Pyrrhalta semifulva 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

publication ID	https://dx.doi.org/10.3897/zookeys.1039.64740
publication LSID	lsid:zoobank.org:pub:3487C357-0FAC-4907-A5C0-C0A0C801C6E3
persistent identifier	https://treatment.plazi.org/id/F3A641DF-B6F4-528B-BAB1-E012F1B717C3
treatment provided by	ZooKeys by Pensoft
scientific name	Pyrrhalta semifulva species group
status

Treatment

Included species.

Pyrrhalta maculata Gressitt & Kimoto, 1963; P. tsoui Bezděk & Lee, 2019; P. formosanensis sp. nov.; P. semifulva (Jacoby, 1885); P. discalis Gressitt & Kimoto, 1963; P. ishiharai Kimoto, 1976; and P. wulaiensis sp. nov.

Diagnosis.

Small sized species (3.3-5.6 mm). Antenna stout, antennomeres VIII-X stout (1.4-2.0x longer than wide), III-VI slender. Body convex. Elytra relatively wider, 1.4-1.6 × longer than wide. Aedeagus asymmetric; ostium covered by a membrane or lacking cover; endophallic sclerites composed of two slender sclerites, with several teeth on apex of primary sclerite and with one additional tooth near apex of secondary sclerite except P. formosanensis sp. nov. with only primary sclerite (Fig. 28D-F View Figure 28 ), P. maculata lacking teeth on sclerites (Fig. 24C, D View Figure 24 ), P. semifulva (Fig. 29C, D View Figure 29 ) and P. discalis (Fig. 32C, D View Figure 32 ) lacking additional tooth on secondary sclerite. The ventrite VIII in females apically sclerotized, with dense short and long setae mixed along apical margin; spiculum long (Figs 24F View Figure 24 , 25F View Figure 25 , 28H View Figure 28 , 29G View Figure 29 , 32E View Figure 32 , 35F View Figure 35 , 36E View Figure 36 ). Gonocoxae apically sclerotized and with variable number of setae; both gonocoxae small and connected, with two long setae on each gonocoxa in P. maculata (Fig. 24H View Figure 24 ) and P. tsoui (Fig. 25J View Figure 25 ), both gonocoxae longitudinally oriented and connected, with a number of setae near apices in P. discalis (Fig. 32I View Figure 32 ), gonocoxae longitudinal and with dense, long setae in P. ishiharai (Fig. 35K View Figure 35 ), both gonocoxae separated, transverse, and disc with a number of scattered short setae in P. wulaiensis sp. nov. (Fig. 36I View Figure 36 ). Both gonocoxae separated, small and with dense short setae in P. formosanensis sp. nov. (Fig. 28J View Figure 28 ) and P. semifulva (Fig. 29K View Figure 29 ). Apical margin of abdominal ventrite V truncate or slightly concave, with deeply rounded depression at middle in males(Figs 24J View Figure 24 , 25I View Figure 25 , 28K View Figure 28 , 29J View Figure 29 , 32H View Figure 32 , 35J View Figure 35 , 36H View Figure 36 ); slightly concave or widely rounded in females (Figs 24I View Figure 24 , 25H View Figure 25 , 28L View Figure 28 , 29I View Figure 29 , 32G View Figure 32 , 35I View Figure 35 , 36G View Figure 36 ). Mesotibia with apical spine in males of P. maculata (Fig. 24E View Figure 24 ), P. tsoui (Fig. 25E View Figure 25 ), P. formosanensis sp. nov. (Fig. 28G View Figure 28 ), and P. ishiharai (Fig. 35E View Figure 35 ); or lacking apical spine in those of the remaining species; mesotarsi with tarsomere I modified in males of P. maculata (Fig. 24K View Figure 24 ), P. formosanensis sp. nov. (Fig. 38M View Figure 38 ), and P. ishiharai (Fig. 35H View Figure 35 ).

Remarks.

Included species can be subdivided into species complexes based on similar color patterns. For example, Bezděk and Lee (2019) treated the P. maculata species complex, including P. maculata , P. tsoui , and five more species. They are characterized by their maculate elytra (Fig. 23 View Figure 23 ), strongly curved aedeagi (Figs 24C, D View Figure 24 , 25C, D View Figure 25 ), and only two setae on each gonocoxa (Figs 24H View Figure 24 , 25J View Figure 25 ). Pyrrhalta semifulva and P. formosanensis sp. nov. belong to another species complex characterized by their reddish brown elytra (Fig. 27 View Figure 27 ) and small gonoxae possessing dense setae (Figs 28J View Figure 28 , 29K View Figure 29 ). Pyrrhalta ishiharai is grouped with P. wulaiensis sp. nov. based on the longitudinal ridges of the elytra (Fig. 34A, D View Figure 34 ) and angular apices of aedeagi (Figs 35C View Figure 35 , 36C View Figure 36 ).