51 research outputs found
FIGURE 4 in Notes on six microcaddisfly species (Trichoptera: Hydroptilidae) recorded for Japan, one a newly described species
No full textFIGURE 4. Male of Hydroptila parapiculata Yang & Xue 1994, genitalia. 4A, left lateral; 4B, dorsal; 4C, ventral; 4D, phallic apparatus, left lateral. Abbreviations: VII–IX = abdominal segments VII–IX; ae. = aedeagus; d.pl. = dorsal plate; d.pr. = dorsal process; i.a. = inferior appendage (paired); s.pl. = subgenital plate; ti. = titillator. Scale bars for 4A and 4D = 0.1 mm.Published as part of Ito, Tomiko & Shimura, Noriyoshi, 2019, Zootaxa 4629 (1) on pages 26-38, DOI: 10.11646/zootaxa.4629.1.2, http://zenodo.org/record/326826
FIGURE 1 in Notes on six microcaddisfly species (Trichoptera: Hydroptilidae) recorded for Japan, one a newly described species
No full textFIGURE 1. Male of Hydroptila nago Ito sp. nov., genitalia. 1A, left lateral; 1B, dorsal; 1C, ventral; 1D, phallic apparatus, dorsal; 1E, apical 1/4 of phallic apparatus, dorsal. Abbreviations: VII–IX = abdominal segments VII–IX; ae. = aedeagus; d.pl. = dorsal plate; d.pr. = dorsal process; ej.du. = ejaculatory duct; i.a. = inferior appendage (paired); s.pl. = subgenital plate; ti. = titillator. Scale bars for 1A and 1D = 0.1 mm.Published as part of Ito, Tomiko & Shimura, Noriyoshi, 2019, Zootaxa 4629 (1) on pages 26-38, DOI: 10.11646/zootaxa.4629.1.2, http://zenodo.org/record/326826
Hydroptila nago Ito & Shimura 2019, sp. nov.
No full textHydroptila nago Ito sp. nov. (Fig. 1) Hydroptila sp.: Ito, 2015, 15, Okinawa-jima. Diagnosis. The male of this species is similar to that of Hydroptila dorsoprocessuata Botosaneanu 1993, known in eastern Russia, in having a long dorsal process on segment IX, an elongate-rectangular semi-membranous dorsal plate, and long triangular inferior appendages. However, H. nago is clearly discriminated from H. dorsoprocessuata as follows: The aedeagus is bifurcate in H. nago but single in H. dorsoprocessuata; and in lateral view, the subgenital plate is extended caudad to near the tip of the inferior appendages in H. nago, but is relatively short, reaching only to the middle of the inferior appendages in H. dorsoprocessuata. Description. Male. Wings brown in alcohol. Forewings each 1.6–1.9 mm long, hind wings each 1.2–1.3 mm long (n = 2). Antennae brown, 1.2–1.3 mm long, 21–23-segmented (n = 2). Short ventromesal process on abdominal segment VII. Male genitalia (Figs 1 A–1E). Segment IX moderately long with anterior margin produced into long dorsal process (d.pr.) at middle of posterior margin in lateral and dorsal views. Dorsal plate (d.pl.) mostly membranous, elongate-rectangular with shallow middle apical excavation in dorsal view. Subgenital plate (s.pl.) subrectangular in basal half in ventral view, abruptly produced distally in long bar with apical seta. Inferior appendages (i.a.) long without any lobes, rod-like in lateral view, long-triangular in ventral view. Phallic apparatus with short titillator (ti.) at basal 1/3, aedeagus (ae.) and sclerotized sclerotized extension of ejaculatory duct (ej.du.) directed caudad, almost straight; aedeagus bifurcate, each half acute apically. Female. Unknown. Holotype. Male, Japan, Ryukyu, Okinawa-jima, Nago-shi, Genka, Genka-gawa, Hogen-hashi (26.6292 N, 128.0847 E, 90 m above sea level, 8.iv.2011, T. Ito, light trap (CBM-ZI 167018). Paratype. 1 male, type locality, 17–19.x.2014, T. Ito, light pan trap (CBM-ZI 167019). Etymology. The name “ nago ” is a noun in apposition, coined from the type locality. Distribution. Japan (Ryukyu: Okinawa-jima). Remarks. The adults of this species were collected near fast-flowing rivers with stony substrates. Japanese name. Nago-hime-tobikera.Published as part of Ito, Tomiko & Shimura, Noriyoshi, 2019, Notes on six microcaddisfly species (Trichoptera: Hydroptilidae) recorded for Japan, one a newly described species, pp. 26-38 in Zootaxa 4629 (1) on pages 26-38, DOI: 10.11646/zootaxa.4629.1.2, http://zenodo.org/record/326826
Goera rupicola Nozaki & Shimura 2020, sp. nov.
