''Clyclolobus'' is a smooth, essentially involute subdiscoidal goniatitid

ammonoid Ammonoids are a group of extinct marine mollusc animals in the subclass Ammonoidea of the class Cephalopoda. These molluscs, commonly referred to as ammonites, are more closely related to living coleoids (i.e., octopuses, squid and cuttlefish) ...

that has sutures with a bifurcate ventral lobe, flared outwardly at the end, in which the halves may be secondarily trifurcated, ending in sharp, narrow projections. Lateral sutural elements follow an acuate line that swings first to the front, then sharply to the rear before becoming hidden by the next whorl. Saddles are narrow, cumulous in appearance with short, irregular, rounded sub-endings. Ventro-lateal lobes are trifurcate with pointed, thorn-like projections.Miller, A.K., Furnish, & Schindewolf. Paleozoic Ammonoidea in the Treatise on Invertebrate Paleontology, Part L, Ammonoidea. Geol Soc of Amererica and U Kansas press. ''Cycolobus'' is a member (Genus) of the Cyclolobidae, a family in the goniatitid superfamily Cyclolobaceae. It has been found for example in Upper Permian sediments in Pakistan and India (Salt Range and Himalaya), south China, Madagascar, and Greenland. According to W. M. Furnish et al. 2009 (revised

Treatise A treatise is a formal and systematic written discourse on some subject, generally longer and treating it in greater depth than an essay, and more concerned with investigating or exposing the principles of the subject and its conclusions."Treat ...

Part L) Cyclolobus belongs to the subfamily Cyclolobinae GONIAT, Cyclolobus,
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References

{{Taxonbar, from=Q5198732 Permian ammonites Prehistoric animals of Madagascar Cyclolobaceae Goniatitida genera