Gecatogomphius is known from the
holotype PIN 1156/1, a three-dimensionally preserved nearly complete
lower jaw found on the bank of the
Vyatka River near the town of Gorki in the Kirov Oblast, and from PIN 4310/1 a single
maxillary tooth plate from Berezovye Polyanki in Tatarstan. The preserved part of the jawbone fragment has a length of 80
millimeters and is posteriorly expanded to form a very broad shelf that bears five rows of bulbous teeth. ==Etymology==