. Bulletin des Museums für Vergleichende Zoologie an der Harvard College. Zoologie. 498 Bulletin Museum für Vergleichende Zoologie, Vol. 147, Nr. 12 § 00. w.psp p.m.f. g Abbildung 7. Wiederaufbau der medialen Oberfläche der Unterkiefer des Caerorhachis bairdi, > 3. gesehen werden. Obwohl oft in Tem-nospondyls werden diese Strukturen nicht Kom-mon in anthracosaurs, wo Sie nur in einige Bewohner von em Berichtet bolomeres (Romer 1963) und der Gattung Pennsyl- vanian Gephyrostegus (Carroll 1970). Die dentary hat Raum für zwischen 60 und 65 Zähne, die alle mit einfachen konischen structu

• Bildanbieter: Book Worm / Alamy Stock Foto
• Bild-ID: RGEP0M
• Dateigröße: 7,2 MB (240,1 KB Komprimierter Download)
• Freigaben (Releases): Model - nein | Eigentum - nein
• Format: 982 x 2545 px | 8,3 x 21,5 cm | 3,3 x 8,5 inches | 300dpi

Weitere Informationen

Dieses Bild ist ein gemeinfreies Bild. Dies bedeutet, dass entweder das Urheberrecht dafür abgelaufen ist oder der Inhaber des Bildes auf sein Urheberrecht verzichtet hat. Alamy berechnet Ihnen eine Gebühr für den Zugriff auf die hochauflösende Kopie des Bildes.

Dieses Bild kann kleinere Mängel aufweisen, da es sich um ein historisches Bild oder ein Reportagebild handel

. Bulletin of the Museum of Comparative Zoology at Harvard College. Zoology. 498 Bulletin Museum of Comparative Zoology, Vol. 147, No. 12 art. a.m .f. psp p.m.f. an g Figure 7. Reconstruction of the medial surface of the lower jaw of Caerorhachis bairdi, > 3. be seen. Although often present in tem- nospondyls, these structures are not com- mon in anthracosaurs, where they have been reported only in some Mississippian em- bolomeres (Romer 1963) and the Pennsyl- vanian genus Gephyrostegus (Carroll 1970). The dentary has room for between 60 and 65 teeth, all of which are simple conical structures, curved slightly back- wards and showing labyrinth infolding. The teeth are significantly larger at two points in the tooth row. The first peak is located at about the 18th tooth, and the sec- ond at about the 32nd. There are three meckelian fenestrae on the medial surface of the jaw. The most posterior is the largest, and is bordered pos- teroventrally by the angular, anteriorly by the postsplenial, and posterodorsally by the prearticular. Two additional fenestrae, lo- cated more anteriorly, are slightly smaller. They both appear to be bordered ventrally by splenial elements and dorsally by the prearticular. If the short axis of the lower jaws was oriented vertically, the articulating surface of the articular bone would face medio- dorsally, rather than directly dorsally. This indicates that, when in articulation, the jaw of Caerorhachis must have been tilted medi- ally to a greater degree than in most laby- rinthodonts. Romer and Witter noted a sim- ilar situation in Edops. Consequently, the medial surface faced obliquely dorsally to- ward the palate, and when the jaws were clamped shut they would have forced the prey up onto the palate. Presumably the thick and complete covering of denticles present on the palate and inner surface of the mandibles assisted the palatal fangs and marginal teeth in holding the prey. Axial skeleton. The atlas-axis complex is preserved immedi

Stockbilder mithilfe von Tags suchen

• bookauthorharvarduniversity
• bookcentury1900
• booksubjectzoology