Phymatura japonica Cameron, 1933

Hashizume, Takuto, Yamamoto, Shûhei & Maruyama, Munetoshi, 2023, Revision of the Genera Pseudatheta Cameron and Phymatura Sahlberg (Coleoptera, Staphylinidae, Aleocharinae) from Japan, Zootaxa 5319 (1), pp. 27-47 : 42-44

Phymatura japonica Cameron, 1933 , stat. rev.

( Figs. 2A, E , 8A–C )

[Japanese name: Nihon-kinokotsuyakeshi-hanekakushi]

Phymatura japonica Cameron, 1933: 210 (original description;

type locality; “Chuzenji” [Ch̊zenji, Nikkô-shi, Tochigi-ken, central Honshu]); Sawada, 1977: 217 (as a synonym of Ps. oligotinula ); Schülke & Smetana, 2015: 633 (catalogue, as a synonym of Ph. crenulicauda ).

Phymatura cooteri Assing, 2005: 24 (original description;

type locality: “Bai He [Baihe], Jilin Prov., China ”); Schülke & Smetana, 2015: 633 (catalogue); Assing, 2021: 330 ( Japan: Amami-Ôshima Is.; Russia). Syn. nov.

Material examined. Type material. Phymatura japonica : Holotype: male, “Holo- / type [red round label pinned by a curator] // JAPAN / CHUZENJI // AT FT J. E. A. Lewis // Cameron / Bequest. / B. M. 1955-147. // Phymatura / japonica / TYPE Cam. [handwritten] // Phymatura / japonica Cam. / P. M. Hammond / det. 1973 / HOLOTYPE ” (abdominal segments VIII–X and aedeagus are dissected and mounted in Euparal by MM) ( BMNH).

Additional materials studied. JAPAN: [Hokkaido]: 1 ex., Akan-chô , 2 VIII 1988, K. Haga leg. ( KUM) ; 1 ex., Akan N. Park , 6 VII 1958, M. Miyatake leg. ( EUM) ; 1 male, Taiki-chô , 2 IX 1990, K. Haga leg. ( KUM) ; 7 exs., Sounkyô , 17–18 VII 1970, S. Kinoshita leg. ( EUM) ; [Fukushima-ken]: 1 male, 3 females, Shindenpara, Minamiaizu-machi , 13 VII 1996, K. Haga leg. ( KUM) ; [Saitama-ken]: 1 male, 3 females, Mitsumine, Chichibu-shi, 28 V 1997, M. Maruyama leg. ( KUM); 10 males, 10 females, Taki-gawa, Chichibu-shi, 30 V 1997, M. Maruyama leg. ( KUM); [Tokyo-to]: 1 male, 1 female, Nippara, Okutama-machi, 8 VI 1991, K. Haga leg. ( KUM): 1 female, same data, but 9 VI 1991 ( KUM) ; 1 male, 1 female, Nippara, Okutama-machi, 7 V 1997, T . Shimada leg. ( KUM); [Kanagawa-ken]: 1 male, 2 females, Hakone, 1 V 1974, Y. Hirano leg. ( KUM); 1 female, Nishi Tanzawa , 8 IX 1984, Y. Hirano leg. ( KUM) ; [Niigata-ken]: 1 female, Yuzawa-machi , 1 X 1995, K. Haga leg. ( KUM) ; [Yamanashiken]: 1 male, Sentouboshi-yama, Minaniarupusu-shi , 2 VIII 1992, K. Haga leg. ( KUM) ; [Shizuoka-ken]: 1 female, Sessokyo, Kawanehon-chô, 9–10 V 1992, T . Kishimoto leg. (TKc); 1 femle, Amagi-tôge, Kawazu-chô , 14–16 III 1996, S. Naomi leg. ( KUM) ; [Nara-ken]: 1 female, Ôdaigahara, 29 V 1985, S. Nomura leg. ( KUM); [Hiroshimaken]: 1 male, Kure-shi , 2 XII 1995, I. Okamoto leg. ( KUM) ; [Tokushima-ken]: 1 female, Tsurugi-san , 27 VII 1961, M. T . Chûjô leg. ( KUM); 5 males, 2 females, same data, but 28 VII 1961 ( KUM) ; 1 ex., Tsurugi-san , 11 VII 1993, M. Sakai leg. ( EUM) ; 1 male, Iyadani, Tsurugi-san , 19 VIII 1989, K. Matsumoto leg. ( KUM) ; 1 female, Shikibidani, Naka-chô , 17 VII 2010, J. Aoki leg. ( KUM) ; [Ehime-ken]: 1 ex., Omogo-kei, 2 V 1976, A. Oda leg. ( EUM); 1 ex., Omogo-kei, 4 VI 1983, K. Ishida leg. ( EUM); 1 ex., Banshodani , Omogo, 11 VI 1988, M. Sakai leg. ( EUM); 1 ex., Ôhira, Tôon-shi , 27 IV 2007, T . Kitano leg. ( EUM); [Fukuoka-ken]: 1 female, Tachibana-yama, Fukuoka-shi , 27 XI 1983, S. Naomi leg. ( KUM) ; 1 male, 1 female, Hiko-san , 24 IX 1938, Hori & Fujino leg. ( KUM) ; 2 males, Hiko-san , 7 V 1971, K. Takano leg. ( KUM); 1 female, Hiko-san , Soeda-machi, 23 V 2020, S. Inoue leg. ( KUM); [Saga-ken]: 1 female, Sefuri-san , 3 X 1976, H. Oishi leg. ( KUM) ; [Kumamoto-ken]: 1 male, 1 female, Izumimachi Momigi, 14 V 2021, S. Inoue leg. ( KUM); 1 male, Gokanoshô , 17 X 1988, S. Naomi leg. ( KUM) ; 4 males, 8 females, Asoshi , 3 X 1995, Y. Tomishima leg. ( KUM) ; 1 male, Ichifusa-yama, Mizukami-mura , 13 X 1995, Y. Tomishima leg. ( KUM) ; 2 exs., Ichifusa-yama, 11 VI 1972, S. Hisamatsu leg. ( EUM); 1 male, Kirihagi, Yamato-chô , 15 X 1993, Y. Tomishima leg. ( KUM) ; [Oita-ken]: 1 male, Shônaichô Asono, Yufu-shi, 20 V 2021, T . Hashizume leg. ( KUM); [Kagoshima-ken]: Amami-Ôshima Is .: 12 exs., Hatsuno, 2 V 1977, A. Oda leg. ( EUM); 3 exs., same data, but M. Sakai & A. Oda leg. ( EUM) ; 1 ex., same data, but M. Sakai leg. ( EUM) ; 3 exs., Yuwan , 3 IV 1968, M. Tomokuni leg. ( EUM); Tokuno-shima Is .: 6 exs., Mikyo , 12 IV 1968, M. Tomokuni leg. ( EUM) .

