Phylogeny of the suborder Myliobatidoidei
1990
Nishida, K. (Hokkaido Univ., Hakodate (Japan). Faculty of Fisheries)
This study was made with the fourfold purpose of (1) describing the skeletal and myological characters of myliobatidoids in detail, (2) clarifying the monophyly of the suborder Myliobatidoidei, (3) estimating interrelationships of the suborder, and (4) presenting a phylogenetic classification of the suborder. Examples of 57 species from 15 myliobatidoid genera and 30 species from 24 genera of other rajiformes, were used for the comparative study. Skeletal (neurocranium; visceral arches; pectoral girdle, pectoral fin and cephalic fin; pelvic girdle and pelvic fin; vertebrae, dorsal fin and caudal fin), muscular (head and body muscles; other muscles), and other (external morphology; brain; intestine; rectal gland; clasper) systems were examined. Forty-five characters were selected for a proposal of myliobatidoid phylogeny. The polarity of each character was determined according to Maddison et al. (1984), and Hennig's (1966) cladistic method was used to construct phylogenetic relationships
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