Oides affinis Jacoby

Lee, Chi-Feng & Beenen, Ron, 2017, Revision of the Palaearctic and Oriental species of the genus Oides Weber, 1801 (Coleoptera: Chrysomelidae: Galerucinae), Zootaxa 4346 (1) : 6-8

Oides affinis Jacoby

( Figs 1A–1C , 2 )

Oides affinis Jacoby, 1883: 400 ( India: Neilgherries); Weise, 1924: 1 (catalogue); Maulik, 1936: 109 (redescription); Wilcox, 1971: 2 (catalogue); Vachon, 1980b: 207 (diagnosis); Takizawa, 1985b: 569 ( India: Animalai Hills); Takizawa, 1987: 524 ( India: Animalai Hills); Takizawa & Kimoto, 1990: 8 ( India: Coimbatore).

Types. Lectotype ( MCZC, sex undetermined), here designated, labeled: “ Neelghers . / S. India [h, w] // 1st Jacoby / Coll . [p, w] // Type [p] / 19415 [h, r]”. Number of paralectotypes is uncertain.

Redescription. Length 8.6–10.1 mm, width 5.0– 6.1 mm. General color ( Figs 1A–1C ) yellow; antennae yellow, antennomeres V–XI dark brown; elytra with one pair of large black spots at apical 1/3; abdominal ventrites black except apex of ventrite V; apices of tibiae and tarsi darker. Antennae filiform in males ( Fig. 2A ), antennomeres IV longest, VIII–X elongate, length ratios of antennomeres I–XI 1.0: 0.7: 0.9: 1.3: 1.0: 1.0: 0.9: 0.9: 0.9: 0.8: 1.2, length to width ratios of antennomeres I–XI 2.5: 2.0: 2.2: 3.3: 2.7: 2.6: 2.4: 2.5: 2.1: 2.1: 2.8; more slender in female ( Fig. 2B ), length ratios of antennomeres I–XI 1.0: 0.6: 0.8: 1.1: 0.8: 0.8: 0.8: 0.8: 0.7: 0.7: 1.1, length to width ratios of antennomeres I–XI 3.0: 1.6: 2.8: 3.7: 2.7: 2.6: 2.6: 2.7: 2.7: 2.6: 3.8. Pronotum transverse, 1.8x wider than long, disc with reticulate microsculpture and dense, coarse punctures, basolateral angles distinct, apico-lateral angles rectangular, lateral margins straight from near base to middle, apically narrowed from middle; apical margin weakly concave. Elytra oblong, widest at middle, 1.4x longer than wide, disc without reticulate microsculpture but with dense, coarse punctures; moderately convex, epipleurae near lateral margins, located 9/10 distance between suture and lateral margins. Tarsomeres I of front and middle legs typical in males. Penis ( Figs 2C–2E ) slender, 5.8x longer than wide; parallel-sided; bifurcate at apical 1/4, lateral process parallel, subapically narrowed, apices of lateral processes rounded and separated; tectum elongate, apex curved; with one pair of curved ridges at apical 1/4; slightly curved in lateral view, apices rounded; ventral surface deep and broad notch from apex to apical 2/5; endophallic sac without sclerites. Apical margin of abdominal ventrite V in female truncate. Gonocoxae reduced. Ventrite VIII ( Fig. 2F ) transverse, apical margin broadly rounded but medially depressed, with dense, long setae along apical margin; spiculum short. Receptacle of spermatheca ( Fig.

2G) as wide as pump, connected to pump; pump strongly curved; proximal spermathecal duct membranous, slender and short, sclerotized area at apex with scale-like depression.

Diagnosis. Members of this species are similar to those of O. palleata (Fabricius) and O. andrewesi Jacoby with reddish elytra and one pair of large black spots at apical 1/3, but they differ in possessing shining elytra and their relatively smaller size. The aedeagi of adult males of O. affinis are similar to those of O. andrewesi in possessing relatively shorter lateral processes but differ in possessing a well sclerotized tectum (reduced in O. andrewesi ) and abruptly narrowed bases of lateral processes (gradually anrrowed bases in O. andrewesi ) Host plants. Araceae : Amorphophallus paeoniifolius (Dennst.) Nicolson, 1977 . Pillai & Rajamma (1987) documented adults and larvae feeding on leaves and pseudostems of A. campanulatus (as a synonym of A. pseonifolius ). Fletcher (1914) found this species this species in rice paddies in Shoranore, Malabar, but was doubtful that it was a pest, and it seems unlikely to feed on rice.

Other specimens examined. INDIA. Tamil Nadu: 1♂ ( FREY), Anamalai Hillls, Cinchona, 3500 ft., X.1955, leg. P. S. Nathan; 1 ex. ( RMNH), same but with “ V.1964 ”; 1♂, 1♀ ( TCHU), same but with “ V.1966 ”; 8♂♂, 7♀♀ ( RMNH), same but with “ V.1968 ”; 1♂ ( TCHU), same but with “ V.1969 ”; 1♀ ( EUMJ), Anamalai Hillls, Madraw, V.1969, leg. P. S. Nathan; 4 exs. ( MNHUB), same locality, V.1968; 1 ex. ( NMPC), same but with “ 24.VI.1946 ”; 1♀ ( FREY), Nilgiri Hills, Moyar Camp, 3000 ft., V. 1954, leg. Nathan; Karnataka: 3 exs. ( JBCB), Cong distr., 10 km SE of Virajpe, near road Virajpe-Cannanote, 12°06’N 75°46’E, 500–900 m, leg. Z. Kejval & M. Trýzna; Kerala: 2 exs. ( MNHUB), Calicut Dist., Chembra Peak Area, leg. T. R. S. N.; 2 exs. ( JBCB), Ponmudi hill resort, 30 km NE of Trivandrum, 8°46’N 77°06’E, 1300–1500m, 28–30.VI.1999, leg. Z. Kejval & M. Trýzna.

Distribution. Southern India ( Fig. 3 ).

Figures

FIGURE 2. Diagnostic characters of Oides affinis Jacoby. 2A. Antenna, male; 2B. Antenna, female; 2C. Penis, dorsal view; 2D.Penis, lateral view; 2E. Penis, ventral view; 2F. Abdominal ventrite VIII; 2G. Spermatheca.

FIGURE 3. Distribution map of Oides affinis Jacoby (blue dots) and O. palleata (Fabricius) (red dots).

FIGURE1. Habitus of Oides affinis Jacoby and O. andrewesi Jacoby. 1A. O. affinis, dorsal view; 1B. Same, ventral view; 1C. Same, lateral view; 1D. O. andrewesi, dorsal view; 1E. Same, ventral view; 1F. Same, lateral view.