Armenoceras

Belongs within: Actinoceratida.

Armenoceras was a genus of actinocerid cephalopods that lived from the Middle Ordovician to the Upper Silurian.

Characters (from Teichert 1964): Medium-sized to large straight shell. Siphuncle off-centre, large; adnation areas broad; septal necks very short, brims wide and in contact with posterior surface of septa; endosiphuncular canals well developed, commonly complex. Cameral deposits rare.

<==Armenoceras Foerste 1924 (see below for synonymy)T64
    |--*A. hearsti (Parks 1913) [=Actinoceras hearsti]T64
    |--A. arcticumT64
    |--A. asiaticum Endo 1932P68
    |--A. bassleri Endo 1932P68
    |--A. brevicameratum Foerste & Teichert 1930P68
    |--A. coulingiP68
    |--A. elegans Endo 1932P68
    |--A. elongatum Endo 1932P68
    |--A. gasconense Foerste 1936P68
    |--A. haroiP68
    |--A. hatai Endo 1932P68
    |--A. hayasakai Endo 1932P68
    |--A. kiaeri Teichert 1934K93
    |--A. kidoi Endo 1932P68
    |--A. madisonense Foerste & Teichert 1930P68
    |--A. manchurienseP68
    |--A. murakanmiiP68
    |--A. nanumP68
    |    |--A. n. nanumP68
    |    `--A. n. takayamai Endo 1932P68
    |--A. nudum Endo 1932P68
    |--A. numatai Endo 1932P68
    |--A. orientale Endo 1932P68
    |--A. penhsiense Endo 1932P68
    |--A. pseudoimbriatum (Barrande 1874)K93
    |--A. resseri Endo 1932P68
    |--A. richardsoniT64
    |--A. richthofeniP68
    |--A. shimizui Endo 1930P68
    |--A. sondai Endo 1932P68
    |--A. suzukii Endo 1932P68
    |--A. tani (Grabau 1922)K93
    |--A. teicherti Endo 1932P68
    `--A. yabei Endo 1932P68

Armenoceras Foerste 1924 [incl. Eushantungoceras Shimizu & Obata 1935, Helenites Zhuravleva 1962, Kokujoceras Balashov 1962, Linormoceras Kobayashi & Matumoto 1942, Neowutinoceras Shimizu & Obata 1935, Shantungoceras Shimizu & Obata 1936, Tunguskoceras Zhuravleva 1957, Yabeites Endo 1934]^T64

*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.

[T64] Teichert, C. 1964. Actinoceratoidea. In: Moore, R. C. (ed.) Treatise on Invertebrate Paleontology pt K. Mollusca 3. Cephalopoda—General Features—Endoceratoidea—Actinoceratoidea—Nautiloidea—Bactritoidea pp. K190–K216. The Geological Society of America and the University of Kansas Press.