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.g., Pseudoginglymostoma, Stegostoma, Scoliodon).
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).
(18.) Case GR: Late Eocene selachians
from South Central Georgia.
association of Albaina indicates a Maastrichtian age, and more precisely a Late--but not latest--Maastrichtian age according to the presence of Rhombodus andriesi and Odontaspis bronni species.
Although Isidore had obviously read some of Aristotle's works, nothing from the "Historia Animalium" or the "Generation of Animals" made it to "The Etymologies." The only mention of a selachian
is that "The electric ray (torpedo) is named because it makes the body become numb (torpescere) if anyone touches it while it is alive" (Barney et al., 2011:262), and this is taken from Pliny.
Many of these latter worthies sported dental formulae more commonly associated with selachians
such as the ragged-tooth shark (Odontaspis taunts) or some of the larger inshore members of the Sparidae, or sea-bream family, specifically the so-called poenskop or black mussel cracker (Cvmatoceps nasutus).
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.