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CLADISTIC ANALYSIS OF IVA : A CASE IN POINT
Author(s) -
Bolick Margaret R.
Publication year - 1985
Publication title -
taxon
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.819
H-Index - 81
eISSN - 1996-8175
pISSN - 0040-0262
DOI - 10.2307/1221567
Subject(s) - synapomorphy , cladistics , biology , sensu stricto , sensu , zoology , phylogenetics , genus , clade , genetics , gene
Summary In 1960, Jackson divided Iva into three sections: Iva, Linearbractea , and Cyclachaena. A reanalysis of Iva using the precepts of Hennigian cladistics reveals 1) that there are no synapomorphies connecting sections Iva and Linearbractea to section Cyclachaena ; 2) that there are no synapomorphies connecting the species within Cyclachaena : and 3) that the species of Iva and Linearbractea are unified by three synapomorphies. The analysis also suggests that the five species of Cyclachaena are more closely related to other genera in the subtribe than they are to Iva and Linearbractea. The resulting classification recognizes Iva and Linearbractea as Iva sensu stricto and the five species of Cyclachaena as separate monotypic genera.