Geometric morphometrics as a tool for interpreting evolutionary transitions in the black fly wing (Diptera: Simuliidae)

Autor(es)

Pepinelli, Mateus ^[1] ; Spironello, Mike ^[2] ; Currie, Douglas C. ^{[2, 3]}

Afiliação do(s) autor(es)

^[1] Univ Fed Sao Carlos, Dept Hidrobiol, BR-13560 Sao Carlos, SP - Brazil

^[2] Univ Toronto, Dept Ecol & Evolutionary Biol, Toronto, ON M5S 3B2 - Canada

^[3] Royal Ontario Museum, Dept Nat Hist, Toronto, ON M5S 2C6 - Canada

• Tipo de documento: Artigo Científico
• Fonte: ZOOLOGICAL JOURNAL OF THE LINNEAN SOCIETY; v. 169, n. 2, p. 377-388, OCT 2013.
• Citações Web of Science: 9

Resumo

A geometric morphometric analysis was conducted on wing-vein landmarks on exemplar species of the family Simuliidae of the following genera: Parasimulium, Gymnopais, Twinnia, Helodon, Prosimulium, Greniera, Stegopterna, Tlalocomyia, Cnephia, Ectemnia, Metacnephia, Austrosimulium, and Simulium. Generalized least squares superimposition was performed on landmarks, followed by a principal component analysis on resulting Procrustes distances. Patterns of shape change along the principal component axes were visualized using the thin-plate spline. The analysis revealed wing shape diversity through (1) the insertion points of the subcosta and R-1, resulting in the terminus of the costa exhibiting a trend towards a more apical position on the wing, and (2) the insertion point of the humeral cross vein, resulting in the anterior branch of the media exhibiting a trend toward a more basal position on the wing. Canonical variates analysis of Procrustes distances successfully assigned all exemplar species into their a priori taxonomic groupings. The diversity in wing shape reveals a trend towards decreased length of basal radial cell and increased costalization of anterior wing veins in the evolutionary transition from plesiomorphic prosimuliines to more derived simuliines. The functional significance of these evolutionary transitions is discussed.(c) 2013 The Linnean Society of London (AU)

• Processo FAPESP: 07/56574-4 - DNA barcoding de espécies de Simuliidae neotropicais
• Beneficiário: Mateus Pepinelli
• Modalidade de apoio: Bolsas no Brasil - Pós-Doutorado