Taiwanaenidea cheni Lee and Beenen

Lee, Chi-Feng & Beenen, Ron, 2015, Revision of Taiwanaenidea Kimoto, 1984 (Coleoptera: Chrysomelidae: Galerucinae), Zootaxa 4020 (1), pp. 153-168 : 155-159

Taiwanaenidea cheni Lee and Beenen , sp. nov.

( Figs 2 , 6–19)

Type locality. Taiwan: Pingtung county, Peitawushan (®⋏AM), 22°37’N, 120°43’E, 1700 m.

Type material (n= 62). Holotype ♂: “ Taiwan: Pingtung (13226) / Peitawushan (®⋏AM) / 29.VII.2009, leg. J.-C. Chen [p, w]” ( TARI). Paratypes: 6♂♂ ( TARI), same as holotype but with “13227-13232”; 3♂♂, 7♀♀: “ Taiwan: Pingtung / Peitawushan (®⋏AM) / 11.VIII.2013, leg. Y.-T. Chung [p, w]” ( TARI); 3♀♀: “ Taiwan: Pingtung / Peitawushan (®⋏AM) / 15.VIII.2013, leg. Y.-T. Chung [p, w]” ( TARI); 6♀♀: “ Taiwan: Pingtung / Peitawushan (®⋏AM) / 19.VIII.2013, leg. Y.-T. Chung [p, w]” ( TARI); 1♀: “ Taiwan: Pingtung / Peitawushan (®⋏AM) / 27.VIII.2013, leg. Y.-T. Chung [p, w]” ( TARI)’ 1♀: “ Taiwan: Pingtung (#16072) / Tahanlintao (⋏Α ϔffi) / 9.VI.2010, leg. J.-C. Chen [p, w]” ( TARI); 5♂♂, 2♀♀: “ Taiwan: Pingtung (18784-18790) / Tahanlintao (⋏Αϔffi) / 05.IV.2011, leg. J.-C. Chen [p, w]” ( RBCN); 1♂, 1♀: “ Taiwan: Pingtung (18964–18965) / Tahanlintao (⋏Αϔffi) / 9.VI.2010, leg. J.-C. Chen [p, w]” ( TARI); 1♀: “ Taiwan: Pingtung (22474) / Tahanlintao (⋏Αϔffi) / 10.IV.2012, leg. J.-C. Chen [p, w]” ( TARI); 1♂: “ Taiwan: Pingtung (22633) / Tahanshan (⋏ΑM) / 28.IV.2012, leg. M.-H. Tsou [p, w]” ( TARI); 1♂: “ Taiwan: Pingtung / Tahanshan (⋏ΑM) / 14.III.2013, leg. Y.-T. Chung [p, w]” ( TARI); 1♀: “ Taiwan: Pingtung / Tahanshan (⋏ΑM) / 10.V.2013, leg. Y.-T. Chung [p, w]” ( TARI); 3♂♂, 2♀♀: “ Taiwan: Pingtung / Tahanshan (⋏ΑM) / 06.IV.2014, leg. Y.-T. Chung [p, w]” ( TARI); 1♂: “ Taiwan: Pingtung / Tahanshan (⋏ΑM) / 02.IV.2015, leg. Y.-T. Chung [p, w]” ( TARI); 11♂♂, 4♀♀: “ Taiwan: Pingtung (22519–22533) / Jinshuiying (α*Α) / 12.IV.2012, leg. C.-F. Lee [p, w]” ( TARI).

Differential diagnosis. Taiwanaenidea cheni sp. nov. is similar to T. collaris with shining dorsum that lacks micro-reticulation. But T. cheni sp. nov. displays a characteristic color pattern (reddish brown head and prothorax and black elytra) that is different from T. collaris (greenish or bluish bronze head, prothorax, and elytra). In addition, although main parts of the endophallic sclerites of both species are similar, the shapes and sizes of these sclerites are different between the species. The curve sclerites are directed outwards (directed inwards in T. collaris ), a baso-lateral apophyses of the dorsal tube-like sclerite is present (simple basal opening in T. collaris ), and the outer sclerites are well developed (reduced outer ones in T. collaris ).

