Grallolichus proctogamus ( Trouessart, 1885 )

Lee, Sue Yeon, Yoo, Jung Sun & Kim, Seung Tae, 2017, New record of four Korean feather mites (Acari: Sarcoptiformes: Pterolichidae) isolated from the birds in the family Rallidae, Journal of Species Research 6, pp. 152-163 : 158

3. Grallolichus proctogamus ( Trouessart, 1885)

ȁ닭ǖfflIJḍϢΞή (ṵḓ) ( Figs. 5, 6)

Synonyms. Grallobia proctogamus Dubinin, 1951: p. 132 , 137, fig. 5; 1956, p. 551-555, figs. 269-270.

Grallolichus proctogamus Gaud & Mouchet, 1963, p. 638 , fig. 3; Gaud, 1968, p. 46.

Material examined. Korea: 3♂♂, 3$$, Pyeongchondong, Sangdang-gu, Cheongju-si , Chungcheongbuk-do, 36°35 ʹ 47.22 ʺ N, 127°29 ʹ 52.34 ʺ E, 25 Jan 2017, collected using vacuum machine from wing feathers of the common coot, Fulica atra by Han Y.-D .

Diagnosis. Male: Length 380-390 of idiosoma from anterior end to bases of setae h3, width 150-160 at level of setae c3 ( Fig. 5A).

Gnathosoma ( Fig. 5A): Small and rounded edges, length 53-58 including palps, width 50-55.

Prodorsal shield ( Fig. 5B): Covers the entire prodorsum, surface with irregular reticulate-like ornamentation, length 125-130 along midline, width 155 at level of posterior part, with two internal vertical setae (vi).

Hysteronotal shield ( Fig. 5C, E): Strong sclerotized on hysterosoma, surface with colliculate pattern smaller than prodorsal shield, length 265-275 from anterior margin to bases of setae h3, width 140-155 at level of setae c1. Opisthosomal lobes semicircle-shaped, wide and short.

Sternum ( Fig. 5D): Epimerites I fused into a Y-shape. Genital apparatus gradually thinned from the base towards the distal end, originating in front of setae ps3, longer than half-diameter of the adanal discs including surrounding membrane with radial striae.

Female: Idiosoma length 550-580, width 165-180 at level of setae c3 ( Fig. 6A).

Gnathosoma ( Fig. 6A): Shaped as in male, length 75- 78 including palps, width 70-75.

Prodorsal shield ( Fig. 6B): Mostly shaped as in male, length along center line 165-180, width 140-150.

Hysteronotal shield ( Fig. 6C, E): Shaped as in male, length 405-425 from setae c1 to setae h3, width 185- 195. Pygidial shield clover-shaped, with each side by deep concavity between bases of setae ps2 and f2. Supranal concavity circular-shaped. Soft striated tegument broad, with thick and lanceolate setae h1.

Sternum ( Fig. 6D): Epimerites I Y-shape. Epigynum short and bow-like, length 5-6, width 16-19.

Remarks. Grallolichus proctogamus was originally described by Trouessart (1885) based on the specimens collected from F. atra in Europe. Thereafter, Grallolichus proctogamus was redescribed by several mite taxonomists with detailed morphological descriptions and illustrations ( Dubinin, 1951; 1956; Gaud and Mouchet, 1963; Gaud, 1968). The morphology of the Korean male specimens was consistent with the descriptions and illustrations of Dubinin (1951; 1956).

Grallolichus proctogamus is distinguishable from other species in the genus Grallolichus by several characteristics: (1) dorsal shields with colliculate pattern; (2) genital apparatus gradually thinned from the base towards the distal end, originating in front of setae ps 3 in male; and (3) pygidial shield clover-shaped, with each side having deep concavity between bases of setae ps2 and f 2 in females ( Gaud, 1968).

Host. This species was found on the surface of wing feathers in the common coot, Fulica atra .

World distribution. Bechuanaland, Congo, Rwanda ( Gaud, 1968), France ( Gaud and Mouchet, 1963), USSR ( Dubinin, 1951; 1956), Korea (This study).

Deposition. NIBRIV0000754046 and NIBRIV0000 810175-810179.

Molecular data. The COI sequences were obtained from two individuals and deposited in GenBank with accession numbers of MG545266 and MG545267.

Identifiers. Yeong-Deok Han and Gi-Sik Min.

Family Analgidae Trouessart and Mégnin, 1884 fflũϢΞή⁂

Genus Megniniella Gaud, 1958 ǧḙή꼬HfflũϢΞή‡ (ṵḓ)