. Bulletin of the British Museum (Natural History) Geology Supplement. 208 UPPER CRETACEOUS TELEOSTS part of the floor are formed of pterotic whilst the medial wall and remainder of the floor consist of frontal, parietal and epiotic. Gosline, Marshall and Mead (1966 : 5) used the presence of a post-temporal fossa in Aulopus as evidence for an elopoid derivation of the myctophiforms, believing a post-temporal fossa to be absent in the salmoniforms. As Weitzman (1967 : 528) has indicated this is an erroneous interpretation of the nature of a post-temporal fossa, and post-temporal fossae are pres
. Bulletin of the British Museum (Natural History) Geology Supplement. 208 UPPER CRETACEOUS TELEOSTS part of the floor are formed of pterotic whilst the medial wall and remainder of the floor consist of frontal, parietal and epiotic. Gosline, Marshall and Mead (1966 : 5) used the presence of a post-temporal fossa in Aulopus as evidence for an elopoid derivation of the myctophiforms, believing a post-temporal fossa to be absent in the salmoniforms. As Weitzman (1967 : 528) has indicated this is an erroneous interpretation of the nature of a post-temporal fossa, and post-temporal fossae are present in most salmoniforms. It has been shown in the fossil salmoniform suborders considered in this paper, that the ichthyotringoids and the enchodontoids have representatives with completely roofed fossae, while the cimolichthyoids have a partially roofed fossa. In the floor of the fossa, near to the posterior edge, is a transversely orientated oval fenestra filled with cartilage. The epiotic joins the supraoccipital medially both on the roof of the skull and on the posterior face. Medial to the opening of the post-temporal fossa the epiotic has a prominent dorsal knob which provides the articulatory area for the dorsal limb of the Fig. Aulopus filamentosus. Neurocranium in lateral view. The sphenotic forms the postero-dorsal region of the orbit, contacting the frontal dorsally and the pterotic posteriorly. The sphenotic is partially obscured dorsally by the last infraorbital. This infraorbital is intimately connected to the edges of both the sphenotic and frontal. This intimate connection of the last infraorbital with sphenotic and frontal was noticed in Sardinioides (p. 154), and is also seen in Nematonotus (Text-fig. 94). The hyomandibular facet is formed of sphenotic, pterotic and prootic. The upper margin of the facet also forms the ventral border of the dilatator fossa. The facet is in two distinct regions, an anterior cup-shaped depression formed ma
Size: 2292px × 1091px
Photo credit: © Book Worm / Alamy / Afripics
License: Licensed
Model Released: No
Keywords: ., bookauthorbritishmuseumnaturalhistory, bookcentury1900, bookcoll
