Tegonotus platycaryanis, Song, Zi-Wei, Xue, Xiao-Feng & Hong, Xiao-Yue, 2008

Song, Zi-Wei, Xue, Xiao-Feng & Hong, Xiao-Yue, 2008, Eriophyoid mite fauna (Acari: Eriophyoidea) of Gansu Province, northwestern China with descriptions of twelve new species, Zootaxa 1756, pp. 1-48 : 17-18

Tegonotus platycaryanis sp. nov.

( Fig. 4 )

Description. FEMALE: (n = 18) Body fusiform, 143 (125–154), 60 (58–62) wide, 47 (46–49) thick; light yellow. Gnathosoma 13 (12–13), projecting obliquely down, pedipalp coxal setae (ep) 2 (2–3), dorsal pedipalp genual setae (d) 5 (5–6), chelicerae 10 (9–10). Prodorsal shield 43 (41–45), 58 (56–60) wide; frontal lobe present; prodorsal shield design with only complete admedian lines, admedian lines sinuous at anterior 1/3 and cross the scapular tubercles ending on the shield rear margin, prodorsal shield with small pits uniformly distributed. Scapular tubercles ahead of rear margin, 19 (18–20) apart, scapular setae (sc) 3 (3–4) projecting centrad. Coxal area with short lines; anterolateral setae on coxisternum I (1b) 7 (6–7), proximal setae on coxisternum I (1a) 15 (14–15), proximal setae on coxisternum II (2a) 33 (32–32). Prosternal apodeme present. Legs: Leg I 28 (27–28), femur 6 (5–6), basiventral femoral seta (bv) 11 (10–12); genu 4 (3–4), antaxial genual seta (l'') 13 (13–14); tibia 6 (5–6), paraxial tibial seta (l') 3 (3–4), seta located 1/2 from dorsal base; tarsus 5 (4–5), tarsal seta (u') 4 (4–5), tarsal empodium simple, 4-rayed, tarsal solenidion rodlike. Leg II 26 (26–27), femur 5 (4–5), basiventral femoral seta (bv) 12 (12–13); genu 3 (3–4), antaxial genual seta (l'') 4 (3–4); tibia 4 (4–5); tarsus 4 (4–5), tarsal seta (u') 4 (4–5), tarsal empodium simple, 4-rayed, tarsal solenidion rodlike. Opisthosoma: dorsal opisthosoma with 15 (13–16) large annuli, smooth; dorsal opisthosoma with a broad central furrow and lateral lobes, ventrally with 39 (37–40) annuli, with elliptical microtubercles on annular rear margin. Setae c2 18 (16–19) on ventral annulus 8 (8–10); setae d 45 (42–49) on ventral annulus 15 (15– 18); setae e 13 (12–13) on ventral annulus 26 (23–26); setae f 16 (15–17) on 5th ventral annulus from rear. Setae h1 3 (2–3). Female genitalia 12 (12–13), 22 (21–23) wide, coverflap with 8–10 longitudinal ridges, proximal setae on coxisternum III (3a) 10 (9–10).

MALE: (n = 8) Body fusiform, 160 (158–165), 60 (58–61) wide, 45 (45–47) thick; light yellow. Gnathosoma 11 (11–12), projecting obliquely down, pedipalp coxal setae (ep) 2 (2–3), dorsal pedipalp genual setae (d) 6 (5–6), chelicerae 10 (9–10). Prodorsal shield 40 (38–40), 52 (50–55) wide. Scapular tubercles ahead of rear margin, 16 (14–16) apart, scapular setae (sc) 4 (3–4) projecting centrad. Coxal area with short lines; anterolateral setae on coxisternum I (1b) 5 (5–6), proximal setae on coxisternum I (1a) 13 (13–15), proximal setae on coxisternum II (2a) 30 (30–32). Prosternal apodeme present. Legs: Leg I 25 (25–26), femur 6 (5–6), basiventral femoral seta (bv) 10 (10–11); genu 3 (3–4), antaxial genual seta (l'') 12 (10–13); tibia 5 (5–6), paraxial tibial seta (l') 3 (3–4), seta located 1/2 from dorsal base; tarsus 5 (4–5), tarsal seta (u') 4 (3–4), tarsal empodium simple, 4-rayed, tarsal solenidion rodlike. Leg II 23 (23–24), femur 5 (4–5), basiventral femoral seta (bv) 10 (10–12); genu 3 (3–4), antaxial genual seta (l'') 3 (3–4); tibia 4 (4–5); tarsus 4 (4–5), tarsal seta (u') 4 (3–4), tarsal empodium simple, 4-rayed, tarsal solenidion rodlike. Opisthosoma: dorsal opisthosoma with 10 (10–12) annuli, smooth; dorsal opisthosoma with a broad central furrow and lateral lobes, ventrally with 36 (34–36) annuli, with elliptical microtubercles on rear annular margins. Setae c2 15 (15–17) on ventral annulus 6 (6–8); setae d 40 (40–42) on ventral annulus 12 (12–13); setae e 15 (13–15) on ventral annulus 20 (20–21); setae f 15 (15–18) on 5th ventral annulus from rear. Setae h1 2 (2–3). Male genitalia 5 (4–5), 19 (18–21) wide, proximal setae on coxisternum III (3a) 7 (6–9).

Types. Holotype, female, from Platycarya strobilacea Sieb. et Zucc. (Juglandaceae) , Guan’e Gou, Dangchang County, Gansu Province, China, 33°57'39N, 104°19'45E, September 11, 2005, collected by Zi-Wei Song and Xiao-Feng Xue. Paratypes, 8 females and 5 males, with the same data as holotype; 9 females and 3 males from the same host which was located at Foping County, Hanzhong City, Shaanxi Province, China, 33°30'48N, 107°58'52E, September 5, 2004, collected by Zi-Wei Song and Xiao-Feng Xue.

Relation to host. Mites are vagrant on the undersurface of leaves, causing no apparent damage.

Etymology. The specific designation platycaryanis is from the generic name of the host plant, Platycarya .

Remarks. This species is similar to Tegonotus eupators Huang, 2001 , but can be differentiated by prodorsal shield with small pits (prodorsal shield smooth in T. eupators ); coxal area with short lines (coxal area smooth T. eupators ); ventral annuli with elliptical microtubercles (ventral annuli with spiny microtubercles in T. eupators ).

Figures

FIGURE 4. Tegonotus platycaryanis sp. nov. A, dorsal view of female; B, coxae and female genitalia; C, legs I and II; D, lateral aspect of female; E, tarsal empodium; F, male genitalia.