Aulacophora kotoensis Chûjô

Lee, Chi-Feng & Beenen, Ron, 2015, Revision of the genus Aulacophora from Taiwan (Coleoptera: Chrysomelidae: Galerucinae), Zootaxa 3949 (2), pp. 151-190 : 167-169

Aulacophora kotoensis Chûjô

( Figs 4–7 , 62–65, 67, 69–72 )

Aulacophora kotoensis Chûjô, 1962: 79 ( Taiwan) .

Type material. Aulacophora kotoensis : holotype ♂ ( TARI), labeled: “KOTOSHO / (BOTEL-TOBAGO IS.) (= Lanyu island) / FORMOSA / 20.VI–10.VII.1938 / COLL. M. CHUJO [w, p] // Ho / Type [w, p, round label, red letters and border, but faded out] // Aulacophora / kotoensis / Chûjô [h] / DET. M. CHUJO [w, p] // 1813 [w, p]”. Paratypes: 1♀ ( TARI), labeled: “KOTOSHO / (BOTEL-TOBAGO IS.) (= Lanyu island) / FORMOSA / 20.VI– 10.VII.1938 / COLL. M. CHUJO [w, p] // ALLo / Type (w, p, round label, gray letters and border) // Aulacophora / kotoensis / Chûjô [h] / DET. M. CHUJO [w, p] // 1811 [w, p]”; 1♂, 1♀ ( TARI), labeled: “KOTOSHO / (BOTEL- TOBAGO IS.) (= Lanyu island) / FORMOSA / 20.VI–10.VII.1938 / COLL. M. CHUJO [w, p] // Para / Type (w, p, round label, green letters and border) // Aulacophora / kotoensis / Chûjô [h] / DET. M. CHUJO [w, p] // 1820 & 676 [w, p]”; 1♂, 1♀ ( TARI), labeled: “KOTOSHO / FORMOSA / IV.1936 / COLL. Y. CHUJO [w, p] // Para / Type (w, p, round label, green letters and border) // Aulacophora / kotoensis / Chûjô [h] / DET. M. CHUJO [w, p] // 1823 & 684 [w, p]”; 2♂, 2♀ ( TARI), labeled: “Kotosho / 10 III–14.IV.1920 / Sonan [w, h] // Para / Type (w, p, round label, green letters and border) // Aulacophora / kotoensis / Chûjô [h] / DET. M. CHUJO [w, p] // 1422-1424, 2599 [w, p]”; 2♂ ( TARI), labeled: “Kotosho / 20.IX.1923 / Col. T. Okuni. [w, p] // Para / Type (w, p, round label, green letters and border) // Aulacophora / kotoensis / Chûjô [h] / DET. M. CHUJO [w, p] // 1425 & 1426 [w, p]”; 1♂, 2♀ ( TARI), labeled: “ Formosa / Kotosho / III–IV.1932 / S. Hirayama [w, p] // Para / Type (w, p, round label, green letters and border) // Aulacophora / kotoensis / Chûjô [h] / DET. M. CHUJO [w, p] // 681-683 [w, p]”; 2♂, 2♀ ( TARI), labeled: “[Koutousyo] / FORMOSA / XII-1931 - II-1932 / S. Hirayama // Para / Type (w, p, round label, green letters and border) // Aulacophora / kotoensis / Chûjô [h] / DET. M. CHUJO [w, p] // 677-680 [w, p]”.

Other specimens examined. TAIWAN. Taitung: 1♂, Lanyu Is., 22–26.III.1998, leg. C.-F. Lee ( TARI); 3♂, same locality, 29.III.2009, leg. U. Ong ( RBCN); 1♂, 1♀, same locality, 26.IV.2009, leg. U. Ong ( BMNH); 1♂, same locality, 17.III.2012, leg. T.-H. Lee ( MNHUB); 2♂, same locality, 17.III.2012, leg. M.-H. Tsou ( MNHUB); 2♂, same locality, 5.V.2012, leg. S.-F. Yu ( TARI); 2♂, same locality, 14.IV.2013, leg. B.-X. Guo ( TARI); 2♂, 14.IV.2013, leg. B.-X. Guo ( TARI); 1♂, 22.XI.2013, leg. Y.-T. Chung ( TARI); 1♂, 2♀, Hsiaolanyu Is., 26.V.2009, leg. Y.-T. Chung ( TARI); 2♂, 1♀, same locality, 25.VI.2009, leg. Y.-T. Chung ( TARI); 1♀, same locality, 27.VIII.2009, leg. Y.-T. Chung ( TARI).

