Serratitibia margaret, Gordon and Canepari, 2013

Gordon, Robert D., Canepari, Claudio & Hanley, Guy A., 2013, South American Coccinellidae (Coleoptera), Part XII: New name for Cyra Mulsant, review of Brachiacanthini genera, and systematic revision of Cleothera Mulsant, Hinda Mulsant and Serratitibia Gordon and Canepari, new genus, Insecta Mundi 2013 (278), pp. 1-150 : 93-94

73. Serratitibia margaret, Gordon and Canepari , new species

Description. Male holotype. Length 2.3 mm, width 1.7 mm; body slightly elongate, convex. Dorsal surface shiny, lacking alutaceous sculpture. Color yellow; pronotum with light brown, nebulous, mediobasal macula extended slightly more than 1/2 distance to apical pronotal margin, apex weakly emarginate with yellow; elytron black with 5 small, yellow spots arranged in transverse rows of two each plus one at apex, apical spot transversely oval ( Fig. 411 ); prosternum brownish yellow, meso–, metaventrites brown; abdomen yellow. Head punctures small, separated by less than diameter, each puncture as large as 3 eye facets; pronotal punctures as large as head punctures, separated by less than 2 times diameter; elytral punctures larger than pronotal punctures, separated by less than 4 times diameter. Clypeus weakly emarginate apically, nearly truncate, lateral angle abruptly rounded. Eye canthus 6 eye facets long, angled forward, apically rounded, yellow. Pronotum narrowed from base to apex, basal angle slightly rounded, anterior angle abruptly rounded, basal margin without bordering line. Epipleuron narrow, grooved, deeply emarginate for reception of femoral apices. Protibial flange about as wide as remainder of protibia, outer margin arcuate with several small teeth and large subbasal tooth, sponda extended beyond protibial border. Carinae on prosternal process narrowly separated at apex, nearly parallel, joined just before prosternal base. Metaventrite without setal tuft. Basal abdominal ventrite without median setal tuft. Abdomen without primary pores laterally between ventrites 4–5; postcoxal line on basal abdominal ventrite straight in basal 1/3, flat along apical margin of ventrite, apex extended forward. Abdominal ventrites with short, sparse pubescence, punctures on basal 2 ventrites separated by about diameter medially, becoming smaller and dense laterally, ventrites 3–5 densely punctured throughout; 5th ventrite depressed medially in apical 1/2, apical margin weakly emarginate medially, lateral angle of emargination pronounced with small tubercle bearing tuft of dense setae; 6th ventrite short, narrow, weakly depressed in apical 1/2, depression glabrous, without median tubercle, apical margin shallowly emarginate, angle on each side of emargination abruptly rounded, bearing small tuft of dense setae. Apical tergite short, narrow, apex weakly arcuate, surface densely, finely punctured. Genitalia with basal lobe shorter than paramere, evenly tapered from base to apex, apex obliquely rounded; paramere Unm type, widened apically, apex rounded. nearly truncate ( Fig. 412, 413 ); sipho robust, wide, curved in basal 1/2, basal capsule with inner arm short, wide, rectangular, apically truncate, outer arm slender, longer than inner arm, with accessory piece, basal border deeply emarginate ( Fig. 414, 415 ).

Female. Similar to male except head with vertex and most of frons dark brown, clypeus and anterior portion of frons yellow, pronotum with median black area apically truncate, extended nearly to anterior pronotal margin, elytron lacking yellow humeral spot. Genitalia with spermatheca elongate, wide, weakly curved, cornu slightly enlarged; bursal cap with 2 outer arms spaced to form wide triangle, inner arm weakly indicated, apical strut slightly widened apically ( Fig. 416 ).

Variation. Length 2.1–2.4 mm, width 1.6–1.7 mm. Size of elytral spot slightly variable, teeth on outer protibial margin vary from that described above to lacking large subbasal tooth, with small, even teeth throughout.

Type material. Holotype male; Guyana, Yarowkabra Forest Reserve , 6.v.2001, general beating along forest trail, R. G. Booth, BMNH (E) 2005-147 ( BMNH) . Paratypes; 7, 3, same data as holotype ( BMNH) ; 4, Guyana ix-ix.1992, Kurupukari , 4 o 40’N: 58 o 40’W, Malaise/ FIT, BMNH (E) 2006-132 ( BMNH) .

Remarks. Similar to other species with a similar elytral color pattern, S. margaret is distinguished by the light brown, nebulous pronotal macula, and by female genitalia having a triangular bursal cap with 2 widely spaced lateral arms.

Figures

Figures 411–428. 411–416) Serratitibia margaret. 411) Habitus. 412) Phallobase ventral. 413) Phallobase lateral. 414) Enlarged siphonal apex. 415) Sipho. 416) Female genitalia. 417–422) Serratitibia lisa. 417) Habitus. 418) Phallobase ventral. 419) Phallobase lateral. 420) Enlarged siphonal apex. 421) Sipho. 422) Female genitalia. 423– 428) Serratitibia nancy. 423) Habitus. 424) Phallobase ventral. 425) Phallobase lateral. 426) Enlarged siphonal apex. 427) Sipho. 428) Female genitalia.