No full textGoera rupicola sp. nov. (Figs. 1C, 2, 3) Goera sp.: Shimura et al. 2014, 47, 59. Diagnosis. The male of this species can be readily recognized from congeneric members by the simple tergum X bearing only a median dorsal process. The female of this species is distinguishable from those of other known Japanese species by the shape of the supragenital plate: In ventral aspect, the posterior margin of the supragenital plate is slightly concave in this species, but convex (round or acute) in other known Japanese species (Nozaki & Tanida 2006; Nozaki 2017). The larva of this species is easily distinguishable from that of G. akagiae distributed in Amami-Oshima: The head is mostly reddish brown in this species, but bears a pale transverse band posterodorsally in G. akagiae (Nozaki 2018). Adult (Figs. 2A, 2B, 2C, 2I). Body, wings, antennae dark brown in alcohol. Forewings 4.8–5.8 mm long (n = 8) in male, 4.8–6.3 mm long (n = 5) in female. Wing venation typical for genus. Antennae slightly longer than forewings; scape long, approximately 2 times longer than head length in male, 1.5 times longer than head length in female. In male, maxillary palpi with 2nd segment long and triangular in frontal aspect; large membranous lobe arising from base of 2nd segment, elastic, constricted in middle, with scales on mesal surface and long setae on apical half of outer surface, with finger-like lobe apicomesally. Tibial spurs 2-4-4, outer apical spur of each foretibia less than 1/2 length of inner one. Male abdominal sternite VI with 8–15 processes (n = 8); central one spatula-shaped, longer than other spine-like ones. Female abdominal sternite VI bearing 8–10 minute processes (n = 5), central one larger than others. Male genitalia (Figs. 2 D–2H). Segment IX short in lateral aspect, ventromesal lobe short triangular in ventral aspect. Preanal appendages very long, strongly sclerotized, fused with segment IX; each with apex directed ventromesad, narrow in lateral aspect, broader apically in dorsal and ventral aspect. Tergum X simple; median dorsal process (Figs. 2D, 2E m.d.p.) banana-shaped in lateral aspect, curved dorsad, long triangular with blunt apex in dorsal aspect, approximately 2/3 length of preanal appendages; ventrolateral processes absent. Inferior appendages, each with basal segment large, its posterior margin angulate about 1/3 from base in lateral aspect, with short blunt mesal projection in ventral aspect; distal segment with dorsolateral process smooth and triangular in lateral aspect, rectangular in ventral aspect; ventromesal process long and triangular in lateral aspect, finger-like in ventral aspect. Phallus thick, spoon-like in dorsal aspect, membranous apically. Female genitalia (Figs. 2 J–2K). Tergum X fused with preanal appendages, thumb-like in lateral aspect, each lobe triangular in dorsal aspect. Lamellae (Fig. 2J, 2L la) short rectangular in lateral aspect. Supragenital plate (Fig. 2L s.p.) trapezoidal, posterior margin slightly concave in middle. Gonopod plate broad, approximately 1.3 times as wide as length in ventral aspect; its apicomesal lobe trapezoidal in ventral aspect, with short round projection apically. Spermathecal sclerite approximately half length of gonopod plate; posterodorsal part strongly sclerotized, visible in ventral aspect (marked with an arrow in Fig. 2L). Final instar Larva (Figs. 1C, 3A). Length up to 7 mm. Head 0.71–0.82 mm wide (n = 10), mostly reddish brown, with transverse ridge at middle; primary seta 2 longest, approximately twice as long as seta 3; primary setae 14 and 15 located close together, both approximately 2/3 length of seta 2; seta 17 short, fine. Pronotum large, central part dome-shaped, flat laterally, each lateral margin thickened, with pair of short acute processes