Neochya hirashimai (Kimoto) Lee, 2020

Lee, Chi-Feng, 2020, Revision of Taiwanese species of Atrachya Chevrolat, 1836 (Coleoptera, Chrysomelidae, Galerucinae): descriptions of three new genera, two new species, and designations of three new synonyms, ZooKeys 940, pp. 117-159 : 117

Neochya hirashimai (Kimoto) comb. nov. Figures 7 , 8

Atrachya hirashimai Kimoto, 1969: 54; Kimoto 1989: 257.

Types.

Holotype ♂ (KUEC): "(Taiwan) / Alishan, 2300m / Chiayi Hisen [p, w] // 9 [h].IV.1965 / Y. Hirashima [p, w] // Japan -U. S. / Co-op. Sci. / Programme [p, y] // Atrachya / hirashimai / Kimoto, n. sp. [h, w] // HOLOTYPE [p, r]. Paratypes: 1♂ (KMNH), same data as holotype but with "PARATOPOTYPE [p, b]"; 1♂ (KMNH): "(Taiwan) / Fenchihu (奮起湖), 1400 m / Chiayi Hsien [p, w] // 12[h].IV.1965 / T. Shirôzu [p, w] // Japan -U. S. / Co-op. Sci. / Programme [p, y] // Atrachya / hirashimai / Kimoto, n. sp. [h, w] // PARATYPE [p, b]".

Other material

(N = 81). Chiayi: 4♂♂, 4♀♀ (TARI), Alishan (阿里山), 12.V.2011, leg. C.-F. Lee; 2♂♂, 1♀ (TARI), Shihshan catchwater, 23.XI.2013, leg. W.-C. Liao; 3♂♂, 3♀♀ (TARI), same locality, 21.I.2017, leg. W.-C. Liao; Nantou: 1♀ (TARI), Tatachia (塔塔加), 15-22.IV.2007, leg. C.-S. Tung; 1♀ (TARI), same locality, 9.VI.2009, leg. C.-F. Lee; 9♂♂, 3♀♀ (TARI), same locality, 30.X.2009, leg. C.-F. Lee; 2♂♂ (TARI), same locality, 29-30.XII.2009, leg. H. Lee, M.-H. Tsou, H. Lee; 8♂♂, 6♀♀ (TARI), same locality, 27.IV.2010, leg. C.-F. Lee; 5♂♂, 6♀♀ (TARI), same locality, 16-17.V.2010, leg. C.-F. Lee & M.-H. Tsou; 2♂♂, 4♀♀ (TARI), same locality, 8-9.V.2011, leg. C.-F. Lee & M-H. Tsou; 1♀ (TARI), Tungpu (東埔), 8.V.2015, leg. J.-C. Chen; Taitung: 2♂♂, 1♀ (TARI), Hsiangyang (向陽), 5.IV.2012, leg. J.-C. Chen; 1♀ (TARI), same locality, 3.VII.2014, leg. J.-C. Chen; 4♂♂, 4♀♀ (TARI), Liyuan (栗園), 23.V.2011, leg. C.-F. Lee; 1♂, 3♀♀ (TARI), Motien (摩天), 19.VI.2011, leg. C.-F. Lee.

Redescription.

Length 5.1-6.2 mm, width 2.4-3.1 mm. General colo r yellowish brown (Fig. 7A-C ); prothorax and head reddish brown, but anterior portion of head darker; antennae, tibiae, and tarsi black. Antennae (Fig. 8A ) filiform in males, ratio of length of antennomeres I to XI 1.0: 0.4: 0.4: 1.0: 1.1: 1.1: 1.1: 1.0: 1.0: 0.9: 1.0; ratio of length to width from antennomere I to XI 3.6: 1.7: 1.8: 4.5: 5.1: 5.3: 5.3: 4.7: 4.5: 4.1: 4.4; slender in females, ratio of length of antennomeres I to XI (Fig. 8B ) 1.0: 0.4: 0.4: 0.8: 1.0: 0.9: 1.0: 0.8: 0.8: 0.8: 0.9; ratio of length to width from antennomere I to XI 4.2: 2.0: 2.4: 4.7: 5.7: 5.5: 5.7: 5.1: 5.2: 5.2: 3.9. Pronotum 1.92-2.00 times wider than long; lateral margins straight and basally narrowed, basal margin slightly rounded, apical margin slightly concave; disc with dense coarse punctures, with lateral depressions. Elytra 1.57-1.68 times longer than wide; lateral margins widest at apical 1/3; disc slightly convex, with dense, coarse punctures; apex rounded. Penis (Fig. 8C-E ) wide, ca. 4.0 times longer than wide; lateral margins parallel from base to middle, then strongly broadened, widest at apical 1/3; apex broadly rounded; tectum elongate from apical 1/6 to middle, lateral margins slightly rounded and toothed, apex truncate but medially depressed; weakly curved in middle in lateral view; ventral surface with membranous area from apex to apical 1/4; with one small rounded process on lateral margin at apical 1/6. Endophallic spiculae complex, with five or six pairs of hooked spiculae; with one pair of longitudinal rows of hair-like setae and small rounded sclerites near base. Gonocoxae (Fig. 8F ) slender, tightly conjunct from apex to middle; each gonocoxa with eight setae from apical 1/6 to apex, subapically widened, apex narrowly rounded, base shallowly bifurcate. Ventrite VIII (Fig. 8G ) weakly sclerotized except apex, with several long setae at apex, and several long setae at sides, spiculum elongate. Spermathecal receptaculum (Fig. 8H ) as slender as pump, apically tapering; pump slender and curved; sclerotized spermathecal duct extremely elongate, but base extremely wide, followed by slender tube, then with inflated areas. Bursal sclerites reduced.

