Monolepta rubra ( Gyllenhal, 1808 )

Monolepta rubra ( Gyllenhal, 1808)

Figs 7–9 View Fig View Fig View Fig

Crioceris rubra Gyllenhal, 1808: 272 ( Chevrolat 1836: 407) .

= Luperodes javanensis Jacoby, 1887: 234 (syn. by Bowditch 1925: 253).

Type material. Crioceris rubra . Syntypes: 2 ex. “ Crioceris 81. 107 / rubra Gyllenh. Synon. Inf. 34 / Ind. Or. [?] Lund.” and another ex with “ Java Mellenb.” ( NHRS) .

Luperodes javanensis . Lectotype: “ Batavia / Luperodes javanensis Jac. Type / Type 18105 / Sythoff , Batavia, Java ” ( RMNH) . Paralectotype: 1 ex. same data as lectotype ( MCZH; Fig. 7 View Fig ). Type locality: 6º10′ S / 106º51′ E. Jacoby mentioned “two specimens” from one location in his original publication. GoogleMaps Both are available, and we designate a lectotype here to fix the name on a single specimen GoogleMaps .

Further material examined.– Indonesia. 2 ex., Nierst, Depok , 6º23′ S / 106º48′ E, 1899, Coll. Veth ( RMNH) GoogleMaps ; 33 ex., Java, Proepoek Tegal , 6º52′ S / 109º08′ E, IX.1909, Valck Lucassen ( RMNH) GoogleMaps ; 4 ex., Java, Slawi Tegal , 6º59′ S / 109º08′ E, IX.1909, Valck Lucassen ( RMNH) GoogleMaps ; 3 ex., Soemba Northcoast , 9º41′ S / 119º58′ E, IV.1930, W. C. van Heurn ( RMNH) GoogleMaps ; 5 ex., Java, Semarang , 6º58′ S / 110º25′ E, E. R Jacobson ( RMNH) GoogleMaps ; 1 ex., Bandong, 6º54′ S / 107º36′ E, Coll. Veth ( RMNH) GoogleMaps ; 2 ex., West Java, Krawang ds Randas-dengklok , 6º18′ S / 107º17′ E, 2.XI.1951, L.V.L ( RMNH) GoogleMaps . – Malaysia. 1 ex., Sarawak ( BMNH) ; 2 ex., Borneo, German Mission , 56358, Martin Schmidt ( MNHU) .

Redescription

Total length. 4.50–6.00 mm (mean 5.31 mm; n = 10).

Head. Entirely reddish-brown to blackish brown. Antenna slender, pale yellowish-brown, terminal antennomere usually dark-brown ( Fig. 8A View Fig ). Third antennomere slightly longer than second; ratio length of second to third antennomere 0.75–1.00 (mean 0.83); ratio length of third to fourth antennomere 0.38–0.56 (mean 0.42; Fig. 8B View Fig ).

Thorax. Pronotum finely punctuated, entirely reddish-brown to dark-brown, surface strongly convex. Pronotal width 1.40–1.75 mm (mean 1.58 mm), ratio length to width 0.63–0.65 (mean 0.64). Scutellum, mesoand metathorax dark brown. Elytron uniformly reddish to dark brown, rarely more yellowish, sometimes with fine darker outer margins ( Fig. 7b View Fig ). Elytral length 3.65– 4.30 mm (mean 3.94 mm), maximal width of both elytra together 2.50–3.00 mm (mean 2.77 mm), ratio of maximal width of both elytra together to length of elytron 0.68–0.72 (mean 0.70). Legs fulvous.

Abdomen. Dark brown.

Male genitalia. Median lobe lanceolate, slender, becomes slightly narrow towards apex. Tectum pointed. Few long and slender median spiculae, lateral spiculae club-shaped, lobe-liked at apex, ( Figs 8 View Fig Ca, Cb), ventral spiculae weakly sclerotized and hardly visible.

Female genitalia. Spermatheca with very small nodulus, middle part and cornu long, curved ( Fig. 8D View Fig ), two pairs of bursa sclerites with strong spines ( Fig. 8E View Fig ).

Diagnosis. Monolepta rubra is characterized by an entirely brownish-red to dark brown colouration. Monolepta rufipennis and M. sulawensis sp. nov. are most similar in colouration ( Figs 37A View Fig , 60A View Fig ). Total length of M. rubra (4.50–6.00 mm) is similar to M. rufipennis , while M. sulawensis sp. nov. is much smaller (3.70–4.25 mm), the pronotum of M. rubra is less broad (0.64–0.68) than in the other two species (0.60–0.64). M. rufipennis can be distinguished also by the contrast between black head and pronotum to the reddish elytra. Median lobe is slender and lacks the ventral spiculae in M. rubra and M. rufipennis , and both species are surely closely related, but the outer shape of the median lobe is much more slender in M. rubra ( Figs 8 View Fig Ca, 37Ca).

Distribution. Known from Java and adjacent islands ( Fig. 9 View Fig ), and Borneo.