Neacariscus (Whartonacarus) shiraii (Sasa, Kano & Obata, 1952)

K, Sirikamon Koosakulnirand, RajasegaranK, Praveena, Alkathiry K, Hadil A., ChaisiriK, Kittipong, RoundK, Philip D., Eiamampai, Krairat, Ahmad KhusainiK, Mohd K. S., RamjiK, Mohamad Fizl Sidq, AbubakarK, Sazaly, Ya’cobK, Zubaidah, Stekolnikov K, Alexandr A. & Makepeace K, Benjamin L., 2023, On the taxonomy of chigger mites (Acariformes: Trombiculidae) parasitizing birds in Thailand and Malaysia, with the description of a new species, Acarologia 63 (4), pp. 1109-1138 : 1120

Neacariscus (Whartonacarus) shiraii (Sasa, Kano & Obata, 1952)

( Figs 2F – G , 3B )

Diagnosis — SIF = 7BS-N-2-3111.1000; fPp = B/N/NNN; fCx = 1.1.1; fSt = 2.4; PL> AL

≥ AM (PL> AM> AL); fD = 2H-23-24(20)-18(19)-13(11)-(0 – 2); DS = 77 – 92; V = 85 – 98;

NDV = 162 – 190; Ip = 1381 – 1550; eyes 2 + 2, very large; flagelliform sensilla (trichobothria) with few branches in distal part; sensillary bases anterior to level of PL; solenidion ω () of palpal tarsus long and slender; leg tarsi with multiple sclerite bars. Standard measurements are given in Table 3.

Distribution and hosts — This species was described from Tokyo ( Japan), ex Pluvialis dominica (syn.: Charadrius dominicus ). Later it was recorded on Heron Isl. ( Australia, Queensland), ex Limosa lapponica (L.) ( Charadriiformes : Scolopacidae ); on Guam, ex P. dominica ; on Okinawa Isl. ( Japan), ex Sterna dougalli Montagu ( Charadriiformes : Laridae ); and in Mexico (Sonora), ex Haematopus palliatus Temminck ( Charadriiformes : Haematopodidae ) ( Vercammen-Grandjean & Langston 1976). Here it is for the first time recorded in Thailand and on Xenus cinereus .

Material examined — Two larvae ( ZIN 17981, 17982) ex two Xenus cinereus , THAILAND, Trang province, Samran Beach, 7.209399°N, 99.557854°E, 19 March 2022, coll. S. Koosakulnirand.

Remarks — The form of N. (W.) shiraii from Mexico, with DS = 44 and V = 44 ( Loomis 1966 ; Mertins et al. 2009), probably belongs to some other species.

Figures

Figure 2 Neacariscus(Whartonacarus) andamanensisStekolnikov, n. sp.: A – additional specimen ZIN 17976, dorsal aspect of idiosoma; B – additional specimen ZIN 17976, arrangement of ventral idiosomal setae; C – holotype, humeral seta; D – holotype, central seta of 2nd posthumeral row; E – holotype, preanal seta. Neacariscus(Whartonacarus) shiraii (Sasa, Kano & Obata, 1952), specimen ZIN 17981: F –

Figure 3 Neacariscus(Whartonacarus) andamanensisStekolnikov, n. sp.: A holotype, scutum and eyes; C – additional specimen ZIN 17976, cheliceral blade; D – paratype ZIN 17984, ventral aspect of gnathosoma; E – paratype ZIN 17984, dorsal aspect of gnathosoma. Neacariscus (Whartonacarus) shiraii(Sasa, Kano & Obata, 1952), specimen ZIN 17981: B – scutum and eyes. Abbreviations: AL – anterolateral scutal