Diastrophini
Ronquist et al., 2015
Genus Guides
2Diastrophini is a tribe of gall wasps established in 2015 based on molecular phylogenetic analysis. It comprises four with distinct ecological strategies: Diastrophus and Xestophanes are gall-inducers, while Perclistus and Synophromorpha are that inhabit galls created by other . All are associated with plants in the rose (Rosaceae). The tribe is distributed primarily across the .
Pronunciation
How to pronounce Diastrophini: /di.əsˈtroʊ.fəˌnaɪ/
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Identification
Diastrophini can be distinguished from other cynipine tribes by molecular and morphological characters established in the 2015 revision by Ronquist et al. The tribe contains both gall-inducing and , with ecological strategy serving as a diagnostic feature at the genus level. Xestophanes induces galls on Potentilla, while Synophromorpha specifically inquilines in Diastrophus galls on Rubus. Identification to genus requires examination of association and gall .
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Habitat
are defined by plant distribution. occur in environments where Rosaceae grow, including meadows, woodlands, shrublands, and disturbed areas. Xestophanes is found in habitats supporting Potentilla; Diastrophus and Synophromorpha occur where Rubus bushes are present.
Distribution
Primarily Holarctic, with distribution throughout North America, Europe, and Asia. Some extend into the . The tribe's range corresponds to the distribution of its Rosaceae plants.
Host Associations
- Rosaceae - plant All in the tribe are associated with Rosaceae. Xestophanes induces galls on Potentilla; Diastrophus induces galls on Rubus; Synophromorpha in Diastrophus galls on Rubus.
Life Cycle
Gall-inducing (Diastrophus, Xestophanes) trigger abnormal plant growth to form larval chambers. genera (Perclistus, Synophromorpha) develop within existing galls rather than inducing their own. Synophromorpha specifically occupies galls abandoned by or co-inhabited with Diastrophus on Rubus.
Ecological Role
Gall-inducers modify plant tissue, creating microhabitats that may support additional organisms. occupy these structures without inducing galls themselves, representing a derived ecological strategy within the tribe. The presence of both strategies within a single tribe illustrates evolutionary diversification in resource use.
Similar Taxa
- Other Cynipinae tribesDiastrophini was separated from historically recognized groupings based on molecular phylogenetic analysis. Prior to 2015, its constituent were classified differently within Cynipinae.
More Details
Taxonomic history
The tribe was erected in 2015 by Ronquist et al. as part of a comprehensive molecular phylogenetic revision of Cynipidae, replacing previous informal groupings.
Ecological dichotomy
The tribe is notable for containing both gall-inducing and , representing two distinct strategies within a .