Beltia angustomarginata (Bechynĕ),

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: 6-7

publication ID

publication LSID


persistent identifier

treatment provided by


scientific name

Beltia angustomarginata (Bechynĕ)

new combination

Beltia angustomarginata (Bechynĕ)  , new combination

Figures 11, 13View Figures 9–17, 18View Figures 18–26, 42View Figures 42–49, 60View Figures 60–66, 80View Figures 80–82

Colaspoides placidula angustomarginata Bechynĕ 1953: 123  (original description); Bechynĕ 1953: 279; Flowers 1996: 31. Holotype deposited in NHMUK, photos of holotype seen. Type locality: Panamá: Gatun, 1–3.II.1925.

Redescription. Male ( Fig. 18View Figures 18–26). Body ovate, dorsally convex; length 6.1 mm. Head, pronotum, elytra, and underside metallic dark blue with strong purple reflexion; antennae testaceous with apical four antennomeres darker, legs dark reddish brown, central parts of femora shining greenish blue.

Head. Clypeus densely punctate, punctures separated by distance subequal to their diameters. Frontoclypeal suture distinct. Frons strongly punctate, surface between punctures smooth, punctures separated by distance greater than their diameters; vertex with a distinct median impressed line; antennal calli weakly differentiated.

Thorax. Prothorax distinctly wider than long, L/W = 0.5 ( Fig. 11View Figures 9–17, 18View Figures 18–26); disc regularly, finely punctate, punctures separated by distance greater than their diameters; surface between punctures glossy, with numerous punctulae. Prosternum smooth, sparsely punctate, glabrous; posterior margin of intercoxal process slightly concave, width of intercoxal process 1.1× diameter of procoxa. Metasternum smooth in center, finely wrinkled laterally; metepisternum finely alutaceous.

Elytra. Evenly punctate, punctures separated by distance greater than their diameters, surface between punctures with small punctulae; width across humeri 1.1× width across pronotum. Basal calli weakly developed, postbasal depression shallow.

Abdomen. Sterna with numerous short setae, and long setae across middle third at rear margin of segments III–VI, surface of segments alutaceous. Terga with a row of distinct spicules along base of segments II and III and laterally on IV; surface of V and VI shagreened.

Genitalia. Median lobe in lateral view strongly curved, with lateral flanges ( Fig. 42aView Figures 42–49); in en-face view “arrowhead”-shaped ( Fig. 42cView Figures 42–49), lateral flanges strongly sclerotized, apicolateral margins convergent to a small median triangular projection; apex of endophallus with a patch of strong spicules and a small curved apical sclerite ( Fig. 42bView Figures 42–49).

Female. Length 6.1–7.6 mm; color similar to male but purple reflex stronger; antennae testaceous, with apical three antennomeres piceous; color of legs as in male.

Head. Punctation as in male.

Thorax. Pronotum with proportions slightly less transverse than male, punctation as in male. Surface of prosternum with short whitish setae, posterior margin less concave. Metasternum and elytra as in male.

Abdomen. Sterna with scattered whitish setae, apex of sternum VII weakly crenulate, with apical, shallow, V-shaped emargination and a short, subapical transverse costa. Terga heavily sclerotized, surface alutaceous; a row of spicules along base of tergum II, a short basal row on either side of midline on terga III and IV; surface of V and VI shagreened.

Genitalia. Segments VIII–XI forming an elongate (L/W = 5.0) ovipositor ( Fig. 60aView Figures 60–66). Sternum VIII with a long, wire-like basal apodeme, slightly widened at apex; segment IX covered with minute spicules; hemisternites with elongate basal rods; baculum distinct, elongate; gonocoxae distinctly longer than wide. Spermatheca ( Fig. 60bView Figures 60–66) with bulb-like receptacle, distinctly constricted at union with pump.

Specimens examined. (1♂, 4♀) PANAMA: Colón Prov. (1♂) Colón, Sierra Llorona Lodge , 17–21- II- 2012, Col.: J.B. Heppner ( FSCA)  ; Panamá Prov. (1♀) Barro Colorado Island 5–9.I.1987 Windopans, forest H. Wolda, Gpo. 4B ( USNM); (2♀)  El Llano, Carti rd. km 8–11, 24 May–3 Jun 1992, 1100′ J.E. Wappes ( USNM); (1♀)  2700′, Cerro Campana , May 13, 1978 CW& LB O’Brien & Marshall ( FSCA)  .

Diagnosis. Males of Beltia angustomarginata  can be recognized by the wide pronotum and “arrowhead”- shaped apex of the median lobe. Females have a less obviously transverse pronotum, but share with the male a strong purple reflex on the upper body.

Remarks. Bechynĕ (1953) described B. angustomarginata  as a subspecies of Colaspoides  (now Beltia  ) placidula  , which is so far known only from a small area of Peru, based on a narrower pronotal margin and deeper postbasal depression. The structure and punctation of the pronotum in these two forms are different; additionally, in all specimens of B. placidula  the legs are entirely dark fulvous to brown, whereas all known specimens of B. angustomarginata  have metallic legs. This, along with the fact that both forms seem to have limited and disjunct distributions, appears to me to justify considering them distinct species. So far, this species (including the type) has been collected only in central Panama ( Fig. 80View Figures 80–82).


USA, Florida, Gainesville, Division of Plant Industry, Florida State Collection of Arthropods


USA, Washington D.C., National Museum of Natural History, [formerly, United States National Museum]














Beltia angustomarginata (Bechynĕ)

Flowers, R. Wills 2018

Colaspoides placidula angustomarginata Bechynĕ 1953: 123

Flowers, R. W. 1996: 31
Bechyne, J. 1953: 123
Bechyne, J. 1953: 279