. Chordate morphology. Morphology (Animals); Chordata. asol capsule olfactory nerve foramen nasohypophyseal openingâCâ area of attachment of posterior tectal cartilage orbital cartilage °>'"^ capsule IV,V,VI endolymphatic foramen neural arch ventral root foramen of 1st spinal nerve t-rv?I=râchordal rod notochord. subocular arch orbital cartilage styloid cartilage hypophyseol fenestra neural arch â chordal rod notochord notochord Figure 5-25. Endocranium of the lamprey. A, anterolateral view with port of nasol and otic capsules cut owoy; B, dorsal view with left half of nasal capsule r
. Chordate morphology. Morphology (Animals); Chordata. asol capsule olfactory nerve foramen nasohypophyseal openingâCâ area of attachment of posterior tectal cartilage orbital cartilage °>'"^ capsule IV,V,VI endolymphatic foramen neural arch ventral root foramen of 1st spinal nerve t-rv?I=râchordal rod notochord. subocular arch orbital cartilage styloid cartilage hypophyseol fenestra neural arch â chordal rod notochord notochord Figure 5-25. Endocranium of the lamprey. A, anterolateral view with port of nasol and otic capsules cut owoy; B, dorsal view with left half of nasal capsule removed; C, ventral view. The nasal capsule is thin-walled and is separated from the rest of the endocranium. It encloses the posteroventral half of the nasal sac and is perforated by two large olfactory foramina separated by a rather thick strut. Attached to the endocranium is a subocular arch. From this arch a styliform process extends down to the side of the pharyngeal cavity. Its tip is attached by fibrous cartilage to the cornual cartilage extending forward below the pharyn- geal cavity alongside the piston cartilage. Medial to the styliform processes lie small velar cartilages, which join below the pharyngoesophageal tube to support the anteri- orly projecting fingers of the velum. The anterior end of the basitrabecular plate articulates with the posterior tectal cartilage. From the lateral margins of this, ethmoid processes extend ventrolaterally and slightly forward as part of the subocular arches. The distal end of the ethmoid process is joined by soft cartilage to the posterior lateral cartilage. In front of and overlapped by the posterior tectal cartilage is an anterior tectal cartilage. This has bilateral oral proc- esses, which extend posteriorly and down on either side to attach to the general tissue mass above and medial to the bases of the spinous cartilages. Just anterior to the oral processes lie the small anterior lateral cartilages, which are closely bo
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Keywords: ., bookcentury1900, bookcollectionameri, bookcollectionbiodiversity