anterolaterally. In mesonotum, each mesal sclerite forming rounded square, with transverse ridge at posterior 1/4; each lateral sclerite with narrow anterior part and triangular posterior part, separated by ridge at middle; mesepisternum protruding anterad as long horn-like process in dorsal aspect. Metanotum with 3 pairs of sclerotized setal areas, with row of setae between sa 2. Abdominal gills present on following segments: dorsal and ventral gills on abdominal segment II (posterior) and on segments III to VII (anterior and posterior), occasionally dorsal gills on segment VIII (anterior); gills on segment II usually single but rarely forked; gills on segments III to VII single, two- or three-branched; gills on segment VIII single. Lateral fringe present on posterior part of segment III to segment VIII, forked lamellae present laterally on segments IV to VII. Chloride epithelia long oval, present on segments VI to VIII dorsally, on segments IV to VII ventrally. Anal claws each with one accessory hook dorsally. Pupa (3E–3H). Only pupal exuviae available for this study. Antennae approximately same length as body. Mandibles long triangular apically in dorsal aspect, without tooth. Labrum with five pairs of long, apically curved-setae near anterolaterally, with pair of short fine setae anteromesally. Tarsus of each midleg with sparse fringe of setae. Abdominal tergum I with pair of spined ridges; anterior hook plates present on terga III to VII, each with two to four spines; tergum V with pair of posterior hook plates, each with more than 20 spines. Lateral fringe present from posterior part of segment V to VIII. Abdominal gills present, single, two- or three-branched; arrangement unconfirmed because of damaged specimens. Anal process slender, with minute spines laterally; each apex curved dorsomesad, with tiny teeth. Case (3B–3D, 3I–3K). Case of final instar larva up to 7 mm long, constructed of small rock fragments, with three to five larger stones along each side; posterior closure slightly bulging above center, pocket-like, with dorsal slit visible only in posterodorsal view (Fig. 3D). In pupal case, anteroventral edge fastened with silk to substrate; anterior opening closed by small stone with silk; posterior end closed by silk, with 8 or more slits along ventral margin. Holotype. Male (in alcohol). Amami-Oshima: Wet cliff face, Yuwangama, Yamato-son, Kagoshima, 28.355°N, 129.417°E, alt. 100 m, larva collected on 15.iii.2019 by S. Kushibiki, emerged during the period 13–26.v.2019, reared by N. Shimura (CBM-ZI 0177556). Paratypes. 3 males, 4 females, same data as holotype (CBM-ZI 0177557–0177563); 3 males, same locality as holotype, larvae collected on 15.iii.2019, adults preserved on 15.v.2019, all by S. Kushibiki (CBM-ZI 0177564– 0177566). Other specimens examined. Amami-Oshima: 3 larvae, same locality as holotype, 29.iii.2014, N. Shimura (NS); 1 female with its larval and pupal exuviae, same locality as holotype, larva collected on 29.iii.2014, emerged on 30.v.2014, all by N. Shimura (TN); 1 male, same locality as holotype, 18–19.iv.2015, S. Inaba, light-pan trap (TN); 3 larvae, same locality as holotype, 18.iv.2015, S. Inaba (SI); 5 pupal exuviae, 7 pupal cases, same locality as holotype, larvae collected on 15.iii.2019 by S. Kushibiki, fixed on 13–26.v.2019 by N. Shimura (TN); 6 larvae possibly this species, madicolous habitat, near Kawauchi-gawa, Uken-son, Kagoshima, 20.iii.1999, T. Ito and A. Ohkawa (TN); 3 larvae, same locality, 25.x.2011, T. Ito (TN). Etymology. rupicola (rupes + cola), Latin noun, “inhabitant of cliff,” referring to the larval habitat. Distribution. Amami-Oshima. Japanese name. Iwa-ningyo-tobikera. Remarks. Dr. T. Ito provided us with several larval specimens collected from madicolous habitats in 1999 