Serratitibia susan 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 : 92-93

72. Serratitibia susan Gordon and Canepari , new species

Description. Male holotype. Length 2.0 mm, width 1.5 mm; body slightly elongate, convex. Dorsal surface with head and pronotum faintly alutaceous, shiny, elytron lacking alutaceous sculpture, shiny. Color yellow; pronotum with black, basomedial macula wide basally, extended anteriorly 2/3 distance to pronotal apex at middle, 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 slightly oval, nearly round ( Fig. 407 ); prosternum, mesoventrite yellow, metaventrite dark brown; abdomen yellow. Head punctures small, separated by less than diameter, each puncture as large as 1–2 eye facets; pronotal punctures smaller than head punctures, separated by less than 3 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 about 6 eye facets long, angled forward, apically rounded, yellow. Pronotum narrowed from base to apex, basal angle broadly rounded, anterior angle abruptly rounded, lateral margin straight, basal margin without bordering line. Epipleuron narrow, nearly flat, slightly grooved, deeply emarginate for reception of femoral apices. Protibial flange wider than remain- der of protibia, outer margin arcuate with about 6 distinct teeth, sponda extended beyond protibial border. Carinae on prosternal process widely separated at apex, nearly parallel, joined 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, with median tubercle, apical margin widely, shallowly emarginate, angle on each side of emargination abruptly rounded, bearing small tuft of dense setae. Apical tergite short, narrow, apex weakly emarginate, surface densely, finely punctured. Genitalia with basal lobe shorter than paramere, tapered to rounded apex; paramere Unm type, short, strongly widened apically, apex slightly rounded, ventral and lateral views Fig. 408 ; sipho robust, curved in basal 1/2, basal capsule with inner arm elongate, slender, apex rounded, outer arm slightly longer than inner arm, with accessory piece, basal border weakly emarginate, enlarged apex and entire sipho ( Fig. 409 ).

Female. Similar to male except head with vertex and triangular, median frontal area black, pronotum with median black area apically truncate, reaching anterior pronotal margin, elytron lacking yellow humeral spot. Genitalia with spermatheca short, slender, strongly curved, cornu slightly enlarged; bursal cap with 2 outer arms, apical strut narrow, laterally flattened ( Fig. 410 ).

Variation. Length 2.0– 2.5 mm, width 1.5–2.0 mm. Specimens not designated as paratypes differ in having a black ventral surface and male genitalia with basal capsule of sipho slightly differently shaped.

Type material. Holotype male; Peru, Cuzco, San Pedro Manu , 1500 m., 16/ 18-VI-2006, Leg. R. Westerduijn, Montane evergreen forest ( GGC) . Paratypes; 2, same data as holotype ( GGC) .

Other specimens. Peru. 4. Same data as holotype ; San Martin, 24-25-VI-2006, leg. R. Westerduijn, vicinity of Calzada, woodlands. ( GGC) .

Remarks. Dorsally this species resembles S. satipoensis , but male genitalia have apically rounded parameres and the basal lobe is more constricted in the apical 1/2. It is most easily recognized by the pale ventral color, triangular black area of female head, and short, strongly curved spermathecal capsule of female genitalia.

Figures

Figures 396–410. 396–401) Serratitibia ruby. 396) Habitus. 397) Phallobase ventral. 398) Phallobase lateral. 399) Enlarged siphonal apex. 400) Sipho. 401) Female genitalia. 402–406) Serratitibia helen. 402) Habitus. 403) Phallobase ventral. 404) Phallobase lateral. 405) Enlarged siphonal apex. 406) Sipho. 407–410) Serratitibia susan. 407) Habitus. 408) Phallobase ventral and lateral. 409) Sipho and enlarged siphonal apex. 410) Female genitalia.