Search results
Results From The WOW.Com Content Network
Helicoprionidae (sometimes referred to as Agassizodontidae) [2] is an extinct family of holocephalans within the order Eugeneodontida.Members of the Helicoprionidae possessed a "whorl" of tooth crowns connected by a single root along the midline of the lower jaw.
Comparison of S. changhsingensis and Helicoprion sp.. Sinohelicoprion (meaning "Chinese spiral saw" or "Chinese Helicoprion") is an extinct genus of helicoprinid eugeneodontid fish that lived during the late Permian and possibly the Early Triassic, from 254 to 251 million years ago.
Helicoprion bessonowi was first described in an 1899 monograph by Alexander Karpinsky. Although it was not the first Helicoprion species to be described, it was the first known from complete tooth whorls, demonstrating that Helicoprion was distinct from Edestus. [13] As a result, H. bessonowi serves as the type species for Helicoprion. [20]
An Archival Resource Key (ARK) is a multi-purpose URL suited to being a persistent identifier for information objects of any type. It is widely used by libraries, data centers, archives, museums, publishers, and government agencies to provide reliable references to scholarly, scientific, and cultural objects.
[30] [33] A later study has proposed a most plausible total length of up to 7 meters (23 ft) for both Helicoprion and Parahelicoprion, and suggests that previous overestimations of Parahelicoprion's size were the result of assuming that the fossils were very small fragments of a Helicoprion-like spiral, rather than being nearly complete. [30]:
Main page; Contents; Current events; Random article; About Wikipedia; Contact us; Pages for logged out editors learn more
Main page; Contents; Current events; Random article; About Wikipedia; Contact us; Pages for logged out editors learn more
(VFR squawk code for airspace 5,000 feet (1,500 m) and below prior to 15 March 2007 when replaced by the international 7000 code for VFR traffic.) [5] 0022 Germany (VFR squawk code for airspace above 5,000 feet (1,500 m) – prior to 15 March 2007 when replaced by the international 7000 code for VFR traffic.) [5] 0025 Germany