in Okinawa-Jima, the largest island in the Ryukyu Archipelago. Although these larvae and their cases are identical to those of G. rupicola sp. nov., we reserve the identification of the Okinawa-jima population until adult male specimens become available. A related species, indistinguishable from our new species by the larval stage, could be distributed in Okinawa-jima. For example, Goera akagiae and Goera uchina Tanida and Nozaki 2006 (in Nozaki & Tanida 2006) are distributed in Amami-Oshima and Okinawa-jima, respectively, but they cannot be separated from each other by larval morphology (Nozaki & Tanida 2006).Published as part of Nozaki, Takao & Shimura, Noriyoshi, 2020, A new species of the genus Goera Stephens (Trichoptera, Goeridae) found in madicolous habitats in Amami-Oshima, southwestern Japan, pp. 573-579 in Zootaxa 4732 (4) on pages 574-578, DOI: 10.11646/zootaxa.4732.4.6, http://zenodo.org/record/366738
FIGURE 3 in A new species of the genus Goera Stephens (Trichoptera, Goeridae) found in madicolous habitats in Amami-Oshima, southwestern Japan
No full textFIGURE 3. Final instar larva, pupa, and their cases of Goera rupicola sp. nov. 3A–3D, larva: 3A, head and thorax, dorsal, primary setae 2, 3, 14, 15, 17 numbered; 3B, case, dorsal; 3C, same, caudal; 3D, same, posterior part, posterodorsal. 3E–3K, pupa: 3E, labrum and mandibles, dorsal; 3F, segment X and anal processes, dorsal, apex of right anal process enlarged; 3G, tibia and tarsus of right midleg, mesal; 3H, spined ridge and hook plates (paired), dorsal; 3I, case, right lateral; 3J, anterior closure of case, posterior; 3K, posterior closure of case, caudal. Abbreviations: a = anterior; mes. = mesepisternum; p = posterior; I, III–VII = abdominal segments I, III–VII.Published as part of Nozaki, Takao & Shimura, Noriyoshi, 2020, A new species of the genus Goera Stephens (Trichoptera, Goeridae) found in madicolous habitats in Amami-Oshima, southwestern Japan, pp. 573-579 in Zootaxa 4732 (4) on page 577, DOI: 10.11646/zootaxa.4732.4.6, http://zenodo.org/record/366738
FIGURE 6 in Notes on six microcaddisfly species (Trichoptera: Hydroptilidae) recorded for Japan, one a newly described species
No full textFIGURE 6. Final instar larva and its case of Stactobia distinguenda Botosaneanu & Nozaki 1996. 6A–6M, larva: 6A, habitus, dorsal; 6B, head, left dorsolateral; 6C, head, ventral; 6D, left mandible, ventral; 6E, right antenna, right lateral; 6F, right halves of 3 thoracic nota, dorsal; 6G, 3 thoracic sterna, ventral; 6H, right foreleg and fore trochantin, right lateral; 6I, right foretarsal claw and basal seta, right lateral; 6J, right mesopleuron, right lateral; 6K, right metapleuron, right lateral; 6L, abdominal segments I–III, dorsal; 6M, abdominal segments VIII–X, left dorsolateral. 6N, 6O, case: 6N, dorsal; 6O, ventral. Scale bars for 6A and 6N = 1 mm.Published as part of Ito, Tomiko & Shimura, Noriyoshi, 2019, Zootaxa 4629 (1) on pages 26-38, DOI: 10.11646/zootaxa.4629.1.2, http://zenodo.org/record/326826
FIGURE 3 in The genus Anisocentropus McLachlan (Trichoptera, Calamoceratidae) in Japan
No full textFIGURE 3. Anisocentropus (A.) kawamurai larva. A, head, dorsal, primary setae numbered; B, same, ventral; C, same, right lateral (setae not illustrated); D, antenna, dorsal; E, left mandible, dorsal; F, labrum, dorsal; G, thorax, right half, dorsal; H, anterolateral edge of pronotum, ventral; I, right pleura and thoracic legs, dorsal; J, right thoracic legs, ventral; K, right foretibia, ventral.Published as part of Ito, Tomiko, Hayashi, Yumiko & Shimura, Noriyoshi, 2012, The genus Anisocentropus McLachlan (Trichoptera, Calamoceratidae) in Japan, pp. 1-17 in Zootaxa 3157 on page 5, DOI: 10.5281/zenodo.27967
Stactobia distinguenda Botosaneanu & Nozaki 1996
