Saprinus niponicus Dahlgren, 1962: 245 [Japan: Nagano (holotype and a paratype); Hachinohe; Aomori; Kiso-fukushima; Hirayu; Gifu; Hiogo; Nagasaki]; Mazur, 1970: 52; 1984: 55; Kryzhanovskij and Reichardt, 1976: 158; Hisamatsu, 1985: 223.

Japanese name: Nise-dôgane-emma-mushi.

Saprinus (Saprinus) niponicus: Ôhara, 1994, 229.

Saprinus niponicus Dahlgren, 1962, 245; Mazur, 1970, 57 [Korea]; Ohara, 1994, 229ESK & KSAE, 1994, 136 [Korea].

Saprinus (Saprinus) niponicus: Ohara, 1994, 229

Description. Body length, PPL, male, 4.05 - 5.71 mm (4.92 ± 0.09, n=20), female, 4.52 - 6.66 mm (5.89 ± 0.12, n=20), PEL, male, 3.33 - 4.81 mm (4.33 ± 0.08, n=20), female, 3.90 - 5.33 mm (4.82 ± 0.07, n=20). Width, male, 3.00 - 4.24 mm (3.80 ± 0.07, n=20), female, 3.38 - 4.71 mm (4.28 ± 0.07, n=20). Biometric data are given in Table 45. Body broadly oval and strongly convex. Cuticle very strongly shining with brassy lustre and black; tarsi and funicle of antennae dark rufopiceous.

Frontal stria of head weakly carinate, complete, sometimes interrupted medially. Supraorbital stria well impressed and complete. Disk of front sparsely covered with moderate punctures, the punctures much sparser on basal half; interspace among these punctures smooth or nearly so. Epistoma more densely punctate than on anterior area of front. Labrum deeply depressed medially.

Pronotal sides (Fig. 132) evenly arcuate and convergent on basal five-sixths, thence strongly convergent to apices. Apical angles obtuse. Marginal stria lightly carinate and complete. Disk smooth, but densely, coarsely and deeply punctate along the sides except on basal fourth, sparsely clothed with fine punctures in a narrow band outside the coarsely punctate area; base with one or two irregular rows of large punctures, the rows absent on lateral sixth and sparse on median third; elsewhere extremely finely, sparsely punctate; area behind eyes feebly depressed.

Epipleura of elytra even; surface between elytral and epipleural marginal striae with two rows consisting of moderate and sparse punctures; area inside elytral marginal stria sparsely and moderately punctate, the punctures being denser on apical third. Marginal epipleural stria complete and distinctly carinate. Marginal elytral stria strongly carinate, area inside it being crenate with coarse punctures; its apical end extending along the posterior margin of elytra to medio-apical angles of elytra and then a little extending basally. External subhumeral stria confined basally. Internal subhumeral stria present on median third, but frequently abbreviated basally and sometimes absent. Oblique humeral stria distinctly impressed on basal third. First to 4th dorsal striae densely crenate with coarse punctures, deeply impressed, and present on basal two-thirds. Fifth dorsal stria absent. Sutural stria shortly represented medially by a row of about four to eight coarse punctures. Surface of apical third of elytra covered with coarse, oval punctures, which are finer than those on the longitudinal area along the pronotal sides, and separated by their own diameter to twice the diameter, the punctured area usually expanded basally to nearly sutural area; interval between 1st and 2nd dorsal striae usually with several longitudinal and short lines; surface of basal two-thirds smooth, sparsely clothed with microscopic punctures; extreme apex of elytra (around apical stria) sparsely and finely punctate; interspace among all discal punctures smooth, occasionally clothed with microscopic punctures.

Propygidium densely covered with coarse punctures, which are as coarse as those of the apical third of the elytra but somewhat shallower, and become finer on the basal third; interspace among punctures occasionally and finely punctate, and with lightly impressed, fine and irregularly alutaceous microsculptures. Pygidium (Fig. 132) densely covered with punctures, which are a little coarser than the propygidial ones and progressively become finer apically.

Anterior margin of median portion of prosternum straight. Ventral disk of keel even, sparsely clothed with microscopic punctures, which are coarser laterally. Anterior marginal stria of keel deeply impressed, carinate and complete. Carinal striae carinate, complete, divergent anteriorly and posteriorly, and nearly straight on apical third. Descending lateral stria strongly carinate, its apical end attaining to apical third of carinal stria.

