Serratitibia rebecca 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 : 41-42

17. Serratitibia rebecca Gordon and Canepari , new species

Description. Male holotype. Length 2.5 mm, width 2.1 mm; body broadly oval, convex. Dorsal surface shiny, lacking alutaceous sculpture. Color yellow; pronotum with short, narrow, brown basomedial macula with anterior border broadly, deeply emarginate, and 2 pale yellow, oblique triangular spots on disc; elytron brown with 5 large yellow spots occupying nearly all of elytron, separated by narrow brown lines, forming almost a reticulate pattern ( Fig. 144 ); venter of head, prosternum reddish yellow, meso–, metaventrites reddish brown; abdomen reddish yellow. Head punctures small, separated by less than diameter, each puncture as large as 1 eye facet; pronotal punctures equal in size to head punctures, separated by less than 2 times diameter; elytral punctures as large as on pronotum, separated by less than 2 times diameter; metaventral punctures larger than on elytra, separated by diameter or less medially, larger laterally. Clypeus weakly emarginate apically, lateral angle abruptly rounded. Eye canthus about 5 eye facets long, slightly angled forward, apically rounded, yellow. Pronotum narrowed from base to apex, basal angle broadly rounded, anterior angle abruptly rounded, lateral margin rounded, basal margin without trace of bordering line. Epipleuron wide, distinctly grooved, deeply emarginate for recep- tion of femoral apices. Protibial flange wider than remainder of protibia, outer margin arcuate, with about 10 small teeth from base to apex, sponda extended beyond protibial border. Carinae on prosternal process narrowly separated at apex, parallel, joined at basal 1/6 of prosternum. Metaventrite without setal tuft. Basal abdominal ventrite with median setal tuft. Abdomen with primary pores laterally between ventrites 4–5 large, extended under apical 1/3 of ventrite 4; postcoxal line on basal abdominal ventrite angled to posterior ventrite margin, rounded along margin, apex extended forward. Abdominal ventrites 1–4 with short, sparse pubescence, punctures on basal 3 ventrites small, separated by diameter or less, becoming smaller and dense laterally, ventrites 3–5 densely punctured throughout; 5th ventrite depressed medially in apical 1/2, apical border weakly emarginate medially, lateral angle of emargination with small tubercle bearing tuft of dense setae; 6th ventrite narrow, deeply depressed medially, depression glabrous, without median tubercle, apical margin shallowly emarginate, angle on each side of emargination bearing tuft of setae. Apical tergite short, narrow, apex truncate, surface densely, finely punctured. Genitalia with basal lobe 5/6 as long as paramere, sides weakly convergent, apex obliquely rounded; paramere Unm type, wide, widened apically, apex rounded ( Fig. 145, 146 ); sipho robust, curved in basal 2/3, basal capsule with inner arm long, slender, apex obliquely truncate, outer arm as long as inner arm, wide, straight, with accessory piece, basal border broadly, deeply emarginate ( Fig. 147, 148 ).

Female. Unknown.

Variation. Length 2.5–2.6 mm, width 2.0– 2.1 mm. Elytral spots discrete or narrowly connected.

Type material. Holotype male; ( Brazil), Corumba , Matt ( Matto ) Grosso, Nunenmacher collection ( CAS) . Paratypes; 2, same data as holotype ( CAS) .

Remarks. Serratitibia rebecca is a miniature version of S. anna with a nearly identical elytral color pattern, but lacks the pronotal basomedial macula. Serratitibia rebecca is much smaller, the male has a yellow clypeus, and it has a Brazilian type locality, but the similarity in appearance is remarkable. These species are distinctive within the genus, not closely resembling any other presently known taxon.

Figures

Figures 137–154. 137–143) Serratitibia anna. 137) Habitus. 138) Protibia. 139) Phallobase ventral. 140) Phallobase lateral. 141) Enlarged siphonal apex. 142) Sipho. 143) Female genitalia. 144–148) Serratitibia rebecca. 144) Habitus. 145) Phallobase ventral. 146) Phallobase lateral. 147) Enlarged siphonal apex. 148) Enlarged siphonal apex. 149–154) Serratitibia tortuosa. 149) Habitus. 150) Phallobase ventral. 151) Phallobase lateral. 152) Enlarged siphonal apex. 153) Sipho. 154) Female genitalia.