Dercetina shirozui Kimoto, 1969

Lee, Chi-Feng & Bezdek, Jan, 2013, Revision of the genus Dercetina from Taiwan and their similar species, with description of a new species from Myanmar (Insecta, Chrysomelidae, Galerucinae), ZooKeys 323, pp. 1-33 : 13-15

Dercetina shirozui Kimoto, 1969

Dercetina shirozui Kimoto, 1969: 63; Kimoto 1989b: 260 (Taiwan); Kimoto 1991: 17 (Taiwan).

Type series.

Holotype ♀ (KUEC): "(Taiwan) Sungkang Nantou Hsien / 5.V.1965 T. Shirôzu / HOLOTYPE (red label) / Dercetina shirozui Kimoto, n. sp.". Paratypes: 1 ex., same as holotype (KMNH); 1 ex.: "(Taiwan) Sungkang Nantou Hsien / 1.VI.1965 T. Shirôzu / PARATYPE (blue label) / Dercetina shirozui Kimoto, n. sp." (KMNH); 1 ex.: "(Taiwan) Sungkang Nantou Hsien / 18.V.1965 T. Shirôzu / PARATYPE (blue label) / Dercetina shirozui Kimoto, n. sp." (KMNH); 1 ex.: "(Taiwan) Taiko (= Tahu) - Nihonmatsu (= Sungen) Byoritsu-ken (= Miaoli county) 9.iv.1967 T. Shirozu / PARATYPE (blue label) / Dercetina shirozui Kimoto, n. sp." (KMNH); 1 ex.: "(Taiwan) Alishan, 2300m Chiayi Hsien / 6.vii.1965 S. Kimoto / Japan-U. S. Co-op. Sci. Programme (yellow label) / PARATYPE (blue label) / Dercetina shirozui Kimoto, n. sp." (KMNH); 1 ex.: "(Taiwan) Hokuko (= Peikeng) - Kaminoshima-onsen (= Hushan) Byoritsu-ken (= Miaoli county) 11.iv.1967 T. Shirozu / PARATYPE (blue label) / Dercetina shirozui Kimoto, n. sp." (KMNH).

Material examined.

TAIWAN: 1♂, Hsinchu, Litungshan, 23.III.2007, leg. M.-H. Tsou (TARI); 3♂♂, same locality, 15.III.2009, leg. M.-H. Tsou (TARI); 1♂, Hsinchu, Mamei, 13.III.2011, leg. M.-H. Tsou (TARI); 2♀♀, Hsinchu, Tahunshan, 24.II.2009, leg. S.-F. Yu (TARI); 1♂, 2♀♀, same locality, 1.III.2009, leg. M.-H. Tsou (TARI); 1♂, Hsinchu, Wufeng, 17.II.2009, leg. S.-F. Yu (TARI); 1♂, Hualien, Pilu, 17.V.2009, leg. C.-F. Lee (TARI); 8♂♂, Ilan, Chiuchihtse, 7.XII.2008, leg. M.-H. Tsou (TARI); 1♂, 1♀, Ilan, Suyuan, 28.IV.2009, leg. M.-H. Tsou (TARI); 1♀, Kaoshiung, Tengchih (= Shihshan trail), 2-5.VI.2008, leg. C.-F. Lee (TARI); 22♂♂, same locality, 6.II.2009, leg. M.-H. Tsou (TARI); 1♀, Nantou, Hohuanshan, 18.V.2009, leg. C.-F. Lee (TARI); 1♀, Nantou, Meifeng, 5-8.VI.1980, leg. C. C. Chen (TARI); 1♀, same locality, 7-9.V.1981, leg. K. S. Lin & S. C. Lin (TARI); 1♀, same locality, 24-26.VI.1981, leg. K. S. Lin & W. S. Tang (TARI); 1♂, 1♀, same locality, 22.V.1982, leg. L. Y. Chou (TARI); 1♀, Nantou, Tattaka (= Sungkang), VI.1925, leg. J. Sonan (TARI); 1♂, 1♀, same locality, 4.IV.2010, leg. Y.-T. Wang (TARI); 2♂♂, Nantou, Tatachia, 9.VI.2009, leg. C.-F. Lee (TARI); 3♀♀, same locality, 27.IV.2010, leg. C.-F. Lee (TARI); 2♀♀, Nantou, Tayuling, 9-16.VI.1981, leg. K. S. Lin & B. H. Chen (TARI); 1♀, Nantou, Tsuifeng, 3.VI.1980, leg. L. Y. Chou & C. C. Chen (TARI); 3♀♀, same locality, 8.V.1981, leg. K. S. Lin & S. C. Lin (TARI); 1♀, same locality, 25-27.VI.1981, leg. K. S. Lin & W. S. Tang (TARI); 2♀♀, Nantou, Wushe, 6-11.V.1981, leg. K. S. Lin & S. C. Lin (TARI); 1♂, Pingtung, Tahanshan, 2.II.2008, leg. M.-H. Tsou (TARI); 1♀, same locality, 3.III.2008, leg. C.-F. Lee (TARI); 1♂, 1♀, same locality, 21.III.2009, leg. M.-H. Tsou (TARI); 1♂, same locality, 6.III.2010, leg. U. Ong (TARI); 1♂, same locality, 28.IV.2012, leg. M.-H. Tsou (TARI); 2♀♀, same locality, 16.IV.2012, leg. C.-F. Lee (TARI); 1♂, 2♀♀, Taoyuan, Hsitsun, 12.IV.2009, leg. M.-H. Tsou (TARI); 2♂♂, 2♀♀, Taoyuan, Hsuehwunao, 10.IV.2011, leg. M.-H. Tsou (TARI); 1♀, Taoyuan, Lalashan, 2.IV.2009, leg. H.-J. Chen (TARI); 1♀, same locality, 2.IV.2009, leg. C.- F. Lee (TARI); 1♂, same locality, 4.V.2010, leg. S.-F. Yu (TARI); 1♀, same locality, 14.V.2009, leg. C.-F. Lee (TARI).

