Dercetina azumai
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Ordo: Coleoptera
Familia: Chrysomelidae
Genus: Dercetina
Name
Dercetina azumai Kimoto & Gressitt, 1966 – Wikispecies link – Pensoft Profile
- Dercetina azumai Kimoto & Gressitt, 1966: 534 (Japan: Iriomote island); Kimoto 1969[1]: 66 (Taiwan); Kimoto 1989a[2]; 260 (Taiwan).
Type series
Dercetina azumai: Holotype ♀ (KUEC): “RYUKYU IS. Iriomote I. Ushiku-mori 11.III.1964 / S. Kimoto Collector / Japan-U. S. Co-op. Sci. Programme (yellow label) / HOLOTYPE DERCETINA AZUMAI J. L. GRESSITT (red label)”.
Material examined
TAIWAN: 1♂, Kaoshiung, Chuyunshan trail, 1.III.2009, leg. U. Ong (TARI); 1♀, Kaoshiung, Taoyuan, 3.VII.2009, leg. S.-F. Yu (TARI); 5♂♂, 12♀♀, Kaoshiung, Tengchih (= Shihshan trail), 2-5.VI.2008, leg. C.-F. Lee (TARI); 3♂♂, 16♀♀, same locality, 2.X.2008, leg. M.-H. Tsou (TARI); 6♀♀, same locality, 1–3.X.2008, leg. M.-H. Tsou (TARI); 1♂, 1♀, same locality, 5.II.2009, leg. M.-H. Tsou (TARI); 1♂, 1♀, same locality, 26.V.2009, leg. C.-F. Lee (TARI); 1♂, same locality, 4.VII.2011, leg. M.-H. Tsou (TARI); 1♀, Pingtung, Jinshuiying, 12.IV.2012, leg. C.-F. Lee (TARI); 2♀♀, Pingtung, Tahanshan, 22.I.2009, leg. S.-F. Yu (TARI); 1♀, same locality, 24.I.2009, leg. M.-H. Tsou (TARI); 1♀, same locality, 8.V.2009, leg. U. Ong (TARI); 1♂, same locality, 21.VII.2009, leg. J.-C. Chen (TARI); 6♂♂, 14.VIII.2011, leg. Y.-T. Wang (TARI); 1♀, same locality, 6.VI.2012, leg. C.-F. Lee (TARI); 1♂, same locality, 19.VII.2012, leg. C.-F. Lee (TARI); 2♂♂, Taitung, Motien, 23.VI.2010, leg. S.-F. Yu (TARI); 1♂, same locality, 19.VI.2011, leg. C.-F. Lee (TARI).
Diagnosis
Dercetina azumai is similar to Dercetina shirozui with metallic green elytra but differs by the yellowish brown head, prothorax, meso- and metathoracic ventrites (in contrast with metallic green head, prothorax, meso- and metathoracic ventrites in Dercetina shirozui).
Redescription
Color (Figs 1–2) yellowish brown except eye black; antennomeres III-XI dark brown; elytron metallic green or blue. Head shagreened and impunctate. Pronotum transverse, 1.4–1.5 times wider than long, disc with a pair of deep fovea, and scattered prominent and fine punctures; lateral margin sinuate, narrowed posterior, anterior margin slightly concave, posterior margin slightly rounded. Elytra more or less widened posterior, apex convergent rounded, 1.6–1.7 times longer than wide, disc with densely prominent punctures; epipleurae with scattered prominent prunctures. Male. Length 4.9–5.6 mm, width 2.1–2.4 mm. Antenna filiform (Fig. 5), ratio of length of antennomeres III to XI about 1.0: 1.6: 1.6: 1.6: 1.6: 1.3: 1.2: 1.1: 1.4; ratio of length to width of antennomeres III to XI about 3.9: 6.4: 6.1: 6.0: 6.2: 5.1: 4.8: 4.1: 5.1. Penis (Fig. 7) extremely slender, about 8.9 times longer than wide, parallel-sided, basally widened, apex pointed; tectum membranous, with scattered stout membranous setae; weakly curved in lateral view (Fig. 8); endophallic sclerite elongate, about 0.7 times as long as penis, apex curved in lateral view, bifurcate, with a cluster of dense setae near apex; a pair of hooked dorsal slclerite connected at apical 1/5, an elongate sclerite between dorsal sclerite and ventral sclerite, connected at apical 1/3; ventral sclerite with base deeply bifurcate. Female. Length 5.5–6.8 mm, width 2.6–3.3 mm. Ratio of length of antennomeres III to XI about 1.0: 1.7: 1.6: 1.6: 1.5: 1.4: 1.3: 1.3: 1.5; ratio of length to width of antennomeres III to XI about 3.8: 6.3: 6.1: 5.9: 5.6: 5.1: 4.9: 4.9: 5.7 (Fig. 6). Sternite VIII (Fig. 9) weakly sclerotized laterally and apically, with scattered setae along lateral and apical margin, spiculum extremely slender. Spermathecal receptaculum (Fig. 11) weakly swollen; pump narrow and moderately curved, apex broadly rounded; spermathecal duct long, strongly curved, deeply projecting into receptaculum. Gonocoxae (Fig. 10) widely connected at middle, about 4.4 times longer than wide, curved inwards at apical 1/3, with one long seta at apical 1/3, eleven setae at apex.
Host plants
Myrsinaceae: Embelia lenticellata Hayata; Saxifragaceae: Hydrangea angustipetala Hayata.
Distribution
Japan (Iriomote island) and Taiwan. This species occurs in mountains (1000–2000 m) of southern Taiwan (Fig. 12) but locally abundant.
Taxon Treatment
- Lee, C; Bezděk, J; 2013: Revision of the genus Dercetina from Taiwan and their similar species, with description of a new species from Myanmar (Insecta, Chrysomelidae, Galerucinae) ZooKeys, 323: 1-33. doi
Other References
- ↑ Kimoto S (1969) Notes on the Chrysomelidae from Taiwan II. Esakia 7: 1-68.
- ↑ Kimoto S (1989a) The Taiwanese Chrysomelidae (Insecta: Coleoptera) collected by Dr. Kintaro Baba, on the occasion of his entomological survey in 1983 and 1986. Kurume University Journal 38: 237-272.
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