Nanotanaupodus gracehallae, Zhang, Zhi-Qiang & Fan, Qing-Hai, 2007

Zhang, Zhi-Qiang & Fan, Qing-Hai, 2007, Allotanaupodidae, a new family of early derivative Parasitengona (Acari: Prostigmata), Zootaxa 1517, pp. 1-52 : 44-49

Nanotanaupodus gracehallae sp. nov.

( Figs 30–34 )

Adult male

Idiosoma elongate, slightly narrowed between bases of legs III and IV; length 550 µm, maximum width 315 µm. Sejugal furrow clearly evident, hysteronotum about twice as long as prodosum ( Fig. 30 ).

Prodorsum. About two-thirds as long (160 µm) as wide (250 µm). Prodorsal plate much longer (185 µm) than wide (125 µm), extending anteriorly beyond anterior edge of propodosoma, with 27 lanceolate setae on each side, anteriormost pair 40 µm long, posteriormost pair 32 µm long. Crista metopica linear, rod-like, 140 µm long, widest anteriorly, ca 7 µm. A pair of lanceolate setae (40 µm) posterolateral to prodorsal plate, each on a platelet. A pair of posterolateral plate each bearing 9 setae of ca 35–40 µm long. Eyes absent.

Hysterosomal dorsum. Hysterosoma with traces of segmentation, each with large lateral plates bearing several to numerous setae.

C row with medial setae each on a platelet, but lateral setae clustered on a pair of large plates; setae 32–40 µm long, all lanceolate.

D row with medial setae (30–35 µm long) each on a platelet, a pair of sublateral plates each with 3 setae (32–40 µm long) and a pair of lateral plates each with 11–12 setae (35–40 µm long).

E row with a pair of lateral plates each with 8 lanceolate setae (35–40 µm long) and numerous lanceolate setae each on a platelet between them (a couple of them have joined platelets) and also a few lateral to them above trochanter III.

F row with similar setal and plate arrangement as in E, but only several setae between the pair of large plates.

H row with a pair of lateral plates each with 18 setae and about 12 setae between them each on a platelet.

PS row with a pair of large plates each bearing numerous lanceolate setae mostly 50 µm long; the pair of plates ventrally touching each other.

Idiosomal venter. Intercoxal area of leg I with 4 short setae (20–34 µm long; posterolateral pair 1a 25 µm long, on its own platelet). Intercoxal area of leg II with 3–4 pairs of setae on a pair of plates. Intercoxal area of leg III with 6 pairs of setae and that of leg IV with several numerous setae not separable from those anterior to genital area. Coxal I with 13–15 setae. Coxa II with 14 setae. Coxa III with 9 setae. Coxa IV with 8–9 setae. Opisthoventer with a large plate enclosing anus and genital area (240 µm long and180 µm wide), with numerous short setiform setae similar to coxal setae. Genital opening 78 µm long. A pair of central valves each bearing 7–8 setae, anterior and posterior ones setiform, but median 3 pairs thickened and branched distally. A pair of lateral valves each bearing 8–9 setae of similar size (up to 20 µm long). Five pairs of eugenital setae, all nude, setiform, the posterior three pairs relatively close together ( Fig. 33 B). Anal opening 85 µm long, its valves each with a pair of setae.

Legs. Length of legs in decreasing order: leg I> leg IV> leg III> leg II.

Leg I 494 µm. Trochanter I with five relatively long setae with strong setulose and two shorter setae. Basifemur I 70 µm. Telofemur I 75 µm. Genu I 85 µm long, with numerous setulose setae and one solenidion. Tibia I 88 µm long, with numerous setulose setae and four solenidia. Tarsus I about twice as long (156 µm) as wide (80 µm), with many setulose setae and solenidia.

Leg II 272 µm. Trochanter II with three long setulose setae and two short nude setae. Basifemur II 52 µm long with 10 setulose setae. Telofemur II 45 µm long with 11 setulose setae. Genu II 50 µm long, with numerous setulose setae and 1 solenidion. Tibia II 48 µm long with numerous setulose setae and one solenidion. Tarsus II 85 µm long, with many strongly setulose setae, two subdistal solenidia and one basal solenidion.

Leg III 315 µm. Trochanter III with seven setulose setae. Basifemur III 60 µm long with eight setulose setae. Telofemur III 45 µm long with 11 setulose setae. Genu III 55 µm long with numerous setulose setae and one solenidion. Tibia III 53 µm long with numerous setulose setae and two solenida. Tarsus III 90 µm long, with many strongly setulose setae and two solenidia.

Leg IV 405 µm. Trochanter IV with seven setulose setae and one short nude seta. Basifemur IV 60 µm long with six setulose setae and one short nude seta. Telofemur IV 80 µm long with 11 setulose setae and two short nude setae. Genu IV 70 µm long with numerous setulose setae and two solenidia. Tibia IV 74 µm long with numerous setulose setae and two solenidia. Tarsus IV 110 µm long with many strongly setulose setae.

Gnathosoma . Subcapitulum smooth with two pairs of adoral setae. Adoral setae: or1 23 µm, or2 20 µm. Subcapitular setae absent.

Cheliceral body 100 µm long, cheliceral blade 45 µm long.

Palp 170 µm long. Palptrochanter with two smooth setae, ca 40 µm long. Palpfemur with seven setae. Palpgenu with six setae. Palptibia with four nude setae, an enlarged seta (16 µm) near base of palptarsus and a

Figures

FIGURE 30. Nanotanaupodus gracehallae sp. n. (adult male). Dorsal view of idiosoma.

FIGURE 31. Nanotanaupodus gracehallae sp. n. (adult male). Ventral view of idiosoma.

FIGURE 32. Nanotanaupodus gracehallae sp. n. (adult male). A, chelicerae; B, subcapitulum; C, palp; D, palpal tarsus; E, anal opening; F, dorsal idiosomal seta; G, ventral idiosomal seta.

FIGURE 33. Nanotanaupodus gracehallae sp. n. (adult male). A, prodorsal shield; B, genital opening; C, eugenital structure; D, eugenital seta.

FIGURE 34. Nanotanaupodus gracehallae sp. n. (adult male). A, leg I; B, leg II; C, leg III; D, leg IV; E, detail view of tarsus I.