No full text<i>Stactobia distinguenda</i> Botosaneanu & Nozaki 1996 <p>(Fig. 6)</p> <p> <i>Stactobia distinguenda</i> Botosaneanu & Nozaki 1996, 60–62, male, habitat, Japan (Honshu); Ito 2017, 219–220, male, Japan (Hokkaido, Honshu).</p> <p> <b>Final instar larva</b> (Figs 6 A–6M). Moderately depressed (flattened dorsoventrally), length up to 1.8 mm, sclerotized parts dark brown, other parts creamy.</p> <p> <i>Head</i> (Figs 6 B–6E). Subquadrate, sutures indistinct, width up to 0.28 mm, ratio of length to width about 1.1. Antennae near anterolateral corners, each with long apical seta. Setae 9 longest, about 1.5 times head width. Labrum symmetrical. Mandibles robust, each with 4 blunt teeth, mesal brush indistinct.</p> <p> <i>Thorax</i> (Figs 6 F– 6I). Dorsum of each segment covered by pair of large square thoracic nota; small round concavity at basal 1/4 of mesal edge of mesonotum, pair of concavities appearing as tiny hole; number of setae on each side about 30 on pronotum (~18 anteriorly, ~12 across middle), about 25 on each of meso- and metanota (~16 anteriorly, ~8 across middle). Prosternum with pair of transversely long sclerites near posterior margin and pair of small round sclerites at posterolateral corners; transversely elongate sclerites gradually broadened laterally, each with small cleft in lateral margin. Mesosternum with pair of short wide sclerites near posterior margin, sometimes indistinct.</p> <p>Thoracic legs all robust, similar in length and form; basal seta of each tarsal claw slightly curved, subacute apically. Foretrochantin with subtriangular anterior and posterior halves. Pleura of meso- and metathoracic segments subrectangular, each slightly curved with small convexity at apical 1/3 of dorsal margin, pleural sutures indistinct.</p> <p> <i>Abdomen</i> (Figs 6 L–6M). Moderately depressed (flattened dorsoventrally), middle of abdomen swollen. Tracheal gills, humps, lateral fringes, or lateral tubercles absent. Subquadrate tergite and pair of setae on each of segments I–VII; tergites dark brown at anterior 2/3–3/4 and light brown at posterior 1/3–1/4; tergites of segments II–VII each with median small round area of chloride epithelia (dorsal ring of Marshall 1979; chloride epithelia? of Botosaneanu & Levanidova 1988); tergite VIII large, subquadrate with spinose posterior margin; tergite IX large, semicircular, posterior edge with regular ‘crenellations’ (modified flattened setae of Marshall 1979) or ‘crenels’ (Botosaneanu & Levanidova 1988) medially and spines laterally. On segment X, lateral sclerites rectangular; paired anal legs strongly curved anterolaterad, anal claws without any accessory hooks.</p> <p> <b>Case</b> (Figs 6N, 6O). Composed of ventral and dorsal valves; ventral valve forming almost flat sheet; dorsal valve forming convex dome carried tortoise-like, slightly larger than ventral valve; anterior and posterior hoods scarcely developed; made of silk together with few mineral particles especially at each end of dorsal valves.</p> <p> <b>Habitat and feeding</b>. Larvae and pupae were found in the hygropetric zone. Gut contents comprised somewhat amorphous particles. The gut contents together with the robust mandibles with blunt teeth (Fig. 6D) suggest the larvae are scrapers adapted to stony substrata.</p> <p> <b>Specimens examined</b>. <b>Japan, Kyushu: Nagasaki:</b> 3 males, 4 females, 2 pupae (male, female), 6 larvae, Sasebo-shi, Maehata-cho, 17.v.2017, N. Shimura; 4 larvae, same locality, 26.vii.2017, N. Shimura; 1 pupa (female), 24 larvae, same locality, 4.x.2017, N. Shimura.</p> <p> <b>Distribution</b>. Japan (Hokkaido, Honshu, Kyushu). New to Kyushu.