Paraphragmitidae

Belongs within: Orthoceratida.

The Middle Silurian Paraphragmitidae were orthoconic or cyrtoconic orthocerid cephalopods with a distinctly annulated shell.

Characters (from Sweet 1964): Annulated orthocones, cyrtocones and brevicones; siphuncle empty, subcentral, suborthochoanitic.

<==Paraphragmitidae
    |--Arterioceras concavum Zhuravleva 1978K93
    |--Paraphragmites Flower 1943S64
    |    `--*P. ascoceroides Flower 1943S64
    |--Calocyrtoceras Foerste 1936S64
    |    `--*C. cognatum (Barrande 1866) [=Cyrtoceras cognatum]S64
    |--Cyrtocycloceras Foerste 1936S64
    |    `--*C. urbanum (Barrande 1866) [=Cyrtoceras urbanum]S64
    |--Gaspocyrtoceras Foerste 1936S64
    |    |--*G. cooperi Foerste 1936S64
    |    `--G. telleri Foerste 1936P68
    `--Lyecoceras Mutvei 1957S64
         |--*L. gotlandense Mutvei 1957S64
         `--L. longistriatumS64

*Type species of generic name indicated

References

[K93] King, A. H. 1993. Mollusca: Cephalopoda (Nautiloidea). In: Benton, M. J. (ed.) The Fossil Record 2 pp. 169–188. Chapman & Hall: London.

[P68] Purnell, L. R. 1968. Catalog of the type specimens of invertebrate fossils. Part I: Paleozoic Cephalopoda. United States National Museum Bulletin 262: 1–198.

[S64] Sweet, W. C. 1964. Nautiloidea—Orthocerida. In: Moore, R. C. (ed.) Treatise on Invertebrate Paleontology pt K. Mollusca 3. Cephalopoda—General Features—Endoceratoidea—Actinoceratoidea—Nautiloidea—Bactritoidea pp. K216–K261. The Geological Society of America and the University of Kansas Press.