Epeorus (Belovius) latifolium Ueno 1928
Year: 2025
Type: other
Abstract: Epeorus (Belovius) latifolium Uéno, 1928 (Figs 5–9) [Japanese name "Erumon-hirata-kagerou"] Epeorus latifolium: Uéno 1928: p. 34, pl. 7, figs 6, 6a–6o (nymph) [JAPAN: Hokkaido]; Uéno 1931b: p. 192, fig. 2 (male imago) [JAPAN: "middle Japan " i.e. adjacent region of Nagano Prefecture]; Uéno & Okamoto 1932: p. 1959, fig. 3859 (male imago) [JAPAN]; Imanishi 1934: p. 389 (nymph, imago) [JAPAN: Kyoto]; Imanishi 1940: p. 248, fig. 36 (nymph) [KOREA, Northeast CHINA]; Tshernova 1949: p. 146, figs 6, 7 (nymph) [RUSSIA: Altai]; Uéno 1950: p. 123, fig. 306 (male imago, female imago) [JAPAN]; Tshernova 1952: p. 251 (nymph) [RUSSIA]; Uéno 1959: p. 55 (nymph) [JAPAN]; Gose 1962: p. 20, fig. 1-11-4 (nymph) [JAPAN]; Gose 1979: p. 44, figs 12, 16 (nymph, male imago) [JAPAN]; Braasch 1979: p. 243, figs 2, 4, 7, 9, 11, 14d–f, 15, 16 (nymph) [JAPAN]; Okazaki 1984: p. 20, fig. 10 (egg) [JAPAN]; Gose 1985: p. 16, figs 37, 38 (nymph) [JAPAN]; Kobayashi 1988: p. 297, figs 4, 5 (nymph) [JAPAN]; Ishiwata & Inada 1996: p. 41, fig. 8 (nymph) [JAPAN]; Ishiwata 2002, p. 22, figs 178, 179, (nymph, male imago) [JAPAN: Kanagawa]; Quan et al. 2002, p. 253 (nymph) [Northeast CHINA]; Ishiwata & Takemon 2005b: p. 105, figs 45-9, 47-9 (male imago, nymph) [JAPAN]; Maruyama 2016: p. 172, figs 1-171f, 1-177, 1-271, 1-272, 1-273, 1-274 (male imago, female imago, male subimago, female subimago) [JAPAN: Hyogo]; Ishiwata et al. 2018: p. 126, figs 45-9, 47-9 (male imago, nymph) [JAPAN]; Ishiwata & Fujitani 2018: p. 33, pl. 22, fig. 3 (egg) [JAPAN]. Epeorus (Epeorus) latifolium: Byong & Bae 1984: p. 5, pl. 2, figs a–f, pl. 15, fig. b (male imago, female imago, male subimago, female subimago, nymph) [KOREA]. Epeorus (Belovius) latifolium: Tshernova 1981: p. 329, fig. 9 (male imago) [JAPAN] Iron uenoi Matsumura, 1933: p. 98, pl. 21, fig. 16 (male imago) [JAPAN: Hokkaido]. SYN. NOV. Epeorus uenoi: Ishiwata et al. 2018: p. 126, fig.13 (male imago) [JAPAN]; Ishiwata & Fujitani 2018: p. 33, pl. 22, figs 7, 8 (egg) [JAPAN]. SYN. NOV. Materials examined. Type specimens: We investigated the Aquatic Insects Collection at The Kyoto University Museum in 2019 but were unable to find the holotype of E. latifolium. Ishiwata (2018) also noted that the types and other materials collected by Uéno were missing. Syntypes of Iron uenoi Matsumura, 1933 (identification label by Imanishi, 1933, " Iron uenoi Imanishi, Det. K. Imanishi 1933 ". All dried specimens.): 3 male imagines, "Maruyama [in Kanji 円山], 5/27" (collection years not listed), one with other labels (Fig. 32): "Type Matsumura" (red label) and " Epeorus uenoi Matsumura. Det. by S. Ishiwata, 1992" (identification label by Shin-ichi Ishiwata, 1992); 2 male imagines, "Sahoro [in Katakana サホロ, probably meaning Sapporo], 5/27" (collection years not listed); 1 male imago, "Sahoro [in Katakana サホロ, meaning Sapporo], 5/26" (collection years not listed); 1 male imago, "Sapporo, Matsumura; 2/ VI '08" (with collection date June 2nd, 1908); 1 male imago, "Maruyama [in Kanji 円山], 6/7" (collection years not listed). Other specimens: JAPAN, HOKKAIDO, ISHIKARI: [1.] Sapporo-shi, Minami-ku, Jozankei, Toyohira-gawa Riv., mainstream, 678 m a.s.l. (42°47'57.0"N, 141°10'14.3"E), 5 mature male nymphs and 1 mature female nymph, 15.VIII.2003, K. Saito; ditto, 1 mature female nymph, 18.X.2003, K. Saito; [2.] Sapporo-shi, Minami-ku, Jozankei, Izarisawa-gawa