Lochmaea jungchani, Lee, Chi-Feng, 2019

Lee, Chi-Feng, 2019, The genus Lochmaea Weise, 1883 in Taiwan: results of taxonomic expeditions by citizen scientists (Coleoptera, Chrysomelidae, Galerucinae), ZooKeys 856, pp. 75-100 : 95-98

Lochmaea jungchani sp. n. Figs 10E, F, 11 D–F, 13

Type material

(n = 33). Holotype ♂ (TARI): Chiayi: Yushan East Peak (玉山東峰), 3869 m, 20.IX.2018, leg. J.-C. Chen. Paratypes. 7♂♂, 8♀♀ (TARI), same data holotype; 6♂♂, 5♀♀ (TARI), Yushan North Peak (玉山北峰), 3858 m, 20.IX.2018, leg. J.-C. Chen; 2♂♂ (TARI), Yushan West Peak (玉山西峰), 3518 m, 19.IX.2018, leg. J.-C. Chen; 3♀♀ (TARI), Yushan Main Peak (玉山主峰), 3950 m, 17.VIII.2017, leg. J.-C. Chen; 1♂ (TARI), Paiyun Lodge (排雲山莊), 3400 m, 24.X.2017, leg. J.-C. Chen.

Diagnosis.

Lochmaea jungchani sp. n. cannot be distinguished from L. smetanai Kimoto based on external morphology but differs with the relatively slender median lobe, 6.8 × longer than wide (Fig. 13C) (broader median lobe in L. semtanai , 5.7 × longer than wide (Fig. 9C)); shorter elongate endophallic sclerite, 0.5 × as long as median lobe (Fig. 13C) (longer elongate endophallic sclerite in L. smetanai , 0.7 × as long as median lobe (Fig. 9C)); apical margin of abdominal ventrite V in females with narrow notch margined with longitudinal ridges (Fig. 13I) (angular notch in L. smetanai (Fig. 9I)).

Description.

Length 5.5-6.5 mm, width 2.8-3.3 mm. General color (Fig. 11 D–F) yellowish brown to reddish brown; vertex and pronotum with median longitudinal dark stripe. Antennae filiform in males (Fig. 13A), length ratios of antennomeres I–XI 1.0: 0.6: 0.9: 0.9: 0.7: 0.7: 0.7: 0.7: 0.6: 0.7: 0.8, length to width ratios of antennomeres I–XI 2.1: 2.1: 2.9: 3.2: 2.5: 2.6: 2.5: 2.6: 2.5: 2.8: 3.1; similar in females (Fig. 13B), length ratios of antennomeres I–XI 1.0: 0.5: 0.7: 0.7: 0.6: 0.7: 0.6: 0.6: 0.6: 0.6: 0.8, length to width ratios of antennomeres I–XI 3.3: 2.0: 2.7: 2.7: 2.5: 2.7: 2.6: 2.7: 2.8: 2.8: 3.3. Pronotum transverse, 1.6 × wider than long, disc with sparse, extremely coarse punctures, and one pair of lateral depressions; lateral margins strongly narrowed basally; margins concave basally and apically. Elytra longitudinal and broadly rounded, 1.4 × longer than wide; disc with random, dense, and extremely coarse punctures. Apical margin of abdominal ventrite V in males rounded, with median notch bearing short, oblique ridges at margin, weakly depressed between ridges. Ventrite V in females medially depressed, with narrow notch margined with longitudinal ridges at middle. Median lobe (Fig. 13C, D) extremely slender, 6.8 × longer than wide, apically tapering from middle, parallel-sided from base to middle; opening elongate, located on right, starting from apical 1/6; in lateral view strongly curved, slightly oblique; internal sac with one elongate sclerite, 0.5 × as long as median lobe, one additional sclerite located near base of elongate sclerites, base wide, apically tapering. Gonocoxae (Fig. 13F) elongate, membranous except apical parts, with one pair of weakly sclerotized, elongate sclerites at base; apical parts elongate, bearing tiny, scattered setae and four long setae at apices. Ventrite VIII (Fig. 13E) longitudinal and well sclerotized; apex rounded; abruptly broader at apical 1/5, with paired cluster of long setae near middle, disc bearing scattered, tiny setae along apical margin; spiculum long and narrow. Receptacle of spermatheca (Fig. 13G) strongly swollen; pump slender and strongly curved; proximal spermathecal duct deeply inserted into receptacle, broad but short.

Host plant.

Ericaceae : Rhododendron pseudochrysanthum Hayata (Fig. 10E, F).

Biology.

Unknown. Adults are active in the field from August to October.

Etymology.

This new species is named after Mr. Jung-Chan Chen, a member of the TCRT and the first to collect this new species.

Distribution.

Yushan and surrounding areas (Chiayi County).