Lycocerus okinawanus (Ishida, 1985)

Nakamura, Ryo, 2024, Unexpected discovery of a new Lycocerus (Coleoptera, Cantharidae) from Okinawa Island, Ryukyu Islands, southwest Japan, Zootaxa 5507 (3), pp. 489-497 : 493-494

Lycocerus okinawanus (Ishida, 1985)

( Figs. 2 , 8 , 11 )

Athemus okinawanus Ishida in Satô, 1985: 113, pl. 18, fig. 23 (Okinawa-hontô Is., Ryukyu).

Athemus okinawanus Ishida, 1986: 196 , figs. 4–7 (Ginama-mura, Kunigami, Okinawa Is.); Satô & Okushima, 1992: 858; Takahashi, 1998: 40.

Lycocerus okinawanus ( Ishida, 1986) : Okushima, 2005: 262, figs. 65, 136, 179; Kazantsev & Brancucci, 2007: 252.

Type materials examined. 1 male (holotype), “ Ginama Vil., Kunigami , Okinawa Pref., 1. IV. 1978, N. Kanie leg.” ( EUMJ) ; 1 female (paratype), same data ( EUMJ) ; 1 female (paratype), “ Yona, Kunigami, Okinawa Is. , 2. IV. 1978, N. Kanie leg.” ( EUMJ) ; 1 female (paratype), “IERINDOH, KUNIGAMI V, OKINAWA, 7 VI 1981, T. OHMOTO” ( EUMJ) .

Additional materials examined. 3 males, “Yona, Kunigami-son, Okinawa Pref., 28 Feb. 1995, H. Sato leg.” ( KURA); 1 male, 1 female, same data but “ 13 Feb. 1994, T. Shimizu leg.” ( KURA); 1 female, same data but “ 25 Feb. 1994, T. Shimizu leg.” ( KURA); 1 male, 3 females, same data but “ 6 Mar. 1991, Y. Okushima leg. ( KURA); 2 females, same data but “ 7 Mar. 1991, Y. Okushima leg.” ( KURA); 1 female, same data but “ 12–14 Mar. 1988, Coll. Teruhisa Ueno” ( KURA); 1 male, 1 female, “Yona, Kunigami-son, Okinawa, Ryukyus, Japan, 5-III-1991, T. Ueno leg.” ( KURA); 1 female, “ OKINAWA IS., Yona, 1988-3-13, T. Ueno leg.” ( KURA); 1male, “Yona, Okinawa, Ryukyus, 20-IV-1994, M. Kawanabe” ( EUMJ); 5 males, 2 females, “Mt. Yonaha-dake, Kunigami Son, Okinawa Pref., 8 Mar. 1991, Y. Okushima leg. ( KURA); 2 males, same data but “ 3 Mar. 1995, H. Sato leg.” ( KURA); 1 male, 1 female, same data but “ 2 Mar. 1999, Coll. T. Nonaka” ( KURA); 1 female, same data but “ 5 Apr. 1990, Coll. Y. Okushima” ( KURA); 4 females, “Ohkuni-ridou, Okinawa, Ryukyus, 10-II-2003, M. Sato leg.” ( EUMJ); 2 males, 4 females, “ JAPAN: Okinawa-jima Is., Kunigami-son, Ura, Ôkuni-rindô, 14. II. 2024, Ryo Nakamura leg. ṗäŝ 国DZť大国ṳã ” ( FZUT); 2 females, “[ṗäŝ ạüƜ] ṗäḁ国DZō国DZťṉǭẹ, 28. II. 2015, leg. DƂ尚* ” ( FZUT); 1 male, 2 females, “Benoki-dam, Kunigami Son, Okinawa Pref., 2 Mar. 1995, H. Sato leg.” ( KURA); 1 male, “ mṵṗäḛŝṗä×ŝṉǭẹダム, [ JAPAN]: the Ryukyus, Okinawa Isls., Okinawa Is., Benoki, 26°48’01.1”N 128°16’106.7”E, 5. III. 2023. J. Souma leg.” ( FZUT); 1 female, “ mṵṗäḛŝṗä×ŝṉ ǭẹ, [ JAPAN]: the Ryukyus, Okinawa Isls., Okinawa Is., Benoki Dam, 26°47’09.9”N 128°15’15.9”E, 5. III. 2023. J. Souma leg.” ( FZUT); 1 female, “Haneji, Nago City, Okinawa Pref., 11 Mar. 1991, Y. Okushima leg.” ( KURA); 1 male, 2 females, “Haneji, Okinawa, 23. III. 1986, M. Sawai leg.” ( EUMJ); 1 male, “HANEJI, Is. Okinawa, 16. III. 1987, M. SAWAI” ( FZUT); 1 female, “Afuso, Onna Son, Okinawa Pref., 3 Apr. 1989, Coll. T. Ueno” ( KURA); 1 female, “Afuso, Okinawa-hontô Is., Okinawa Pref., 21 Apr. 1989, Coll. Teruhisa Ueno” ( KURA); 2 females, “Kenminnomori, Onna Son, Okinawa Pref., 31 Mar. 1990, Coll. Y. Okushima” ( KURA).

Supplementary description. Male sternite IX (fig. 8D) cymbiform, slightly shorter than tergite IX, 2.80 times longer than wide, lateral margins parallel in the middle, abruptly narrowing in apical 1/4 to form a triangle with a rounded acute angle at the tip.

Distribution. Japan (Ryukyu: Okinawa Island) (fig. 11).

Biology. This species can be caught by sweeping blossoms and green leaves in the primitive or secondary broad-leaved forest ( Okushima, 2005; the author’s personal observation). Adults are collected from mid-February to mid-April.

Nomenclatural comments. Ishida (1986) has hitherto been regarded as the original description of this species ( Satô & Okushima, 1992; Takahashi, 1998; Okushima, 2005; Kazantsev & Brancucci, 2007), but the name “ Athemus okinawanus Ishida ” did appear precedently in Satô (1985) along with color photograph and a short description in the key. Based on ICZN Article 10 and 13 ( International Commission on Zoological Nomenclature, 1999), it is considered that the name Athemus okinawanus Ishida was available at the time of the publication by Satô (1985).

Note. This species is placed in the Lycocerus aegrotus subgroup of the L. aegrotus group by Okushima (2005).

Figures

FIGURE 11. Distribution map of three black-colored Lycocerus species in the Ryukyu Islands, created based on the distributional information presented in this paper.

FIGURES 1–6. Habitus of Lycocerus spp., male. 1 & 4–6, L. todai sp. nov., 1: holotype, dorsal; 4: paratype from Jana, Oppadale, ventral; 5: ditto, alive, dorsal; 6: ditto, alive, lateral; 2, L. okinawanus, dorsal; 3, L. yonaensis, dorsal. Scale bars: 3.0 mm.

FIGURES 7–9.Aedeagus, male tergite IX and male sternite IX of Lycocerus spp. 7, L. todai sp. nov., paratype; 8, L. okinawanus; 9, L. yonaensis. A: aedeagus, ventral; B: ditto, lateral; C: ditto, dorsal; D: tergite IX and sternite IX, ventral. Scale bars: 0.5 mm.