Anterior margin of mesosternum broadly and feebly emarginate medially. Marginal stria complete and strongly carinate. Disk sparsely clothed with coarse punctures, sometimes the punctures sparser and finer medially. Meso-metasternal suture lightly impressed, with a strongly crenate line. Intercoxal disk of metasternum feebly convex, smooth, but with coarse and dense punctures along the lateral stria, and with coarse and dense punctures in a transverse apical band. Lateral metasternal stria strongly carinate, extending obliquely and posteriorly, and usually present on basal half. Lateral metasternal disk densely covered with round, shallow, large and setiferous punctures, which become smaller on the apical third, with fine punctures intermingled. Metepisternum more densely punctate than those of lateral disk of metasternum, the punctures becoming sparser on apical half.

Intercoxal disk of 1st abdominal sternum with strongly carinate lateral stria on basal two-thirds; sparsely clothed with fine punctures on medio-apical area except for a narrow band along posterior margin with a row of coarse punctures; elsewhere densely and coarsely punctate.

Protibia with 13 spines on outer margin, the apical two and basal three small.

Table 45. Biometeric data of Saprinus niponicus Dahlgren.

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Male Female

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APW 1.09-1.52 (1.35±0.02) 20 1.24-1.67 (1.49±0.02) 20

PPW 2.76-3.95 (3.51±0.07) 20 2.95-4.33 (3.88±0.07) 20

PL 1.29-2.00 (1.64±0.04) 20 1.33-2.14 (1.83±0.04) 20

EL 2.00-2.86 (2.60±0.05) 20 2.38-3.05 (2.87±0.04) 20

EW 3.00-4.24 (3.80±0.07) 20 3.38-4.71 (4.28±0.07) 20

ProW 1.81-2.67 (2.34±0.05) 20 2.00-3.09 (2.58±0.05) 20

ProL 0.33-0.52 (0.45±0.01) 20 0.43-0.62 (0.48±0.01) 20

PyL 1.43-1.90 (1.68±0.03) 20 1.43-2.33 (2.09±0.04) 20

PTL 1.09-1.48 (1.35±0.02) 20 1.00-1.67 (1.45±0.03) 20

MSTL 1.24-1.57 (1.42±0.02) 20 1.05-1.71 (1.50±0.03) 20

MTTL 1.33-1.90 (1.67±0.03) 20 1.14-1.95 (1.79±0.04) 20

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Male genitalia as shown in Fig. 134.

Remarks. Saprinus niponicus resembles S. planiusculus; however, the long 3rd dorsal elytral stria and the shape of the 8th sternum of the male genitalia of S. niponicus will distinguish it from S. planiusculus.

This species is cadavericolous.

MO-02-048: SK-02-MO-001A

[Hokkaidô] 3 exs., Futatsu-yama, Shibecha, Kushiro, 1/viii/1954, 17/vi/1972, 15/viii/1987, K. Ijima leg. (IJ); 1 ex., Shiriuchi, Oshima, 11/viii/1976, T. Kumata et al. leg. (EIHU); 3 exs., Shibetsu, 24/vii/1966, H. Takizawa leg.; 1 ex., Mt. Yûbari, 10/viii/1966, H. Takizawa leg.; 15 exs., Hokkaidô Univ., Sapporo, 7, 27/vi/1985, M. Ôhara leg.; 8 exs., Misumai, Sapporo, 10 & 12/vii/1991, K. Sayama leg.; 3 exs., Toyotaki, Sapporo, 3/ix/1987, M. Ôhara leg.; 2 exs., Kamui-kotan, 7/viii/1987, M. Ôhara leg.

[Honshû] <Aomori-ken> Paratype, 1Åâ, Hachinohe, 8/vi/1946, A. Fukuda leg. (NA). <Fukushima-ken> 1 ex., Yunohana, Tateiwa, Minami-Aizu, 8/vii/1948, Y. Kurosawa leg. (NSMT). <Gumma-ken> 1 ex., Sarugakyô, 6/vi/1966, M. Ishida leg. <Tôkyô-to> 2ÅâÅâ1Åä, Tôkyô, 19/viii/1972, no collector's name.; 2 exs., Kunitachi, 21/vi/1963, S. Nomura leg. (NSMT). <Kanagawa-ken> 1 ex., Tozuka, Yokohama, 21/v/1972, no collector's name. <Yamanashi-ken> 1 ex., Mt. Daibosatsu, 22/vii/1963, T. Okumura leg.; 1 ex., Sagashiro Spa., 28-30/vii/1961, S. Nomura leg. (NSMT). <Nagano-ken> 1Åâ, Fukushima, Kiso, 11-12/vi/1946, T. Nakane leg. (NA); 2 exs., Kami-kôchi, Shinano, 21-28/vii/1947, S. Ôsawa leg. (NA); 4 exs., Koma-ga-take, Kiso, 4, 5/viii/1946, S. Ôsawa leg. (NA). <Gifu-ken> Paratypes, 1Åâ1Åä, Hirayu, Hida, 24/vii/1946, M. Hayashi leg. (NA).

