Notidanodon lanceolatus Woodward is reported from Late Aptian strata of northern California. This specimen, the oldest fossil cow shark (Hexanchidae) in the New World, greatly extends the geographic ...distribution of this species and confirms the eurytopic distribution of this genus. We suggest that cow shark teeth evolve in an orderly sequence in which the mesial edge of the tooth is at first smooth (Notidanus muensteri), then serrate (Notidanus serratus, Notorynchus aptiensis), and finally dentate (Notidanodon lanceolatus).
Iz rezultata terenskih istraživanja i podataka iz literature proizlazi da je u Crnom, Mramornom i Egejskom moru, između 1974. i 2003. ulovljeno ukupno 39 primjeraka psa glavonje, Hexanchus griseus. ...Jedan primjerak uhvaćen je u predbosporskim vodama jugozapadnog Crnog mora, 27 u Mramornom i 11 u Egejskom moru. H. griseus prvi je nalaz te vrste za jugozapadni dio Crnog mora. Iz dostupnih saznanja dade se naslutiti da se H. griseus rađa od listopada do kraja veljače u sjevernom Egejskom i Mramornom moru. Glavni plijen navedenih primjeraka psa glavonje bili su teleostei.
Iz rezultata terenskih istraživanja i podataka iz literature proizlazi da je u Crnom, Mramornom i Egejskom moru, između 1974. i 2003. ulovljeno ukupno 39 primjeraka psa glavonje, Hexanchus griseus. ...Jedan primjerak uhvaćen je u predbosporskim vodama jugozapadnog Crnog mora, 27 u Mramornom i 11 u Egejskom moru. H. griseus prvi je nalaz te vrste za jugozapadni dio Crnog mora. Iz dostupnih saznanja dade se naslutiti da se H. griseus rađa od listopada do kraja veljače u sjevernom Egejskom i Mramornom moru. Glavni plijen navedenih primjeraka psa glavonje bili su teleostei.
A search through field surveys and literature revealed that 39 bluntnose sixgill sharks, Hexanchus griseus, were captured in the Black, Marmara, and Aegean Seas between 1974 and 2003. One of the specimens was captured in the prebosphoric waters of the southwestern Black Sea, 27 in the Sea of Marmara, and 11 in the Aegean Sea. H. griseus is hereby recorded for the first time in the southwestern Black Sea. Available information suggests that H. griseus gives birth from October to the end of February in the northern Aegean and Sea of Marmara. The main prey of the listed sixgill sharks were teleosteans.
A Canadian-made prototype manned submersible, deployed from the waterfront of Vancouver, British Columbia, Canada, was instrumental in the discovery of the presence of juvenile sixgill sharks, ...Hexanchus griseus, in 100-m depths. The relative ease of finding juveniles of this "urban shark" species close to the city of Vancouver in depths deeper than divers can penetrate or fishermen regularly fish reflects the presence in nearshore habitat for a species that is well known south of the US-Canada border in the large marine catchment area of the Salish Sea. The bluntnose sixgill shark is a large-bodied carnivorous shark typically found in deepwater (to 2,000-plus m) throughout the oceans and in certain shallow waters. The objective of the study was to determine the feasibility of using a three-man research submersible in conjunction with attractants at a location close to urban Vancouver as a census method for sixgill sharks that extends the search range for uncommon taxa beyond the depths normally encountered by divers and fishers.
PDF