Ontogeny and homology of the claustra in otophysan Ostariophysi (Teleostei)

Journal of Morphology
Ralf Britz, Matthias Hoffmann

Abstract

We studied the ontogeny of the claustrum comparatively in representatives of all otophysan subgroups. The claustrum of cypriniforms has a cartilaginous precursor, the claustral cartilage, which subsequently ossifies perichondrally at its anterior face and develops an extensive lamina of membrane bone. The membrane bone component of the claustrum and its close association with the atrium sinus imparis, a perilymphatic space of the Weberian apparatus, are both synapomorphies of cypriniforms. The characiform claustrum is not preformed in cartilage and originates as a membrane bone ossification, a putative synapomorphy of that taxon. Among siluriforms, the claustrum is present only in more basal groups and originates as an elongate cartilage that ossifies in a characteristic ventrodorsal direction, possibly a synapomorphy of catfishes. Gymnotiforms lack the claustral cartilage and claustrum. We review all previous hypothesis of claustrum homology in light of the above findings and conclude that the most plausible hypothesis is the one originally proposed by Bloch ([1900] Jen Z Naturw 34:1-64) that claustra are homologs of the supradorsals of the first vertebra.

References

Jan 2, 1975·Philosophical Transactions of the Royal Society of London. Series B, Biological Sciences·C Patterson
Oct 28, 2003·Developmental Dynamics : an Official Publication of the American Association of Anatomists·Nathan C Bird, Paula M Mabee

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Citations

Jun 27, 2007·Journal of Morphology·Nathan C Bird, L Patricia Hernandez
Dec 31, 2019·Journal of Morphology·Nathan C BirdSelena S Richardson
May 6, 2008·The Journal of Experimental Biology·Walter Lechner, Friedrich Ladich

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