Pseudostenophylax kuharai, Nozaki, Takao, 2013

Nozaki, Takao, 2013, The genus Pseudostenophylax Martynov (Trichoptera, Limnephilidae) in Japan, Zootaxa 3666 (4), pp. 559-578 : 570-571

Pseudostenophylax kuharai sp. nov.

( Figs. 6 , 10 )

Pseudostenophylax sp.: Ito and Kubo 2011, 9.

Pseudostenophylax sp. 2: Kuhara 2011, 53, 74–75

Diagnosis. This species belongs to the P. ondakensis Species Group (Schmid 1991). Both adults and larvae are very similar to those of P. itoae sp. nov., but they are distinguishable from the latter by the following characters. In male genitalia of this species, both intermediate appendages and the dorsal darkly pigmented areas are rounded triangles in dorsal aspect, but intermediate appendages are rectangular and the symmetrical dorsal darkly pigmented areas are normal and reverse L-shaped in P. itoae . In the larva of this species, the lengths of primary setae 5 each are more than 1.5 times as long as the distance between the bases of setae 5, but about 1.2 times as long in P. itoae .

Adult. General appearance similar to P. tochigiensis . Forewings 12–17 mm in male, 9–13 mm in female.

Male genitalia. Tergum VIII slightly higher than long in lateral aspect; posterodorsal sclerotized area densely covered by short spine-like setae, rounded square in dorsal aspect, with central shallow depression on posterior half. Segment IX in lateral aspect short dorsally, concave posteriorly and swelling posterolaterally at midheight. Superior appendages ear-like in lateral aspect. Intermediate appendages rounded triangular in dorsal aspect, Vshaped in caudal aspect; dark pigmented area rounded triangular in dorsal aspect, covered with minute denticles. Lateral sclerites of segment X largely fused with intermediate appendages. Inferior appendages each onesegmented, triangular in lateral aspect, trapezoidal in ventral aspect, but posterior margin variable. Aedeagus similar to that of P. dentilus . Parameres large, membranous basally, sclererotized apically; each having sclerotized part hammer-shaped, covered with minute denticles; mesal part broad, with several long spines apicomesally; outer projection with slightly broader apex, occasionally bent ventrad.

Female genitalia. Very similar to those of P. dentilus .

Larva. Larva up to 20 mm long. Head mostly reddish brown, but posterior corner of frontoclypeal apotome usually pale brown; round in dorsal aspect; primary setae 5 long, each about 1.5 to 1.9 times as long as distance between bases of setae 5; setae 6 transparent, short, each less than 2/5 of seta 5; setae 14 longest; ventral setae 18 minute. Ventral apotome, labrum and mandibles similar to those of P. ondakensis . Prosternal horn long. Pronotal sclerites yellowish brown, with long pigmented and shorter semitransparent setae, anterior edge with transparent hair-like setae. Mesonotal sclerites yellowish brown. Metanotal sclerites yellowish brown, with 7–15 setae between sa 2 sclerites. Hind femora each bearing 5–7 setae along ventral edge, with 4–9 setae laterally. Abdominal segment I with 60–90 setae dorsally, with more than 100 setae ventrally. Abdominal gills single, usually present on following segments: Dorsal gills on abdominal segments II to V (anterior and posterior) and on VI to VII (anterior); lateral gills on II to III (anterior and posterior) and IV (anterior); ventral gills on II to VII (anterior and posterior); but arrangement of gills often variable on dorsum of VI and VII, and laterally on II and IV. Lateral fringe present on posterior part of abdominal segment II to VIII. Forked lamellae present on abdominal segments III to VIII. Ventral chloride epithelia present on abdominal segments II to VII. Anal claws each with one accessory hook.

Case. Both larval and pupal cases similar to those of P. tochigiensis .

Holotype. Male (pinned), spring stream beside Peregari-sanso, Sizunai-cho [now Shinhidaka-cho], Hokkaido, 42º29’ N, 142º49’ E, 400 m a.s.l., larva collected on 23.vii.1995, adult emerged 15.ix.1995 by N. Kuhara (CBM- 146873).

Paratypes. Same data as the holotype except for emergence date of vi.1996, 1 male (pinned) (NMNH); same data as the holotype except for emergence date of ix.1996, 1 male (in alcohol) (TN).

