Pyrrhalta ohbayashii Kimoto, 1984

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 ohbayashii Kimoto, 1984 Figs 48D , 49A-C , 50

Pyrrhalta ohbayashii Kimoto, 1984: 46; Kimoto 1987: 188 (additional records); Kimoto 1991: 9 (additional records); Kimoto and Chu 1996: 57 (catalogue); Kimoto and Takizawa 1997: 300 (key), 373; Beenen,2010: 453 (catalogue); Xue and Yang 2010: 127 (catalogue); Yang et al. 2015: 119 (catalogue).

Types.

Holotype ♀ (KUEC, by original designation): "(FORMOSA) / Mt. Lala-shan [拉拉山] / Taoyuan Hsien / 7, V 1982 / N. Ohbayashi leg. [p, w] // Pyrrhalta / Pyrrhalta ohbayashii / Kimoto, n. sp. [h, w] // HOLOTYPE [p, r] // KU. Type / No. 2438 [p, w]". Paratype. 1♀ (KMNH): "(FORMOSA) / Mt. Lala-shan [拉拉山] / Taoyuan Hsien / 7, V 1982 / N. Ohbayashi leg. [p, w] // Pyrrhalta / Pyrrhalta ohbayashii / Kimoto, n. sp. [h, w] // PARATOPOTYPE [p, b]".

Other material.

Taiwan. Kaohsiung: 1♀ (KMNH), Tayuenshan, near Liukui (六龜), 5.VI.1989, leg. K. Baba, det. S. Kimoto , 1990; 1♂ (TARI), Tengchih (藤枝), 10.VIII.2013, leg. W.-C. Liao ; 1♂ (TARI), same locality, 8.V.2020, leg. Y.-C. Hsu ; 1♀ (TARI), Tona trail (多納林道), 5.XI.2016, leg. W.-C. Liao ; Pingtung: 1♀ (TARI), Peitawushan (北大武山), 28.V.2014, leg. Y.-T. Chung ; 4♀ (TARI), same but with “1.IX.2016”; 1♂, 1♀ (TARI), same but with “30.IV.2017”; 2♀ (TARI), same but with “28.IX.2017”; 3♂, 1♀ (TARI), Shahsi trail (沙溪林道), 20.VII.2017, leg. B.-X. Guo ; 5♂, 7♀ (TARI), Taiwu (泰武), 11.IX.2020, leg. Y.-T. Chung ; Taipei: 3♂ (TARI), Yingzuling (鶯子嶺), 24.VII.2010, leg. Y.-L. Lin.

Redescription.

Length 4.5-4.6 mm, width 1.9-2.1 mm. Body color (Fig. 49A-C ) dark brown; antennae black except three basal antennomeres. Eyes large, interocular space 1.77-1.91 × diameter of eye. Antennae filiform in males (Fig. 50A ), gradually broadened from antennomere IV, broadest at VII and VIII, then gradually narrowed to apical antennomere, length ratios of antennomeres I-XI 1.0: 0.5: 0.8: 0.7: 0.7: 0.6: 0.6: 0.6: 0.6: 0.6: 0.7, length to width ratios of antennomeres I-XI 3.0: 2.2: 3.5: 3.0: 2.6: 2.0: 1.8: 1.9: 1.8: 1.7: 2.5; similar in females (Fig. 50B ), length ratios of antennomeres I-XI 1.0: 0.5: 0.9: 0.7: 0.7: 0.7: 0.7: 0.6: 0.6: 0.6: 0.8, length to width ratios of antennomeres I-XI 3.3: 2.0: 3.5: 2.8: 2.4: 2.1: 2.0: 1.7: 1.9: 1.9: 2.6. Pronotum and elytra convex. Pronotum 1.8-1.9 × wider than long, disc with reticulate microsculpture; with extremely dense, coarse punctures, and short pubescence, with median longitudinal and lateral depressions; lateral margins slightly rounded, widest at middle, apical and basal margin slightly concave; anterior and posterior setiferous punctures slightly erect. Elytra elongate, parallel-sided, 1.7-1.8 × longer than wide; disc with reticulate microsculpture, with sparse, coarse punctures, and short pubescence. Apical spur of tibia of middle leg small (Fig. 50G ), and tarsomere I of middle with narrow basal half and small acute process at basal 1/3 in lateral view in males (Fig. 50L ). Aedeagus (Fig. 50C-E ) broad in dorsal view, 4.2 × longer than wide, broadest at middle, symmetric, apex lanceolate; ostium transverse at apical 1/3, not covered by a membrane; strongly curved near base and at apical 1/5 in lateral view, apex narrowly rounded; two endophallic sclerites small and elongate, primary sclerite straight in lateral view, 0.3 × as long as aedeagus, secondary sclerite curved in lateral view, 0.7 × as long as primary sclerite. Gonocoxae (Fig. 50H ) basally connected, short, with a number of long setae near apex. Ventrite VIII (Fig. 50F ) with apical area well sclerotized, apical margin truncate but slightly concave at middle, with dense, long setae along apical area, spiculum extremely long. Receptacle of spermatheca (Fig. 50I ) very swollen; pump long and strongly curved; sclerotized proximal spermathecal duct wide and short. Apical margin of abdominal ventrite V slightly concave medially and with deep depression in males (Fig. 50K ); straight in females (Fig. 50J ).

Remarks.

Adults of P. ohbayashii Kimoto (Fig. 49C ) are similar to those of P. ishiharai Kimoto (Fig. 34A ) and P. wulaiensis sp. nov. (Fig. 34D ) in possessing longitudinal ridges on the brown elytra, but differ by the narrower elytra, 1.7-1.8 × longer than wide (elytra 1.5 × longer than wide in P. ishiharai and P. wulaiensis sp. nov.). Gonocoxae are similar to those species of Xanthogaleruca . In males of P. ohbayashii , the aedeagus is diagnostic; strongly curved at apical 1/3 and the extremely small endophallic sclerites.

Food plant.

Adults feed on leaves of Prunus phaeosticta var. phaeosticta (Hance) Maxim. (Fig. 48D ).

Distribution.

The species is widespread at lowlands (0-1,500 m) in northern and southern Taiwan.

Figures

Figure 34. Habitus of Pyrrhalta ishiharai Kimoto and P. wulaiensis sp. nov. A P. ishiharai, female, typical form, dorsal view B ditto, ventral view C ditto, lateral view D P. wulaiensis sp. nov., female, dorsal view E ditto, ventral view F ditto, lateral view.

Figure 48. Field photographs of Pyrrhalta lineatipes (Takei) and P. ohbayashii Kimoto on host plant A P. lineatipes, egg masses B same, third-instar larvae C same, adults D P. ohbayashii, adult.

Figure 49. Habitus of Pyrrhalta ohbayashii Kimoto and P. takizawai Kimoto A P. ohbayashii, male, dorsal view B ditto, ventral view C ditto, lateral view D P. takizawai, female, dorsal view E ditto, ventral view F ditto, lateral view.

Figure 50. Diagnostic characters of Pyrrhalta ohbayashii Kimoto A antenna, male B antenna, female C aedeagus except apex, dorsal view D apex of aedeagus, dorsal view E aedeagus, lateral view F abdominal ventrite VIII G apex of tibia of middle leg, male H gonocoxae I spermatheca J abdominal ventrite V, female K abdominal ventrite V, male L tarsi of middle leg, male.