Diagnosis. Aulacophora kotoensis is similar to A. indica with the enlarged first antennomere in male and conelike pygidium projecting from elytral apices in female, but A. kotoensis has a pair of tubercles on the pronotum in male (without tubercles in A. indica ), slender and black pygidium in female (wide and yellowish brown pygidium in A. indica ).

Males. Length 6.5–7.1 mm, width 3.5–3.8 mm. General color ( Figs 4–5 ) yellowish brown but metathoracic and abdominal ventrites, middle and hind legs black; outer margins of femur and tibia, and tarsi of front legs black; labrum dark brown; antenna dark brown except three basal antennomeres yellowish brown. Antenna ( Fig. 62 ) filiform and slender, antennomere I enlarged; ratio of length of antennomeres III to XI about 1.0: 1.1: 1.1: 1.1: 1.1: 1.0: 1.0: 1.0: 1.2; ratio of length to width from antennomere III to XI about 3.9: 3.4: 3.5: 3.5: 3.4: 3.2: 3.6: 3.6: 4.7. Pronotum with deep, transverse groove; one pair of tubercles behind groove. Elytra with cluster of erect hairs behind humerus. Abdominal tergite VIII well sclerotized ( Fig. 67 ), apical margin with wide triangular incision and apices acute. Median lobe of abdominal ventrite V rectangular, with median, longitudinal, wide groove and abbreviated near apex. Penis ( Figs 64–65 ) slender, parallel-sided, abruptly narrowed at apical 1/7 and apically tapering, apex recurved; slightly curved from middle to apex in lateral view; tectum laterally sclerotized; endophallus with clusters of short setae, and with one longitudinal sclerite, apically tapering, apex strongly curved in lateral view, basally widened.

Females. Length 7.2 mm, width 3.9 mm. Similar to male ( Figs 6–7 ), but pronotum with transverse groove shallow, and without tubercles; cluster of erect hairs on elytra absent; antennomere I not enlarged ( Fig. 63 ); ratio of length of antennomeres III to XI about 1.0: 1.1: 1.0: 1.0: 1.0: 1.0: 1.0: 1.0: 1.2; ratio of length to width from antennomere III to XI about 3.0: 3.2: 3.2: 3.3: 3.3: 3.2: 3.2: 3.2: 4.4. Pygidium projecting from elytral apex, parallel-sided, slender, and apex rounded. Middle of apical margin of abdominal ventrite V ( Fig. 69 ) emarginate, weakly convex at middle of emargination. Gonocoxae ( Fig. 70 ) slender, apex of each gonocoxa with seven or eight setae from apical 1/6 to apex; gonocoxae connected at middle, base slender. Ventrite VIII ( Fig. 71 ) weakly sclerotized; apex narrow, apical margin emarginate at middle, with dense short setae along apex; spiculum short. Spermathecal receptaculum ( Fig. 72 ) a little swollen; pump strongly curved; spermathecal duct short, stout, shallowly projecting into receptaculum.

Host plant. Cucurbitaceae : Trichosanthes quinquangulata A. Gray ( Chûjô 1962; present study).

Remarks. To exclude conspecifity between Aulacophora kotoensis and A. abdominalis ( Fabricius, 1781) it was necessary to study the type specimens of Crioceris abdominalis in the Fabricius-collection. The results of the study of these specimens are treated extensively in the section on Aulacophora abdominalis and partly in the section on A. indica . For the status of A. kotoensis it is relevant that we have found no arguments to treat this species as conspecific with A. abdominalis .

Distribution. Lanyu and Hsiaolanyu islands ( Taiwan). Hsiaolanyu is very small and deserted island which is very close to Lanyu Island. The size of island is about 1.75 km 2.

Figures

FIGURES 1 – 9. Habitus of Aulacophora species. 1. A. analis, Lanyu Island, male, dorsal view; 2. Ditto, ventral view; 3. A. analis, Lanyu Island, female, dorsal view 4. A. kotoensis, Lanyu Island, male, dorsal view; 5. Ditto, ventral view; 6. A. kotoensis, Lanyu Island, female, dorsal view; 7. Ditto, ventral view; 8. Lectotype of Crioceris abdominalis, dorsal view; 9. Ditto, ventral view.

FIGURES 62 – 72. Diagnostic characters of Aulacophora abdominalis (Fabricius). 62. Antenna, male; 63. Antenna, female; 64. Penis, dorsal view; 65. Penis lateral view; 66. Penis, lectotype of Crioceris abdominalis, details omitted; 67. Abdominal tergite VIII, male; 68. Abdominal tergite VIII, lectotype of Crioceris abdominalis; 69. Apex of abdominal ventrite V, female; 70. Gonocoxae; 71. Abdominal ventrite VIII, female; 72. Spermatheca.