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The Rhinal Bone and Its Evolutionary Significance
Author(s) -
Bjerring Hans C.
Publication year - 1972
Publication title -
zoologica scripta
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 1.204
H-Index - 64
eISSN - 1463-6409
pISSN - 0300-3256
DOI - 10.1111/j.1463-6409.1972.tb00577.x
Subject(s) - vomer , anatomy , biology , efferent , afferent
Bjerring, H. C. (Section of Palaeozoology, Swedish Museum of Natural History, Stockholm, Sweden.) The rhinal bone and its evolutionary significance . Zool. Scripta 1 (5): 193–201, 1972.– On the basis of serially sectioned embryos of Amia calva , the ethmoidal region of the endocranium and certain adjacent exo‐skeletal elements are analysed. The results include evidence of the existence of branchial moieties pertaining to the first or premandibular metamere. Each of these moieties comprises infrapharyngobranchial (the ethmobasal), suprapharyngobranchial (the orbitonasal lamina), and epibranchial (the palatoquadrate pterygoid process) endoskeletal components as well as horizontal infrapharyngeal (the vomer), ascending infrapharyngeal (the rhinal), and epal (the dermopalatines and ectopterygoid) dental plates. The anterior cerebral arteries may represent the efferent blood vessels of the first‐metamere branchial moieties. A hypothesis on the origin of the nasal sacs is offered.