Dilatitibialis sylvia Canepari and Gordon, 2013

Canepari, Claudio, Gordon, Robert D. & Hanley, Guy A., 2013, South American Coccinellidae (Coleoptera), Part XV: systematic revision of Dilatitibialis Duverger (Coccidulinae; Hyperaspidini), Insecta Mundi 2013 (312), pp. 1-91 : 53-54

45. Dilatitibialis sylvia Canepari and Gordon , new species

Description. Male holotype. Length 3.6 mm, width 2.9 mm; body round, slightly elongate, convex. Dorsal surface with head, pronotum slightly alutaceous, somewhat dull, elytron, smooth, shiny. Color yellow except pronotum with large, black basomedian macula extended more than 1/2 distance to anterior margin, apex of macula emarginate with yellow medially, and broadly emarginate with yellow at anterolateral angle; elytron with sutural margin narrowly bordered with black, black border abruptly widened anterior to middle, large, black, median macula present in lateral 2/3 of elytron from humeral callus posteriorly to apical 1/6 ( Fig. 246 ); ventral surface with head, prosternum, meso- and metaventrite, and posterior femur dark brown; abdomen with ventrites 1-4 dark brown medially and yellowish brown in lateral 1/4, ventrites 5-6 brownish yellow. Head punctures small, separated by less than a diameter, each puncture about as large as 2 eye facets; pronotal punctures larger than head punctures, separated by a diameter or less; elytral punctures smaller than those on pronotum, separated by 1 to 2 times a diameter; metaventral punctures larger than those on elytron medially, separated by less than a diameter, slightly coarser and separated by less than a diameter toward lateral margin. Clypeus weakly emarginate apically, lateral angle rounded, surface with sparse, long pubescence. Eye canthus about 6 eye facets long, angled forward, apically rounded, yellow. Pronotum slightly narrowed from base to apex, basal and anterior angles abrupt, lateral margin feebly rounded, nearly straight, basal margin without trace of bordering line. Epipleuron narrow, grooved, weakly descending externally, deeply emarginate for reception of femoral apices. Protibia narrowly flanged, flange slightly narrower than remainder of protibia, outer margin weakly curved, smooth, sponda slightly extended beyond protibial flange. Carinae on prosternal process narrowly separated at apex, convergent to middle of prosternal process, then narrowly parallel to prosternal base. Metaventrite without setal tuft. Basal abdominal ventrite without setal tuft. Abdomen with primary pores laterally between ventrites 4-5 small, extended under apical 1/3 of 4th ventrite; postcoxal line on basal abdominal ventrite obliquely flattened along posterior ventrite margin, extended forward, ventrite with short pubescence and large, dense punctures; ventrites 2-4 pubescent throughout, punctures dense, small; 5th ventrite, densely, finely punctured in basal 2/3, apical 1/3 depressed, feebly depressed by primary pore laterally, without tubercle on each side of middle, apical margin broadly, weakly emarginate; 6th ventrite short, narrow, depressed medially, apical margin weakly emarginate, sparsely pubescent on each side of median depression, lateral angle abruptly rounded, surface densely punctured. Apical tergite with apex weakly emarginate. Genitalia with basal lobe slender, as long as paramere, asymmetrical, sides convergent from base to apex, apex nearly truncate; paramere wide, curved, Psc, apex with small, ventral projection ( Fig. 247, 248 ); sipho robust, strongly curved in basal 1/ 2, basal capsule large, inner arm short, slender, inner border emarginate, apex acute, outer arm longer and wider than inner arm, with accessory piece, basal border deeply, rectangularly emarginate ( Fig. 249, 250 ).

Female. Unknown.

Variation. Unknown.

Type material. Holotype male; Brazil, (second line of label illegible), S. Paulo, X.961, Werner, ex Coleccion M. Viana Arg. 028734, Coleccion J.E. Barriga, CHILE 077253. ( JEBC).

Remarks. Dilatitibialis sylvia is strikingly similar to D. cognata in dorsal color pattern but male genitalia of the 2 species are dissimilar in that the basal lobe of D. cognata i is not angulate to one side at apex and the paramere is wide medially. Dilatitibialis sylvia has elytral punctures smaller than pronotal punctures; the prosternal carinae not joined before the prosternal base; basal lobe of male genitalia angulate to one side at apex, and the paramere is slender medially.

Figures

Figures 235-250. 235-239) Dilatitibialis sherry. 235) Habitus. 236) Phallobase ventral. 237) Phallobase lateral. 238) Sipho. 239) Enlarged siphonal apex. 240-245) Dilatitibialis cognata. 240) Habitus.241) protibia.242) Phallobase ventral. 243) Phallobase lateral. 244) Sipho. 245) Enlarged siphonal apex. 246-250) Dilatitibialis sylvia. 246) Habitus. 247) Phallobase ventral. 248) Phallobase lateral. 249) Sipho. 250) Enlarged siphonal apex.