[Hokkaido] Proper: Sôunkyô, Kamikawa-chô (4 exs., 30/vii/1975, APM), A. Abe; (12 exs., 29/vii/1969, APM), K. Shimoyama; Nopporo, Ebetsu (4 exs., 19/vi; 8 exs., 2/viii/1996), H. Matsumoto; Jôzankei, Sapporo (3 exs., 2/vii/1994, SA), K. Sasaki; Makomanai, Sapporo (4 exs., 24/viii/1995, SA), K. Sasaki; Setarai, Urahoro, (5 exs., 22/vi; 2 exs., 5/vii/1998; KIT), K. Ito.

[Honshu] Aomori-ken: Chikagawa, Mutsu-shi (20 exs., 11/vi; 2 exs., 16/vi; 5 exs., 2/vii; 30 exs., 3/vii; 19 exs., 6/vii; 7 exs., 9/vii/1982; APM), K. Shimoyama & A. Satoh; (2 exs., 2/vii/1982, APM), A. Satoh; Araya, Hiraka-machi (1 ex., 22/vii/1972, APM), A. Satoh; Nakajima, Jûsanko, Shiura-mura (1 ex., 17/vi/1984, APM), no collector's name; Oirase-gawa, Fukaura-machi (4 exs., 16/viii; 4 exs., 18/viii/1975; APM), K. Shimoyama; Futatsumori, Kuroishi-shi (2 exs., 10/vii/1971, APM), K. Shimoyama; Hiraka-machi (1 ex., 24/vi/1973, APM), A. Satoh. Fukushima-ken: Ogawa, Iwaki (2 exs., 27/vi/1993), K. Tazoe. Saitama-ken: Asaka (2 exs., 25/v/1967), K. Sugiyama. Chiba-ken: Aoba, Chiba-shi (2 exs., 13/ix/1986, CBM-Z-53805, 6), H. Yamazaki; Hatori (#2655), Sakura-shi (1 ex., 2­4/x/1997, CBM; 1 ex., SEHU; 2 exs., 29/ix­2/x/1997, carrion baited trap, CBM), M. Maruyama and M. Sano; Nishimikado (#3540), Sakura-shi (1 ex., 2­9/x/1997, CBM; 1 ex., SEHU; 1 ex., 25­27/ix/1997, carrion baited trap, CBM), M. Maruyama and M. Sano; Azeta (#2643), Sakura-shi (3 exs., 27/ix­2/x/1997, CBM; 1 ex., SEHU; 6 exs., 2­4/x/1997, carrion baited trap, CBM), M. Maruyama and M. Sano; Joza (#2623), Sakura-shi (1 ex., 12­20/ix/1997, CBM; 7 exs., 27/ix­2/x/ 1997, CBM; 5 exs., SEHU; 2 exs., 2­4/x/1997, carrion baited trap, CBM), M. Maruyama and M. Sano; Sakato (#3427), Sakura-shi (2 exs., 29/ix/1997, CBM; 1 ex., SEHU), M. Maruyama; Iizuka (#3429), Sakura-shi (3 exs., 29/ix­2/x/1997, CBM; 1 ex., SEHU; 1 ex., 2­9/x/1997, CBM; 2 exs., 27­29/ix/1997, carrion baited trap, CBM), M. Maruyama and M. Sano. Tôkyô-to: Toshima-ku (2 exs., 23/v/1963), S. Kondo. Kanagawa-ken: Ikuta (1 ex., 7/vii/1962), Y. Kurosa. Nara-ken: Wasamata-yama, Kami-kitayama, Yoshino (1 ex., 4­6/viii/1994), T. Itoh; Tenkawa-mura (10 exs., 9/vii/1990, CBM-ZI-41276, -41494­41501, -41503, -41505), A. Saitô.

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