. Breviora. 1986 LARVAL PARASUDIS RELATIONSHIPS 19 maxillae. In larvae these structures appear more strongly bound to the ethmoid. Finally, in Alepisaurus a condition much like that described in Salmo (Fink and Weitzman 1982; Rosen 1985) per- tains. Paired hyaline cartilages are strongly bound to the inner faces of the premaxillary symphyseal processes. Even from this cursory review it is clear the homologies of rostral morphologies and other associated structures throughout the lower Neoteleostei are questionable. By the level of the Acanthomorpha, the situation has stabilized such that there
. Breviora. 1986 LARVAL PARASUDIS RELATIONSHIPS 19 maxillae. In larvae these structures appear more strongly bound to the ethmoid. Finally, in Alepisaurus a condition much like that described in Salmo (Fink and Weitzman 1982; Rosen 1985) per- tains. Paired hyaline cartilages are strongly bound to the inner faces of the premaxillary symphyseal processes. Even from this cursory review it is clear the homologies of rostral morphologies and other associated structures throughout the lower Neoteleostei are questionable. By the level of the Acanthomorpha, the situation has stabilized such that there appears little doubt of the homology of the single median chondrified rostral cartilage strongly bound to the premaxillary ascending processes by a well-developed maxillo-rostroid ligament (Stiassny 1986). Until the distribution and homologies of the non-acanthomorph rostral structures are bet- ter understood, perhaps the term rostral cartilage should be re- stricted to that structure in the Acanthomorpha. When referring to the various rostral structures in non-acanthomorph neoteleosts before their homologies are resolved, the term "rostral cartilage" or "rostral structure" should be employed within quotation marks. ACKNOWLEDGMENTS We would like to thank the following individuals and institutions for the loan of material and/or helpful information and comments:. PMX. Please note that these images are extracted from scanned page images that may have been digitally enhanced for readability - coloration and appearance of these illustrations may not perfectly resemble the original Harvard University. Museum of Comparative Zoology. Cambridge, Mass. , Museum of Comparative Zoology, Harvard University
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