</p> <p> <b>Remarks</b>. The larvae of the genus <i>Stactobia</i> are unique in the family Hydroptilidae in having a pair of transversely rectangular dorsal sclerites on each of segments I–VII and large dorsal sclerites on each of segments VIII and IX (Waringer & Graf 2011; Figs 6A, 6L, 6M). The larvae of this species are distinguished from other congeneric Japanese species by the arrangement of the ventral sclerites of the thoracic sterna: A pair of transversely wide, submesal, subtriangular sclerites posteriorly and a pair of small round ones at the posterolateral corners on the prosternum, and a pair of transversely wide, linear, submesal sclerites posteriorly on the mesosternum (Fig. 6G). The case is slightly depressed dorsoventrally, broader medially, with very small anterior and posterior hoods, and made of silk with a few minerals dorsally (Figs 6N, 6O). These character states of cases are common to those of Japanese species of the <i>S. nielseni</i> Species Group: <i>S. chichibu</i> Ito 2017, <i>S. campire</i> Ito 2017, and <i>S. urauchi</i> Ito 2017 (Ito 2017).</p>Published as part of <i>Ito, Tomiko & Shimura, Noriyoshi, 2019, Notes on six microcaddisfly species (Trichoptera: Hydroptilidae) recorded for Japan, one a newly described species, pp. 26-38 in Zootaxa 4629 (1)</i> on pages 26-38, DOI: 10.11646/zootaxa.4629.1.2, <a href="http://zenodo.org/record/3268263">http://zenodo.org/record/3268263</a>
Hydroptila parapiculata Yang & Xue 1994
No full text<i>Hydroptila parapiculata</i> Yang & Xue 1994 <p>(Fig. 4)</p> <p> <i>Hydroptila parapiculata</i> Yang & Xue 1994, 9, male, central and southeastern China; Yang <i>et al</i>. 2005, 458; Kobayashi <i>et al</i>. 2017, 19, central Japan.</p> <p> <b>Revised description. Male</b>. Wings brown, light brown patterns on forewings often indistinct in alcohol; light brown dots absent in hind wings. Forewings each 2.0 mm long, hind wings each 1.7 mm long (n = 1). Antennae brown, each 1.2 mm long, 30-segmented (n = 1). Short ventromesal process on abdominal segment VII.</p> <p>Genitalia (Figs 4 A–4D). Segment IX with strongly produced anterolateral margins, reaching up to middle of abdominal segment VII, small rounded mid-dorsal process (d.pr.) on posterior margin. Dorsal plate (d.pl.) mostly membranous, elongate with large, subcircular concavity apicomesally in dorsal view. Subgenital plate (s.pl.) broadly triangular in ventral view. Inferior appendages (i.a.) elongate-triangular, apices curved laterodorsad. Aedeagus slender and slightly curved ventrad apically with titillator at basal 2/5, subapical process absent.</p> <p> <b>Female</b>. Unknown.</p> <p> <b>Specimens examined</b>. <b>Japan, Honshu, Kyoto</b>: 1 male, Uji-shi, Makishima-cho, Uji-gawa, Ingen-bashi, 24.vi.2012, S. Kobayashi. <b>Shiga</b>: 1 male, Otsu-shi, Oishi-higashi, Seta-gawa, Shishitobi-bashi, 16.vii.2014, S. Kobayashi.</p> <p> <b>Distribution</b>. China (Anhui, Fujian, Sichuan), Japan (Honshu).</p> <p> <b>Remarks</b>. The male of this species is somewhat similar to that of the widely distributed Japanese species, <i>H. oguranis</i>, in having a broadly triangular subgenital plate and almost straight phallic apparatus, but differs from the latter as follows: The dorsal plate has a large round excavation apically in <i>H</i>. <i>parapiculata</i>, but a shallow excavation apically in <i>H</i>. <i>oguranis</i>; the phallic apparatus is slender and simple apically in <i>H</i>. <i>parapiculata</i>, but bifurcate apically in <i>H</i>. <i>oguranis</i>.</p> <p> <b>Japanese name</b>. Nise-ogura-hime-tobikera.</p>Published as part of <i>Ito, Tomiko & Shimura, Noriyoshi, 2019, Notes on six microcaddisfly species (Trichoptera: Hydroptilidae) recorded for Japan, one a newly described species, pp. 26-38 in Zootaxa 4629 (1)</i> on pages 26-38, DOI: 10.11646/zootaxa.4629.1.2, <a href="http://zenodo.org/record/3268263">http://zenodo.org/record/3268263</a>