Diagnosis.

Dercetina shirozui is similar to Dercetina azumai with metallic green elytra and yellowish brown legs but differs by its metallic green head, prothorax, meso- and metathoracic ventrites (in contrast with yellowish brown ones in Dercetina azumai ). Some individuals of Dercetina shirozui with blackish brown legs may be similar to Dercetina itoi . However, Dercetina shirozui is distinguished from Dercetina itoi by the prominent punctures on the pronotum.

Redescription.

Color (Figs 43-44) metallic green or blue, legs and abdomen yellowish brown, antenna dark brown or blackish brown. Antennal calli with deep furrow in middle; vertex with dense distinct punctures, disc shagreened. Pronotum 1.5-1.6 times wider than long, disc evenly flat, with dense prominent punctures, and a pair of deep round fovea at sides; lateral margin straight, narrowed posteriorly, anterior margin slightly concave, posterior margin slightly rounded. Elytra more or less widened posteriorly, apex convergently rounded, 1.7-1.8 times longer than wide, disc with densely prominent punctures; epipleurae with dense prominent punctures.

Male. Length 4.8-5.1 mm, width 2.1-2.3 mm. Ratio of length of antennomeres III to XI about 1.0: 2.2: 2.0: 2.0: 2.1: 2.0: 1.9: 1.7: 2.2; ratio of length to width of antennomeres III to XI about 2.4: 4.9: 3.9: 4.1: 4.1: 3.9: 3.8: 3.4: 4.6 (Fig. 49). Penis (Fig. 51) slender, about 7.3 times longer than wide, parallel-sided, basally widened, apex broadly rounded; tectum membranous, with two longitudinal rows of stout setae; weakly curved in lateral view (Fig. 52); endophallus with four pairs of small teeth near apex, ventral sclerite long, about 0.7 times as long as penis, base truncate, apex bifurcate and curved in lateral view; with a cluster of setae near apex; a pair of elongate dorsal sclerites located from base to apical 1/3, apices pointed and recurved subapically.

Female. Length 5.5-6.3 mm, width 2.7-3.0 mm. Antenna 11-segmented, filiform (Fig. 50), ratio of length of antennomeres III to XI about 1.0: 1.6: 1.5: 1.5: 1.5: 1.5: 1.4: 1.4: 1.7; ratio of length to width of antennomeres III to XI about 2.6: 4.3: 3.7: 3.7: 3.6: 3.7: 3.4: 3.4: 4.1. Sternite VIII (Fig. 53) weakly sclerotized laterally and apically, with a few setae along apical margin, spiculum extremely long. Spermathecal receptaculum (Fig. 51) elongate and weakly swollen; pump narrow and strongly curved, apex narrowly rounded; spermathecal duct short, apically narrowed, shallowly projecting into receptaculum. Gonocoxae (Fig. 54) widely connected in middle, about 3.4 times longer than wide, curved inwards in apical 1/3, with ten long setae in apical 1/3.

Color variation. Some populations have blackish brown legs and black antenna (Fig. 45).

Host plants.

Aceraceae : Acer albopurpurascens Hayata; Actinidiaceae : Actinidia callosa Lindl.; Rosaceae : Prunus phaeosticta (Hance) Maxim.; Saxifragaceae : Deutzia pulchra Vidal and Schizophragma integrifolium Oliv. var. fauriei (Hayata) Hayata; Stachyuraceae : Stachyurus himalaicus Hook. f. & Thomson ex Benth.; Staphyleaceae : Turpinia formosana Nakai.

Distribution.

Taiwan. It is widespread in mountains above 1000 m (Fig. 14).