Sphaeroderma changi, Lee, 2023

Lee, Chi-Feng, 2023, 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., ZooKeys 1185, pp. 1-19 : 1

publication ID	https://dx.doi.org/10.3897/zookeys.1185.112099
publication LSID	lsid:zoobank.org:pub:5B12796B-2102-4994-8D33-53FAD1A1B763
persistent identifier	https://treatment.plazi.org/id/880B2056-1C8E-4C62-AFBB-434F07506557
taxon LSID	lsid:zoobank.org:act:880B2056-1C8E-4C62-AFBB-434F07506557
treatment provided by	ZooKeys by Pensoft
scientific name	Sphaeroderma changi
status	sp. nov.

Treatment

Sphaeroderma changi sp. nov.

Figs 2B View Figure 2 , 5A-C View Figure 5 , 6 View Figure 6

Types.

Holotype ♂ (TARI). Taiwan: Miaoli, Hsishihshan trail (西勢山林道), 26.IX.2021, leg. Y.-F. Hsu. Paratypes. 1♀ (TARI), same but with “28.VIII.2021”.

Description.

Length 3.2 mm, width 2.2 mm. Body color (Fig. 5A-C View Figure 5 ) yellowish or reddish-brown; head, pronotum, and legs blackish-brown; antennae blackish-brown except four basal antennomeres yellowish-brown. Antennae filiform in males (Fig. 6A View Figure 6 ), length ratios of antennomeres I-XI 1.0:0.7:0.4:0.5:0.7:0.7:0.8:0.8:0.8:0.8:1.2, length to width ratios of antennomeres I-XI 2.8:2.2:1.9:2.0:2.7:2.5:2.5:2.3:2.3:2.4:3.5; similar in females (Fig. 6B View Figure 6 ), length ratios of antennomeres I-XI 1.0:0.6:0.5:0.5:0.7:0.6:0.7:0.7:0.7:0.7:0.9, length to width ratios of antennomeres I-XI 2.9:2.2:2.1:2.1:2.7:2.4:2.7:2.6:2.5:2.4:3.2. Antennal calli transverse, with supracallinal sulci well developed. Pronotum 1.7 × 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 1.1-1.2 times longer than wide, sides widely rounded; disc with punctures entirely confused; humeral calli well developed. Abdominal ventrite V without internal median ridge in both sexes. Male genitalia: aedeagus (Fig. 6C, D View Figure 6 ) wide in dorsal view, 3.1 × longer than wide; parallel-sided, apex narrowly rounded, strongly widened at apical 1/8; moderately curved at middle in lateral view; ventral surface with one pair of oblique ridges from apical 1/5 of lateral margins; ostium membranous and with Y-shaped sclerotized area. Female genitalia: ventrite VIII (Fig. 6E View Figure 6 ) with apical part triangular, but sides slightly narrowed near apex, apical margin smooth and with seven pairs of setae medially, disc with medial part membranous, spiculum short; gonocoxae (Fig. 6G View Figure 6 ) separated, longitudinally triangular, with dense, long setae along apical margins, with one slender and transverse basal sclerite; receptacle of spermatheca (Fig. 6F View Figure 6 ) 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.

Diagnosis.

Adults of Sphaeroderma changi sp. nov. have a characteristic and diagnostic color pattern (Fig. 5A-C View Figure 5 ). In addition, this new species differs from the other two Taiwanese species ( S. hsui sp. nov. and S. sheipaensis sp. nov.) based on the following combination of characters: yellowish-brown antennomeres I-IV and black antennomeres V-XI (Fig. 5A-C View Figure 5 ) [entire yellowish-brown antennae in S. hsui sp. nov. (Fig. 3 View Figure 3 )]; transverse antennal calli with well-developed supracallinal sulci (Fig. 2B View Figure 2 ) [longitudinal antennal calli with poorly delimited supracallinal sulci in S. hsui sp. nov. (Fig. 2A View Figure 2 )]; wide aedeagus, 3.1 × longer than wide, ventral disc with one pair of oblique ridges from apical 1/5 in lateral margin (Fig. 6C, D View Figure 6 ) [slender aedeagus, 4.0 × longer than wide and ventral disc without oblique ridges in S. hsui sp. nov. (Fig. 4C, D View Figure 4 )]; triangular abdominal ventrite VIII in females with apical margin with seven pairs of setae at medial part, subapically and slightly narrowed sides (Fig. 6E View Figure 6 ) [apical margin lacking setae; subapically and moderately narrowed sides in S. hsui sp. nov. (Fig. 4E View Figure 4 )]; longitudinally triangular gonocoxae (Fig. 6G View Figure 6 ) [transversely triangular gonocoxae in S. hsui sp. nov. (Fig. 4G View Figure 4 ) and S. sheipaensis sp. nov. (Fig. 7G View Figure 7 )].