Brachiacantha lynn Gordon and Canepari, 2014

Gordon, Robert D., Canepari, Claudio & Hanley, Guy A., 2014, South American Coccinellidae (Coleoptera), Part XVI: systematic revision of Brachiacantha Dejean (Coccinellinae: Hyperaspidini), Insecta Mundi 2014 (390), pp. 1-76 : 28

18. Brachiacantha lynn Gordon and Canepari , new species

Description. Male holotype. Length 3.0 mm, width 2.5 mm; body oval, convex. Dorsal surface with head slightly alutaceous, shiny, pronotum and elytron smooth, shiny. Color yellow except pronotum with short, narrow, brown basomedian macula extended about 1/2 distance to apical pronotal margin, anterior border of macula slightly extended forward on each side of middle; elytron dark brown with 3 large yellow spots, humeral spot widened apically, scutellar spot triangularly elongate, apical spot irregularly rounded ( Fig. 103 ); ventral surface with head, median 1/3 of prosternum, meso- and metaventrites brown; abdomen yellow except basal 3 ventrites slightly darker medially. Head punctures small, separated by a diameter or less, each puncture slightly larger than an eye facet; pronotal punctures larger than head punctures, separated by 1 to 2 times a diameter, elytral punctures larger than on pronotum, separated by 1 to 3 times diameter; metaventral punctures slightly smaller than on elytron medially, separated by a diameter or less, larger and separated by less than a diameter in lateral 1/4. Clypeus apically emarginate, lateral angle rounded, surface with sparse, long pubescence. Eye canthus about 6 eye facets long, straight, apically rounded, yellow. Pronotum narrowed from base to apex, basal and anterior angles abrupt, lateral margin weakly curved, basal margin without trace of bordering line medially. Epipleuron narrow, descending externally, deeply emarginate for reception of femoral apices. Protibia widely flanged, flange nearly as wide as remainder of protibia, outer margin straight, smooth, with small basal tooth about 1/10 as long as width of tibia at base, sponda not extended beyond protibial flange. Carinae on prosternal process narrowly separated at apex, convergent, joined at basal 1/6 of prosternum, single carina extended to prosternal base. Metaventrite without setal tuft. Basal abdominal ventrite without setal tuft. Abdomen with postcoxal line on basal abdominal ventrite flattened along apical ventrite margin, curved forward at apex, ventrite with sparse, long pubescence and small, dense punctures; ventrites 2–6 pubescent throughout, punctures fine, dense; ventrite 3 without cusp on each side of middle; 5th ventrite depressed in median 1/3, apex weakly emarginate; 6th ventrite medially depressed, apex shallowly emarginate. Apical tergite finely, densely punctured, apex slightly convex. Genitalia with basal lobe slightly longer than paramere, symmetrical, sides weakly curved from base to rounded apex; paramere Psc, curved, slightly widened from base to rounded apex, lower apical angle slightly produced (Fig.104,105); sipho robust, strongly curved in basal 1/2, with lateral alae at apical 1/6, basal capsule lightly sclerotized, inner arm long, narrow, angled forward, apex broadly, weakly bifid, outer arm as long as and wider than inner arm, with accessory piece, basal border broadly, shallowly emarginate ( Fig. 106, 107 ).

Female. Unknown.

Variation. Unknown.

Type material. Holotype male; ( Colombia) Cordilre. Centr., (Colombie), R. O. Thieme 1877. ( ZMHB).

Remarks. Brachiacantha lynn is one of the larger species in the juanita group, and is distinguished by 3 large yellow spots on each elytron, scutellar spot triangular, apical spot irregularly rounded and occupying most of apical declivity.

Figures

Figures 88–107. 88–94. Brachiacantha octopustulata. 88) Habitus. 89) Phallobase ventral. 80) Phallobase lateral. 91) Sipho. 92) Enlarged siphonal apex lateral. 93) Enlarged siphonal apex dorsal. 94) Female genitalia. 95–102. Brachiacantha loricata. 95) Habitus. 96) Phallobase ventral. 97) Phallobase lateral. 98) Sipho. 99) Enlarged siphonal apex lateral. 100) Enlarged siphonal apex dorsal. 101) Enlarged siphonal apex dorsal. 102) Female genitalia. 103–107. Brachiacantha lynn. 103) Habitus. 104) Phallobase ventral. 104) Phallobase lateral. 106) Sipho. 107) Enlarged siphonal apex.