. Bulletin of the Museum of Comparative Zoology at Harvard College. Zoology. Paracheirodon Relationships • Weitzman and Fink 353 pterotic parietal pterosphenoid orbitosphenoid frontai\ rhinosphenoid lateral ethmoid nasa mesethmoid vomer premaxilla ontorbita palatine infraorbital 1 ectopterygoid dentary maxilla mesopterygoid infraorbital 2 anguloarticular retroarticular supraoccipital posttemporal epioccipital exoccipital. basioccipital opercle hyomandibula supracleithrum postcleithrum 1 cleithrum subopercle interopercle preopercle "^"^^'^^^^branchostegal rays ^infraorbital 3 Figure 5
. Bulletin of the Museum of Comparative Zoology at Harvard College. Zoology. Paracheirodon Relationships • Weitzman and Fink 353 pterotic parietal pterosphenoid orbitosphenoid frontai\ rhinosphenoid lateral ethmoid nasa mesethmoid vomer premaxilla ontorbita palatine infraorbital 1 ectopterygoid dentary maxilla mesopterygoid infraorbital 2 anguloarticular retroarticular supraoccipital posttemporal epioccipital exoccipital. basioccipital opercle hyomandibula supracleithrum postcleithrum 1 cleithrum subopercle interopercle preopercle "^"^^'^^^^branchostegal rays ^infraorbital 3 Figure 5. Diagram of skull and pectoral girdle of Paracheirodon axelrodi witti eacti bone represented by a different pattern. Adult female. SL mm, USNM 216910, lateral view, left side. part this may be due to the poor morpho- logical information available for possibly related characid groups. Before forming hypotheses of relationship among the var- ious groups of small and miniature char- acids, those groups need to be diagnosed by further phylogenetic studies. The pres- ent contribution is only a beginning at- tempt to identify monophyletic characid groups. Paracheirodon Gery Paracheirodon Gery, 1960b: 12 (type species: Hy- phessobrycon innesi Myers, by original designa- tion). Lamprocheirodon Gery, 1960b: 13, as a subgenus (type species: Cheirodon axelrodi Schultz, by orig- inal designation). Phylogenetic Analysis of Paracheirodon Below we present evidence for the monophyly of Paracheirodon. For each character, the derived state is listed first, followed by the character as found in out- groups. In the skull figures we use a diagram- matic representation with a standardized pattern for each bone. The skull of P. ax- elrodi, unlabeled in Figure 4, is repeated and labeled in pattern form in Figure 5. These two figures are provided in part as a guide to the use of the remaining skull figures. The following characters are synapo- morphies for the neon Please note that the
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