Anisocentropus (Anisocentropus) magnificus Ulmer 1907

Ito, Tomiko, Hayashi, Yumiko & Shimura, Noriyoshi, 2012, The genus Anisocentropus McLachlan (Trichoptera, Calamoceratidae) in Japan, Zootaxa 3157, pp. 1-17 : 11-15

Anisocentropus (Anisocentropus) magnificus Ulmer 1907

( Figs. 7–9 )

Anisocentropus magnificus Ulmer 1907 , 54–56, figs. 83–85, pl. 2, male, Philippines; Oláh & Johanson 2010, 29–30, figs. 53– 57, male, as A. (A.) magnificus , Philippines.

? Anisocentropus sp.: Tanida 1997, 449, Yaeyama Islands; Tanida 2003, 373, Iriomote-jima.

Adult ( Figs. 7 , 8 C). Preserved specimens brown, abdomen bright orange in fresh specimens. Body length 6.0–7.0 mm in male and 6.5–10.0 mm in female. Head with large anteromesal wart and pair of large posterolateral warts dorsally; pair of small dorsal and dorsolateral warts indistinct, with only scattered setae in few specimens. Maxillary palpi each 6-segmented, 3.0–4.0 mm long in total, all segments cylindrical and densely covered with long, black hairs. Labial palpi each 3-segmented, about 1 mm in total, all segments cylindrical and densely covered with short, light brown hairs. Antennae brown with black joints, about 15 mm long; scape short and round, pedicel much shorter than scape. Other characters as in A. (A.) kawamurai .

Forewings ( Figs. 7 A, 8C) each with colorful pattern, brown (bright brown in fresh specimens) with large, white, ellipsoidal area in middle, gray blue (blue in fresh specimens) arched band along posterior edge, and blue, round or ellipsoidal areas scattered over remaining membrane; in alcohol, specimens uniformly brown with large, white ellipsoidal areas and few small white dots; 8.0–9.0 mm long in male and 9.5–10.0 mm long in female; apical forks 1, 2, 3, 4 and 5 present; discoidal, median and thyridial cells present in most specimens but discoidal cell sometimes open. Hindwings ( Figs. 7 A, 8C) black in fresh specimens, brown in preserved specimens; each 6.0–6.5 mm long in male and 6.5–7.0 mm long in female; round with broad costal area, apical forks 1, 2, 3 and 5 present; cells open.

Male genitalia ( Fig. 7 ). Tergite and sternite of segment IX ( Fig. 7 B) fused laterally, dorsal edge largely concave in lateral view, lateral margin produced posteriorly into circular lobe. Segment X ( Figs. 7 B, C, E) consisting of roof-like plates; compressed laterodorsally, subquadrate with mesal notch, posterolateral margins expanded laterally in dorsal view, directed slightly ventrad and divided apically in lateral view, with few, short setae on apical part of dorsal surface. Preanal appendages ( Figs. 7 B, C) compressed laterally, oval in lateral view, club-like in dorsal view, with many short and long setae laterally. Phallus ( Figs. 7 D, F) thick and short, with small U-shaped phallotremal sclerite. Inferior appendages ( Figs. 7 B, D, G) thick and short, hump-like in lateral view, thick and parallelsided at basal 2/3rds and abruptly tapered at apical 1/3rd with subacute apices in ventral view, covered with many short and long setae, several thick short spine-like setae present mid-length on mesal margin.

Female genitalia ( Fig. 7 ). Segment VIII ( Figs. 7 H, I) with subquadrate tergite and sternite, sternite with deep mesal cleft and many setae, with trapezoidal projection posteromesally in ventral view. Segment IX ( Figs. 7 H, I) somewhat depressed; sternite divided mesally, each half with many oblique striations; tergite with round apicodorsal margin in lateral view. Segment X ( Figs. 7 H, I) fused with segment IX, covered with many setae, with mesal mound in ventral view and small, short, triangular protuberance ventrally in lateral view. Vaginal sclerite ( Figs. 7 J, K) subtriangular with proximal end narrow in ventral view, long lateral projection directed ventrocaudad in lateral view.

Pupa ( Fig. 7 ). Length up to 12 mm. Paired anterior hook plates each with 3–6 (mostly 6) hooks, paired posterior hook plates each with 10–11 hooks. Abdominal gills arranged as in Table 3. Segment IX with pair of short, subacute tubercles ( Figs. 7 L, M) near posteroventral corners in male, pair of horn-like processes ( Fig. 7 L) dorsomesally at posterior margin and 4 pairs of strong setae dorsally. Anal processes ( Figs. 7 L, M) slender, strongly tapered and curved dorsad posteriorly. Other characters as in A. (A.) kawamurai .

