Scutomegninia phalacrocoracis Dubinin and

Lee, Sue Yeon, Yoo, Jung Sun & Kim, Seung Tae, 2017, New record of two Korean feather mites (Acari: Sarcoptiformes: Astigmata) isolated from water birds, Journal of Species Research 6, pp. 177-184 : 178-181

1. Scutomegninia phalacrocoracis Dubinin and

Dubinina, 1940 ÜḆḦŔẹmǧ패fflŭϢΞή (ljḓ) ( Figs. 1­3) Synonyms. Scutomegninia phalacrocoracis : Dubinin, 1951, p. 220, fig. 50; Dubinin and Sosnina, 1952, p. 104; Atyeo and Peterson, 1967, p. 100, figs. 5­8; Mironov, 1990, p. 49, figs. 2-3; Mironov, 2000, p. 13, figs. 3-4.

Material examined. Korea: 3♂♂, 3$$, Namgye­ri, Munui­myeon, Sangdang­gu , Cheongju­si , Chungcheongnam­do, 36°32 ʹ N, 127°29 ʹ E, 10 Jun 2017, collected using vacuum machine from wings feathers in the great cormorant, Phalacrocorax carbo by Han Y.­D .

Diagnosis. Male: Length 460­530 of idiosoma from anterior end to bases of setae h3. Width 315­345 at level of humeral shields ( Fig. 1A).

Gnathosoma ( Fig. 1B): Lateral margins with spine­like process. Length 75­83 including palps, Width 68­75.

Prodorsal shield ( Fig. 1B): Length 100­108 along midline, width 58­70, triangular shape, narrowed in anterior part, lateral sclerites extending at level setae si, posterior part with blunt protrusion, setae vi absent.

Hysteronotal shield ( Fig. 1C): Anterior part slightly sinuous, anterior angles acute, length 325­365 from anterior margin to bases of setae h3, width 195­225 at anterior margin. Anterior part of terminal cleft oval­shape, terminal cleft length 150­158 from anterior end to bases of setae h3, width 80­88 at level of setae ps1. Interlobar membrane extending to lobar ends, with little tooth­like process on each posterior end. Incision in interlobar membrane triangular­shape. Setae h3 slightly enlarged in medial part.

Sternum ( Fig. 1D, E): Epimerites I fused into a Yshape. Epimerites III and IV fused. Genital apodemes fused with internal ends of epimerites IV. Anteromedial part of Adanal shields slightly rounded or rectangularshape. Medial and lateral adanal shields mushroomshape, with many acute teeth on anterior parts. Medial adanal shields not fused, with rounded posterior edges. The posterior edges of lateral adanal shields acute­shaped.

Legs: Apical spine­like processes of tarsi I and II absent. Genua I and II with filiform setae mG. Setae s apex of tarsi III with two adjacent teeth ( Fig. 3A). Tarsi IV with dorsobasal processes ( Fig. 3B).

Female: Idiosoma length 420­430, width 255­265 ( Fig. 2A).

Gnathosoma ( Fig. 2B): Shaped as in male, length 75­ 83 including palps, width 70­72.

Prodorsal shield ( Fig. 2B): Mostly shaped as in male, length along center line 83­95, width 73­75 at level of setae se.

Hysteronotal shield ( Fig. 2C): Anterior margins with bifurcated wing­shaped, posterior part with deep trianglelike incision, length 240­250, width 200­210 at anterior margin. Setae c2 situated inside rather than anterior angles edge of hysteronotal shield. Setae h1 situated off hysteronotal shield.

Pygidial shield ( Fig. 2D): paired, divided from hysteronotal shield.

Sternum ( Fig. 2E): Epimerites I fused. Epigynum length 58­63, width 85­90 at level of setae g. Setae g situated between genital papillae.

Remarks. Scutomegninia phalacrocoracis was originally described by Dubinin and Dubinina (1940) based on specimens collected from Phalacrocorax carbo sinensis in the Volga Delta of Russia.

Scutomegninia phalacrocoracis is distinguishable from other species in the genus Scutomegninia by several characteristics in males: (1) seta s apex of tarsus III with two adjacent teeth; (2) anteromedial angles of adanal apodemes slightly round or rectangular; and (3) length of terminal cleft approximately 1/3 of the idiosoma length ( Mironov, 2000).

Scutomegninia phalacrocoracis is very similar to S. serrulata (Berlese, 1898) with regard to external traits. However, S. phalacrocoracis can be clearly distinguish­ ed from S. serrulata by the following characteristics: length of terminal cleft approximately 1/3 of the idiosomal length in males; setae c2 situated inside, rather than at anterior angles to, edge of hysteronotal shield in females; setae g located between genital papillae in females ( Mironov, 1990; 2000). The morphology of Kore­ an male specimens were consistentwith the descriptions and illustrations provided by Mironov (1990; 2000).

Host. This species was found on the surface of wings feathers in the great comorant, Phalacrocorax carbo .

Distribution. Russia ( Dubinin and Sosnina, 1952), Kazakhstan, Japan, New Zealand ( Mironov, 2000), Korea (this study).

Deposition. NIBRIV0000754006 and NIBRIV0000810 164­0000810168.

Molecular characteristics. The COI sequences with 597 bp lengths were obtained from two individuals (GenBank accession numbers: MG459418 and MG459419). The sequence alignment did not contain any insertions or deletions. No frame shift was detected after amino acid conversion using the invertebrate mitochondrial genetic code.

Identifiers. Yeong­Deok Han and Gi­Sik Min.