. Bulletin of the Natural History Museum Zoology. i^riWM^,^iHim'twr'iTrT«T*0 cm. mc Fig. 8. Melanonus zugmayeri, jaw bones. A and B right maxilla from a 130mm SL specimen in: (A) dorsal and (B) medial and slightly ventral views; C, premaxilla in lateral view; D-F premaxilla, anterior (D) and posterior (E) regions from 130mm SL specimen and (F) 100mm SL specimen, ventral views; G, lower jaw of 130mm SL specimen in medial view. Macrouroids tend toward a deeper anguloarticular and greater variability in the shape of the retroarticular (Oka- mura, 1970; Howes & Crimmen, 1990). A boot-shaped re
. Bulletin of the Natural History Museum Zoology. i^riWM^,^iHim'twr'iTrT«T*0 cm. mc Fig. 8. Melanonus zugmayeri, jaw bones. A and B right maxilla from a 130mm SL specimen in: (A) dorsal and (B) medial and slightly ventral views; C, premaxilla in lateral view; D-F premaxilla, anterior (D) and posterior (E) regions from 130mm SL specimen and (F) 100mm SL specimen, ventral views; G, lower jaw of 130mm SL specimen in medial view. Macrouroids tend toward a deeper anguloarticular and greater variability in the shape of the retroarticular (Oka- mura, 1970; Howes & Crimmen, 1990). A boot-shaped retroarticular is lacking in both percopsiforms and lophii- forms. Palatopterygoquadrate (Fig. 9) The palatine (Fig. 9A,B) is long, its posterior tip extending to nearly halfway along the ectopterygoid, its rostral process is long and slender and overlies the maxilla, its base bears a broad facet which articulates with the ethmoid cavity and the body of the bone rises to a high posterior crest. There are two rows of sharply pointed teeth. The anterior part of the ectopterygoid (Fig. 9A) lies along the medial face of the palatine and its ventral stem reaches the quadrate joint; laterally it is slightly overlapped by the entopterygoid (Fig. 9A). The latter is a relatively large bone with a rounded dorsal profile and is sloped mesad, its posterior border is well separated from the hyomandibular by the metapterygoid. The metapterygoid (Fig. 9A) is axe- shaped its posterior margin rising high up the leading edge of the hyomandibular shaft. The melanonid palatine is unique amongst gadiforms, in its length, nature of contact with the pterygoids, and in bearing teeth. The common condition, and one which is considered synapomorphic for gadiforms () is for the palatine to be reduced in length with a vertical or slightly angled posterior border meeting a similar blunt margin of the ectopterygoid and forming a hinge-type joint (see figures in Okamura, 1970, 1989; Howes, 1990, 1991b; How
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Keywords: ., bhlconsortium, bookc, bookcentury1900, bookcollectionbiodiversity
