Oligonychus camelliae n. sp.

(Figs. 1–11)

(Japanese name: Tsubaki-tsumehadani)

Description. FEMALE. Body reddish brown. Rostrum reaching distal portion of femur I (Fig. 1). Palpus (Fig. 2) with spinneret about 1.5 times as long as broad; dorsal sensillum (solenidion) fusiform. Peritreme dilated at distal end (Fig. 4). Dorsal setae on idiosoma longer than distances between bases of consecutive setae; f2 about 4/5 as long as f1 (Fig. 1). Dorsocentral striae transverse except for V- shaped pattern between and anterior to e1 setae (Fig. 1). Genital flap with transverse striae; area immediately anterior to flap with longitudinal striae.

Numbers of setae and solenidia (in parentheses) on leg segments: coxae 2-2-1-1, trochanters 1-1-1-1, femora 8-6-2-1, genua 5-5-2-2, tibiae 7(1)-5-5-5, tarsi 11(1)+ 2 dupl.-12(1)+ 1 dupl.-8(1)-8(1). Tarsus I with 3 tactile setae and 1 solenidion proximal to proximal set of duplex setae (Fig. 8); tarsus II with 3 tactile setae and 1 solenidion proximal to duplex setae (Fig. 9). Empodia with 5 pairs of proximoventral hairs.

Measuremenƭs (n=₁Ο﹚∶ Iɵngɭh Οf bΟđy (incIuđing rΟSɭrum﹚ 4ɜ₁–ϭ₁4﹐ 4⁶²﹔ wiđɭh Οf bΟđy ²₉⁶– ɜϭ4﹐ ɜ²²﹔ IɵngɭhS Οf Sɵɭaɵ (mɵan SE﹚∶ V² ₉4 ₁•₁﹐ Sc₁ ₁²⁶•4 ₁•₁﹐ Sc² ₁Ο₁•7 ₁•₁﹐ c₁ ₁₁₁•₉ ₁•Ο﹐ c² ₁₁₁•⁸ ₁•ɜ﹐ cɜ ₁Ο²•ϭ ₁•Ο﹐ đ ₁ ₁₁4 •² Ο•₉﹐ đ ² ₁₁⁸ •Ο Ο•₉﹐ ɵ ₁ ₁₁ɜ •² ₁•₁﹐ ɵ ² ₁₁₉ •² ₁•₁﹐ f₁ ₁Ο4•ɜ ₁•Ο﹐ f² ⁸ϭ•⁶ Ο•⁸﹐ h₁ ϭ⁶•Ο Ο•ϭ•

MALE. Color similar to female. Palpus (Fig. 3) with spinneret about twice as long as broad; dorsal sensillum fusiform. Dorsocentral striae on opisthosoma similar to female. Aedeagus with shaft rectangularly downcurved to transform distally to a very slender termination (Figs. 5–7).

Numbers of setae and solenidia (in parentheses) on leg segments: coxae 2-2-1-1, trochanters 1-1-1-1, femora 8-6-2-1, genua 5-5-2-2, tibiae 7(4)-5-5-5, tarsi 11(3)+ 2 dupl.-12(1)+ 1 dupl.-8(1)-(8). Tarsus I with 3 tactile setae and 3 solenidia proximal to proximal set of duplex setae (Fig. 10); tarsus II with 3 tactile setae and 1 solenidion proximal to duplex setae (Fig. 11). Empodium I with 3 pairs of proximoventral hairs; empodium II with 4 or 5 pairs of proximoventral hairs; empodia III and IV with 5 pairs of proximoventral hairs.

Measuremenƭs (n=₁Ο﹚∶ Iɵngɭh Οf bΟđy (incIuđing rΟSɭrum﹚ ɜ⁸ɜ–4ɜϭ﹐ ɜ₉₉ (ɜ⁸4 ﹚﹔ wiđɭh Οf bΟđy ₁₉⁸–²ɜ7﹐ ²₁⁸ (-﹚﹔ IɵngɭhS Οf Sɵɭaɵ (mɵan SE﹚∶ V² 7₉•² Ο•₉ (⁸Ο•Ο﹚﹐ Sc₁ ₉7•⁸ ₁•4 (₉₉•ϭ﹚﹐ Sc² ⁸ϭ•Ο

Ο•₉ (⁸⁸•Ο﹚﹐ c₁ ₉Ο•Ο Ο•⁶ (⁸⁸•Ο﹚﹐ c² ₉₁•7 ₁•Ο (₉4•ϭ﹚﹐ cɜ ⁸7•² ₁•ɜ (⁸ϭ•Ο﹚﹐ đ₁ ₉Ο•ϭ ₁•₁ (⁸⁸•ϭ﹚﹐ đ² ₉4•Ο ₁•ɜ (₉Ο•Ο﹚﹐ ɵ₁ ⁸7•² ₁•₁ (⁸7•Ο﹚﹐ ɵ² ₉Ο•₁ Ο•⁸ (₉Ο•Ο﹚﹐ f₁ 74•₁ Ο•7 (7²•Ο﹚﹐ f² ϭ7•⁶ ₁•Ο (ϭ⁸•Ο﹚﹐ h₁ ɜ7•₁ Ο•⁶ (ɜ7•ϭ﹚•

Type series. Holotype male (NSMT-Ac 12444): Shinobuyama, Fukushima, Fukishima Pref., Honshu, 13 May 2000 (T. Gotoh & Y. Kitashima leg.), on Camellia japonica L. ( Theaceae). Paratypes: 6 males (NSMT- Ac 12445-12450) & 10 females (NSMT-Ac 12451-12452), 3 males & 5 females (KUM), data same as for holotype.

Remarks. The female of the new species resembles that of a Japanese species Oligonychus ilicis (McGregor, 1917), but differs in having the dorsal idiosomal setae not arising from tubercles, and setae f2 about 4/5 the length of f1. This species is also similar to O. letchworthi Reeves, 1963 from New York State but is reddish brown in color, while the latter is green (Reeves, 1963).

Etymology. This species is named after the generic name of the host plant, Camellia .