Males. Length 4.2–5.9 mm, width 1.5–2.1 mm. General color (Figs 6–7) blackish metallic, head, pronotum, and leg yellowish brown. Discs of head, pronotum, and elytron smooth, without micro-reticulation. Head strongly constricted behind eye. Antenna ( Fig. 12 ) filiform and extremely elongate, as long as body, antennomere III to X slightly curved, ratio of length of antennomeres III to XI about 1.0: 1.3: 1.2: 1.2: 1.2: 1.2: 1.2: 1.0: 1.1; ratio of length to width from antennomere III to XI about 3.8: 5.1: 5.3: 5.3: 5.3: 5.2: 5.2: 4.5: 4.9. Pronotum as long as wide, narrowed at middle. Elytra 1.9X longer than wide, parallel-sided. Tarsomeres I of front and middle legs normal. Median lobe of abdominal ventrite V rectangular, apical margin slightly convex. Penis ( Figs 14–16 ) elongate, widest at apical 1/3, narrowed at apical 1/4, deeply bifurcate from apical 1/4 to apex, apically tapering, apex narrowly rounded; tectum well sclerotized, apex narrowly rounded; apex straight in lateral view, abruptly curved at apical 1/3; endophallus with two pairs of long and curved setae, one shorter and about 0.4X long as the other, longer one directed outwards, with one small, outer, well developed sclerite with two setae; ventrally covered with one piece of dense setae, dorsally covered with one elongate tube-like sclerite, with baso-laeral apophyses.

Females. Length 5.6–6.4 mm, width 1.9–2.3 mm. Similar to male (Figs 9–10), but head slightly constricted behind eyes. Antenna 0.9X long as body ( Fig. 13 ); ratio of length of antennomeres III to XI about 1.0: 1.3: 1.2: 1.0: 1.1: 1.1: 1.0: 1.0: 1.1; ratio of length to width from antennomere III to XI about 3.7: 4.8: 4.4: 3.8: 4.1: 4.2: 4.1: 4.1: 4.4. Apical margin of abdominal ventrite V truncate. Gonocoxae ( Fig. 17 ) slender, and combined together from basal 1/6 to apical 1/3, apex of each gonocoxa widely rounded, with eight long setae; widened at middle and slightly recurved; base wide. Ventrite VIII ( Fig. 18 ) well sclerotized; apex wide, apical margin truncate; disc with several extremely long setae at sides, one row of long setae near apical margin and one row of short setae along apical margin; spiculum long. Spermathecal receptaculum ( Fig. 19 ) strongly swollen, distinctly separated from pump; pump strongly curved, abruptly narrowed at base; spermathecal duct wide, deeply projecting into receptaculum.

Variation. Specimens collected from Peitawushan have darkened antenna, tarsi, tibia, and apex of femur, and yellowish brown meso- and metathoracic and abdominal ventrites (Fig. 11).

Host plants. Adults feed on a number of species belonging to Lauraceae , including Cinnamomum insularimontanum Hayata , Persea philippinensis (Merr.) Elmer , and Machilus thunbergii Sieb. & Zucc.

Distribution. Southern Taiwan. This new species is only known from two localities (Peitawushan and Tahanshan) in Pingtung County ( Fig. 20 ).

Etymology. This new species is named after Mr. Jung-Chang Chen, who is a member of TCRT and the first to collect this new species.

Figures

FIGURES 1 – 5. Ecological photography. 1. Collecting adults of Taiwanaenidea by sweeping tender leaves of Alnus formosana with extendable insect net; 2. A male of T. cheni sp. nov., attempting to mate with female; 3. A male of T. collaris; 4. A male of T. strigosa attempting to mate with female; 5. A female of T. strigosa coming out from tender leaves of Fagus hayatae.

FIGURES 12 – 19. Diagnostic characters of Taiwanaenidea cheni sp. nov. 12. Antenna, male; 13. Antenna, female; 14. Penis, dorsal view; 15. Penis, lateral view; 16. Penis, ventral view; 17. Gonocoxae; 18. Abdominal ventrite VIII; 19. Spermatheca.

FIGURES 20 – 23. Distribution map of Taiwanaenidea species, solid line: 1000 m, broken line: 2000 m. 20. T. cheni sp. nov.; 21. T. collaris Kimoto, 1984; 22. T. jungchangi sp. nov.; 23. T. strigosa Kimoto, 1984.