. Bulletin of the Natural History Museum Zoology. Fig. 2 Type 1 epaxial muscle as exemplified by Epinephelus merra (USNM 246689, mm SL). Inclinatores dorsales removed to expose medial muscles. Note the separate slip of epaxial muscle which inserts dorsally on to the second pterygiophore (directly behind the second spine) and the additional insertions on to pterygiophores 3-8. Abbreviations and other methods of presentation as in Fig. 1. Scale bar = 5 mm. Among these apomorphic morphologies, Type 1 is the easiest to characterize and identify. It is found among a restricted group of percifo
. Bulletin of the Natural History Museum Zoology. Fig. 2 Type 1 epaxial muscle as exemplified by Epinephelus merra (USNM 246689, mm SL). Inclinatores dorsales removed to expose medial muscles. Note the separate slip of epaxial muscle which inserts dorsally on to the second pterygiophore (directly behind the second spine) and the additional insertions on to pterygiophores 3-8. Abbreviations and other methods of presentation as in Fig. 1. Scale bar = 5 mm. Among these apomorphic morphologies, Type 1 is the easiest to characterize and identify. It is found among a restricted group of perciform families and is considered the exclusive epaxial/pterygiophore association of the Scorpaeni- formes (see below for discussion of Type 0 condition in Bathylutichthys). A scorpaeniform sister group has remained elusive and this has been a serious barrier to understanding internal relationships of the Scorpaeniformes. The presence of a derived Type 1 epaxial morphology in the Scorpaeni- formes and a small subset of the Perciformes suggests that the sister group of the Scorpaeniformes possibly lies within this subset. Percoid taxa rarely have been considered candidates for such status, although seven percoid families exhibit a Type 1 morphology (Table 1; Figs 2, 4-5). Despite generally being recognized as a heterogeneous and probably non- monophyletic assemblage ( Johnson, 1984), percoids have been referred to as a single, identifiable taxonomic SP1 SP1 PM SR1,. Fig. 3 Type 1 epaxial musculature in the batrachoidid Opsanus beta (MPM 8919, mm SL). Insertions to the 11th dorsal-fin pterygiophore. SP1, first spine; SRI, first segmented ray; other abbreviations and methods of presentation as in Fig. 1. Scale bar = 10 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 Natural History Museum (London). A
Size: 2757px × 906px
Photo credit: © Book Worm / Alamy / Afripics
License: Licensed
Model Released: No
Keywords: ., bhlconsortium, bookcentury1900, bookcollectionbiodiversity, bookl
