Charaea costatum (Kimoto, 1996)

Bezděk, Jan & Lee, Chi-Feng, 2014, Revision of Charaea (Coleoptera: Chrysomelidae: Galerucinae) from Taiwan, Zootaxa 3861 (1), pp. 1-39 : 5-6

Charaea costatum (Kimoto, 1996)

( Figs 1–4 , 23 , 32–33 )

Exosoma costatum Kimoto, 1996: 36 (original description); Kimoto & Takizawa 1997: 305 (key), 381. Taphinellina costata: Beenen 2010: 489 (catalogue).

Charaea costatum: Beenen & Warchałowski 2010: 61 (catalogue).

Type locality. “Chinanshan, nr. Liukuei, Kaohsiung Hsien”.

Type material examined. Holotype: ♀ ( KMNH), “Nr. Liukuei [Chinese letters] / Kaohsiung Hs. / Taiwan [p] 19 VIII [h] 19 [p] 89 [h] / W. Chen Leg. [w, p] // HOLOTYPE [r, p] // Exosoma / costata / Kimoto, n. sp. [h] / Det. S. Kimoto 19 [w, p] // 2001822IR06 [w, p] // KMNHIR200,097 [w, p]”. Paratype: ♀ ( KMNH), “Liukuei, Kaohsiung / Hsien, Taiwan [p] // 22 [h] V [p] III [h] 1987 [p] / W. L. Chen Leg. / NAGOYA UNIV. COLL. [w, p] / / Exosoma / costata / Kimoto, n. sp. [h] / Det. S. Kimoto 19 [w, p] // PARATYPE [b, p]”.

Additional material examined. 17 specimens — TAIWAN: Hsinchu County: 1 ♀, Kuanwu, 7.vi.2010, L.-H. Sun leg. ( TARI). Hualien County: 1 ♀, coastal range SE of Fuli, 23°09´N 121°17´E, 500 m, 12.–16.xi.2008, L. Dembický leg. ( BMNH). Kaohsiung County: 1 ♀, Shihshan logging trail, 1.–3.x.2008, M.-H. Tsao leg. ( TARI). Nantou County: 1 ♀, Sungkang, 2100 m, 6.viii.1984, K. S. Lin leg. ( TARI); 3 ♀♀, Meifeng, 2130 m, 29.viii.–10.ix.1979, malaise trap, without name of collector ( TARI); 1 ♀, Meifeng, 2130 m, 22.–29.viii. 1979, malaise trap, without name of collector ( TARI); 3 ♀♀, Meifeng, 2150 m, 24.–26.vi.1981, K. S. Lin & Tang W. S. leg. ( TARI); 1 ♀, Meifeng, 2150 m, 26.viii.1980, K. S. Lin & C. H. Wang leg. ( TARI); 2 ♀♀, Meifeng, 2150 m, 28.–29.viii.1981, L. Y. Chou & S. C. Lin leg. ( TARI); 2 ♀♀, Tungpu, 1200 m, 18.–23.xi.1981, T. Lin & W. S. Tang leg. ( TARI); 1 ♀, Tungpu, 1200 m, 19.–23.vii.1982, L. Y. Chou & T. Lin leg. ( TARI).

Redescription. Measurements. Females: 3.7–4.6 mm (holotype 4.0 mm). Dorsal side almost glabrous with sparse short setae on posterior third of elytra, oval, moderately convex. Body, legs and antennae metallic bluishblack, except mouthparts brown to black and abdomen yellow.

Female ( Fig. 23 , holotype Fig. 32 ). Anterior part of head impunctate, almost glabrous, with very short setae on anterior margin of clypeus. Interantennal space 0.8 times as wide as transverse diameter of antennal socket.

Interocular space 2.3 time as wide as transverse diameter of eye. Antennae filiform, 0.65 times as long as body, length ratio of antennomeres equals 10-5-6-9-11- 11-11-11-10 -10-13.

Pronotum 1.3 times as broad as long, widest in anterior third, covered with fine punctures. Anterior margin slightly concave, lateral margins slightly rounded, posterior margin widely rounded with middle part straight. Anterior margin very finely bordered, lateral and posterior margins moderately bordered. Anterior angles rectangular, swollen with setigerous pore, posterior angles obtusangulate with small pointed tip with setigerous pore, all pores bearing long pale seta, additional short setae visible on lateral margins of pronotum.

Elytra 1.45–1.50 times as long as wide and 0.7 times as long as body, widest in midlength.

Length ratio of protarsomeres I, II, III and V equals 9-5-5-9, of metatarsomeres I, II, III and V equals 13-6-5- 12.

Posterior margin of last ventrite widely rounded ( Fig. 1 ). Pygidium subtriangular with rounded apex ( Fig. 2 ). Sternite VIII subpentagonal, apical margin straight, group of 5 setae placed laterally at each side, tignum slender, 2.1 times longer than sternite VIII ( Fig. 4 ). Spermatheca: nodulus suboval, slightly narrower anteriorly, cornu narrower than nodulus, rectangular, proximal spermathecal duct gradually narrowing posteriorly ( Fig. 3 ).

Male. Unknown.

Distribution. Taiwan.

Biology. Unknown.

Differential diagnosis. Charaea costatum can be distinguished from all congeners (not only from Taiwan) by costa on lateral slope in posterior half of elytra.

Figures

FIGURES 1 – 4. Details of Charaea costatum. 1 — female last ventrite; 2 — female pygidium; 3 — spermatheca; 4 — sternite VIII. Scale bars: 0.5 mm for Figs 1 – 2, 0.25 mm for Figs 3 – 4.

FIGURES 23 – 28. Habitus of Charaea. 23 — Ch. costatum (female, 5.1 mm); 24 — Ch. kelloggi (male, 5.1 mm); 25 — Ch. mimicum (male, 5.3 mm); 26 — Ch. miyamotoi (male, 4.2 mm); 27 — Ch. akkoae (male, Japan, 3.3 mm); 28 — Ch. pseudoakkoae (male, 3.7 mm).

FIGURES 32 – 39. Type specimens of Charaea and their labels. 32 – 33 — Exosoma costatum (holotype, female, 4.0 mm); 34 – 35 — Calomicrus kelloggi (paratype, male, 4.6 mm); 36 – 37 — Calomicrus miyamotoi (paratype, male, 3.5 mm); 38 – 39 — Calomicrus takizawai (holotype, male, 3.6 mm).