Paleosepharia amiana ( Chujo ) Lee, Chi-Feng, 2018

Lee, Chi-Feng, 2018, The genus Paleosepharia Laboissiere, 1936 in Taiwan: review and nomenclatural changes (Coleoptera, Chrysomelidae, Galerucinae), ZooKeys 744, pp. 19-41 : 21-23

Paleosepharia amiana ( Chujo) comb. n. Figs 1 A– 1C, 2

Monolepta amiana Chûjô, 1962: 136 (Taitung); Kimoto 1969: 47 (Nantou); Kimoto 1991: 13 (Kaohsiung); Kimoto and Chu 1996: 78 (catalogue); Kimoto and Takizawa 1997: 385 (catalogue); Beenen 2010: 482 (catalogue); Yang et al. 2015: 266 (catalogue); Lee et al. 2016: 108 (food plants).

Type material.

Depository of the single female holotype is unknown. Chûjô (1962) indicated that most specimens were deposited at the TARI except for some in his collection. Although some specimens were found at the KUEC, the type of this species was not among them.

Other material examined (n = 82). Pingtung: 1♀ (TARI), Jinshuiying [浸水營], 12.VIII.2010, leg. J.-C. Chen; 1♀, Tahanshan [大漢山], 4.X.2010, leg. J.-C. Chen; 6♀♀ (TARI), same locality, 22.IX.2011, leg. J.-C. Chen; 3♂♂, 11♀♀ (TARI), same locality, 3.IX.2012, leg. Y.-T. Chung; 1♂ (TARI), same locality, 13.IX.2012, leg. J.-C. Chen; 1♂, 1♀ (TARI), same locality, 14.IX.2012, leg. Y.-T. Chung; 1♂ (TARI), same locality, 30.VII.2013, leg. B.-X. Guo; 1♀ (TARI), same locality, 17.VIII.2013, leg. J.-C. Chen; 1♂, 2♀♀ (TARI), same locality, 3.IX.2013, leg. Y.-T. Chung; 7♀♀ (TARI), same locality, 11.IX.2013, leg. Y.-T. Chung; 2♂♂, 8♀♀ (TARI), same locality, 24.IX.2013, leg. Y.-T. Chung; 2♂♂, 3♀♀ (TARI), same locality, 1.X.2013, leg. Y.-T. Chung; 1♀ (TARI), same locality, 8.X.2013, leg. Y-T. Chung; 4♀♀ (TARI), same locality, 25.X.2013, leg. Y.-T. Chung; 1♀ (TARI), same locality, 16.XII.2013, leg. Y.-T. Chung; 2♂♂ (TARI), same locality, 19.VII.2014, leg. W.-C. Liao; 2♀♀ (TARI), same locality, 17.VI.2016, leg. Y.-T. Chung; 1♂ (TARI), same locality, 6.VIII.2016, leg. Y.-T. Chung; Taipei: 2♀♀ (TARI), Manyuehyuan [滿月圓], 3.VII.2010, leg. H. Lee; 1♀ (TARI), same but with “8.VII.2010”; 1♀ (TARI), same but with “8.IV.2010”; 1♀ (TARI), same but with “7.VIII.2014”; Taitung: 2♀♀ (TARI), Lichia trail [利嘉林道], 15.VII.2014, leg. Y.-T. Chung; 1♂ (TARI), same locality, 17.VII.2014, leg. Y.-T. Wang; 1♀ (TARI), same locality, 25.VII.2015, leg. Y.-T. Chung, P.-H. Kuo & S.-P. Wu; 1♂ (TARI), same locality, 1.VII.2016, B.-X. Guo; Taoyuan: 2♀♀ (TARI), Hsiaowulai [小烏來], 29.IX.2009, leg. M.-H. Tsou; 4♀♀ (TARI), same locality, 10.X.2009, leg. M.-H. Tsou; 1♂, 1♀ (TARI), Sankuang [三光], 14.VII.2010, leg. H. Lee.

Diagnosis.

