Trouessartia saularis Constantinescu, 2018

Constantinescu, Ioana Cristina, Chişamera, Gabriel Bogdan, Petrescu, Angela & Costică, Adam, 2018, Two new species of feather mites (Acarina: Psoroptidia) from the Oriental Magpie-Robin, Copsychus saularis (Passeriformes: Muscicapidae), Acarologia 58 (2), pp. 313-331 : 321-323

Trouessartia saularis Constantinescu n. sp. ( Figures 5 – 10)

Zoobank: DDA22F74-100B-4863-B579-69860FA8B68A

Type material — Holotype male and 19 paratypes (9 males and 10 females) from Copsychus saularis (Linnaeus) ( Passeriformes : Muscicapidae ), INDONESIA, Kalimantan Island, Lhok Tuan, east of the Kutai National Park , 18 May 1991, bird inventory number 15719-47, no other data.

Type deposition — Holotype male ( ANA 822 ), 7 male ( ANA 823 – 829 ) and 8 female

( ANA 830 – 837) paratypes in MGAB collection, 2 male and 2 female paratypes in DZUnesp-

RC collection.

Etymology — The species epithet is a noun in apposition given after the species name of the type host.

Description — MALE (holotype, range for 4 paratypes) — Length of idiosoma from anterior end to lobar apices (bases of setae h3) 392 (376 – 385), greatest width at level of humeral shields 166 (164 – 178). Length of hysterosoma from sejugal furrow to lobar apices

292 (276 – 292). Prodorsal shield: length along midline 128 (120 – 124), greatest width in posterior part 130 (130 – 132), lateral margins not fused with scapular shields, antero-lateral extensions short and widely rounded, not extending to body margins between bases of legs I, II, posterior margin slightly convex, surface without ornamentation ( Fig. 5). Internal scapular setae si lanceolate, 24 (20 – 24) long, separated by 44 (38 – 44); external scapular setae se situated on prodorsal shield, separated by 80 (80 – 82). Vertical setae ve represented by alveoli. Humeral shields with setae c2 lanceolate, 44 (40 – 46) long. Setae c3 narrowly lanceolate,

with acute apex, 24 (24 – 25) long. Dorsal hysterosoma with prohysteronotal shield and lobar shield connected, delimited from each other by lateral incisions immediately posterior to setae e2 and small desclerotised median area. Prohysteronotal shield length 160 (146 – 154), width at anterior margin 130 (122 – 130), lateral margins deeply incised at level of trochanters III, bottom of these incisions with C-shaped dark sclerotisation, dorsal hysterosomal apertures ( DHA) absent, surface without ornamentation. Dorsal setae d1, d2, e2 present, minute. Lobar shield elongated and narrow, length of lobar shield excluding lamellae 100 (94 – 100). Apical parts of opisthosomal lobes approximate, separated by narrow terminal cleft; length of this cleft from anterior end to apices of lamellae 54 (50 – 56), width in anterior part 6 (6 – 8). Lamellae semi-ovate, distinctly attenuate apically, their inner margins almost touching at level of their midlength, outer margins convex, length from bases of setae h3 to lamellar apices 38 (32 – 40).

Setae h1 anterior to setae h2. Distance between dorsal setae: c2 – d2 72 (72 – 80), d2 – e2 84

(80 – 82), e2 – h280 (72 – 76), h2 – h320 (18 – 22), h2 – h230 (30 – 32), h3 – h328 (28 –

32), d1 – d2 36 (36 – 40), e1 – e2 40 (42 – 47).

Epimerites I free. Rudimentary sclerites rEpIIa small, roughly ovoid. Genital apparatus situated between levels of trochanters III and IV, length 50 (48 – 52), greatest width 20 (18 – 21) ( Fig. 6). Epiandrum present, setae g long and filiform, contiguous at bases, postgenital plaque absent. Adanal apodemes heavily sclerotised, with two narrow lateral membranes and without apophyses. Translobar apodeme present. Adanal shields small, teardrop-shaped, bearing setae ps3. Anal suckers 15 (14 – 16) in diameter. Anterior ends of epimerites IIIa with apices extending beyond level of setae 4b; epimerites IVa short. Setae 4b and 3a situated at the same transverse level, setae g situated posterior to level of setae 4a. Distance between ventral setae: 4b – 3a 31 (30 – 34), 4b – g 70 (64 – 72), g – ps3 38 (38 – 42), ps3 – h3 106 (100 – 105). Setae sR of trochanters III narrowly lanceolate, with pointed apices 17 (17 – 20) long,

