure 1 ). Tritosternum not clearly visible. Whole surface smooth, without ornamentation. Sternal setae st1 short, smooth and needle-like, other sternal setae broken at their bases. Genital shield linguliform, with triangular anterior process. Ventral cavity large, almost horseshoe-like, anterior margin near the basis of genital shield, posterior margin reaches the anus. Position of ventral setae are as follows: V1 (c. 24 µm) placed near the basis of the genital shield in the ventral cavity. V2 (c. 38 µm), V3 (c. 36 µm) and V4 (c. 35 µm) can be found on the lateral margins of the ventral cavity. All of ventral setae long, smooth and setiform. Stigmata situated at the level between coxae II and III. Peritremes hook-shaped.

Gnathosoma. Not clearly visible (covered by coxae I).

Male. Length of idiosoma 240–260 µm, width 210–220 µm (n = 3). Shape oval, posterior margin rounded.

Dorsal idiosoma. Surface and chaetotaxy of dorsal shield as for the female ( Figure 3D View Figure 3 ).

Ventral idiosoma ( Figures 2A View Figure 2 and 3E,F View Figure 3 ). Sternal shield without ornamentation. Sternal setae smooth, short (4–6 µm) and needle-like. Ventral setae similar to those of the female. Ventral cavity large, its anterior margin can be found near the anterior margin of sternal shield, posterior margin same as that of the female. Genital shield circular, situated almost between coxae IV and placed in the ventral cavity ( Figures 2A View Figure 2 and 3E,F View Figure 3 ). All legs with a pair of ambulacral claws and with smooth simple setae ( Figure 3G View Figure 3 ). Tritosternum ( Figure 2C View Figure 2 ) with narrow basis and trifurcate lacinia.

Gnathosoma ( Figure 2B View Figure 2 ). Internal malae long and serrate marginally. Hypostomal setae h1 long (c. 35 µm), smooth, setiform; h2 short (c. 8 µm), smooth and setiform; h3 (c. 16 µm) longer than h2 but shorter than h1, setiform, with serrated margin; h4 as long as h2, setiform (c. 10 µm), with serrated margins. Epistome with serrated margin, apical part bears short hairs. Palp with smooth and simple setae, but trochanter bears one large seta; this seta with small submedial denticle on each lateral margin. Chelicerae not clearly visible, fixed digit longer than movable digit ( Figure 2B View Figure 2 ).

Nymphs and larvae. Unknown.


The name malayana   refers to its country ( Malaysia) of origin.


University of Nottingham


Hungarian Natural History Museum (Termeszettudomanyi Muzeum)