Ingrassia veligera ( Oudemans, 1904 )

Min, Yeong-Deok Han and Gi-Sik, 2019, Three feather mites (Acari: Sarcoptiformes: Astigmata) isolated from Tringa glareola in South Korea, Journal of Species Research 8 (2), pp. 215-224 : 221-222

3. Ingrassia veligera ( Oudemans, 1904)

ỄDÜHƞḡūűΞή(ṳÿ) ( Figs. 5 , 6 )

Synonyms. Megninia veligera : Oudemans, 1904, p. 194; Ingrassia veligera : Vasjukova and Mironov, 1991, p. 69-72, fig. 49; Dabert, 2000, p. 310, fig. 3.

Material examined. Korea: 3♂♂, 2$$, Gyeolseongmyeon, Hongseong-gun , Chungcheongnam-do, 36°31 ʹ 36 ʺ N, 126°33 ʹ 41 ʺ E, May 11, 2016, collected using vacuum machine from tail feathers of wood sandpiper Tringa glareola by Han Y.-D .

Diagnosis. Male: Length 380-395 of idiosoma from anterior end to ends of terminal membranes, width 150-155 at level of humeral shields ( Fig. 5A ). Prodorsal shield ( Fig. 5B ): Narrow longitudinal plate with rounded posterior margin, posterior part extending beyond the level of setae si, length 85-92 along midline, width 17-23. Setae se situated on small sclerites. Scapular shield narrow with broad and blunt posterior part. Hysteronotal shield ( Fig. 5C ): Anterior margin sinuous, with incisions of long and soft tegument at level of setae d2, length 212-220 from anterior part to base of setae h3. Sternum ( Fig. 5D ): Epimerites I fused. Inner ends of epimerites IIIa sparated from each other. Genital papillae located in front of the pregential apodeme. Pregential apodeme bow-shaped, width 20-25. Adanal shields small L-shaped, between levels of setae g and ps3.

Female: Length 340-350 of idiosoma from anterior end to bases of setae h3, width 120-135 at level of setae c2 ( Fig. 6A ). Prodorsal shield ( Fig. 6B ): Shaped as in male, Length 77-80, width 22. Hysteronotal shield ( Fig. 6B, 6D ): Anterior margin rounded, lateral margins slightly sinuous, posterior margin slightly concave, extending beyond the level of setae e2, length 122-125, width 42-45. Setae d1 and e1 located on the hysteronotal shield, and setae d2 on lateral margins. Epigynum shaped as transverse sclerite, almost straight and thin, width 20 ( Fig. 6C ). Posterior ends of oviporus apodemes not extending to the level of setae 4a.

Remarks. Ingrassia veligera was originally described without illustration by Oudemans (1904) based on specimens collected from the lesser yellowlegs ( Tringa flavi­ pes) in Guyana, then was redescribed by Vasjukova and Mironov (1991) with partial illustrations from several sandpipers of the genus Tringa ( T. glareola , T. nebularia and T. ochropus ). Thereafter, the dorsum part of this species was re-illustrated by Dabert (2000) from T. stagnatilis in Poland.

Ingrassia veligera can be clearly distinguished from I. slonskiana by the following characteristics: (1) posterior margins of scapular shields are widened and blunted; (2) hysteronotal shield has long desclerotized incisions from anterior margin to level of setae d 2 in males; (3) lengths of setae d2 and e2 are similar in females ( Dabert, 2000). The Korean specimens were consistent with the descriptions and illustrations provided by previous mite taxonomists ( Oudemans, 1904; Vasjukova and Mironov, 1991; Dabert, 2000).

Host. Specimens were collected from down feathers of wood sandpiper Tringa glareola .

Distribution. Guyana ( Oudemans, 1904), Russia (Vasjukova and Mironov, 1991), Poland ( Dabert, 2000), Korea (this study).

Deposition. NIBR No. NIBRIV0000820675-820679.

Molecular characteristics. The COI sequence was obtained from single individual and deposited in GenBank with accession number of MK031706.

Figures

Fig. 5. Ingrassia veligera, male.A, dorsal veiw; B, dorsal view of prodorsal shield; C, dorsal view of hysterosoma; D, ventral viewe of hysterosoma. Scale bars:A, 0.2 mm; B-D, 0.1 mm.

Fig. 6. Ingrassia veligera, female.A, dorsal veiw; B, dorsal view of idiosoma; C, ventral view of idiosoma; D, ventral viewe of opisthosoma. gp-genital papillae. Scale bars:A, 0.2 mm; B-D, 0.1 mm.