Comparative microscopic dental anatomy in the Petalodontida (Chondrichthyes, Elasmobranchii) | Dental anatomy in the Petalodontida
1993
Zangerl, Rainer,
AGROVOC关键词
书目信息
Fieldiana, Geology, new ser., no. 26
ISSN
0096-2651
Publication (Field Museum of Natural History), 1445
出版者
Field Museum of Natural History
其它主题
Petalodontida; Condrichthyes
语言
英语
格式
print
注释
"Accepted March 13, 1992. Published March 31, 1993."
The microscopic anatomy of the teeth in 9 genera and 23 species of the Paleozoic elasmobranch order Petalodontida was examined in numerous thin sections. With two exceptions, the crowns of these teeth are covered with a highly characteristic, compound tissue, which Moy-Thomas called "tubular dentine" and for which the term "orthotrabeculine" is here proposed. Orthotrabeculine consists of a hypermineralized homologue of modern shark orthodentine and peritubular trabeculine surrounding vascular channels. On the flanks of the crown of Petalodus occurs the most primitive state of this tissue; its histogenetic development is discussed. In some species of Chomatodus and in Tanaodus, orthotrabeculine also forms an internal structure that may extend all the way from the cutting edge of the crown to the vicinity of the tooth base.
Fieldiana series has been published as Geological Series by Field Columbian Museum (1895-1909) and Field Museum of Natural History (1909-1943), and as Fieldiana: Geology by Chicago Natural History Museum (1945-1966) and Field Museum of Natural History (1966-).
类型
Text; Book
贡献者
Hansen, Michael C.; Winter, H. Frank.
2023-09-25
MODS
