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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

Last published photographs

Foto
Photography ID: 447430
  Adult

Santo Tomé
Santa Fe
Argentina
05/03/2021
Eduardo Beltrocco
Foto
Photography ID: 441413
  Adult

Santo Tomé
Santa Fe
Argentina
04/15/2021
Eduardo Beltrocco
Foto
Photography ID: 440471
  Adult

Santo Tomé
Santa Fe
Argentina
04/06/2021
Eduardo Beltrocco
Foto
Photography ID: 435210
  Adult

Santo Tomé
Santa Fe
Argentina
02/20/2021
Eduardo Beltrocco
Foto
Photography ID: 435205
  Adult

Santo Tomé
Santa Fe
Argentina
02/20/2021
Eduardo Beltrocco
Foto
Photography ID: 429300
  Adult

Santa Fe
Santa Fe
Argentina
01/13/2021
Eduardo Beltrocco
Foto
Photography ID: 362843
  Adult

Santo Tomé
Santa Fe
Argentina
03/23/2017
Eduardo Beltrocco
Foto
Photography ID: 169852
  Adult

Santo Tomé
Santa Fe
Argentina
04/11/2013
Eduardo Beltrocco



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Species reports



 Detail of places sorted by number of records








Page 1
Record IDDateExact timeCountryProvince / departmentPlaceFilmedPhotographedRecorded vocalObservedHeardWounded or deadNumber of individualsUser or BibliographyDetail
140949103/05/2021ArgentinaSanta FeSarmiento y Centenario, Santo ToméEduardo Beltrocco
139467715/04/2021ArgentinaSanta FeSarmiento y Centenario, Santo ToméEduardo Beltrocco
139313406/04/2021ArgentinaSanta Fe25 de mayo, entre Chacabuco y Sargento Cabral, Santo ToméEduardo Beltrocco
137337120/02/2021ArgentinaSanta FeHumedal lindante al Rio Salado, Santo ToméEduardo Beltrocco
134923213/01/2021ArgentinaSanta FeJardín Botánico Municipal Ing. Lorenzo Parodi, Santa FeEduardo Beltrocco
113348123/03/2017ArgentinaSanta FeHumedal lindante al Rio Salado, Santo ToméEduardo Beltrocco
48593611/04/2013ArgentinaSanta FeSanto ToméEduardo Beltrocco
Page 1

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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 02/10/2026.