Stream (a tributary of Toyohira-gawa Riv.), 568 m a.s.l. (42°51'18.4"N, 141°10'34.0"E), 2 mature male nymphs and 1 mature female nymph, 14. VI.2007, K. Saito; ditto, 3 mature male nymphs and 5 mature female nymphs, 11.IX.2007, K. Saito; [3.] Sapporo-shi, Minami-ku, Jozankei, Toyohira-gawa Riv., upstream of confluence of mainstream and Ekiteisawa-gawa Stream, 514 m a.s.l. (42°51'18.1"N, 141°08'59.0"E), 1 mature male nymph and 1 mature female nymph, 12.VI.2003, K. Saito; [4.] Sapporo-shi, Minami-ku, Jozankei, Usubetsu-gawa Stream (a tributary of Toyohira-gawa Riv.), 472 m a.s.l. (42°54'33.5"N, 141°07'28.9"E), 1 mature female nymph, 11.V.2002, K. Saito; ditto, 1 mature female nymph, 08.IX.2002, K. Saito; ditto, 1 mature male nymph, 06.VII.2003, K. Saito; [5.] Sapporo-shi, Minami-ku, Jozankei, Shirai-gawa Stream (a tributary of Toyohira-gawa Riv.), the confluence of Shirai-gawa Stream and Migimata-gawa Stream, 450 m a.s.l. (42°59'39.6"N, 141°04'42.9"E), 3 mature male nymphs and 3 mature female nymphs, 6.VI.2004, K. Saito; [6.] Sapporo-shi, Minami-ku, Jozankei, Otarunai-gawa Stream (a tributary of Toyohira-gawa Riv.), 502 m a.s.l. (43°04'22.4"N, 141°06'34.8"E), four mature male nymphs and 2 mature female nymphs, 11.V.2002, K. Saito; ditto, 4 mature male nymphs and 6 mature female nymphs, 6.VII.2002, K. Saito; ditto, 1 mature male nymph and 2 mature female nymphs, 7.iv.2019, T. Takayanagi; ditto, 3 mature female nymphs, 21.IX.2019, T. Takayanagi; [7.] Sapporo-shi, Minami-ku, Jozankei, Otarunai-gawa Stream (a tributary of Toyohira-gawa Riv.), 394 m a.s.l. (43°01'56.1"N, 141°07'42.9"E), 1 mature male nymph, 18.VI.2007, K. Saito; [8.] Sapporo-shi, Minami-ku, Jozankei, Shirai-gawa Stream (a tributary of Toyohira-gawa Riv.), 300 m a.s.l. (42°58'37.7"N, 141°08'16.4"E), 1 mature male nymph, 14.VI.2005, K. Saito; ditto, 1 mature female nymph, 13.VIII.2005, K. Saito; ditto, 1 mature male nymph, 07.IV.2019, T. Takayanagi; [9.] Sapporo-shi, Minami-ku, Jozankei, Usubetsu-gawa Stream (a tributary of Toyohira-gawa Riv.), 353 m a.s.l. (42°56'29.4"N, 141°07'47.3"E), 2 mature male nymphs, 07.IV.2019, T. Takayanagi; [10.] Sapporo-shi, Minami-ku, Toyama, Kannonzawa-gawa Stream (a tributary of Toyohira-gawa Riv.), 267 m a.s.l. (42°58'31.0"N, 141°15'30.0"E), 2 male imagines, 2 female imagines, 1 mature female nymph and 1 immature nymph, 29.V.2018, T. Takayanagi; ditto, 1 mature male nymph and 1 immature nymph, 04.XI.2018, T. Takayanagi; ditto, 1 mature female nymph, 19.III.2019, T. Takayanagi; ditto, 5 male imagines and 4 female imagines, 23. V.2019, T. Takayanagi; ditto, 1 mature female nymph, 16.XII.2019, T. Takayanagi; ditto, 1 mature male nymph, 10. V.2020, T. Takayanagi; ditto, 5 male imagines, 29.V.2020, T. Takayanagi; [11.] Sapporo-shi, Minami-ku, Toyotaki, Toyohira-gawa Riv., mainstream, 188 m a.s.l. (42°57'38.4"N, 141°13'50.9"E), 2 mature male nymphs, 21.V.2020, T. Takayanagi; [12.] Sapporo-shi, Minami-ku, Makomanai, Toyohira-gawa Riv., mainstream, 82 m a.s.l. (42°59'02.5"N, 141°20'23.5"E), 4 mature female nymphs, 12.IV.2019, T. Takayanagi; [18.] Sapporo-shi, Nishi-ku, Heiwa, Kotonihassamu-gawa Stream (a tributary of Shin-kawa Riv.), 312 m a.s.l. (43°03'25.3"N, 141°12'40.6"E), 1 mature male nymph, 03.V.2020, T. Takayanagi; [19.] Chitose-shi, Shikotsuko-onsen, Shirisetsunai-gawa Stream (an inlet stream of Lake Shikotsu-ko), 289 m a.s.l. (42°46'39.0"N, 141°24'05.8"E), 1 mature male nymph, 2 mature