Chinochya unifasciata (Takizawa, 1978) 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

Chinochya unifasciata (Takizawa, 1978) comb. nov. Figures 15D-F , 17

Atrachya unifasciata Takizawa, 1978: 132.

Monolepta sublata : Kimoto, 1976: 6 (Taiwan). non Monolepta sublata Gressitt & Kimoto, 1963

Types.

Holotype ♂ (SEHU) (Fig. 15D-F ): "Chitou (溪頭) Chu- / shan Taiwan / 6-7.VII.1975 / H. Takizawa [p, w] // Holo [h] -type [p] / Atrachya / unifasciata / Takizawa [h, r] // HOLOTYPE / Appended label by ÔHARA, IMRAI, KANBE / SUZUKI and HIRONAGA / 2007 [p, w, with red band along right margin] // 0000003055 / Sys. Ent / Hokkaido Univ. / Japan [SEHU] [p, w]".

Other material.

Taiwan. Hsinchu: 1♂ (TARI), Talu trail (大鹿林道), 24.VI.2009, leg. Y.-F. Hsu; Maioli: 2♂♂ (TARI), Hsuehchien (雪見), 7.VI.2013, leg. W.-B. Yeh; Kaohsiung: 2♂♂ (TARI), Chungchihkuan (中之觀), 3.VII.2009, leg. S.-F. Yu & M.-H. Tsou; Taitung: 1♀ (TARI), Liyuan (栗園), 19.VI.2013, leg. B.-X. Guo.

Description.

Length 4.9-5.8 mm, width 2.6-3.0 mm. Head, prothorax, and abdomen yellowish brown; antennae black except two basal antennomeres yellowish brown; meso- and metathoracic ventrites black; front legs yellowish brown, but tibiae and tarsi darker; middle and hind legs black; elytra black with one transverse, broad, white band at middle (Fig. 15D, E ). Antennae (Fig. 16A ) filiform in males, ratio of length of antennomeres I to XI 1.0: 0.4: 0.4: 0.9: 0.9: 0.9: 0.9: 0.8: 0.8: 0.7: 0.9; ratio of length to width from antennomere I to XI 3.8: 1.8: 2.0: 3.9: 3.4: 3.5: 3.6: 3.4: 3.6: 3.3: 3.5; similar in females, ratio of length of antennomeres I to XI (Fig. 17B ) 1.0: 0.4: 0.5: 1.0: 1.0: 0.9: 0.9: 0.9: 0.8: 0.8: 0.9; ratio of length to width from antennomere I to XI 3.8: 1.8: 2.1: 4.2: 3.6: 3.3: 3.6: 3.4: 3.3: 3.4: 4.2. Pronotum 1.62-1.67 times wider than long; lateral margins rounded and apically narrowed, basal margin slightly rounded but slightly depressed at middle, apical margin truncate; disc with dense fine punctures, without lateral depressions. Elytra 1.51-1.61 times longer than wide; parallel-sided; disc moderately convex, with dense, fine punctures; apex truncate. Tarsomeres I of front legs swollen in males (Fig. 17J ), but not modified in females (Fig. 17K ). Penis (Fig. 17C-E ) wide, ca. 4.0 times longer than wide; lateral margins parallel from base to apical 2/5, then basally narrowed, apex broadly rounded; with transverse and longitudinal, strongly sclerotized area near apex, intersecting at middle; tectum weakly sclerotized, elongate from apical 1/8 to basal 1/3, apex rounded; basally broadened in lateral view; ventral surface with broad groove from apex to middle. Endophallic spiculae complex: median endophallic spiculae composed with two pairs of different shapes, one pair elongate and with acute apices near middle, outer pair hook-like; lateral endophallic spiculae composed of longitudinal row of hook-like, larger setae ventrally located, small setae dorsally located. Gonocoxae (Fig. 17G ) slender, tightly conjunct from apex to apical 2/5; each gonocoxa with nine setae from apical 1/5 to apex, some setae smaller, subapically widened, apex obliquely truncate. Ventrite VIII (Fig. 17F ) strongly sclerotized except apex, with a number of long setae at sides, short setae along apical margin, spiculum elongate. S permathecal receptaculum (Fig. 17L ) strongly swollen, with one transverse, erect sclerite; pump slender and curved; sclerotized spermathecal duct short (broken), but base extremely wide. Bursal sclerites well developed, dorsal bursal sclerites larger (Fig. 17H ), with one longitudinal row of seven stout setae; the ventral bursal sclerites smaller (Fig. 17I ), with one longitudinal row of 13 or 14 small denticles.

Diagnosis.

Chinochya unifasciata is similar to C. sublata . They cannot be separated based on their external morphology, however, C. unifasciata (Fig. 17C-E ) differs from C. sublata (Fig. 16C-E ) based on genitalic characters as follow: median endophallic spiculae composed of two pairs of sclerites (three different pairs of sclerites in C. sublata ); lateral endophallic spiculae longitudinally arranged (transversely arranged in C. sublata ); ventral bursa sclerite with 13 or 14 small denticles (seven or eight small denticles in C. sublata ).

Distribution.

Widespread but scattered in Taiwan.

Figures

Figure 15. Habitus of Chinochya sublata and C. unifasciata A C. sublata, male, dorsal view B same, ventral view C same, female, dorsal view D C. unifasciata, holotype, dorsal view E same, ventral view F C. unifasciata, holotype, labels.

Figure 16. Diagnostic characters of Chinochya sublata A antenna, male B antenna, female C aedeagus, dorsal view D aedeagus, lateral view E aedeagus, ventral view F abdominal ventrite VIII G gonocoxae H dorsal bursal sclerites I ventral bursal sclerites J protarsi, male K protari, female L spermatheca.

Figure 17. Diagnostic characters of Chinochya unifasciata A antenna, male B antenna, female C aedeagus, dorsal view D aedeagus, lateral view E aedeagus, ventral view F abdominal ventrite VIII G gonocoxae H dorsal bursal sclerites I ventral bursal sclerites J protarsi, male K protari, female L spermatheca.