Segment I II III IV V VI VII VIII Dorsal 3 3 3 3 3 3

Lateral 3 2–3 2–3 2–3 2–3 1–2 Ventral 3 3 3 3 3 3

Final instar larva ( Fig. 7 ). Length up to 14 mm. Head ( Fig. 7 N) slightly oblong, width about 0.9 mm at cheeks; dark brown with many light, roundish areas, large pale area on posterior frontoclypeal apotome; 3 pairs of small, light areas arranged as closed parentheses (nearly circle) at anterior frontoclypeal apotome in many specimens but large ones in few specimens, 3–4 pairs of small, pale areas on cheeks, and 6–7 pairs of small pale areas behind frontoclypeal suture and beside coronal suture. In each fore- and middle leg ( Figs. 7 O, P), coxa and trochanter dark brown, femur, tibia and tarsus also brown but each with darker band; tibia with small spines along 2/3rds of posterior margin and 5–6 branched, fan-like spines at apicodistal edges; fan-like spines very small ( Fig. 7 P). In hind leg ( Fig. 7 O), all segments, including each of subdivisions of femur, brown with dark bands. Abdominal gills arranged as in Table 4. Other characters as in A. (A.) kawamurai .

Segment I II III IV V VI VII VIII Dorsal 3 3 3 3 3 3 3 3 Lateral 3 2–3 2–3 2–3 2–3 1–2 1–2 Ventral 3 3 3 3 3 3 1–2 Case. Similar to A. (A.) kawamurai .

Specimens examined. JAPAN. Okinawa. Ishigaki-jima: small tributary, Nagura-gawa, 9 m, Hakusui, 13– 21.x.1999, K. Konishi, M, 3 males, 5 females; ibid., 11.iv.2005, TI, 1 larva; ibid., 11–13.iv.2011, TI, 1 male, 15 larvae; ibid., 13.iv.2011 (pupae), reared and emerged on 15–17.iv.2011, TI, 2 males; ibid., 13.iv.2011 (larvae), emerged on 18.iv–9.v.2011, TI, 9 males, 3 females (4 males, 2 females pinned; others in alcohol); ibid., 13.iv.2011, reared and preserved on 9.v.2011, TI, 9 pupae, 5 larvae. Iriomote-jima: Aira-gawa, 3.v.1997, KT, 1 larva; ibid., 3.v.2006, KT, 1 larva; Otomi, Daiichi-do, 13.xii.1999, NK (NK), 1 male; Aira-gawa, Aira-bashi, 29.iv.2002 (larvae), reared and emerged on 14.vi.2002, T. Fujitani (K. Tanida), 1 male, 1 female.

Remarks. Larvae of Anisocentropus sp. recorded from Iriomote-jima by Tanida (1997, 2003) probably belong to this species because of the collecting locality, though voucher specimens are missing (Kazumi Tanida, personal communication). Males of this species are distinguished by the concave dorsal edge and circular lateral lobe of segment IX ( Fig. 7 B); the divided posteroventral edge of the roof-like plates of segment X ( Fig. 7 B); and thick short inferior appendages with slender apical parts ( Figs. 7 B, D). The forewings of males and females are very colorful in pinned specimens of Ishigaki-jima, in the southern part of the Nansei Islands ( Fig. 8 C), but they are almost entirely brown with white large patterns in alcohol specimens. The color patterns of pinned specimens from Ishigaki-jima are somewhat different from the original description ( Ulmer 1907, pl. 2, fig. 11), in which large dark brown patterns are present at basal half in addition to the features described above. The color patterns of the forewings may vary locally. Female, pupa and larva are newly described. This species, common in the Philippines, is reported from Japan for the first time here.

Distribution ( Fig. 9 ). Japan (Ishigaki-jima, Iriomote-jima), Philippines. New to Japan. Japanese name. Nishiki-koban-tobikera (newly given here).

Figures

FIGURE 7. Anisocentropus (A.) magnificus male, female, pupa and larva. Male (A – G): A, right wings, dorsal; B, genitalia, left lateral; C, same, dorsal; D, same, ventral; E, segment X, ventral; F, phallus, left lateral; G, right inferior appendage, ventral. Female (H – K): H, genitalia, left lateral; I, same, ventral; J, vaginal sclerite, ventral; K, same, left lateral. Pupa (L, M): L, posterior parts, ventral; M, same, left lateral. Larva (N – P): N, head, dorsal (setae not illustrated); O, right pleura and thoracic legs, dorsal; P, right hind tibia, ventral.

FIGURE 8. Right wings of the 3 species, dorsal. A, Anisocentropus (A.) kawamurai (type locality, Nagano, Kizaki-ko, 2011); B, Anisocentropus (A.) pallidus (Hokkaido, Chitose-ko, 2011); C, A Anisocentropus (A.) magnificus (Ishigaki-jima, 2011).

FIGURE 9. Distribution of the 3 species. Plots in Russia, China, and Indochina Peninsula are mainly from Arefina & Levanidova (1997), Yang et al. (2005, as A. minutus) and Malicky (2010, as A. minutus), respectively.