Kachpurites is an uppermost Jurassic

Jurassic

The Jurassic is a geologic period and system that extends from about Mya to  Mya, that is, from the end of the Triassic to the beginning of the Cretaceous. The Jurassic constitutes the middle period of the Mesozoic era, also known as the age of reptiles. The start of the period is marked by...

 (Tithonian) ammonite

Ammonitida

The Ammonitida is an order of more highly evolved ammonoid cephalopods from the Jurassic and Cretaceous time periods, commonly with intricate ammonitic sutures....

 included in the perisphincacean

Perisphinctaceae

Perisphinctoidea, formerly Perisphinctaceae, is a superfamily of Middle Jurassic to Lower Cretaceous ammonites, commonly with evolute shells with strong ribbing that typically divides about mid flank before crossing the venter....

family, Craspeditidae; although some classifiers put the Craspeditidae a subfamily in the Polyptychitidae. The shell of Kachpurites is subinvolute with a rounded section and bears low, close spaced, moderately sinuous ribs.

Kachpurites is characteristic of the lower part of the upper Volgan substage in the Russian Platform.

References

• Kachpurites in jsdammonites http://www.jsdammonites.fr/265.html
• Introductory discussion by V.V. Mita (2010) http://ejurassic.ucoz.ru/forum/6-499-1
• Arkell,et al, 1957. Mesozoic Ammonoidea. Treatise on Invertebrate Paleontology, Part L. Geological Soc of America and Univ. Kansas Press.