Jacobyana centrafricana, Biondi, Maurizio & D'Alessandro, Paola, 2011

Biondi, Maurizio & D'Alessandro, Paola, 2011, Jacobyana Maulik, an Oriental flea beetle genus new for the Afrotropical Region with description of three new species from Central and Southern Africa (Coleoptera, Chrysomelidae, Alticinae), ZooKeys 86, pp. 47-59 : 51-53

Jacobyana centrafricana sp.n.

Type series.

Holotype ♂: ZAIRE [= REPUBLIC OF CONGO]: Nord Kivu, Lac Mugunga [~ 1°37'S, 29°32'E], 1520 m, 16.vii.1990, G. Carpaneto & S. Zoia leg. (BAQ).

Diagnosis.

Jacobyana centrafricana can be distinguished from Jacobyana bezdeki sp. n. and Jacobyana sudafricana sp. n. by the following features: the dorsal integuments being black with elytral apex clearly reddish and legs distinctly paler (reddish-brown in Jacobyana bezdeki sp. n.; more diffusely black in Jacobyana sudafricana sp. n.); the basal margin of the pronotum is slightly more sinuous (Figs 4, 10, 16); punctures of the ventral side of the body more densely impressed (Figs 5, 11, 18); the median lobe of the aedeagus in ventral view is clearly lanceolate, laterally with the maximum width about middle and with acutely rounded apex (Figs 6, 13, 20).

Description.

Holotype

♂. Dorsal integument (Fig. 8) entirely black with evident metallic reflection; elytral apex clearly reddish. Body roundish (LB = 2.66 mm), strongly convex. Maximum pronotal width at base (WP = 1.39 mm); maximum elytral width at basal third (WE = 1.88 mm).

Frons and vertex

(Fig. 9) with clearly shagreened and punctate surface, and distinct setiferous punctures; frontal tubercles subtriangular, blackish, very scarcely delimited, with shagreened surface; frontal grooves distally deep, particularly along ocular margin; interantennal space distinctly narrower than length of first antennomere, medially with two setiferous pores; frontal carina not raised; clypeus triangular with large setiferous punctures; labrum sub-rectangular, distally brownish; palpus yellowish; eye sub-elliptical, normally sized; antenna much shorter than body length (LAN = 1.00 mm; LAN/LB = 0.38), entirely pale, but with antennomeres 8-11 clearly blackened; antennomeres 1-2 and 7-11 clearly enlarged; length of each antennomere proportional to numerical sequence 23:14:20:10:9:8:14:14:16:16:20 (right antenna).

Pronotum

(Fig. 10) sub-trapezoidal, strongly transverse (LP = 0.68 mm; WP/LP = 2.06), laterally clearly and evenly rounded, basally as wide as elytra; basal margin distinctly sinuous, not bordered; lateral margin distinctly bordered, with anterior setiferous pore rearward at middle of pronotal side; punctures densely and uniformly distributed on shagreened and very finely punctulate surface; punctures small but clearly impressed. Scutellum very small, half-roundish, with sub-smooth surface, medially clearly depressed.

Elytra

moderately elongate (LE = 2.28 mm; LE/LP = 3.37), covering entire pygidium, laterally strongly arcuate, apically jointly rounded; punctures small but clearly impressed, arranged in 9 regular rows (+ 1 short scutellar row); surface sub-smooth with very finely and sparsely punctulation; interstriae flat; humeral callus very weakly prominent; macropterous metathoracic wings.

Legs

with blackish femur and tibia but with paler tarsi; hind tibia straight with no dentate external margin; apical spur of hind tibia short, reddish. First anterior and middle tarsomeres slightly dilated with adhesive setae on ventral side (Fig. 12).

Ventral side

(Fig. 11) blackish, with very dense and rather uniformly distributed setiferous punctures, sparser or absent in middle part of prosternum, metasternum and last abdominal sternite; last abdominal sternite without special preapical impressions.

Median lobe of aedeagus

(Fig. 13) short and robust (LAED = 0.93 mm; LE/LAED = 2.46), in ventral view clearly lanceolate, laterally with maximum width about at middle; apex acutely rounded; ventral sulcus very wide, moderately impressed, without any evident carinae or sulci but medially weakly protruding; dorsal sulcus obliterate; dorsal ligula well developed, apically acutely rounded; median lobe in lateral view basally strongly arcuate at basal third and slightly sinuous in distal half; apex slightly bent in ventral direction.

Etymology.

This species name refers to the geographic region where it lives and means "from Central Africa".

Distribution.

Republic of Congo (Nord Kivu) (Fig. 1). Central Afrotropical chorotype (CAT) ( Biondi and D’Alessandro 2006).

Ecological notes.

Host plant is unknown.