Dilatitibialis dawn 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 : 35-36

26. Dilatitibialis dawn Canepari and Gordon , new species

Description. Male holotype. Length 2.0 mm, width 1.6 mm; body rounded, slightly elongate, convex. Dorsal surface with head, pronotum weakly alutaceous, shiny, elytron smooth, shiny. Color dark brown except head yellow with narrowly brown clypeal apex, pronotum with lateral 1/5 and apical 1/3 yellow; elytron with 5 large, yellow spots arranged in rows of 2 each plus apical spot, mediolateral spot projected inward ( Fig. 140 ); ventral surface with mouthparts, prothoracic hypomeron, and legs yellow; abdomen yellowish brown. Head punctures small, separated by a diameter or less, each puncture about as large as an eye facet; pronotal punctures slightly larger than head punctures, separated by less than to twice a diameter; elytral punctures larger than on pronotum, separated by less than to 3 times a diameter; metaventral punctures as large as on elytron, separated by about 3 times a diameter medially, coarser, separated by less than to twice a diameter toward lateral margin. Clypeus weakly emarginate apically, lateral angle rounded, surface with sparse, long pubescence. Eye canthus about 5 eye facets long, angled forward, apically rounded, yellow. Pronotum narrowed from base to apex, basal and anterior angles abrupt, lateral margin weakly rounded, basal margin without trace of bordering line. Epipleuron narrow, grooved, weakly descending externally, deeply emarginate for reception of femoral apices. Protibia narrowly flanged, flange not as wide as remainder of protibia, outer margin curved, smooth, sponda strongly extended beyond protibial flange. Carinae on prosternal process narrowly separated at apex, convergent toward base, joined at basal 1/4 with single carina extended to basal margin of prosternum. Metaventrite without setal tuft. Basal abdominal ventrite without setal tuft. Abdomen with primary pores laterally between ventrites 4-5 small, extended under apical 1/4 of 4th ventrite; postcoxal line on basal abdominal ventrite flattened along posterior ventrite margin, extended forward, ventrite with sparse, short pubescence and large, sparse punctures medially; ventrites 2-4 pubescent throughout, punctures large medially, small, dense, becoming denser toward lateral margin; 5th ventrite coarsely, densely 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 broadly emarginate, sparsely pubescent on each side of median depression, lateral angle abruptly rounded, surface feebly punctured. Apical tergite lost. Genitalia with basal lobe short, wide, 3/4 as long as paramere, asymmetrical, sides parallel, apex rounded; paramere wide, curved, Psc, apex with small, ventral projection, trabes sinuate ( Fig. 141, 142 ); sipho robust, strongly curved in basal 1/2, basal capsule large, inner arm long, slender, weakly curved, apex rounded, outer arm wider and about as long as inner arm, with accessory piece, basal border broadly emarginate ( Fig. 143, 144 ).

Female. Similar to male except head entirely brown, pronotum brown except lateral 1/4 irregularly yellow. Genitalia with spermathecal capsule short, wide, curved medially, cornu slightly widened; bursal cap oval with 2 outer arms, apical strut short, widened from base to rounded apex ( Fig. 145 ).

Variation. Length 2.0 to 2.4 mm, width 1.6 to 1.8 mm. Discal spot on each elytron varies slightly from nearly round to somewhat elongate.

Type material. Holotype male; Brazil, Manáos , July 1935, B. V. Vredenburg, Brit. Mus 1935-615. ( BMNH) . Paratypes; 4, Brazil, Chapada, Acc. No. 2966, Nov. ( CMNH) .

Remarks. Dilatitibialis dawn is another small species with 5 spots on each elytron. Male genitalia with a short, wide basal lobe place it in a group with D. rita and other species, but the clypeus with narrow, brown apex, smooth brown elytron, and male genitalia will serve to distinguish it.

Figures

Figures 135-151. 135-139) Dilatitibialis rita. 135) Habitus. 136) Phallobase ventral. 137) Phallobase lateral. 138) Sipho. 139) Enlarged siphonal apex. 140-145) Dilatitibialis dawn. 140) Habitus. 141) Phallobase ventral. 142) Phallobase lateral. 143) Sipho. 144) Enlarged siphonal apex. 145) spermathecal capsule of Female genitalia. 146-151) Dilatitibialis scenica. 146) Habitus. 147) Phallobase ventral. 148) Phallobase lateral. 149) Enlarged siphonal apex. 150) Sipho. 151) Female genitalia.