Pyrrhalta meifena species group

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 meifena species group

Included species.

Pyrrhalta alishanensis sp. nov.; P. igai Kimoto, 1981; P. meifena Kimoto, 1976; and P. meihuai sp. nov.

Diagnosis.

Medium to large sized species (5.6-8.7 mm). Antenna stout, antennomeres VII-X shortest (1.5-2.2 × longer than wide), III-VI similar or slender. Body convex. Elytra relatively broad, 1.4-1.6 × longer than wide. Aedeagus apically tapering and symmetric (Figs 16C , 20C , 22C ) except P. meihuai sp. nov. (Fig. 20C ), ostium obliquely longitudinal and lacking cover; endophallic sclerites composed of primary sclerite with several teeth at apex in P. igai (Fig. 19C ) and P. meifena (Fig. 20C ), with one secondary sclerite in P. meihuai sp. nov. (Fig. 22C, D ) or two secondary sclerites in P. alishanensis sp. nov. (Fig. 16C, D ) Ventrite VIII in females apically sclerotized, apical margin widely rounded and with dense short setae; spiculum long (Figs 16E , 19E , 20E , 22E ). Gonocoxae apically sclerotized and longitudinal, with dense, long setae along lateral and apical margins (Figs 16I , 19I , 20I , 22F ). Apical margin of abdominal ventrite V with one pair of rounded ridges at middle and slightly concave between ridges in males (Figs 16H , 19H , 20H , 22I ); widely rounded in females (Figs 16G , 20G , 22H ) except concave in those of P. igai (Fig. 19G ). Mesotibia lacking apical spine in males and tarsomere I not modified.

Biology.

Larvae and adults feed on leaves of Acer species ( Sapindaceae ).

Figures

Figure 16. Diagnostic characters of Pyrrhalta alishanensis sp. nov. 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 19. Diagnostic characters of Pyrrhalta igai 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 20. Diagnostic characters of Pyrrhalta meifena 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 22. Diagnostic characters of Pyrrhalta meihuai sp. nov. A antenna, male B antenna, female C aedeagus, dorsal view D ditto, lateral view E abdominal ventrite VIII F gonocoxae G spermatheca H abdominal ventrite V, female I abdominal ventrite V, male.