Beltia gorgona Flowers,

Flowers, R. Wills, 2018, A review of the genus Beltia Jacoby (Chrysomelidae: Eumolpinae: Eumolpini), with descriptions of fourteen new species from Costa Rica, Panama, and northwestern South America, Insecta Mundi 672, pp. 1-43: 10-11

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Beltia gorgona Flowers

new species

Beltia gorgona Flowers  , new species

Figures 22View Figures 18–26, 46View Figures 42–49, 62View Figures 60–66, 78View Figures 78–79

Description of male holotype. Body ovate, length 6.3 mm ( Fig. 22View Figures 18–26). Head, pronotum, and elytra metallic bluish green with purple-coppery reflexion; underside and legs glossy bluish green; anten- nomeres testaceous.

Head. Clypeus densely punctate, punctures separated by distance less than their diameters. Frons strongly punctate, punctures separated by distance greater than their diameters; vertex with a distinct median impressed line, finely punctate; antennal calli smooth, weakly swollen.

Thorax. Prothorax distinctly wider than long, L/W = 0.57; pronotum with punctures separated by distance greater than their diameters; surface between punctures glossy, with numerous punctulae. Prosternum punctate, with scattered short white setae; posterior margin of intercoxal process concave, width of intercoxal process 1.07× diameter of procoxa. Proepimeron with surface wrinkled and with scattered punctures in basal third. Mesosternum with anterior edge convex, surface smooth and sparsely punctate. Metasternum smooth, metepisternum with surface finely alutaceous.

Elytra. Evenly punctate, punctures separated by distance greater than their diameters; width across humeri 1.22× width across pronotum.

Abdomen. Sterna with numerous short setae and longer setae in submedian areas of sterna III–VI, surface of segments alutaceous. Sternum VII with lateral margins smooth, a weak depression in center. Terga heavily sclerotized, spicules on segments II and III small, segments V and VI shagreened.

Genitalia. Median lobe ( Fig. 46aView Figures 42–49) in lateral view with prominent lateral flange; in en-face view lateral margins robust and converging, apex tapered to a slightly asymmetrical projection ( Fig. 46cView Figures 42–49). Apex of endophallus ( Fig. 46bView Figures 42–49) with a field of small spicules and a small, curved apical sclerite.

Female allotype. Body oval; length 7.4 mm (range 6.8–7.2 mm); head, pronotum, and elytra glossy metallic golden green with purple reflexion on antennal calli and margins of pronotum and elytra. Scutellum, underside, and legs metallic purple.

Head. Frons and clypeus less densely punctate than male, antennae similar to male but with apical antennomere slightly darker.

Thorax. Shape and punctation of pronotum as in male; prosternum and proepimeron similar to male. Mesosternum more strongly wrinkled than in male. Legs similar in form to male, and basal tarsomere of fore- and middle legs not expanded.

Elytra. Punctation as in male.

Abdomen. Sterna with numerous white setae, longer in middle third of sterna III–VI.

Genitalia. Segments VIII–XI forming a moderately elongate (L/W = 4.7) ovipositor ( Fig. 62aView Figures 60–66). Sternum VIII with long, wire-like basal apodeme with apical end widened and less defined. Spermatheca ( Fig. 62bView Figures 60–66) with bulbous receptacle.

Specimens examined. COLOMBIA: Valle de Cauca Prov. (1♂, 2♀). Male holotype labeled: COLOM- BIA Valle de Cauca , PNN Farallones de Cali Anchicaya 3°26′N 76°48′W 730m Malaise 8/14/01 8/28/01 S. Sarria Leg. M. 2861.GoogleMaps  Cauca Prov. Female allotype labeled: COLOMBIA Cauca, PNN Isla Gorgona El Hechelal 2°58′N 78°11′W 30m Malaise 6–22.iii.2001 R. Duque Leg. M. 1478.GoogleMaps  PARATYPE (1♀) COLOM- BIA Cauca, PNN Gorgona Mancora 2°58′N 78°11′W 60m Malaise 1/3/01 1/18/01 H. Torres Leg. M. 1235.GoogleMaps  Types deposited in IAVH. 

Etymology. This species is named for the Parque Nacional Natural Gorgona in Colombia, where the two female types were collected.

Diagnosis. Beltia gorgona  can be distinguished from other species in the genus by its larger size and brilliant dark green color with purple reflexions (which are easily seen with the naked eye but very difficult to photograph). It differs from B. angustomarginata  , another species with a marked purple reflexions, by the less transverse shape of the pronotum.

Remarks. Two male specimens in poor condition, labeled simply “South America, Colombia /feeding on banana leaves” (FSCA), are tentatively assigned to this species but not included in the type series. They differ from the holotype in having a stronger coppery color and a sharper and more asymmetrical tip on the median lobe of the aedeagus. The type series of B. gorgona  comes from only two localities on the Pacific coast of Colombia ( Fig. 78View Figures 78–79).


Colombia, Instituto Alexander von Humboldt