Agathiceras, from here.

Belongs within: Ammonoidea.

The Agathiceratide are a group of subdiscoidal to globular ammonoids known from the Upper Carboniferous to the Middle Permian (Miller et al. 1957).

Characters (from Miller et al. 1957): Conch subdiscoidal to globular, umbilicus small, test prominently longitudinally lirate. Sutures goniatitic.

<==Agathiceratidae [Paragastrioceratidae] ZL04
    |--Gaetanoceras RR79
    |--Uraloceras RR79
    |--Tumaroceras RR79
    |--Altudoceras RR79
    |--Synuraloceras RR79
    |--Strigogoniatites RR79
    |    |--S. angulatus RR79
    |    `--S. fountaini Miller & Furnish 1940 P68
    |--Pseudogastrioceras RR79
    |    |--P. altudense P68
    |    |--P. beedei P68
    |    |--P. cooperi (Miller 1945) P68
    |    |--P. mckeei Miller & Furnish 1958 P68
    |    `--P. roadense P68
    `--Agathiceras Gemmellaro 1887 [incl. Paragastrioceras Ruzhencev 1950] ZL04
         |--*A. suessi Gemmellaro 1887 ZL04
         |--A. applini P68
         |--A. ciscoense Smith 1903 P68
         |--A. girtyi P68
         |--A. mediterraneum Toumanskaya 1949 [incl. A. frechi var. ircutensis Toumonaskaya 1949] ZL04
         `--A. texanum Girty 1908 P68

*Type species of generic name indicated


Miller, A. K., W. M. Furnish & O. H. Schindewolf. 1957. Paleozoic Ammonoidea. In: Moore, R. C. (ed.) Treatise on Invertebrate Paleontology pt L. Mollusca 4. Cephalopoda: Ammonoidea pp. L11–L79. Geological Society of America, and University of Kansas Press.

[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.

[RR79] Ross, C. A., & J. R. P. Ross. 1979. Permian. In: Robison, R. A., & C. Teichert (eds) Treatise on Invertebrate Paleontology pt A. Introduction. Fossilisation (Taphonomy), Biogeography and Biostratigraphy pp. A291–A350. The Geological Society of America, Inc.: Boulder (Colorado), and The University of Kansas: Lawrence (Kansas).

[ZL04] Zhou, Z., & M. Liengjarern. 2004. Lower Permian perrinitid ammonoid faunas from Thailand. Journal of Paleontology 78: 317–339.

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