GONORYNCHIFORMES

Datovo, Aléssio & Vari, Richard P., 2014, The adductor mandibulae muscle complex in lower teleostean fishes (Osteichthyes: Actinopterygii): comparative anatomy, synonymy, and phylogenetic implications, Zoological Journal of the Linnean Society 171 (3), pp. 554-622 : 613

GONORYNCHIFORMES : GONORYNCHOIDEI AND KNERIOIDEI

Fink & Fink (1996) proposed [5] the absence of the segmentum mandibularis (= their Aω) as a synapomorphy supporting the sister-group relationship between the Gonorynchoidei ( Gonorynchidae ) and Knerioidei ( Kneriidae , Phractolaemidae ). We confirm that this muscle is primitively present in the generalized members of all basal teleostean orders, including the basal gonorynchiform Chanos (Chanoidei) . The validity of the character 5 is, thus, indirectly corroborated in the present study (note – this subordinal character not shown on Fig. 26 ).

Figures

Figure 26. Adductor mandibulae and associated structures of Oncorhynchus mykiss (Salmoniformes: Salmonoidei: Salmonidae), MZUSP 85378 (106.4 mm standard length). Left side in (A) lateral and (B) medial views. Arrow indicates dorsal separation between the epistegalis and ricto-malaris. Anterodorsal tip of the dentary in B accidentally cut during dissection. Abbreviations: AM, adductor mandibulae; IA, intersegmental aponeurosis; RMT, ramus mandibularis trigeminus nerve.