female nymphs and 1 immature nymph, 23.V.2019, T. Takayanagi; ditto, 7 mature female nymphs, 21.IX.2019, T. Takayanagi; ditto, 2 mature male nymphs and 3 mature female nymphs, 09.IX.2020, T. Takayanagi; ditto, 2 mature male nymphs and 2 mature female nymphs, 01. VI.2021, T. Takayanagi; ditto, 1 mature male nymph and 1 mature female nymph, 15.VIII.2021, T. Takayanagi; [20.] Chitose-shi, Bifue, Bifue-gawa Stream (an inlet stream of Lake Shikotsu-ko), 257 m a.s.l. (42°43'47.9"N, 141°15'18.2"E), 2 mature male nymphs, 07.IV.2019, T. Takayanagi; ditto, 1 mature female nymph, 23. V.2019, T. Takayanagi; [23.] Eniwa-shi, Banjiri, Rarumanai-gawa Stream (a tributary of Chitose-gawa Riv.), 305 m a.s.l. (42°51'56.1"N, 141°20'31.5"E), 1 mature male nymph, 07.IV.2019, T. Takayanagi. Nymph (mature, in ethanol), redescription (Figs 5–7, based on specimens collected from type locality [19.]). Body length 10.0– 14.5 mm (male), 10.0– 15.5 mm (female). Cercus length ca. body length x 1.2. Head. Shape ellipsoid. Color yellowish-brown to reddish-brown with pale markings. Compound eyes dark gray to black. Ocelli dark gray. Antennae brown. Anterior margin densely covered with hair-like setae extending to lateral margins. Dorsal surface of head covered with fine hair-like setae. Sparse longer fine hair-like setae located posteriorly to the eyes (Figs 6a, b). Labrum: anterior and lateral margins evenly convex, anterior margin concave medially. Ventral surface with long antero-lateral bristles, row of short setae and brush of median fine hair-like setae on each side. Dorsal surface medially with four long adjacent bristles and two long bristles near each side of antero-lateral margin, and scattered variable-length setae (Fig. 7a). Mandibles: each outer incisor with three apical teeth and serrated margins, inner incisor with two apical teeth (right mandible) or four apical teeth (left mandible) and both inner incisors sharply serrated, right inner incisor slender and almost straight. Tuft of long setae on the base of inner incisor of right mandible, tuft of long setae and one brachy-pulmose seta on the base of inner incisor of left mandible (Figs 7b, c). Maxillae: one long, feather-like seta at base of apical tooth complex, some specimens with two setae on right maxilla (Fig. 28a). Hypopharynx: superlinguae distally widened, lingua shape subquadrate. Labium: labial palps two segmented, outer margin of proximal segment with sparse, thick setae. Distal segment with sparse, hair-like setae on outer margin and dense, brush-like setae on distal 1/3 area. Glossae and paraglossae with long, dense setae. Thorax. Yellowish-brown to reddish-brown with pale markings dorsally (Figs 5a, d). Ventrally white (Figs 5b, e). Pronotum roundly projecting laterally (Fig. 29a). Long hair-like setae on medial line to posterior margin of pronotum. Long hair-like setae on medial line to posterior area of mesonotum. Legs. Each anterior face of femur with dark brown transverse markings on its proximal, medial, and distal parts and hypodermal black spots on its base and middle (Fig. 6c). Dorsal edge of femur with dense long blade-like setae, ventral edge with sparse sho
Authors: Takayanagi, Tatsushi, Yoshizawa, Kazunori
Institution: Hokkaido University
Language: English
Subfield: Ocean Engineering
Field: Engineering
Domain: Physical Sciences
Open Access status: green
OpenAlex ID: W6893178470
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