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Phthiacnemia picta

Phthiacnemia picta

Chinche del Tomate

Family: Coreidae
Order: Hemiptera
Class: Insecta
Phylum / Division: Arthropoda
Kingdom: Animalia

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Synonyms: Phthia picta.





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Description


This is a moderately large, visually striking phytophagous hemipteran belonging to the leaf-footed bug family, measuring between 20 and 25 millimeters in length as an adult. It features an elongated body primarily colored dark brown to black, contrasted with brilliant yellow or orange markings that suggest an aposematic defense system. Its most defining morphological characteristic is the presence of distinctive leaf-like expansions on the hind tibiae, resembling small foliage. The pronotum is adorned with finely dentated lateral margins and a light-colored median longitudinal stripe, while its antennae display alternating dark and light segments, typically ending in a bright orange terminal segment.

Geographical distribution: This species is widely distributed across the Americas, ranging from the southern United States and Mexico, through Central America and the Caribbean islands, and extending deep into South America, where it is recorded in countries such as Colombia, Venezuela, Brazil, Ecuador, Peru, Bolivia, Paraguay, Uruguay, and northern Argentina. This vast range highlights its outstanding ecological adaptability and dispersal capabilities throughout neotropical regions.

Habitat: It primarily populates tropical dry forests, shrublands, forest edges, urban gardens, and agroecosystems. It exhibits a strong preference for open, sunlit spaces where its host plants are abundant, easily colonizing highly disturbed or anthropized environments created by agricultural expansion and urbanization.

Feeding: It is an strictly phytophagous and highly polyphagous insect. Equipped with piercing-sucking mouthparts, it punctures plant tissues to feed on sap and vital fluids. It shows a strong preference for developing fruits, seeds, and tender shoots, targeting plants within the Solanaceae, Passifloraceae, Fabaceae, and Cucurbitaceae families. Under favorable conditions, its feeding activity can turn it into a minor agricultural pest of commercial crops.

Behavior: It exhibits diurnal habits, with peak activity occurring during the warmest hours of the day. Adults are capable flyers, moving easily between host plants in search of food and mates. When confronted by potential predators, it deploys a chemical defense mechanism, emitting pungent and foul-smelling compounds from its metathoracic glands. Nymphs are known to display aggregation behavior, clustering together on host plants to minimize predation risks and maximize humidity conservation.

Reproduction: This insect undergoes hemimetabolous development, characterized by incomplete metamorphosis. Following mating, the female deposits eggs in neat rows or small clusters on the undersides of leaves or stems of host plants. The eggs are barrel-shaped and display a metallic or bronze sheen. After incubation, they hatch into nymphs that progress through five distinct instars, gradually developing wing pads and increasing in size until they undergo their final molt into sexually mature, winged adults.

Conservation status: It is currently not evaluated on the IUCN Red List. Given its extensive geographical range, high ecological plasticity, and robust population sizes, it does not face any major conservation threats, and its populations are considered stable throughout its distribution.



Compilation and publication: EcoRegistros – 19/08/2026




Geographic distribution


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Species photographs

Count: 75

Foto
Photography ID: 676745
  Nymph

Cabana, Unquillo
Córdoba
Argentina
03/07/2026
Manuel Eduardo Serra
Foto
Photography ID: 676500
  Nymph

Avellaneda
Buenos Aires
Argentina
02/28/2026
Marcos Garberoglio
Foto
Photography ID: 674448
  Adult

Cabana, Unquillo
Córdoba
Argentina
02/21/2026
Manuel Eduardo Serra
Foto
Photography ID: 672017
  Nymph

Montevideo
Montevideo
Uruguay
02/08/2026
Daiana Bustelo
Foto
Photography ID: 672016
 
Montevideo
Montevideo
Uruguay
02/08/2026
Daiana Bustelo
Foto
Photography ID: 672014
  Nymph

Montevideo
Montevideo
Uruguay
02/08/2026
Daiana Bustelo
Foto
Photography ID: 666749
  Adult

Valenzuela
Cordillera
Paraguay
01/09/2026
Guillermo Menéndez
Foto
Photography ID: 661992
  Adult

Alunail@nds
La Rioja
Argentina
10/07/2023
Ramón Vera
Foto
Photography ID: 661985
  Adult

Alunail@nds
La Rioja
Argentina
09/25/2025
Ramón Vera
Foto
Photography ID: 587656
  Nymph

Carcarañá
Santa Fe
Argentina
12/03/2019
Adrian Braidotti
Foto
Photography ID: 587655
  Nymph

Carcarañá
Santa Fe
Argentina
12/03/2019
Adrian Braidotti



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Species videos

Count: 1




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Species reports



 Detail of places sorted by number of records






Species records

Count: 76



Page 1 of 8
Record IDDateExact timeCountryProvince / departmentPlaceFilmedPhotographedRecorded vocalObservedHeardWounded or deadNumber of individualsUser or BibliographyDetail
244323607/03/2026ArgentinaCórdobaReserva Natural Los Quebrachitos, Cabana, UnquilloManuel Eduardo Serra
244252328/02/2026ArgentinaBuenos AiresEco Área Avellaneda, AvellanedaMarcos Garberoglio
243748521/02/2026ArgentinaCórdobaReserva Natural Los Quebrachitos, Cabana, UnquilloManuel Eduardo Serra
242951808/02/2026UruguayMontevideoMontevideoDaiana Bustelo
241389209/01/2026ParaguayCordilleraValenzuelaGuillermo Menéndez
239627525/09/2025ArgentinaLa RiojaAlunail@nds, Alunail@ndsRamón Vera
233492709/05/202513:16ArgentinaSanta FeAvenida General López 3681, Santa Fe de la Vera Cruz1Gustavo Fernando Durán
224583631/01/202516:32ArgentinaSanta FeReserva Ecológica Ciudad Universitaria UNL (RECU), Santa Fe1Gustavo Fernando Durán
202451919/04/2024ArgentinaBuenos AiresCity BellRoberto Battaglia
202329115/04/2024ArgentinaCórdobaLas VarillasHugo Caverzasi
Page 1 of 8

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Recommended citation
Please use the following reference when citing this species account.
EcoRegistros. 2026. Phthiacnemia picta – Species account. Accessed from www.ecoregistros.org on 14/09/2026.