Phyllochaeta interifolia ( Mégnin and Trouessart,

Min, Yeong-Deok Han and Gi-Sik, 2019, New record of two feather mites (Acari: Sarcoptiformes: Astigmata) isolated from Actitis hypoleucos in South Korea, Journal of Species Research 8 (2), pp. 225-232 : 228-231

2. Phyllochaeta interifolia ( Mégnin and Trouessart,

1884) üẅƚ요ḆqẍŵűΞή (ṉḡ) ( Figs. 3 , 4 )

Synonyms. Pterolichus interifolia : Mégnin and Trouessart, 1884, p. 433, figs. 53b-c. Thecarthra (Phyllochaeta) interifolia : Oudemans, 1904, p. 192; Dubinin, 1951, p. 203, 205; 1956, p. 678-684, figs. 333-337.

Phyllochaeta interifolia : Gaud, 1972, p. 89; Vasyukova and Mironov, 1991, p 150, 154, fig. 109; Dabert, 2000, p. 313; 2003, p. S59-63, figs. 98-103.

Material examined. Korea: 3♂♂, 2$$, Jeongsanmyeon, Cheongyang-gun , Chungcheongnam-do, 36°22 ʹ 34 ʺ N, 126°56 ʹ 38 ʺ E, 12 Sept 2014, collected from quills of flight feather on the wings of common sandpiper Actitis hypoleucos by Han Y.-D .

Diagnosis. Male: Length 480-500 of idiosoma from anterior end to base of the setae h3, width 240-270 at level of humeral shields ( Fig. 3A ). Prodorsal shield ( Fig. 3B : Triangle-shaped, length 143-153 along midline, width 203-220 at posterior margins. Antero-medial delimitation covered by tubercles. Hysteronotal shield ( Fig. 3C ): Anterior margins straight, with some broken transverse striation at anterior part, length 335-350 from anterior margins to base of setae h3, width 215-235 at level of setae d1. Opisthosomal lobes short and triangle-shaped, with angled protuberance at medial margins. Interlobar cleft triangle-shaped. Postlobar membranes consist of small 3-4 teeth. Sternum ( Fig. 3D ): Epimerites I fused into a Y. Terminal shield located on sternum, rounded triangle-shaped, anterior margins with horn-shaped. Anterior parts of coxal field I and entirety of coxal field II sclerotized. Paragenital apodeme composed of two additional anterolateral, two lateral narrow vertical and one rounded central sclerites. Paragenital sclerites not fused, anterior parts expand to bases of setae g, posterior parts narrow, with genital papillae. Setae cG of leg I, II as massive Y ( Fig. 3E ).

Female: Length 530-550, width 250-260 ( Fig. 4A ). Prodorsal shield ( Fig. 4B ): Shaped as in male, with sinuous posterior margin, length 163-165, width 215-220 at posterior part. Hysteronotal shield ( Fig. 4C ): length 310- 320, width 200-205 at level of setae d1, without lateral incisions. The posterior part of opisthosoma round-shap- ed. Sternum ( Fig. 4D ): Epimerites I fused into a Y, posterior end without terminal shield. Epigynum crescent-shap- ed, with expanded ends, length 25-28, width 35-38. Setae 3a situated at the level of posterior genital papillae. Setae cG of genua I and II thick Y ( Fig. 4E ).

Remarks. Phyllochaeta interifolia was originally described by Mégnin and Trouessart (1884) based on specimens collected from Actitis hypoleucos in Europe.

Phyllochaeta interifolia is easily distinguished from other species in the genus Phyllochaeta by several characteristics: (1) anterior part of hysteronotal shield has a broken striation in males; (2) Postlobar membranes consist of 2-4 teeth in males; and (3) posterior part of epigynum is wider than its anterior part in females ( Dabert, 2003).

Phyllochaeta interifolia is very similar to P. maculariae Dabert, 2003 in terms of appearance. However, P. interifolia can be clearly distinguished from P. maculariae by the following characteristics: pores p1 is present; anterior half of hysteronotal shield has a broken transverse striae in males; and posterior part of epigynum is expanded than its anterior part in females ( Dabert, 2003).

Korean specimens were morphologically consistent with the description and illustrations ( Dabert, 2003).

Host. This species was found on quills of wing feather in the common sandpiper Actitis hypoleucos .

Distribution. Cameroon, Congo, Zambia, ( Gaud, 1972), Europe ( Mégnin and Trouessart, 1884), France, Poland, South Africa ( Dabert, 2000; 2003), Russia ( Dubinin, 1951; 1956; Vasyukova and Mironov, 1991), Korea (this study).

Deposition. NIBR No. NIBRIV0000833408-NIBRIV00 00833412.

Molecular characteristics. The COI sequence were obtained from single individual and deposited in GenBank with accession number of MK031711.

Figures

Fig. 3. Phyllochaeta interifolia, male; A, dorsal view; B, dorsal view of prodorsal shield; C, dorsal view of hysteronotal shield; D, ventral view of hysterosoma; E, setae cG of leg I and II; PA- pregenital apodeme, TS -terminal shield of sternum. Scale bars:A, 0.25 mm; B-D, 0.1 mm; E, 0.025 mm.

Fig. 4. Phyllochaeta interifolia, female; A, dorsal view; B, dorsal view of prodorsal shield; C, dorsal view of hysteronotal shield; D, ventral view of hysterosoma; E, setae cG of leg I and II; eg - epigynum. Scale bars:A, 0.2 mm; B-D, 0.1 mm; E, 0.02mm.