Sphaeroderma jungchani, 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/AB83115A-5632-466C-B5B5-401A9B92A089
taxon LSID	lsid:zoobank.org:act:AB83115A-5632-466C-B5B5-401A9B92A089
treatment provided by	ZooKeys by Pensoft
scientific name	Sphaeroderma jungchani
status	sp. nov.

Treatment

Sphaeroderma jungchani sp. nov.

Figs 7A, C, D View Figure 7 ; 8G-I View Figure 8 , 10 View Figure 10

Types.

Holotype ♂ (TARI). Taiwan: Pingtung, Nanjenhu (南仁湖), 31.III.2011, leg. J.-C. Chen. Paratypes. 3♂ (BMNH: 2♂; TARI: 1♂), same data as holotype; 1♂ (TARI), same but with “11.IV.2011”; 1♂ (TARI), same but with “3.IV.2023”.

Description.

Length 2.9-3.3 mm, width 2.1-2.3 mm. Body color (Fig. 8G-I View Figure 8 ) blackish-brown; head and prothorax reddish-brown; antennae blackish-brown except three basal antennomeres reddish-brown; elytron with one large white round spot, elytra basally and apically reddish-brown; abdominal ventrite V reddish-brown; legs dark brown but front legs paler. Antennae filiform in males (Fig. 7A View Figure 7 ), apex of antennomere III angular, much smaller than IV, length ratios of antennomeres I-XI 1.0:0.5:0.4:0.5:0.6:0.6:0.7:0.7:0.7:0.7:1.1, length to width ratios of antennomeres I-XI 2.9:1.7:1.6:2.1:2.3:2.1:2.1:2.2:2.1:2.1:3.4. Pronotum 1.7-1.8 × wider than long, disc with coarse, scattered punctures, mixed with fine punctures; lateral margins slightly rounded; anterolateral callosity protruding forward; posterolateral callosity poorly developed. Elytra 1.1-1.2 times longer than wide, sides widely rounded; disc with punctures arranged into longitudinal striae but mixed with additional punctures; humeral calli well developed. Abdominal ventrite V with median internal ridge in males. Antennal calli transverse, with supracallinal sulci well developed. Male genitalia: aedeagus (Fig. 7C, D View Figure 7 ) narrow in dorsal view, 5.2 × longer than wide; parallel-sided, apex narrowly rounded, strongly widened at apical 1/6; almost straight at middle in lateral view and narrow, apex sinuate; ostium membranous and with long median longitudinal sclerite; internal sac with one pair of curved sclerites.

Females unknown.

Diagnosis.

Adults of S. jungchani sp. nov. and S. flavonotatum Chûjô are easily separated by the color surrounding the single pair of large white spots on the elytra: surrounded by reddish-brown elytra in S. jungchani ; black borders surrounding spots on reddish-brown elytra of S. flavonotatum sp. nov. Middle tibiae of S. jungchani sp. nov. males not modified (sexually dimorphic middle tibiae in S. flavonotatum ). Aedeagus narrow in S. jungchani sp. nov., 5.2 × longer than wide, and thin in lateral view (Fig. 7C, D View Figure 7 ) [aedeagus broad, 3.6 × longer than wide, and thick in lateral view in S. flavonotatum (Fig. 9C, D View Figure 9 )].