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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
Isorthoceras Flower, 1962 JK19097
Karsteniceras beyrichi XB262
Kionoceras bacchusManda (1996), fig. 3 SM394
Kionoceras doricum JB544
Kionoceras doricum VF1005
Kionoceras VF1040
Kionoceras LC83
Kokenia tenuissima p6102
Kokenia tenuissimaChlupáč (1977), Pl. IV, fig. 4 Ich5402
Kopaninoceras affamoenum LC22
Kopaninoceras affamoenum LC15
Kopaninoceras barbarum LC86
Kopaninoceras fluminense Meneghini, 1857AD. Manda et al. (2022/2023) SM406
Kopaninoceras fluminense Meneghini, 1857AD. Manda et al. (2022/2023), Fig. 13C, D SM401
Kopaninoceras fluminense Meneghini, 1857AD. Manda et al. (2022/2023), Fig. 13H SM404
Kopaninoceras fluminense Meneghini, 1857AD. Manda et al. (2022/2023), Fig. 13A SM400
Kopaninoceras fluminense Meneghini, 1857 SM409
Kopaninoceras fluminense Meneghini, 1857AD. Manda et al. (2022/2023) SM407
Kopaninoceras fluminense Meneghini, 1857Manda et al. (2022/2023), Fig. 13F SM402
Kopaninoceras fluminense Meneghini, 1857 VF138
Virtual museum of the Czech Geological Survey, www.geology.cz, (C) Czech Geological Survey, 2011, v.0.99 [13.12.2011]