Other specimens examined. Hokkaido: Satsunai-dam, Nakasatsunai-mura, 16.vi.1998 (light), M. Ishizuka, 1 male (TN); Kamisatsunai-bashi, Nakasatsunai-mura, 22.vii.2003, Hokkaisuiko, 1 male (TN); small stream, 380 m a.s.l., Futamata, Kamitoyoni, Hiroo-cho, 9.v.2010, T. Ito, 2 larvae (NMNH); ibid., 19.vi.2010, T. Ito, 5 males (TN); spring stream, near Hodaka-bashi, Shimukappu-mura, 29.iv. –5.v.2009 (Malaise trap), N. Kuhara, 14 males, 1 female (TN); small stream, Akaiwa, Shimukappu-mura, 5–15.v.2009 (Malaise trap), N. Kuhara, 6 males (TN); small stream, Kanayama-toge, Shimukappu-mura, 5–15.v.2009 (Malaise trap), N. Kuhara, 2 males (TN); Chubetsu-dake, 1,650 m a.s.l., Taisetsu-zan, 28.vii–3.viii.1975, M. Suwa et al., 1 male (TN); same locality as holotype, larvae collected on 23.vii.1995, fixed during vi–xi.1996 by N. Kuhara, 2 males, 9 larvae (TN); ibid., larvae collected on 23.vii.1995, adults emerged vii.1996 by N. Kuhara, 2 females (1 female CBM; 1 female TN); Yubari-dake, 26.vii.1977, T. Hattori, 1 male (TN); Poroshiri-dake, Hidaka Ms., 24.vi.1975, T. Hattori, 1 larva (TN); Yufure-zawa, Ashibetsu-dake, 3.vii.1976, T. Hattori, 4 larvae (TN); R. Penkemoyuuparo, 650 m a.s.l., Yubari-shi, Hokkaido, 4.vii.1991, N. Kuhara, 2 males (TN); Ikutora-toge, 650 m a.s.l., Minamifurano-cho, 23.v–9.vi.2009 (Malaise trap), N. Kuhara, 30 males, 7 females (TN); small stream, Karikachi-toge, 5–15.v.2009 (Malaise trap), N. Kuhara, 1 male (TN); Shizunai, Shinhidaka-cho, 6.vi.1992, T. Ito, 1 male (TN); small stream near Hidaka tunnel, Hidaka-cho, 5.v.1996, N. Kuhara, 1 male (TN); tributary of Rokuno-sawa, Pankenushi-gawa, Hidaka-cho, 8.viii.2008, N. Kuhara, 1 male (TN); Niikappu-dam, 400–600 m a.s.l., Niikappu-cho, 4.xi.1982, T. Ito, 7 larvae (TN); small stream near Iwashimizu-hendensho, Niikappu-cho, 8.ix.1995, T. Kishimoto, 1 larva (TN); spring, Izumi, Niikappu-cho, 19–25.iv.2009 (Malaise trap), N. Kuhara, 3 males (TN); Nissho-toge, head water of Sarugawa, Hidaka-cho, 25.viii–5.ix.2009 (Malaise trap), N. Kuhara, 12 males, 6 females (TN); small stream, Meguro, Erimo-cho, 11–25.iv.2010 (Malaise trap), N. Kuhara, 7 males, 1 female (TN).

Etymology. This species is dedicated to Dr. Naotoshi Kuhara, Chitose Board of Education, who gifted me many valuable specimens, including this species.

Distribution. Japan (Hokkaido).

Biology. Larvae were collected from small mountain streams. Adults were collected from early summer to autumn (Kuhara 2011).

Japanese name. Kuhara-miyama-tobikera.

Figures

FIGURE 10. Distributions of Japanese Pseudostenophylax species.

FIGURES 6 – 7. 6, Male and larva of Pseudostenophylax kuharai. A – E, male genitalia: A, left lateral; B, dorsal; C, ventral; D, caudal; E, phallus, dorsal. F, larval head, pro-, meso- and metanota, dorsal. 7, Male and larva of P. itoae. A – F, male genitalia: A, left lateral; B, dorsal; C, ventral; D, caudal; E, phallus, dorsal; F, apex of left paramere, variation, dorsal. G, l arv al head, dorsal.