Sikkimia sufangae, Lee, Chi-Feng & Bezdek, Jan, 2016

Lee, Chi-Feng & Bezdek, Jan, 2016, Revision of the wingless Sikkimia Duvivier (Coleoptera, Chrysomelidae, Galerucinae) from Taiwan, including a new generic synonymy and four new species descriptions, ZooKeys 553, pp. 79-106 : 89-93

Taxon classification Animalia Coleoptera Chrysomelidae

Sikkimia sufangae sp. n. Figs 9, 14, 16, 30-32, 42-44, 50, 58-63, 64-70

Type locality.

Taiwan: Pingtung county, Tahanshan (大漢山), 22°24'27"N, 120°45'23"E, 1400 m.

Type material

(n= 75). Holotype ♂: Pingtung: Tahanshan (大漢山), 6.VI.2012, leg. C.-F. Lee. Paratypes: 5♂♂, 9♀♀, same data as holotype (2♂♂, 2♀♀ in JBCB); 1♂, same locality, 18.VII.2007, leg. C.-F. Lee; 1♂, 1♀, same locality, 22.I.2009; leg. S.-F. Yu; 1♂, same locality, 25.V.2009, leg. M.-L. Jeng; 1♀, same locality, 21.I.2012, leg. S.-F. Yu; 1♀, same locality, 19.VII.2012, leg. C.-F. Lee; 2♂♂, same locality, 29.IV.2013, leg. Y.-T. Chung; 1♂, same locality, 2.VI.2013, leg. J. Yamasako (EUMJ); 1♀, same locality, 29.VI.2013, leg. B.-X. Guo; 3♀♀, same locality, 8.VII.2013, leg. B.-X. Guo; 3♀♀, same locality, 11.VII.2013, leg. B.-X. Guo; 1♀, same locality, 12.VII.2013, leg. Y.-T. Chung; 1♀, same locality, 19.VII.2013, leg. M.-H. Tsou; 1♀, 28.VIII.2014, leg. Y.-T. Chung; 3♀♀, 4.X.2014, leg. Y.-T. Chung; 8♂♂, 1♀, same locality, 1.V.2015, leg. Guo & Chung; 1♂, same locality, 19.V.2015, leg. Y.-T. Chung; 3♂♂, same locality, 27.V.2015, leg. Y.-T. Chung; 1♂, same locality, 29.V.2015, leg. Y.-T. Chung; 4♂♂, 3♀♀, same locality, 6.VI.2015, leg. Y.-T. Chung; 3♂♂, Peitawushan (北大武山), 22°37'47"N, 120°45'41"E, 22.IV.2015, leg. J.-C. Chen; 7♂♂, 7♀♀, same locality, 24.IV.2015, leg. J.-C. Chen.

Description

Male. Length 7.8-9.0 mm; width 4.0-4.3 mm. Coloration (Figs 58-60) brown, head dark brown, legs and antennae black. Antenna (Fig. 64) long, about as long as body; antennomeres I to VII filiform; VIII and IX widening slightly; × and XI (Figs 30-32, 42-44) extremely swollen, × with shallow groove from middle to apex of mesal surface; apex of XI pointed, moderately concave in basal 1/4 of outer surface and in apical 1/3 of mesal surface, dorsal surface with two longitudinal ridges, one close to mesal margin, from base to near middle, strongly curved; other longitudinal ridge along mesal margin extending from basal ¼ to apical 1/3, projecting medially, with a deep groove between the longitudinal ridges, and a transverse groove near the base, shallowly depressed on outer antero-lateral surface; length ratio of II to XI about 1.0: 1.4: 1.8: 2.2: 2.0: 1.9: 2.1: 1.9: 1.8: 2.8, and length to width ratios of II to XI about 1.6: 1.9: 2.9: 2.7: 2.6: 2.8: 2.8: 2.5: 1.9: 2.2. Pronotum transverse, 1.5 × wider than long; anterior and posterior margins almost straight; lateral margin weakly rounded; disc with small punctures. Elytra narrow, about 1.4 × longer than wide; densely and randomly punctuate, humeri reduced. Abdominal ventrite V trilobed, internal anterior margin extended, reaching ventrite III; median longitudinal, internal ridge running from base to apex of extension. Abdominal tergite I with only spiracles sclerotized; tergites II-V with sclerotized spiracles and transverse weakly sclerotized areas; most of tergite VI and spiracles strongly sclerotized; tergite VII entirely and strongly sclerotized. Aedeagus (Figs 66-67) slender, about 5.9 × longer than wide, base moderately incised medially, basal 1/3 wide, narrowing considerably towards the rounded apex, ventral surface well sclerotized and smooth; moderately curved in lateral view; endophallic sclerite longitudinal and extremely slender, bifurcate apically, about 0.3 × as long as aedeagus.

Female. Length 7.8-8.1 mm; width 5.2-5.3 mm. Similar to males (Figs 61-63), but antennae filiform (Fig. 65), antennomeres× and XI not swollen; length ratio of II to XI about 1.0: 1.5: 2.0: 1.9: 2.0: 1.9: 1.8: 1.9: 2.0: 2.6, and length to width ratios of II to XI about 1.9: 2.3: 3.3: 3.2: 3.4: 3.1: 3.0: 3.1: 3.4: 4.0. Elytra as wide as long. Gonocoxae (Fig. 68) slender, about 3.6 × longer than wide, joined from base to middle, base rounded, strongly narrowed in basal 1/3, apices tubular curved slightly inwards, diverging, apex with seven or eight setae. Ventrite VIII (Fig. 69) weakly sclerotized; apex extremely transverse, apical margin widely rounded, disc with long scattered long setae towards apex. Abdominal tergites I–III membranous with only the spiracles sclerotized, IV–VII entirely and strongly sclerotized. Receptacle of spermatheca (Fig. 70) strongly swollen and transverse, pump long and strongly curved; proximal spermathecal duct short and swollen distally.

Diagnosis.

Sikkimia sufangae is similar to Sikkimia babai . See diagnosis of Sikkimia babai for a summary of the differentiating characteristics of these two species.

Host plant.

Polygonum chinense L.; Polygonum posumbu Buch.-Ham. ex Don ( Polygonaceae ) (Fig. 16).

Etymology.

This new species is named after Mrs. Su-Fang Yu, who is a member of TCRT and the first to collect this new species.

Distribution.

Southern Taiwan (Fig. 50).