Reference : The Growth of the Skull Roof Plates in Arabosteus variabilis (Acanthothoraci, Placode...
Scientific journals : Article
Physical, chemical, mathematical & earth Sciences : Earth sciences & physical geography
Life sciences : Zoology
The Growth of the Skull Roof Plates in Arabosteus variabilis (Acanthothoraci, Placodermi) from the Early Devonian Jauf Formation (Saudi Arabia): Preliminary Results
Olive, Sébastien mailto [Université de Liège - ULiège > > > Form. doct. sc. (géologie - Bologne)]
Goujet, Daniel [Muséum National d'Histoire Naturelle (Paris, France) > > > >]
Lelièvre, Hervé [Muséum National d'Histoire Naturelle (Paris, France) > > > >]
Janvier, Philippe [Muséum National d'Histoire Naturelle (Paris, France) > > > >]
Paleontological Journal
[en] Placodermi ; Acanthothoraci ; Growth
[en] The skull roof growth of Arabosteus variabilis (Acanthothoraci), from the Pragian-Early Emsian
of Saudi Arabia is studied on the basis of well preserved growth lines on the dermal plates. A clear tendency towards growth in length, i.e. allometry in length, can be observed for all studied skull roof plates of Arabosteus variabilis as well as for the skull roof in general. Each studied plate displays particular growth shaping the skull roof according to its position in the skull roof pattern, e.g., the preorbital plate controls the shape of the part of the orbit and the nuchal plate retains the relative proportions in the skull roof during growth.

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