Rotundabaloghia (Rotundabaloghia) hongkongensis, Kontschán, 2015

Kontschán, Jenő, 2015, Three new rotundabaloghid mites (Acari: Uropodina) from Hong Kong, Revue suisse de Zoologie 122 (1), pp. 45-54 : 48-50

Rotundabaloghia (Rotundabaloghia) hongkongensis sp. nov.

Figs 12-20

Holotype: MHNG, sample SBH-96/19 ; female; Hong Kong (New Territories), Tai Mo Shan Country Park , barrier ravine, petits îlots de forêt, prélèvement de sol entre les racines de Machilus sp. (Lauraceae) , 750 m; 9.XII.1996; leg. B. Hauser (extraction par appareil Berlese à Genève).

Paratypes: MHNG; 6 females, 5 males; same data as for holotype .

Diagnosis: Genital shield linguliform and its surface with irregular pits. Setae V6 and V8 shorter than V2 and V7. Dorsal setae on caudal area wide and marginally pilose. Setae St1 very short, similar in shape and length to St4. Rotundabaloghia (Rotundabaloghia) hongkongensis sp. nov. has three pairs of short setae (St1, V2 and V6) on the ventral part of its body, which is a unique character within the subgenus Rotundabaloghia (Rotundabaloghia) Hirschmann, 1975a .

Description of female: Length of idiosoma 370-380 μm, width 340-350 μm (n=2). Shape of idiosoma circular, posterior margin rounded, color reddish brown. Dorsal idiosoma ( Fig. 12 ): Marginal and dorsal shields fused. Three pairs of setae in row j short, smooth and needle-like (about 12-13 μm), other setae on dorsal idiosoma slightly pilose ( Fig. 13 ) (about 27-30 μm), setae in caudal area of dorsal part wide and spatuliform (about 30-31 μm). Dorsal idiosoma with oval pits ( Fig. 13 ).

Ventral idiosoma ( Fig. 14 ): Sternal and ventral shields with some oval pits. Setae St1 smooth, short (about 8 μm) and needle-like, situated near anterior margin of sternal shield, St2 smooth and long (about 29 μm), situated at level of posterior margin of coxae II, St3 smooth and long (about 31 μm), at level of central area of coxae III, St4 similar in shape and length to St1, at level of anterior margins of coxae IV. St5 absent. Ventral setae smooth and needle-like. V2 and V6 situated near posterior margin of coxae IV, V2 long (about 44-46 μm), V6 short (about 13- 14 μm). V8 short (about 14-15 μm) and situated near end of pedofossae IV. V7 long (about 35-37 μm) and situated between V8 and ad. Setae ad similar in shape and length to V6, lateral to anal opening. Stigmata situated between coxae II and III. Peritremes hook-shaped. Genital shield long and linguliform, surface with irregular pits, its apical margin rounded. Base of tritosternum narrow, tritosternal laciniae smooth, subdivided into three smooth branches ( Fig. 15 ). Pedofossae deep, their surface smooth, separated furrows for tarsi IV present.

Gnathosoma ( Fig. 15 ): Corniculi horn-like, internal malae longer than corniculi and smooth. Labrum apically pilose. Hypostomal setae as follows: h1 long (about 27 μm), smooth and needle-like, h2 (about 13 μm), h3 and h4 short (about 6-7 μm), smooth and needle-like. Apical part of epistome slightly pilose. Palp with smooth setae except for one slightly serrate seta on palp trochanter. Chelicerae not clearly visible.

Legs ( Figs 17-20 ). All legs with ambulacral claws and smooth and needle-like setae, tarsi III and IV with more robust setae than other articles.

Description of male: Length of idiosoma 370-410 μm, width 340-370 μm (n=5).

Dorsal idiosoma: Ornamentation and chaetotaxy of dorsal shield as for female.

Ventral idiosoma ( Fig. 16 ): Four pairs of sternal setae situated anterior to genital shield, these setae smooth, needle-like. St1, St4 and St5 short (about 7-9 μm), St2 and St3 long (about 29-30 μm). St1 situated near anterior margin of sternal shield, St2 situated at level of posterior margin of coxae II, St3 at level of central area of coxae III, near anterior margin of genital shield, St5 near lateral margin of genital shield. Surface of sternal shield with numerous oval pits. Surface of ventral shield, and shape and size of ventral setae as in female. Genital shield circular and situated between coxae IV.

Larva and nymphs unknown.

Etymology: The name of the new species refers to the city ( Hong Kong) where it was collected.

Figures

Figs 12-16. Rotundabaloghia (Rotundabaloghia) hongkongensis sp. nov., female holotype (12-15) and male paratype (16). (12) Body in dorsal view. (13) Dorsal setae and ornamentation. (14) Ventral view of body. (15) Ventral view of gnathosoma, tritosternum and coxae I. (16) Ventral view of intercoxal area of male.

Figs 17-20. Rotundabaloghia (Rotundabaloghia) hongkongensis sp. nov., female holotype. (17) Ventral view of leg I. (18) Ventral view of leg II. (19) Ventral view of leg III. (20) Ventral view of leg IV.