Abstract
An abrupt change of bruchid taxa, distribution, and host range is evident in central and southwestern Ecuador. There are several hypotheses supported by data. One is expanded host range of the genus Sennius, which is very specific to Cassia (s.l.) north of Colombia, but feeds in seeds of other genera and subfamilies of Leguminosae in South America. Stator testudinarius was found also to feed in Pithecellobium saman. Acanthoscelides isla has a disjunct distribution due to past geologic changes. It feeds in seeds of Rhynchosia spp. only in Panama, Costa Rica, and Ecuador. Endemism in a biogeographically isolated area is exemplified by Acanthoscelides siemensi which feeds only in seeds of Duranta dombeyana in one locality in Ecuador. Guilds of bruchids are discussed because Stator testudinarius and Pseudopachymerina spinipes replace other bruchids in the same seed guilds there. Based on our data, we hypothesize that the distribution of bruchids in Ecuador is due to geologic events and present floral composition.
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Claims 5
Claim · model-written summary
Sennius feeds on Cassia north of Colombia.
Cassia
SenniusOrganisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“the genus Sennius, which is very specific to Cassia (s.l.) north of Colombia”
Claim · model-written summary
Sennius feeds in seeds of other Leguminosae genera and subfamilies in South America.
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“the genus Sennius, which is very specific to Cassia (s.l.) north of Colombia, but feeds in seeds of other genera and subfamilies of Leguminosae in South America.”
Claim · model-written summary
Stator testudinarius feeds in Pithecellobium saman.
- Taxon
- Pithecellobium saman
Samanea samane0 - Interactor
- Stator testudinarius
Stator testudinariuse0herbivore - Outcome
- feed in Pithecellobium samane0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Stator testudinarius was found also to feed in Pithecellobium saman.”
Claim · model-written summary
Acanthoscelides isla feeds in Rhynchosia seeds only in Panama, Costa Rica and Ecuador.
- Taxon
- Rhynchosia spp.
Rhynchosiae0 - Interactor
- Acanthoscelides islaAcanthoscelides islae0herbivore
- Outcome
- feeds in seeds of Rhynchosia spp.e0
- Setting
- Panama, Costa Rica, and Ecuadore0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Acanthoscelides isla has a disjunct distribution due to past geologic changes. It feeds in seeds of Rhynchosia spp. only in Panama, Costa Rica, and Ecuador.”
Claim · model-written summary
Acanthoscelides siemensi feeds only in Duranta dombeyana seeds at one Ecuador locality.
- Taxon
- Duranta dombeyanaDuranta dombeyanae0
- Interactor
- Acanthoscelides siemensie0herbivore
- Outcome
- feeds only in seeds of Duranta dombeyanae0
- Setting
- one locality in Ecuadore0
Verbatim
e0“Acanthoscelides siemensi which feeds only in seeds of Duranta dombeyana in one locality in Ecuador.”