Mimastra polita Jacoby, 1889

Bezděk, Jan, 2009, Revisional study on the genus Mimastra (Coleoptera: Chrysomelidae: Galerucinae): Species with unmodified protarsomeres in male. Part 1., Acta Entomologica Musei Nationalis Pragae 49 (2), pp. 819-840 : 826-828

Mimastra polita Jacoby, 1889

( Figs. 9 , 11–12 , 27 )

Mimastra polita Jacoby, 1889: 211 (original description).

Mimastra polita: ALLARD (1890) : 84 (key); MAULIK (1936): 532 (key); WILCOX (1973): 484 (catalogue); MEDVEDEV (2002): 256 (designation of lectotype).

Mimastra (Mimastra) polita: WEISE (1924) : 125 (catalogue).

Type locality. ‘Tenasserim, Thagatà’ [= Thagyettaw, 13°45´N 98°09´E, Myanmar].

Type material. LECTOTYPE (designated by MEDVEDEV (2002)): J, ‘Tenasserim / Thagatà / Fea. Apr. 1887 [w, p] // polita / Jac. [w, h] // Mimastra / polita Jac. [blue label, h] // SYNTYPUS [p] / Mimastra / polita / Jacoby, 1889 [orange label, h] // Museo Civico / di Genova [w, p] // Hololectotype / Mimastra / polita Jac. / L. Medvedev design. [red label, h]’ ( MSNG). PARALECTOTYPE: 1 ♀, ‘Tenasserim / Thagatà / Fea. Apr. 1887 [w, p] // SYNTYPUS [p] / Mimastra / polita / Jacoby, 1889 [orange label, h] // Museo Civico / di Genova [w, p]’ ( MSNG). A colour photo of one paralectotype (unsexed, probably male) and its labels deposited in MCZ is available online at: http://mcz-28168. oeb.harvard.edu/mcztypedb.htm. The specimen bears the following labels: ‘Tenasserim / Thagatà / Fea. Apr. 1887 [w, p] // Mimastra / polita Jac. [blue label, h] // 1st Jacoby / Coll. [w, p] // Type [p] 18179 [red label, h]’.

Additional material examined. MYANMAR: Tenasserim, 10.iv.1994, 3 JJ 1 ♀, without collector’s name ( NMEG). VIETNAM: VINH PHU prov.: 23 JJ 6♀♀, Tam Dao, 70 km NW of Hanoi, 21°27´N 105°39´E, 900–1200

m, 11.–17.v.1996, P. Spáčil leg. ( JBBC). THAILAND: MAE HONG SON prov: 1 J, Kiwiom pass near Soppong , 19°26´N 98°19´E, 1400 m , 23.vi.–2.vii.2002, R. & H. Fouqué leg. ( JBBC). INDIA: MEGHALAYA: 1 J, ca 8 km N of Shillong , 25°38´N 91°54´E, 1200m, 7.–9.v.2004, R. Businský leg. ( NMPC) ; 1 J, SW of Cherrapunjee , 25°13–14´N 91°40´E, 900m, 1.–24.v.2005, L. Dembický leg. ( BMNH) .

Differential diagnosis. Dorsum yellow, extreme apices of elytra black. Ventral side yellow, metasternum and abdomen black. Legs yellow, femora and tibiae with narrow black stripe on outer side, middle and especially hind tibiae gradually darkened to apex, tarsi black. Mimastra polita can be distinguished from similar species ( M. badia , M. pallida and M. submetallica ) mainly by the unusual structure of the aedeagus, which is relatively thin and its extreme apex is distinctly curved. The aedeagus of the lectotype is weakly sclerotized ( Fig. 11 ); a fully sclerotized aedeagus is shown in Fig. 12 . Spermatheca as in Fig. 9 . Body length: males 7.20–8.15 mm (lectotype 7.20 mm); females 7.85–9.10 mm.

Distribution. Myanmar ( JACOBY 1889, present paper), Vietnam, Thailand, India: Meghalaya (present paper).

Comments. Two males from India, Meghalaya, have a large black apical spot on each elytron but the aedeagus is identical with that of the specimens from other regions.

Figures

Figs. 5–9. Spermatheca. 5 – Mimastra badia Kimoto, 1989; 6 – M. fortipunctata Maulik, 1936; 7 – M. maai Gressitt & Kimoto, 1963; 8 – M. pallida Jacoby, 1896; 9 – M. polita Jacoby, 1889. Scale bars: 0.5 mm.

Figs. 10–13. Aedeagus (a – dorsal view; b – lateral view). 10 – Mimastra pallida Jacoby, 1896; 11 – M. polita Jacoby, 1889 (lectotype); 12 – M. polita (male from India: Meghalaya); 13 – M. submetallica Jacoby, 1884. Scale bars: 1 mm.

Figs. 26–29. Habitus. 26 – Mimastra pallida Jacoby, 1896 (paralectotype, unsexed, 5.25 mm); 27 – M. polita Jacoby, 1889 (male, 8.40 mm); 28 – M. submetallica Jacoby, 1884 (male, 7.15 mm); 29 – M. sumatrensis Jacoby, 1884 (male, 8.45 mm).