Hydroptila dorsoprocessuata Botosaneanu 1993
No full text<i>Hydroptila dorsoprocessuata</i> Botosaneanu 1993 <p>(Fig. 2)</p> <p> <i>Hydroptila dorsoprocessuata</i> Botosaneanu 1993, male, 187–188, Russia (South Siberia); Arefina <i>et al</i>. 1997, 44, 45, male, Russia (South Primorye); Ivanov 2011, 195.</p> <p> <b>Revised description. Adult</b>. Wings brown, some light brown patterns present in forewings, but often indistinct in alcohol; light brown dots absent in hind wings. Wing length: males (n = 5), forewings each 2.4–2.7 mm, hind wings each 2.0– 2.4 mm; females (n = 5) forewings each 2.6–2.9 mm, hind wings each 2.4–2.7 mm. Antennae brown with light bands at middle and apices; in male (n = 5), each 1.3–1.5 mm long, 34–36-segmented; in female (n = 5), each 0.8–1.0 mm long, 24–25-segmented. Short ventromesal process on abdominal segment VII in male and on VI in female.</p> <p> <b>Male</b> (Figs 2 A–2D). Segment IX short with well-produced anterior margin, long mid-dorsal process (d.pr.) on posterodorsal margin and pair of membranous ventrolateral processes (l.p.) on posterior margin, ventrolateral process distinct in ventral view but often indistinct in lateral view. Dorsal plate (d.pl.) long, subrectangular, with shallow apical cleft in dorsal view, mostly membranous with sclerotized lateral margins. Subgenital plate (s.pl.) broadly triangular in ventral view. Inferior appendages (i.a.) slender at basal 1/3 and expanded at apical 2/3, in lateral view with rounded, setose apical margins; in ventral view elongate-triangular. Phallic apparatus with constriction at 1/3 length, titillator absent, aedeagus (ae.) and subapical process (sub.pr.) directed caudad.</p> <p> <b>Female</b> (Figs 2 E–2H). Segment VIII with anterolateral margin slightly produced in lateral view, posterior margin with 3–4 twisted marginal setae; its internal sclerite large pentagonal with well sclerotized anterior and posterior bands. Bursa copulatrix narrow, ovate.</p> <p> <b>Specimens examined.</b> <b>Japan, Honshu: Aichi</b>: 5 males, 5 females, Shinshiro-shi, Toyooka, Ichinose, Ôtsutani-gawa, near river mouth, 13.vi.2015, H. Nishimoto, light trap. <b>Mie</b>: 1 male, Kameyama-shi, Washiyama, 29– 30.ix.2006, N. Kawase, light pan trap (deposited in the Minakuchi Kodomo-no-kuni Nature Museum, Shiga, No. MITR 20090076).</p> <p> <b>Distribution</b>. Russia (South Siberia, continental part of Far East), Japan (Honshu). New to Japan.</p> <p> <b>Remarks</b>. The male of this species is somewhat similar to that of <i>Hydroptila oguranis</i> Kobayashi 1974, distributed in Japan, in having large dorsal plate and expanded apical parts of inferior appendages, but distinctly distinguishable from the latter by the long dorsal process (d.pr.) of segment IX.</p> <p>Male specimens in Japan (Figs 2 A–2D) differ slightly from those in Siberia (Botosaneanu, 1993) in having a pair of membranous lateral processes (l.p.) on the posteroventral margins of segment IX. However, we recognize this to be either minor intraspecific variation or, since the processes on the Japanese specimens are often small and difficult to see due to transparency, simply structures omitted from the original description. The females are described here for the first time. The adults of this species were collected near fast-flowing rivers with stony substrates.</p> <p> <b>Japanese name</b>. Senaga-hime-tobikera (newly given here).</p>Published as part of <i>Ito, Tomiko & Shimura, Noriyoshi, 2019, Notes on six microcaddisfly species (Trichoptera: Hydroptilidae) recorded for Japan, one a newly described species, pp. 26-38 in Zootaxa 4629 (1)</i> on pages 26-38, DOI: 10.11646/zootaxa.4629.1.2, <a href="http://zenodo.org/record/3268263">http://zenodo.org/record/3268263</a>
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