Redescription. Measurements (n = 5): BL ≈ 2.69–3.05; FBL, 1.35–1.65; HL, 0.38–0.46; HW, 0.45–0.51; PL, 0.43–0.51; PW, 0.58–0.69; EL, 0.49–0.61; EW, 0.75–0.86.

(Holotype: BL ≈ 3.2; PL, 0.46; PW, 0.63; HTL, 0.51)

Relative length of antennomeres I–XI (n = 1): 21: 21: 19: 10: 13: 12: 13: 13: 12: 14: 31. Ratio of length/width of antennomeres I–XI (n = 1): 1.88: 2.22: 1.94: 0.82: 0.85: 0.71: 0.76: 0.77: 0.68: 0.73: 1.58.

Body ( Fig. 2A, D ) relatively large. Head dark brown; pronotum brown; posterolateral areas of elytra dark brown, anterior 1/4–1/3, sutural area, and narrow area of posterior margin yellowish brown; abdomen reddish brown, around midline of tergite III–V dark brown, segments VI–VII dark brown.

Head almost as long as wide, HW/HL: 1.11–1.20; surface densely covered with setae.Antenna with antennomeres I–III and XI longer than wide, antennomeres IV–X wider than long; antennomeres I and II with rounded distal end, antennomeres III–X strongly angulated near distal end, antennomere XI oval.

Pronotum transverse, PW/PL:1.32–1.35, PW/HW:1.28–1.34; surface densely covered with setae, finely punctured, without microsculpture; posterior margin slightly bisinuate. Elytra wider than long, EW/EL: 1.34–1.54, EL/PL: 1.12– 1.21, EW/PW: 1.18–1.30; surface densely covered with setae and finely punctured; posterior margin sinuate near posterolateral corners. Hind wings well developed; flabellum with several setae. Mesoventrite with short longitudinal carina from anterior margin; mesoventral process extended to slightly beyond middle of mesocoxal cavities, with pointed apex; metaventral process shorter than mesoventral process, with rounded apex; listhmus absent.

Abdomen slightly narrowed posteriad; surface densely covered with setae.

Male. Tergite VII with a tubercle on posteromedian area. Tergite VIII ( Fig. 8A ) broadly emarginate; one tubercle on median area; eight to ten small processes on posterior margin.Aedeagus as in Fig. 8B ; median lobe with relatively narrow basal bulb; apex of apical process pointed; flagellum well sclerotized, very long.

Female. Spermatheca as in Fig. 8C ; distal portion large; wall of distal end protrudes inward; median portion and proximal portion small.

Distribution. Japan (Hokkaido, Honshu, Shikoku, Kyushu, Amami-Ôshima Is., Tokuno-shima Is.); China (Jilin, Heilongjiang), North Korea, Russia.

Remarks. There is only the male holotype of Ph. japonica in BMNH. The original description of Phymatura cooteri agrees with the feature of the type specimen of Ph. japonica in the shapes of the tergite VIII, sternite VIII and the aedeagus. Therefore, Ph. cooteri is here synonymized with Ph. japonica . Assing (2021) recorded this species from Southwestern Japan (Amami-Ôshima) and Russia. Paśnik (2001) recorded this species from North Korea (see Assing (2005) for more detailed description of Ph. japonica (as Ph. cooteri )).

Figures

FIGURE 2. Habitus of Phymatura spp. and type specimens examined. A. Phymatura japonica Cameron, 1933, stat. rev.; B. Phymatura russa Assing, 2021; C. lectotype of Atheta (Datomicra) crenulicauda Bernhauer, 1907 (=Pseudatheta crenulicauda comb. nov.); D. labels of C; E. holotype of Phymatura japonica Cameron, 1933, stat. rev. Scale bars: 1.0 mm for A–B.

FIGURE 8. Phymatura spp. A–C: Ph. japonica Cameron, 1933, D–F: Ph. russa Assing, 2021. A, D. male tergite VIII in dorsal view; B, E. median lobe of aedeagus in lateral view; C, F. spermatheca. Scale bars: 0.1 mm.