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Cephalopods

      A cephalopod is any member of the molluscan class Cephalopoda (Greek plural Κεφαλόποδα (kephalópoda); "head-feet"). These exclusively marine animals are characterized by bilateral body symmetry, a prominent head, and a set of arms or tentacles (muscular hydrostats) modified from the primitive molluscan foot. Fishermen sometimes call them inkfish, referring to their common ability to squirt ink. The study of cephalopods is a branch of malacology known as teuthology. Cephalopods became dominant during the Ordovician period, represented by primitive nautiloids. The class now contains two, only distantly related, extant subclasses: Coleoidea, which includes octopuses, squid, and cuttlefish; and Nautiloidea, represented by Nautilus and Allonautilus. In the Coleoidea, the molluscan shell has been internalized or is absent, whereas in the Nautiloidea, the external shell remains. About 800 living species of cephalopods have been identified. Two important extinct taxa are the Ammonoidea (ammonites) and Belemnoidea (belemnites).

Source: http://en.wikipedia.org/wiki/Cephalopod


 

CW13
Bactroceras sandbergeri Barrande, 1868 CW13
CW12
Bactroceras sandbergeri Barrande, 1868 CW12
CW11
Bactroceras sandbergeri Barrande, 1868 CW11
JB495
Cumingsoceras JB495
PT5C
div. gen. PT5
PT5A
div. gen. PT5
JB337
Goldringia gondola JB337
e16
Kopaninoceras e16
e15
Kopaninoceras e15
JB498
Kosovoceras sandbergeri JB498
JB520
Oonoceras JB520
JB466
Oonoceras JB466
JB491
Ophioceras simplex JB491
JB484
Parakionoceras originale JB484
YA86
Ptenoceras alatum YA86
JB518
Umbeloceras incola Barrande, 1865 JB518
    

In the Virtual Museum there are total 2315 samples

Virtual museum of the Czech Geological Survey, www.geology.cz, (C) Czech Geological Survey, 2011, v.0.99 [13.12.2011]