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 Author Lee, Chi-Feng Applied Zoology Division, Taiwan Agricultural Research Institute, Taichung 413, Taiwan https://orcid.org/0000-0003-1996-0557 chifeng@tari.gov.tw text ZooKeys 2020 940 117 159 http://dx.doi.org/10.3897/zookeys.940.51800 journal article http://dx.doi.org/10.3897/zookeys.940.51800 1313-2970-940-117 2FE61B8FA2944978B29873EC4B9CD11E 0037845D34625C27A591BD273DD0F50D Chinochya gen. nov. Type species. Monolepta sublata Gressitt & Kimoto, 1963. 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. Description. Coloration (Fig. 15 ): Head, prothorax, and abdomen yellowish brown; antennae black except two basal antennomeres yellowish brown; meso- and metathoracic ventrites black; front legs yellowish brown, but tibia and tarsi darkened; middle and hind legs black; elytra black with one transverse, broad white band at middle. Body length 4.9-6.3 mm. Head . Labrum trapezoidal, transverse, with six pores in transverse row bearing pale setae, anterior margin truncate. Anterior part of head short, almost impunctate and glabrous, four setae on anterior margin of clypeus and several setae along anterior margin of anterofrontal ridge. Interantennal space narrow, 0.8-0.9 x as wide as diameter of antennal insertion. Frontal tubercles transverse, slightly reduced, glabrous. Vertex smooth and glabrous. Antennae slender, covered with dense setae, antennomere II subequal to III in length; similar in both sexes. Pronotum 1.62-1.69 times as broad as long, lateral margins rounded, basally narrowed. Disc covered with dense, fine punctures, moderately convex, without transverse impression. Anterior margin lacking marginal bead, lateral and posterior margins with marginal bead. Anterior and posterior margins without setae, lateral margins with two pairs of setae near base and apex, respectively. Anterior angles moderately swollen, rectangular, posterior angles obtuse angulate, all angles with setigerous pores bearing long pale setae. Scutellum subtriangular, impunctate, glabrous, with rounded apex. Elytra 1.37-1.61 times as long as wide, almost glabrous (with indistinct, sparse, short, pale setae on humeri, lateral margins and apical slopes), parallel-sided, densely covered with coarse, confused punctures. Humeral calli well developed. Epipleura broad at base, strongly narrowed at basal 1/3, abbreviated from apical 1/3 to apex. Macropterous. Ventral surface sparsely covered with fine punctures and pale setae. Anterior coxal cavities almost closed (Fig. 18B ). Prosternal process not visible between procoxae. Abdomen simple, posterior margin of last ventrite with two long incisions in males. Legs slender . All tibiae with one apical spine, the longest spine on metatibia. Protarsomeres I swollen in males (Figs 16J, K , 17J, K ). Metatarsomeres I much longer than pro- and mesotarsomeres I, much longer than II and III combined. Claws appendiculate. Penis (Figs 16C-E , 17C-E ) broad, without lateral processes; tectum elongate, apical margin truncate; internal sac with two types of endophallic spiculae (median and lateral endophallic spiculae). Gonocoxae (Figs 16G , 17G ) slender, tightly conjunct medially; each gonocoxa with nine or ten setae from near apex to apex, subapically widened, apex oblique truncate. Ventrite VIII (Figs 16F , 17F ) well sclerotized except apex, with several short and long setae at apex, and dense long setae at sides, spiculum elongate. Spermathecal receptaculum (Figs 16L , 17L ) strongly swollen, with one erect sclerite; pump slender and curved; sclerotized spermathecal duct extremely elongate, but base wide, followed by short slender tube, then with inflated areas. Bursal sclerites (Figs 15H, I , 16H, I ) with two pairs of well-developed bursal sclerites. 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. Diagnosis. Chinochya gen. nov. differs from Tsouchya gen. nov., Neochya gen. nov., Atrachya Chevrolat, and Monolepta Chevrolat based on the following combination of characters: antennomere II subequal to III in length (Figs 16A, B , 17A, B ) (antennomere II much shorter III in Tsouchya gen. nov. (Fig. 14A, B ) and Atrachya (Fig. 3A, B )); almost closed prothoracic coxal cavities (Fig. 18B ) (completely closed prothoracic coxal cavities in Tsouchya gen. nov. (Fig. 18F ) and Taiwanese species of Monolepta (Fig. 18C ), widely open prothoracic coxal cavities in Atrachya (Fig. 18A ) and Neochya (Fig. 18D )); absence of subscutellar impression on the elytra in males (presence of subscutellar impression on the elytra in those of Atrachya ); tarsomere I of front legs swollen in males (Figs 16J, K , 17J, K ) (not modified in males of other genera); penis without lateral processes near apex (Figs 16C-E , 17C-E ) (with lateral processes in Neochya gen. nov. (Figs 8C-E , 10C-E , 12C-E )); tectum broad and with apical margin truncate (Figs 16C , 17C ) (tectum elongate with apex deeply bifurcate in Atrachya (Fig. 3C )), without pair of lateral sclerites (with one pair of lateral sclerites in Tsouchya gen. nov. (Fig. 14C )); presence of median and lateral endophallic spiculae (Figs 16C, E , 17C, E ) (median and apical endophallic spiculae in Tsouchya gen. nov. (Fig. 14C, D ); only one type of endophallic spiculae in Neochya gen. nov. (Figs 5C-E , 8C-E , 10C-E , 12C-E ); three types of endophallic spiculae in Monolepta ); spermatheca with strongly swollen receptaculum (Fig. 16L , 17L ) (slender receptaculum in Neochya gen. nov. (Figs 5H , 8H , 10H , 12H )), not apically tapering (apically tapering in Neochya gen. nov.), with one erect sclerite (no erect sclerites in others); ventrite VIII in females with dense long setae and well sclerotized (Figs 16F , 17F ) (with few setae and weakly sclerotized in others); two pairs of well-developed bursal sclerites (Figs 16H, I , 17H, I ) (one pair of bursal sclerites in Tsouchya gen. nov. (Fig. 14H ) and Atrachya (Fig. 3H ); reduced in Neochya gen. nov.); nine or ten setae on each gonocoxa, some of them small (Figs 16G , 17G ) (seven or eight setae on each gonocoxa, all long in others). Etymology. Composed from China and Atrachya to indicate the locality of the type species. The gender is feminine. Included species. Chinochya sublata (Gressitt & Kimoto) comb. nov. and C. unifasciata (Takizawa) comb. nov.