''Darvasiceras'' was a prolecanitid

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) ...

cephalopod from the Early or Lower

Permian The Permian ( ) is a geologic period and stratigraphic system which spans 47 million years from the end of the Carboniferous Period million years ago (Mya), to the beginning of the Triassic Period 251.9 Mya. It is the last period of the Paleoz ...

Chelamchin Formation of

Tajikistan Tajikistan (, ; tg, Тоҷикистон, Tojikiston; russian: Таджикистан, Tadzhikistan), officially the Republic of Tajikistan ( tg, Ҷумҳурии Тоҷикистон, Jumhurii Tojikiston), is a landlocked country in Centr ...

. The genus is included in what is now the superfamily

Medlicottioidea The Medlicottioidea is one of two superfamilies that make up the Prolecanitida, the other being the Prolecanitoidea. The Medlicottioidea are recognized by their discoidal to thinly lenticular, and involute shells with small umbilici; flat, often ...

. The type species is ''Darvisciceras minum''. The shell of ''Darvasiceras'' is discoidal, moderately involute in adult stages; the venter narrow, smooth, and flat; the umbilicus shallow and small. The external portion of the suture consists of a small ventral and five umbilical lobes (per side). Lobes are weakly developed, are neither deep nor wide, and are separated by extremely wide, rounded saddles. The first two umbilical lobes are bifid, prongs being weakly developed.

References

;Notes ;Web links * Genus ''Darvaciceras'' i
GONIAT online
{{Taxonbar, from=Q16466673 Permian ammonites Cephalopod genera Fossils of Tajikistan