Trouessartia cyanouropterae Constantinescu

Constantinescu, Ioana Cristina, Cobzaru, Ioana, Mukhim, D. Khlur B. & Adam, Costică, 2016, Two new species of the genus Trouessartia (Acari, Trouessartiidae) from laughingthrushes (Passeriformes, Leiothrichidae), ZooKeys 571, pp. 59-79 : 61-62

Taxon classification Animalia Passeriformes Trouessartiidae

Trouessartia cyanouropterae Constantinescu sp. n. Figs 1, 2, 3, 4, 5, 6

Type material.

Male holotype (ANA623), 2 male (ANA624, ANA625) and 3 female (ANA626, ANA627, ANA628) paratypes 20.02.2013, from Blue-winged Minla Actinodura cyanouroptera (Hodgson) ( Passeriformes , Leiothrichidae ); INDIA: Meghalaya, Jaintia Hills, Khahnar village, (25°21'57.30"N, 92°36'51.72"E); 954 m; subtropical forest; collector D. Khlur B. Mukhim.

Description.

MALE (Figs 1; 2; 3 A–E; holotype, range for 2 paratypes in parentheses): Length of idiosoma from anterior end to bases of setae h3 344 (331-332), greatest width at level of humeral shields 164 (164-165). Length of hysterosoma from sejugal furrow to bases of setae h3 224 (208-216). Prodorsal shield length along midline 110 (90-95), greatest width in posterior part 122 (118-119), lateral margins not fused with scapular shields, with antero-lateral extensions produced laterally between bases of legs I, II, surface without ornamentation (Fig. 1). Internal scapular setae si filiform, 10 (11-12) long, separated by 50 (48-54); external scapular setae se situated on prodorsal shield, 96 (102-106) long, separated by 82 (80-84). Vertical setae ve represented only by alveoli. Humeral shield with setae c2 filiform, 22 (21-22) long. Setae c3 narrowly lanceolate with acute apex, 12 (13-14) long. Dorsal hysterosoma with prohysteronotal shield and lobar shield connected, delimited from each other by lateral incisions immediately posterior to setae e2 and small desclerotized median area of rectangular form. Prohysteronotal shield length 142 (130-140), width at anterior margin 118 (104-114), lateral margins incised at level of trochanters III, bottom of these incisions with C-shaped dark sclerotisation, dorsal hysterosomal apertures (DHA) absent. Dorsal setae d1, d2 present, minute. Length of lobar shield excluding lamellae 66 (60-70). Apical parts of opisthosomal lobes approximate, separated by narrow terminal cleft, length of this cleft from anterior end to apices of lamellae 30 (28-30), width in anterior part 8 (8-9). Lamellae ovate in general shape, their margins with 5-6 rounded denticles, length from bases of setae h3 to lamellar apices 16 (15-16). Setae h1 anterior to setae h2. Distance between dorsal setae: c2-d2 68 (52-66), d2-e2 83 (74-79), e2-h2 50 (50-51), h2-h3 16 (16-17), h2-h2 34 (32-36), h3-h3 28 (27-30), d1-d2 39 (34-35), e1-e2 35 (31-34). Epimerites I free. Rudimentary sclerites rEpIIa present, roughly triangular. Genital apparatus situated between levels of trochanters III and IV, length 31 (28-29), greatest width 10 (9-10) (Fig. 2). Epiandrum present, small, setae g long and thin, almost touching at bases. Anterior genital papillae more distant from midline than posterior ones, postgenital plaque absent. Adanal apodemes heavily sclerotized, with narrow lateral membrane, without apophyses. Translobar apodeme present. Adanal shields small, triangular, bearing setae ps3. Anal suckers 11 (10-11) in diameter. Anterior ends of epimerites IV exceeding level of setae 4b, epimerites IVa present, wide, anterior ends not reaching level of setae 4a. Setae 4b situated slightly anterior to level of setae 3a, setae g and 4a situated approximately at same transverse level. Distance between ventral setae: 4b-3a 34 (33-34), 4b-g 67 (62-64), g-ps3 46 (44-46), ps3-h3 72 (66-68). Setae sR of trochanters III short, narrowly lanceolate, with acute apex 10 (10-12) long. Tarsus IV 28 (24-25) long, modified setae d and e barrel-shaped, each with discoid cap, situated subapically (Fig. 3D). Legs IV with ambulacral disc extending to level of setae h3.

