. Early Devonian fishes from Utah : Heteroostraci . tc5 Fig. 68. Restoration of dorsal shield of Cardipeltis ivallacii (X H)- brn, branchial notch; Idl, lateral dorsal sensory line; mdl, median dorsal sensory- canal; psl, ?pineal-supraorbital sensory canal; ic2-5, dorsal sensory transverse commissures. 4. No specimens have been collected that might represent ros- tral, pineal, or orbital plates. This is, of course, purely negative evidence, but perhaps sufficient collecting has been done so that it has some weight. The following points may be interpreted as supporting the view that the Cardipe
. Early Devonian fishes from Utah : Heteroostraci . tc5 Fig. 68. Restoration of dorsal shield of Cardipeltis ivallacii (X H)- brn, branchial notch; Idl, lateral dorsal sensory line; mdl, median dorsal sensory- canal; psl, ?pineal-supraorbital sensory canal; ic2-5, dorsal sensory transverse commissures. 4. No specimens have been collected that might represent ros- tral, pineal, or orbital plates. This is, of course, purely negative evidence, but perhaps sufficient collecting has been done so that it has some weight. The following points may be interpreted as supporting the view that the Cardipeltis shield is only a dorsal disc, not the complete dorsal shield: 1. The absence of a pineal macula. This is not conclusive since the macula is indistinct in some Cyathaspidae, as Dinaspidella and Irregulareaspis.
Size: 2157px × 2317px
Photo credit: © The Bookworm Collection / Alamy / Afripics
License: Licensed
Model Released: No
Keywords: ., bookcentury1900, bookcollectionbiodiver, booksubjectfishesfossil