Members of Paleosepharia amiana are similar to those of P. excavata , P. formosana , and P. yasumatsui with black stripes along the outer margins of yellow elytra. However, this species is easily recognized by the presence of only one transverse black band on the elytra (two transverse bands in others). The aedeagus of male P. amiana is similar to that of P. nantouensis in possessing a relatively narrow penis (more than 6.5 times longer than wide; less than 6.0 times in other species), acute apex of tectum (bifurcate apex in other species), and one pair of elongate and apically curved spiculae (lacking such spiculae in other species). It differs by the broader tectum (broader than penis; narrower than penis in P. nantouensis ) and different sizes of the two pairs of hooked spiculae (same sizes in P. nantouensis ).

Description.

Males. Length 6.0-6.5 mm, width 3.3-3.4 mm. General color reddish brown (Fig. 1 A– 1B); antennae except two basal antennomeres, scutellum, tibiae, and tarsi black; elytra yellow, with wide black stripe along lateral margins and suture extend ing to apex, and one transverse, wide black band at basal 2/3. Antenna (Fig. 2A) filiform, ratio of length of antennomeres I to XI 1.0: 0.3: 0.5: 0.9: 0.9: 0.9: 0.9: 0.9: 0.8: 0.7: 0.8; ratio of length to width from antennomere I to XI 4.6: 1.9: 2.8: 5.0: 5.1: 5.1: 5.7: 6.0: 6.5: 5.7: 7.1. Pronotum 1.86-1.97 times wider than long; lateral margins slightly curved, basal margin slightly curved, apical margin slightly concave; disc with reticulate microsculpture and dense, minute punctures. Elytra 1.34-1.45 times longer than wide; lateral margins curved, widest behind middle; disc with one pair of oblique depressions starting from suture at scutellum, longitudinal ridge present inside each depression and along suture; disc with dense, minute punctures; apex truncate. First tarsomeres of front legs strongly swollen and dorso-ventrally flattened. Penis (Fig. 2 C–E) extremely slender, 7.3 times longer than wide; parallel-sided, basally widened from middle, apically tapering; tectum elongate from basal 1/4 to apical 1/5, widest at midpoint and wider than penis, apically tapering, apex acute; moderately recurved at middle and near apex in lateral view; ventral surface with lateral areas membranous. Endophallic spiculae complex (Fig. 2F) with one pair of extremely elongate spiculae, apices curved at middle; two pairs of elongate hooked spiculae, one pair longer and curved inwards, the other pair shorter and curved outwards; one pair of longitudinal rows of elongate, apically curved setae near base; one row of elongate, apically tapering setae at sides behind middle.

Females. Length 5.6-6.5 mm, width 3.3-3.5 mm. Similar to male (Fig. 1C) but elytra lacking oblique depressions; first tarsomeres of front legs normal; ratio of length of antennomeres I to XI (Fig. 2B) 1.0: 0.3: 0.5: 0.9: 0.9: 0.8: 0.9: 0.8: 0.8: 0.7: 0.7; ratio of length to width from antennomere I to XI 4.8: 2.0: 3.7: 5.6: 5.6: 5.9: 6.7: 6.2: 7.2: 6.4: 6.7. Gonocoxae (Fig. 2J) slender, tightly conjunct from apical 1/3 to base; each gonocoxa with eight setae from apical 1/6 to apex, apex truncate. Ventrite VIII (Fig. 2G) weakly sclerotized except apex, with several short setae at apex, and several long setae at sides, spiculum elongate. Spermathecal receptaculum (Fig. 2I) swollen; pump extremely slender and curved; sclerotized spermathecal duct slender. Bursa sclerites (Fig. 2H) elongate and apically tapering, with stout teeth along lateral margin at base; slightly curved in lateral view.

Food plants.

Melastomataceae : Blastus cochinchinensis Lour.; Sapindaceae : Koelreuteria henryi Dummer; Fagaceae : Castanopsis formosana (Skan) Hayata ( Lee et al. 2016).

Distribution.

Endemic to Taiwan.