setae cG and mG of genua I, II filiform. Tarsus IV 36 (30 – 34) long; seta d barrel-shaped, with discoid cap; seta e hemispheroid, without cap, situated subapically ( Fig. 7D ). Length of solenidia: 𝜎 1 I 34 (30 – 34), 𝜎II 14 (14 – 18), 𝜎III 18 (18 – 22), φ IV 40 (35 – 40).

FEMALE (range for 5 paratypes) — Length of idiosoma from anterior end to apices of lamellar lobar processes 404 – 432, greatest width 162 – 184. Length of hysterosoma from sejugal furrow to apices of lamellar lobar processes 288 – 296. Prodorsal shield shaped as in male, 120 – 130 in length, 128 – 138 in width, surface without ornamentation. Setae si lanceolate, 20 – 24 long, separated by 40 – 44; external scapular setae se situated on prodorsal shield, separated by 80 – 86. Humeral shields with setae c2 lanceolate, 40 – 50 long. Setae

c3 narrowly lanceolate, with pointed apices 25 – 26 in length. Hysteronotal shield length from anterior margin to bases of setae h3 248 – 256, width at anterior margin 114 – 120,

lateral margins incised at level of trochanters III, bottom of these incisions with C-shaped dark sclerotisation, DHA absent, median area from level of setae cp to that of setae h1 with numerous ovate lacunae ( Figure 8). Dorsal setae d1, d2, e2 present. Setae f2 absent. Setae

h1 short spiculiform, surrounded by small ovoid area of unsclerotised tegument, 5 – 6 long, situated antero-mesal to bases of setae h2, 18 – 21 from corresponding lateral margins of hysteronotal shield. Setae ps1 positioned dorsally on opisthosomal lobes, equidistant from outer and inner margins of lobe, close to bases of setae h3. Distance from bases of setae h3 to membranous apices of lobes 24 – 34. Supranal concavity open posteriorly into terminal cleft. Length of terminal cleft together with supranal concavity 98 – 110, width of cleft at level of setae h3 20 – 24. Interlobar membrane occupying anterior 1/3 of terminal cleft, distance from free margin of interlobar membrane to membranous lobar apices 58 – 66. Spermatheca with primary spermaduct terminating ventrally on interlobar membrane, with long collar, bearing fringe of minute spines on posterior margin, length of secondary spermaducts 20 – 26 ( Fig. 10E ). Distance between dorsal setae: c2 – d2 68 – 73, d2 – e2 44 – 50, e2 – h2 94 – 100, h2 –

h344 – 50, h2 – h254 – 60, h3 – h332 – 40, d1 – d2 32 – 40, e1 – e2 46 – 50, h1 – h214 – 16,

h1 – h1 34 – 40, ps1 – h3 9 – 10.

Epimerites I free. Epigynum 42 – 48 in length, 70 – 80 in width ( Figure 9). Epimerites IVa present. Anal opening with two small ovate adanal sclerites situated at level of its anterior end. Setae sR of trochanters III narrowly lanceolate, with pointed apices, 18 – 20 long, setae cG and

mG of genua I, II filiform. Legs IV with ambulacral disc extending to midlevel between setae h2 and h3.

Figures

Figure 7 Trouessartia saularisn. sp., male: A – D details of legs, dorsal view: A – leg I, B – leg II, C – leg III, D – leg IV; E – ventral view of male genital apparatus; Abbreviations: bs – basal sclerite, ea – epiandrum, gp – genital papillae, is – intermedial sclerite, lg – latigenital apodemes, pm – parameres.

Figure 10 Trouessartia saularisn. sp., female: A – D details of legs, dorsal view: A – leg I, B – leg II, C – leg III, D – leg IV; E – spermatheca and spermaducts; Abbreviations: cs – collar of spermatheca, hs – head of spermatheca, pd – primary spermaduct, sd – secondary spermaduct, st – spermatheca.