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Cladistic analysis of the alderflies of America north of Mexico (Megaloptera: Sialidae)
Author(s) -
WHITING MICHAEL F.
Publication year - 1994
Publication title -
systematic entomology
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 1.552
H-Index - 66
eISSN - 1365-3113
pISSN - 0307-6970
DOI - 10.1111/j.1365-3113.1994.tb00580.x
Subject(s) - biology , cladogram , cladistics , paraphyly , monophyly , zoology , ecology , phylogenetic tree , clade , biochemistry , gene
. A cladistic analysis of thirty‐five morphological characters is used to produce a cladogram for the twenty‐four American species of Sialis found north of Mexico, two European species, and three species of Protosialis . Three species groups ( americana, califomica and infumata ) proposed by Ross 1937 are shown to be monophyletic. Sialis, Protosialis , and the aequalis species group as currently constituted, are paraphyletic; S.nevadensis is nested within Protosialis and Protosialis is nested within Sialis . Character evolution is evaluated in the light of a phylogenetic hypothesis, and structural modifications are found to correlate with presumed functional constraints.