Pyrrhalta kobayashii Kimoto, 1974

Lee, Chi-Feng & Bezdek, Jan, 2021, Revision of the genera Xanthogaleruca Laboissiere, 1932 and Pyrrhalta Joannis, 1865 (Coleoptera, Chrysomelidae, Galerucinae) of Taiwan, with type designation of Galerucella lineatipes Takei, ZooKeys 1039, pp. 1-108 : 1

Pyrrhalta kobayashii Kimoto, 1974 Figs 45A-C , 46

Pyrrhalta kobayashii Kimoto, 1974: 25; Kimoto and Chu 1996: 56 (catalogue); Kimoto and Takizawa 1997: 301 (key), 373; Beenen 2010: 453 (catalogue); Xue and Yang 2010: 124 (catalogue); Yang et al. 2015: 117 (catalogue).

Types.

Holotype ♀ (OMNH): "Mt. ALI / FORMOSA / 22.VII.1970 / T. KOBAYASHI [p, y] // Pyrrhalta / Pyrrhalta kobayashii / Kimoto [h, w] // HOLOTYPE [p, r]. Paratype. 1♀ (KMNH): "(TAIWAN) / Alishan (阿里山) / Chiai Hsien [p] / 29[h]. VII. 1966 / H. Kamiya leg. [p, w] // Pyrrhalta / Pyrrhalta kobayashii / Kimoto [h, w] // PARATYPE [p, b]".

Other material.

Taiwan. Nantou: 1♀ (TARI), Huakang (華岡), 20.VII.2017, leg. J.-C. Chen ; Taichung: 1♀ (TARI), Pilu (畢祿), 2.VII.2008, leg. M.-H. Tsou ; Taitung: 1♀ (TARI), Hsiangyang (向陽), 12.VII.2012, leg. J.-C. Chen.

Redescription

(females). Length 6.2-6.3 mm, width 3.2 mm. Body yellow (Fig. 45A-C ); but antennae, lateral margins of elytra (sutures, basal and lateral margins), tibiae, and tarsi black; apices of femora darker. Eyes small, interocular space 2.05-2.09 × diameter of eye. Antennae filiform (Fig. 46A ), length ratios of antennomeres I-XI 1.0: 0.5: 0.9: 0.8: 0.8: 0.8: 0.8: 0.8: 0.7: 0.7: 1.0, length to width ratios of antennomeres I-XI 3.2: 2.2: 3.6: 3.3: 3.2: 3.0: 2.9: 2.8: 2.5: 2.9: 4.1. Pronotum and elytra convex. Pronotum 1.8-2.0 × wider than long, with transverse ridge along apical margin deflexed at antero-lateral angles; disc smooth, with coarse punctures laterally, smaller medially; with dense short pubescence, but reduced above ridge, with median longitudinal and lateral depressions; lateral margins moderately rounded, widest at middle, apical and basal margins slightly concave; anterior and posterior setiferous punctures not erect. Elytra broad, parallel-sided, 1.5-1.6 × longer than wide; disc smooth, with dense, fine punctures, and dense, short pubescence, one pubescent seta in each puncture. Gonocoxae (Fig. 46D ) apically sclerotized, small, broadly rounded, disc and apical margin with short dense setae. Ventrite VIII (Fig. 46B ) transverse, with apical margin depressed at middle, a number of long setae near apical margin, spiculum long. Receptacle of spermatheca (Fig. 46C ) slightly swollen and elongate; pump short and strongly curved; sclerotized proximal spermathecal duct narrow and short. Apical margin of abdominal ventrite V moderately concave medially (Fig. 46E ).

Remarks.

The color pattern of adults of P. kobayashii (Fig. 45A ) is similar to that of the typical form of P. discalis Gressitt & Kimoto (Fig. 31A ). The species differs by the more slender antennae, antennomeres IV-X 2.8-3.6 × longer than wide (Fig. 46A ) (antennomeres IV-X 1.7-2.4 × longer than wide in P. discalis (Fig. 32B )) and relatively narrow elytra, 1.6 × longer than wide (elytra 1.4 × longer than wide in P. discalis ).

Food plant.

Unknown.

Distribution.

The species occurs at scattered localities at mid-altitudes (1,500-2,500 m) in central and southern Taiwan.

Figures

Figure 31. Habitus of Pyrrhalta discalis Gressitt & Kimoto A male, typical form, dorsal view B ditto, ventral view C ditto, lateral view D male, color variation, dorsal view E male, color variation, dorsal view F male, color variation, dorsal view.

Figure 32. Diagnostic characters of Pyrrhalta discalis Gressitt & Kimoto A antenna, male B antenna, female C aedeagus, dorsal view D ditto, lateral view E abdominal ventrite VIII F spermatheca G abdominal ventrite V, female H abdominal ventrite V, male I gonocoxae.

Figure 45. Habitus of Pyrrhalta kobayashii Kimoto and P. lineatipes (Takei) A P. kobayashii, female, dorsal view B ditto, ventral view C ditto, lateral view D P. lineatipes, lectotype, dorsal view E P. lineatipes, paralectotype, dorsal view F P. lineatipes, type labels G P. humeralis, from Taiwan, female, dorsal view H ditto, ventral view I ditto, lateral view.

Figure 46. Diagnostic characters of Pyrrhalta kobayashii Kimoto, female A antenna B abdominal ventrite VIII C spermatheca D gonocoxae E abdominal ventrite V.