Angulobaloghia staryi, Kontschán, 2015

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

Angulobaloghia staryi sp. nov.

Figs 1-11

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; 1 female, 5 males; same data as for holotype .

Diagnosis: Genital shield subtriangular and its surface with oval pits. Setae V7 and V8 smooth and needlelike, situated near end of pedofossae IV. Setae on dorsal side of body smooth. The new species differs from the other known Angulobaloghia species by the shape (subtriangular and with wide basis) and pit-like ornamentation of the genital shield in females and by the central position of setae V 6 in both sexes.

Description of female: Length of idiosoma 370- 380 μm, width 340-350 μm (n=2). Shape circular, posterior margin rounded, color reddish brown.

Dorsal idiosoma ( Fig. 1 ): Marginal and dorsal shields fused. Dorsal setae basally curved, margins smooth (about 17-23 μm long) ( Figs 2-3 ). Surface with small oval pits ( Figs 2-3 ).

Ventral idiosoma ( Fig. 4 ): Sternal and ventral shields without sculptural pattern, but a linguliform, shallow depression present near setae St1. All sternal setae smooth, needle-like and short (about 5-6 μm long), St1 situated at level of central region of coxae II, St2 at level of posterior margin of coxae II, St3 at level of posterior margin of coxae III, St4 at level of anterior margins of coxae IV, St5 situated at level of pedofossae IV. Ventral setae smooth and needle-like. V2 about 6-7 μm long, situated near basal line of genital shield. V7 and V8 about 15-17 μm long, situated near end of pedofossae IV. Setae ad similar in shape and length to V2 setae, situated laterally to anal opening. V6 setae absent. One pair of lyrifissures situated anterior to St1, one pair near St4, and two pairs of other sensory organs plus one pair of lyrifissures near V7 and V8. Stigmata situated between coxae II and III. Peritremes hook-shaped. Genital shield long and subtriangular, its surface with oval pits and its apical margin rounded. Base of tritosternum narrow, vaselike, tritosternal laciniae smooth, subdivided into three smooth branches in its distal half ( Fig. 6 ). Pedofossae deep, their surface smooth, separated furrows for tarsi IV present.

Gnathosoma ( Fig. 6 ): Corniculi horn-like, internal malae smooth and longer than corniculi. Hypostomal setae as follows: h1 long (about 22-23 μm), smooth and needlelike, h2 and h3 short (about 6-7 μm), smooth and needlelike, h4 marginally serrate and short (about 5-6 μm). Apical part of epistome marginally pilose. Palp with smooth setae. Chelicerae not clearly visible.

Legs ( Figs 7-10 ). All legs with ambulacral claws and smooth and needle-like setae.

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. 11 ): Four pairs of sternal setae situated anterior and one pair posterior to genital shield, these setae smooth, needle-like and about 8-10 μm long (except St3 being about 14 μm). St1 situated near anterior margin of sternal shield, St2 at level of posterior margin of coxae II, St3 at level of posterior margin of coxae III, St4 near anterior margin of genital shield, St5 near posterior margin of genital shield. One pair of lyrifissures situated near St1 and one pair near St4. Surface of sternal shield with numerous oval pits anterior to genital shield. Surface of ventral shield, and shape and size of ventral setae as in female. Genital shield oval and situated between coxae IV.

Larva and nymphs unknown.

Etymology: I dedicate the new species to my colleague and dear friend, to Dr. Josef Starý (Biology Centre AS CR, Institute of Soil Biology, České Budějovice, Czech Republic).

Figures

Figs 1-5. Angulobaloghia staryi sp. nov., female holotype. (1) Body in dorsal view. (2) Setae and ornamentation in central area of dorsal shield. (3) Setae and ornamentation in lateral part of dorsal shield. (4) Body in ventral view. (5) Ventral setae.

Figs 6-11. Angulobaloghia staryi sp. nov., female holotype (6-10) and male paratype (11). (6) Ventral view of gnathosoma, tritosternum and coxae I. (7) Ventral view of leg I. (8) Ventral view of leg II. (9) Ventral view of leg III. (10) Ventral view of leg IV. (11) Ventral view of intercoxal area of male.