Variation.

A distinct color pattern occurs in beetles from the east part of South Cross-Island Highway (南橫公路): general color black; but apical 3/4 of elytra and abdomen yellowish brown (Fig. 7C-E ).

Diagnosis.

Neochya hirashimai (Kimoto) is similar to N. tsoui sp. nov. in having slender elytra and lateral depressions on the pronotum (Figs 2D-F , 7 ) (wide elytra and lacking lateral depressions on the prnotum in others (Figs 4 , 9 ), but differs from N. tsoui sp. nov. in having reddish brown pronotum and yellowish brown elytra, or black pronotum, black basal half and yellowish brown apical half of elytra (Fig. 7 ) (reddish brown pronotum and elytra in N. tsoui sp. nov. (Fig. 2D-F )). In addition, males of both species are separated from others with serrate margin of tectum of the penis (Figs 8C , 12C ) (smooth margin of tectum (Figs 5C , 10C ), but males of N. hirashimai differs from those of N. tsoui with the penis widest at middle (Fig. 8C, E ) (penis widest at apical 2/5 in N. nitidissima (Fig. 12C, E ).

Food plants.

Celastraceae : Celastrus kusanoi Hayata (Fig. 1B, C ), C. punctatus Thunb.

Distribution.

Restricted to several places in central Taiwan. Two color patterns are separated in the eastern and western parts of the range (Fig. 6B ).

Figures

Figure 1. Habitat photographs A adult of Neochya chengi sp. nov. feeding on leaves of Celastrus hindsii B adult of N. hirashimai C Celastrus kusanoi, food plant for Neochya species D adult of N. nitidissima feeding on leaves of Euonymus spraguei E adult of N. tsoui resting on underside of leaves of Euonymus spraguei F Euonymus spraguei, food plant for Neochya species.

Figure 2. Habitus of Atrachya menetriesii and Neochya tsoui A A. menetresii, male, dorsal view B same, male, color variation C same, female, dorsal view D N. tsoui, male, dorsal view E same, ventral view F same, female, dorsal view.

Figure 4. Habitus of Neochya chengi sp. nov. A male, dorsal view B same, color variation C female, dorsal view D male, from Tahanshan (大漢山), dorsal view E same, ventral view F female, from Kenting (墾丁), dorsal view.

Figure 5. Diagnostic characters of Neochya chengi sp. nov. A antenna, male B antenna, female C aedeagus, dorsal view D aedeagus, lateral view E aedeagus, ventral view F gonocoxae G abdominal ventrite VIII H spermatheca.

Figure 6. Distribution map of Neochya species, solid line: 1000 m, broken line: 2000 m A N. chengi sp. nov. B N. hirashimai.

Figure 7. Habitus of and Neochya hirashimai A male, from Tatachia (塔塔加), dorsal view B same, ventral view C female, from Tatachia (塔塔加), dorsal view D male, from Liyuan (栗園), dorsal view E same, ventral view F female, from Liyuan (栗園), dorsal view.

Figure 8. Diagnostic characters of Neochya hirashimai A antenna, male B antenna, female C aedeagus, dorsal view D aedeagus, lateral view E aedeagus, ventral view F gonocoxae G abdominal ventrite VIII H spermatheca.

Figure 9. Habitus of Neochya nitidissima A form A, female, from Alishan (阿里山), dorsal view B same, ventral view C form B, male, from Kuanwu (觀霧), dorsal view D same, ventral view E form C, female, from Pilu (碧綠), dorsal view F same, ventral view G form D, female, from Taikang trial (泰崗林道), dorsal view H same, ventral view I form E, male, from Peitawushan (北大武山), dorsal view.

Figure 10. Diagnostic characters of Neochya nitidissima A antenna, male B antenna, female C aedeagus, dorsal view D aedeagus, lateral view E aedeagus, ventral view F gonocoxae G abdominal ventrite VIII H spermatheca.

Figure 12. Diagnostic characters of Neochya tsoui sp. nov. A antenna, male B antenna, female C aedeagus, dorsal view D aedeagus, lateral view E aedeagus, ventral view F gonocoxae G abdominal ventrite VIII H spermatheca.