Chinochya, 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

publication ID	https://dx.doi.org/10.3897/zookeys.940.51800
publication LSID	lsid:zoobank.org:pub:2FE61B8F-A294-4978-B298-73EC4B9CD11E
persistent identifier	https://treatment.plazi.org/id/F1F08437-3300-4C41-B900-C765AA4E77E3
taxon LSID	lsid:zoobank.org:act:F1F08437-3300-4C41-B900-C765AA4E77E3
treatment provided by	ZooKeys by Pensoft
scientific name	Chinochya
status	gen. nov.

Treatment

Chinochya gen. nov.

Type species.

Monolepta sublata Gressitt & Kimoto, 1963.

Description.

Coloration (Fig. 15 View Figure 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 × 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 View Figure 18 ). 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 View Figure 16 , 17J, K View Figure 17 ). Metatarsomeres I much longer than pro- and mesotarsomeres I, much longer than II and III combined. Claws appendiculate.

Penis (Figs 16C-E View Figure 16 , 17C-E View Figure 17 ) 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 View Figure 16 , 17G View Figure 17 ) 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 View Figure 16 , 17F View Figure 17 ) well sclerotized except apex, with several short and long setae at apex, and dense long setae at sides, spiculum elongate. Spermathecal receptaculum (Figs 16L View Figure 16 , 17L View Figure 17 ) 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 View Figure 15 , 16H, I View Figure 16 ) with two pairs of well-developed bursal sclerites.

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 View Figure 16 , 17A, B View Figure 17 ) (antennomere II much shorter III in Tsouchya gen. nov. (Fig. 14A, B View Figure 14 ) and Atrachya (Fig. 3A, B View Figure 3 )); almost closed prothoracic coxal cavities (Fig. 18B View Figure 18 ) (completely closed prothoracic coxal cavities in Tsouchya gen. nov. (Fig. 18F View Figure 18 ) and Taiwanese species of Monolepta (Fig. 18C View Figure 18 ), widely open prothoracic coxal cavities in Atrachya (Fig. 18A View Figure 18 ) and Neochya (Fig. 18D View Figure 18 )); 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 View Figure 16 , 17J, K View Figure 17 ) (not modified in males of other genera); penis without lateral processes near apex (Figs 16C-E View Figure 16 , 17C-E View Figure 17 ) (with lateral processes in Neochya gen. nov. (Figs 8C-E View Figure 8 , 10C-E View Figure 10 , 12C-E View Figure 12 )); tectum broad and with apical margin truncate (Figs 16C View Figure 16 , 17C View Figure 17 ) (tectum elongate with apex deeply bifurcate in Atrachya (Fig. 3C View Figure 3 )), without pair of lateral sclerites (with one pair of lateral sclerites in Tsouchya gen. nov. (Fig. 14C View Figure 14 )); presence of median and lateral endophallic spiculae (Figs 16C, E View Figure 16 , 17C, E View Figure 17 ) (median and apical endophallic spiculae in Tsouchya gen. nov. (Fig. 14C, D View Figure 14 ); only one type of endophallic spiculae in Neochya gen. nov. (Figs 5C-E View Figure 5 , 8C-E View Figure 8 , 10C-E View Figure 10 , 12C-E View Figure 12 ); three types of endophallic spiculae in Monolepta ); spermatheca with strongly swollen receptaculum (Fig. 16L View Figure 16 , 17L View Figure 17 ) (slender receptaculum in Neochya gen. nov. (Figs 5H View Figure 5 , 8H View Figure 8 , 10H View Figure 10 , 12H View Figure 12 )), 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 View Figure 16 , 17F View Figure 17 ) (with few setae and weakly sclerotized in others); two pairs of well-developed bursal sclerites (Figs 16H, I View Figure 16 , 17H, I View Figure 17 ) (one pair of bursal sclerites in Tsouchya gen. nov. (Fig. 14H View Figure 14 ) and Atrachya (Fig. 3H View Figure 3 ); reduced in Neochya gen. nov.); nine or ten setae on each gonocoxa, some of them small (Figs 16G View Figure 16 , 17G View Figure 17 ) (seven or eight setae on each gonocoxa, all long in others).