FEMALE (Figs 4; 5; 6 A–E; range for 3 paratypes): Length of idiosoma from anterior end to apices of lamellar lobar processes 380-388, greatest width 170-176. Length of hysterosoma from sejugal furrow to apices of lamellar lobar processes 260-261. Prodorsal shield shaped as in male, 94-102 in length, 120-130 in width, surface without ornamentation. Setae si thin, filiform, 8-11 long, separated by 51-53, external scapular setae se situated on prodorsal shield, 104-108 long, separated by 70-86. Humeral shields with setae c2 filiform, 22-23 long. Setae c3 narrowly lanceolate, with acute apex, 10-12 in length. Hysteronotal shield length from anterior margin to bases of setae h3 228-232, width at anterior margin 112-116, lateral margins deeply incised at level of trochanters III, bottom of these incisions with C-shaped dark sclerotisation, DHA absent, posterior part with small ovate lacunae (Fig. 4). Dorsal setae d1 present. Setae h1 narrowly lanceolate with blunt apices, surrounded by triangular area of unsclerotized tegument, 8-10 long, situated antero-mesal to bases of setae h2, 17-22 from each lateral margin of hysteronotal shield. Setae ps1 positioned dorsally on opisthosomal lobes, equidistant from outer and inner margins of lobe, closer to base of h2 setae. Distance from bases of setae h3 to membranous apices of lobes 24-26. Setae f2 absent. Supranal concavity closed. Terminal cleft nearly parallel-sided, with tapering anterior end, length 71-74, width of cleft at level of setae h3 16-22. Interlobar membrane occupying anterior ¼ of terminal cleft, its anterior margin roughly rounded, lateral margins wavy; distance from its anterior margin to membranous lobar apices 54-58. External copulatory tube present, extremely short, 1-2 long, protruding from free margin of interlobar membrane. Spermatheca with primary spermaduct thickened in distal part, length of secondary spermaducts 25-30 (Fig. 6E). Distance between dorsal setae: c2-d2 59-71, d2-e2 80-94, e2-h2 42-46, h2-h3 38-42, h2-h2 56-60, h3-h3 36-42, d1-d2 30-41, e1-e2 40-42, h1-h2 14-16, h1-h1 29-34, ps1-h3 22-24. Epimerites I free. Epigynum 38-40 in length, 70-75 in width (Fig. 5). Epimerites IVa present, short. Setae sR of trochanters III narrowly lanceolate, with acute apex, 10-13 long. Legs IV with ambulacral disc extending to midlevel between setae h2 and h3.

Etymology.

The name of the new species derives from the specific name of the type host and is a noun in the genitive case.

Remarks.

The new species Trouessartia cyanouropterae Constantinescu, sp. n. is most similar to Trouessartia creatophorae Mironov & Kopij, 1996, described from Creatophora cinerea (Meuschen) ( Passeriformes , Sturnidae ) in South Africa, ( Mironov and Kopij 1996), in having, in both sexes, a similar shape of the hysteronotal shields with lateral margins deeply incised at the level of trochanters III, DHA absent, setae d1 present, setae c3 and sRIII narrow lanceolate and, in females, an ornamentation of ovoid lacunae in posterior part of the hysteronotal shield. Both sexes of Trouessartia cyanuropterae differ from Trouessartia creatophorae by the following features: setae si and c2 are filiform (vs. setae si are narrow lanceolate, c2 are long, needle-like in Trouessartia creatophorae ). In males of Trouessartia cyanouropterae the margins of lamellae have 5-6 denticles, the rudimentary sclerites rEpIIa are roughly triangular, setae g are almost touching at bases, the genital apparatus is situated between levels of trochanters III and IV, setae e of tarsus IV is with discoid cap. In males of Trouessartia creatophorae the margins of lamellae have 9 denticles, the rudimentary sclerites rEpIIa are ovoid, setae g are separated, the genital apparatus is situated at level of trochanters IV, and seta e of tarsus IV is without a discoid cap. In females of the new species, the external copulatory tube is very short (1-2), setae h1 are narrowly lanceolate, setae ps1 are located closer to the base of h2 setae then to h3. Females of Trouessartia creatophorae have a long external copulatory tube (about 19 long), setae h1 are filiform, setae ps1 are located closer to the base of h3 setae.