Long (1992c) and Case (1992) analyzed the ecology and diversity of the Eocene Seymour selachian
fauna and concluded that the selachian
fauna represents a cool-temperate fauna with different ecological components including tropical water immigrants (e.
Included in the selachians
were two species from the family Orectolobidae--Orectolobus maculatus (Bon-naterre, 1778) and Orectolobus ornatus (De Vis 1883); one species from the family Hemiscylliidae--Hemiscyllium ocellatum (Bonnaterre, 1788); and two species from the family Carcharhinidae-Carcharhinus melanopterus (Quoy and Gaimard, 1824) and Negaprion acutidens (Riippell, 1837).
Case GR: Late Eocene selachians
from South Central Georgia.
The fact that in the same layer selachian
teeth with a pristine conservation are found together with others showing signs of abrasion suggests that the latter remained in a nearshore energetic environment for a long time before the burial.
fauna from the Upper Miocene Senhata Formation, Boso Peninsula, Central Japan.
On the other hand, chimaeroid fishes are durophagous organisms adapted to prey upon soft- and hard-bodied prey, and the locality of Alto Guayacan is characterized by abundant selachian
, osteichthyan and molluscan fossil fauna.
In addition, an upper horizon of the Lano quarry has yielded a shallow marine vertebrate association of late Maastrichtian age, which consists of selachians
, actinopterygians, mosasaurids, and plesiosaurs (about 37 species).
New species of selachians
in the museum collection.
These technical measures concern closed fishing zones, the obligation to use sorting grids and square-mesh nets, the ban on skimming in the North Sea and Atlantic and provisions for the protection of selachians
and the use of driftnets.
Fish specimens were measured to the nearest mm following the methods of Compagno (1984) for selachians
, De Buen (1959) for batoids and Hardy and Stehmann (1990) for chimaeras.
Cretaceous fishes, selachians
and ptychodonts: Univ.
Miocene fossil vertebrates, including selachians
, turtles, crocodylians and diverse mammals (e.
from the Hosta Tongue of the Point Lookout Sandstone (Upper Cretaceous, Santonian), Central New Mexico.