Four new species of Sphaeroderma Stephens (Coleoptera, Chrysomelidae, Galerucinae, Alticini) from Taiwan, with discussion on genus boundaries based on S. flavonotatum Chujo and S. jungchani sp. nov. Author Lee, Chi-Feng https://orcid.org/0000-0003-1996-0557 Applied Zoology Division, Taiwan Agricultural Research Institute, Taichung 413, Taiwan chifeng@tari.gov.tw text ZooKeys 2023 2023-11-27 1185 1 19 http://dx.doi.org/10.3897/zookeys.1185.112099 journal article http://dx.doi.org/10.3897/zookeys.1185.112099 1313-2970-1185-1 5B12796B210249948D3353FAD1A1B763 99994BD90C195466A249943D2E939FB4 Sphaeroderma sheipaensis sp. nov. Figs 3C , 5D-F , 7B, E-G Types. Holotype ♀ (TARI). Taiwan: Miaoli, Hsishihshan trail (西勢山林道), 28.VIII.2021, leg. Y.-F. Hsu. Paratype . 1♀ (TARI), Hsiaopangchih (小胖池), 28.VIII.2021, leg. Y.-F. Hsu. Description. Length 2.4 mm, width 1.8 mm. Body color (Fig. 5D-F ) blackish-brown, head, prothorax, scutellum yellowish-brown; elytra metallic blue, metafemora blackish-brown; antenna black except four basal antennomeres yellowish-brown. Antennae filiform in females (Fig. 7B ), length ratios of antennomeres I-XI 1.0:0.6:0.4:0.4:0.6:0.6:0.7:0.7:0.8:0.7:1.0, length to width ratios of antennomeres I-XI 2.9:2.2:2.2:2.0:2.5:2.5:2.3:2.3:2.5:2.2:3.4. Antennal calli transverse, with supracallinal sulci well developed. Pronotum 1.9 times wider than long, disc with fine, scattered punctures the same size as those on elytra; lateral margins almost straight; anterolateral callosity protruding forward; posterolateral callosity poorly developed. Elytra 1.1 times longer than wide, sides widely rounded; disc with punctures entirely confused; humeral calli well developed. Female genitalia: ventrite VIII (Fig. 7E ) with apical part triangular, but sides slightly narrowed near apex, apical margin smooth and depressed at middle, lacking setae; disc with medial part membranous, spiculum short; gonocoxae (Fig. 7G ) separated, transversely triangular, with dense, long setae along apical margins, with one slender and transverse basal sclerite; receptacle of spermatheca (Fig. 7F ) moderately swollen; pump short and strongly curved, transverse wrinkles present on entire pump and extending onto half of receptacle; sclerotized proximal spermathecal duct long, with ramus oblong. Males unknown. Diagnosis. Adults of Sphaeroderma sheipaensis sp. nov. have a characteristic and diagnostic color pattern (Fig. 5D-F ). In addition, this new species differs from the two other Taiwanese species ( S. hsui sp. nov. and S. changi sp. nov.) based on the following combination of characters: yellowish-brown antennomeres I-IV and black antennomeres V-XI (Fig. 5D-F ) [entire yellowish-brown antennae in S. hsui sp. nov. (Fig. 3 )]; transverse antennal calli with well-developed supracallinal sulci (Fig. 2C ) [longitudinal antennal calli with poorly delimited supracallinal sulci in S. hsui sp. nov. (Fig. 2A )], triangular abdominal ventrite VIII in females with apical margin lacking setae, subapically and slightly narrowed sides (Fig. 7E ) [apical margin with seven pairs of setae at medial part in S. changi sp. nov. (Fig. 6E ), subapically and moderately narrowed sides in S. hsui sp. nov. (Fig. 4E )]; transversely triangular gonocoxae (Fig. 7G ) [longitudinally triangular gonocoxae in S. changi sp. nov. (Fig. 6G )]. Etymology. The species is named for Shei-Pa National Park (雪霸國家公園) where three new species were collected. Distribution. Sphaeroderma sheipaensis sp. nov. is a rarely collected species known from two localities in Shei-Pa National Park.